| package org.apache.maven.shared.utils; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| |
| import java.util.Arrays; |
| import java.util.Iterator; |
| import java.util.Locale; |
| import java.util.Map; |
| import java.util.StringTokenizer; |
| |
| import javax.annotation.Nonnull; |
| import javax.annotation.Nullable; |
| |
| /** |
| * <p>Common <code>String</code> manipulation routines.</p> |
| * |
| * <p>Originally from |
| * <a href="http://jakarta.apache.org/turbine/">Turbine</a>, the |
| * GenerationJavaCore library and Velocity. |
| * Later a lots methods from commons-lang StringUtils |
| * got added too. Gradually smaller additions and fixes have been made |
| * over the time by various ASF committers.</p> |
| * |
| * @author <a href="mailto:jon@latchkey.com">Jon S. Stevens</a> |
| * @author <a href="mailto:dlr@finemaltcoding.com">Daniel Rall</a> |
| * @author <a href="mailto:gcoladonato@yahoo.com">Greg Coladonato</a> |
| * @author <a href="mailto:bayard@generationjava.com">Henri Yandell</a> |
| * @author <a href="mailto:ed@apache.org">Ed Korthof</a> |
| * @author <a href="mailto:rand_mcneely@yahoo.com">Rand McNeely</a> |
| * @author Stephen Colebourne |
| * @author <a href="mailto:fredrik@westermarck.com">Fredrik Westermarck</a> |
| * @author Holger Krauth |
| * @author <a href="mailto:alex@purpletech.com">Alexander Day Chaffee</a> |
| * |
| */ |
| public class StringUtils |
| { |
| /** |
| * <p><code>StringUtils</code> instances should NOT be constructed in |
| * standard programming. Instead, the class should be used as |
| * <code>StringUtils.trim(" foo ");</code>.</p> |
| * |
| * <p>This constructor is public to permit tools that require a JavaBean |
| * manager to operate.</p> |
| */ |
| public StringUtils() |
| { |
| } |
| |
| // Empty |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * <p>Removes C0 control characters, including ASCII whitespace, from both |
| * ends of this String, handling <code>null</code> by returning |
| * an empty String.</p> |
| * |
| * @param str the String to check |
| * @return the trimmed text (never <code>null</code>) |
| * @see java.lang.String#trim() |
| */ |
| @Nonnull public static String clean( String str ) |
| { |
| return ( str == null ? "" : str.trim() ); |
| } |
| |
| /** |
| * <p>Removes C0 control characters, including ASCII whitespace, from both |
| * ends of this String, handling <code>null</code> by returning |
| * <code>null</code>.</p> |
| * |
| * @param str the String to check |
| * @return the trimmed text (or <code>null</code>) |
| * @see java.lang.String#trim() |
| */ |
| public static String trim( String str ) |
| { |
| return ( str == null ? null : str.trim() ); |
| } |
| |
| /** |
| * <p>Deletes all whitespace from a String.</p> |
| * |
| * <p>Whitespace is defined by |
| * {@link Character#isWhitespace(char)}.</p> |
| * |
| * @param str String target to delete whitespace from |
| * @return the String without whitespace |
| * @throws NullPointerException |
| */ |
| @Nonnull public static String deleteWhitespace( @Nonnull String str ) |
| { |
| StringBuilder buffer = new StringBuilder(); |
| int sz = str.length(); |
| for ( int i = 0; i < sz; i++ ) |
| { |
| if ( !Character.isWhitespace( str.charAt( i ) ) ) |
| { |
| buffer.append( str.charAt( i ) ); |
| } |
| } |
| return buffer.toString(); |
| } |
| |
| /** |
| * <p>Checks if a String is non <code>null</code> and is |
| * not empty (<code>length > 0</code>).</p> |
| * |
| * @param str the String to check |
| * @return true if the String is non-null, and not length zero |
| */ |
| public static boolean isNotEmpty( @Nullable String str ) |
| { |
| return ( ( str != null ) && ( str.length() > 0 ) ); |
| } |
| |
| /** |
| * <p>Checks if a (trimmed) String is <code>null</code> or empty.</p> |
| * |
| * <p><strong>Note:</strong> In future releases, this method will no longer trim the input string such that it works |
| * complementary to {@link #isNotEmpty(String)}. Code that wants to test for whitespace-only strings should be |
| * migrated to use {@link #isBlank(String)} instead.</p> |
| * |
| * @param str the String to check |
| * @return <code>true</code> if the String is <code>null</code>, or |
| * length zero once trimmed |
| */ |
| public static boolean isEmpty( @Nullable String str ) |
| { |
| return ( ( str == null ) || ( str.trim().length() == 0 ) ); |
| } |
| |
| /** |
| * <p> |
| * Checks if a String is whitespace, empty ("") or null. |
| * </p> |
| * |
| * <pre> |
| * StringUtils.isBlank(null) = true |
| * StringUtils.isBlank("") = true |
| * StringUtils.isBlank(" ") = true |
| * StringUtils.isBlank("bob") = false |
| * StringUtils.isBlank(" bob ") = false |
| * </pre> |
| * |
| * @param str the String to check, may be null |
| * @return <code>true</code> if the String is null, empty or whitespace |
| * |
| */ |
| public static boolean isBlank( @Nullable String str ) |
| { |
| int strLen; |
| // CHECKSTYLE_OFF: InnerAssignment |
| if ( str == null || ( strLen = str.length() ) == 0 ) |
| // CHECKSTYLE_ON: InnerAssignment |
| { |
| return true; |
| } |
| for ( int i = 0; i < strLen; i++ ) |
| { |
| if ( !Character.isWhitespace( str.charAt( i ) ) ) |
| { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * <p> |
| * Checks if a String is not empty (""), not null and not whitespace only. |
| * </p> |
| * |
| * <pre> |
| * StringUtils.isNotBlank(null) = false |
| * StringUtils.isNotBlank("") = false |
| * StringUtils.isNotBlank(" ") = false |
| * StringUtils.isNotBlank("bob") = true |
| * StringUtils.isNotBlank(" bob ") = true |
| * </pre> |
| * |
| * @param str the String to check, may be null |
| * @return <code>true</code> if the String is not empty and not null and not whitespace |
| * |
| */ |
| public static boolean isNotBlank( @Nullable String str ) |
| { |
| return !isBlank( str ); |
| } |
| |
| // Equals and IndexOf |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * <p>Compares two Strings, returning <code>true</code> if they are equal.</p> |
| * |
| * <p><code>null</code>s are handled without exceptions. Two <code>null</code> |
| * references are considered to be equal. The comparison is case sensitive.</p> |
| * |
| * @param str1 the first string |
| * @param str2 the second string |
| * @return <code>true</code> if the Strings are equal, case sensitive, or |
| * both <code>null</code> |
| * @see java.lang.String#equals(Object) |
| * @deprecated use {@code java.lang.Objects.equals()} |
| */ |
| @Deprecated |
| public static boolean equals( @Nullable String str1, @Nullable String str2 ) |
| { |
| return ( str1 == null ? str2 == null : str1.equals( str2 ) ); |
| } |
| |
| /** |
| * <p>Compares two Strings, returning <code>true</code> if they are equal ignoring |
| * the case.</p> |
| * |
| * <p><code>Nulls</code> are handled without exceptions. Two <code>null</code> |
| * references are considered equal. Comparison is case insensitive.</p> |
| * |
| * @param str1 the first string |
| * @param str2 the second string |
| * @return <code>true</code> if the Strings are equal, case insensitive, or |
| * both <code>null</code> |
| * @see java.lang.String#equalsIgnoreCase(String) |
| */ |
| public static boolean equalsIgnoreCase( String str1, String str2 ) |
| { |
| return ( str1 == null ? str2 == null : str1.equalsIgnoreCase( str2 ) ); |
| } |
| |
| /** |
| * <p>Find the first index of any of a set of potential substrings.</p> |
| * |
| * <p><code>null</code> String will return <code>-1</code>.</p> |
| * |
| * @param str the String to check |
| * @param searchStrs the Strings to search for |
| * @return the first index of any of the searchStrs in str |
| * @throws NullPointerException if any of searchStrs[i] is <code>null</code> |
| */ |
| public static int indexOfAny( String str, String... searchStrs ) |
| { |
| if ( ( str == null ) || ( searchStrs == null ) ) |
| { |
| return -1; |
| } |
| // String's can't have a MAX_VALUEth index. |
| int ret = Integer.MAX_VALUE; |
| |
| int tmp; |
| for ( String searchStr : searchStrs ) |
| { |
| tmp = str.indexOf( searchStr ); |
| if ( tmp == -1 ) |
| { |
| continue; |
| } |
| |
| if ( tmp < ret ) |
| { |
| ret = tmp; |
| } |
| } |
| |
| return ( ret == Integer.MAX_VALUE ) ? -1 : ret; |
| } |
| |
| /** |
| * <p>Find the latest index of any of a set of potential substrings.</p> |
| * |
| * <p><code>null</code> string will return <code>-1</code>.</p> |
| * |
| * @param str the String to check |
| * @param searchStrs the Strings to search for |
| * @return the last index of any of the Strings |
| * @throws NullPointerException if any of searchStrs[i] is <code>null</code> |
| */ |
| public static int lastIndexOfAny( String str, String... searchStrs ) |
| { |
| if ( ( str == null ) || ( searchStrs == null ) ) |
| { |
| return -1; |
| } |
| int ret = -1; |
| int tmp; |
| for ( String searchStr : searchStrs ) |
| { |
| tmp = str.lastIndexOf( searchStr ); |
| if ( tmp > ret ) |
| { |
| ret = tmp; |
| } |
| } |
| return ret; |
| } |
| |
| // Substring |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * <p>Gets a substring from the specified string avoiding exceptions.</p> |
| * |
| * <p>A negative start position can be used to start <code>n</code> |
| * characters from the end of the String.</p> |
| * |
| * @param str the String to get the substring from |
| * @param start the position to start from, negative means |
| * count back from the end of the String by this many characters |
| * @return substring from start position |
| */ |
| public static String substring( String str, int start ) |
| { |
| if ( str == null ) |
| { |
| return null; |
| } |
| |
| // handle negatives, which means last n characters |
| if ( start < 0 ) |
| { |
| start = str.length() + start; // remember start is negative |
| } |
| |
| if ( start < 0 ) |
| { |
| start = 0; |
| } |
| if ( start > str.length() ) |
| { |
| return ""; |
| } |
| |
| return str.substring( start ); |
| } |
| |
| /** |
| * <p>Gets a substring from the specified String avoiding exceptions.</p> |
| * |
| * <p>A negative start position can be used to start/end <code>n</code> |
| * characters from the end of the String.</p> |
| * |
| * @param str the String to get the substring from |
| * @param start the position to start from, negative means |
| * count back from the end of the string by this many characters |
| * @param end the position to end at (exclusive), negative means |
| * count back from the end of the String by this many characters |
| * @return substring from start position to end position |
| */ |
| public static String substring( String str, int start, int end ) |
| { |
| if ( str == null ) |
| { |
| return null; |
| } |
| |
| // handle negatives |
| if ( end < 0 ) |
| { |
| end = str.length() + end; // remember end is negative |
| } |
| if ( start < 0 ) |
| { |
| start = str.length() + start; // remember start is negative |
| } |
| |
| // check length next |
| if ( end > str.length() ) |
| { |
| // check this works. |
| end = str.length(); |
| } |
| |
| // if start is greater than end, return "" |
| if ( start > end ) |
| { |
| return ""; |
| } |
| |
| if ( start < 0 ) |
| { |
| start = 0; |
| } |
| if ( end < 0 ) |
| { |
| end = 0; |
| } |
| |
| return str.substring( start, end ); |
| } |
| |
| /** |
| * <p>Gets the leftmost <code>n</code> characters of a String.</p> |
| * |
| * <p>If <code>n</code> characters are not available, or the |
| * String is <code>null</code>, the String will be returned without |
| * an exception.</p> |
| * |
| * @param str the String to get the leftmost characters from |
| * @param len the length of the required String |
| * @return the leftmost characters |
| * @throws IllegalArgumentException if len is less than zero |
| */ |
| public static String left( String str, int len ) |
| { |
| if ( len < 0 ) |
| { |
| throw new IllegalArgumentException( "Requested String length " + len + " is less than zero" ); |
| } |
| if ( ( str == null ) || ( str.length() <= len ) ) |
| { |
| return str; |
| } |
| else |
| { |
| return str.substring( 0, len ); |
| } |
| } |
| |
| /** |
| * <p>Gets the rightmost <code>n</code> characters of a String.</p> |
| * |
| * <p>If <code>n</code> characters are not available, or the String |
| * is <code>null</code>, the String will be returned without an |
| * exception.</p> |
| * |
| * @param str the String to get the rightmost characters from |
| * @param len the length of the required String |
| * @return the leftmost characters |
| * @throws IllegalArgumentException if len is less than zero |
| */ |
| public static String right( String str, int len ) |
| { |
| if ( len < 0 ) |
| { |
| throw new IllegalArgumentException( "Requested String length " + len + " is less than zero" ); |
| } |
| if ( ( str == null ) || ( str.length() <= len ) ) |
| { |
| return str; |
| } |
| else |
| { |
| return str.substring( str.length() - len ); |
| } |
| } |
| |
| /** |
| * <p>Gets <code>n</code> characters from the middle of a String.</p> |
| * |
| * <p>If <code>n</code> characters are not available, the remainder |
| * of the String will be returned without an exception. If the |
| * String is <code>null</code>, <code>null</code> will be returned.</p> |
| * |
| * @param str the String to get the characters from |
| * @param pos the position to start from |
| * @param len the length of the required String |
| * @return the leftmost characters |
| * @throws IndexOutOfBoundsException if pos is out of bounds |
| * @throws IllegalArgumentException if len is less than zero |
| */ |
| public static String mid( String str, int pos, int len ) |
| { |
| if ( ( pos < 0 ) || ( ( str != null ) && ( pos > str.length() ) ) ) |
| { |
| throw new StringIndexOutOfBoundsException( "String index " + pos + " is out of bounds" ); |
| } |
| if ( len < 0 ) |
| { |
| throw new IllegalArgumentException( "Requested String length " + len + " is less than zero" ); |
| } |
| if ( str == null ) |
| { |
| return null; |
| } |
| if ( str.length() <= ( pos + len ) ) |
| { |
| return str.substring( pos ); |
| } |
| else |
| { |
| return str.substring( pos, pos + len ); |
| } |
| } |
| |
| // Splitting |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * <p>Splits the provided text into a array, using whitespace as the |
| * separator.</p> |
| * |
| * <p>The separator is not included in the returned String array.</p> |
| * |
| * @param str the String to parse |
| * @return an array of parsed Strings |
| */ |
| @Nonnull public static String[] split( @Nonnull String str ) |
| { |
| return split( str, null, -1 ); |
| } |
| |
| /** |
| * @param text the text to be split |
| * @param separator the separator at which the text will be split |
| * @return the resulting array |
| * @see #split(String, String, int) |
| */ |
| @Nonnull public static String[] split( @Nonnull String text, @Nullable String separator ) |
| { |
| return split( text, separator, -1 ); |
| } |
| |
| /** |
| * <p>Splits the provided text into a array, based on a given separator.</p> |
| * |
| * <p>The separator is not included in the returned String array. The |
| * maximum number of splits to perform can be controlled. A <code>null</code> |
| * separator causes splitting on whitespace.</p> |
| * |
| * <p>This is useful for quickly splitting a String into |
| * an array of tokens, instead of an enumeration of tokens (as |
| * <code>StringTokenizer</code> does).</p> |
| * |
| * @param str the string to parse |
| * @param separator Characters used as the delimiters. If |
| * <code>null</code>, splits on whitespace. |
| * @param max the maximum number of elements to include in the |
| * array. A zero or negative value implies no limit. |
| * @return an array of parsed Strings |
| */ |
| @Nonnull public static String[] split( @Nonnull String str, @Nullable String separator, int max ) |
| { |
| StringTokenizer tok; |
| if ( separator == null ) |
| { |
| // Null separator means we're using StringTokenizer's default |
| // delimiter, which comprises all whitespace characters. |
| tok = new StringTokenizer( str ); |
| } |
| else |
| { |
| tok = new StringTokenizer( str, separator ); |
| } |
| |
| int listSize = tok.countTokens(); |
| if ( ( max > 0 ) && ( listSize > max ) ) |
| { |
| listSize = max; |
| } |
| |
| String[] list = new String[listSize]; |
| int i = 0; |
| int lastTokenBegin; |
| int lastTokenEnd = 0; |
| while ( tok.hasMoreTokens() ) |
| { |
| if ( ( max > 0 ) && ( i == listSize - 1 ) ) |
| { |
| // In the situation where we hit the max yet have |
| // tokens left over in our input, the last list |
| // element gets all remaining text. |
| String endToken = tok.nextToken(); |
| lastTokenBegin = str.indexOf( endToken, lastTokenEnd ); |
| list[i] = str.substring( lastTokenBegin ); |
| break; |
| } |
| else |
| { |
| list[i] = tok.nextToken(); |
| lastTokenBegin = str.indexOf( list[i], lastTokenEnd ); |
| lastTokenEnd = lastTokenBegin + list[i].length(); |
| } |
| i++; |
| } |
| return list; |
| } |
| |
| // Joining |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * <p>Concatenates elements of an array into a single String.</p> |
| * |
| * <p>The difference from join is that concatenate has no delimiter.</p> |
| * |
| * @param array the array of values to concatenate. |
| * @return the concatenated string. |
| */ |
| @Nonnull public static String concatenate( @Nonnull Object... array ) |
| { |
| return join( array, "" ); |
| } |
| |
| /** |
| * <p>Joins the elements of the provided array into a single String |
| * containing the provided list of elements.</p> |
| * |
| * <p>No delimiter is added before or after the list. A |
| * <code>null</code> separator is the same as a blank String.</p> |
| * |
| * @param array the array of values to join together |
| * @param separator the separator character to use |
| * @return the joined String |
| */ |
| @Nonnull public static String join( @Nonnull Object[] array, @Nullable String separator ) |
| { |
| if ( separator == null ) |
| { |
| separator = ""; |
| } |
| int arraySize = array.length; |
| int bufSize = ( arraySize == 0 ? 0 : ( array[0].toString().length() + separator.length() ) * arraySize ); |
| StringBuilder buf = new StringBuilder( bufSize ); |
| |
| for ( int i = 0; i < arraySize; i++ ) |
| { |
| if ( i > 0 ) |
| { |
| buf.append( separator ); |
| } |
| buf.append( array[i] ); |
| } |
| return buf.toString(); |
| } |
| |
| /** |
| * <p>Joins the elements of the provided <code>Iterator</code> into |
| * a single String containing the provided elements.</p> |
| * |
| * <p>No delimiter is added before or after the list. A |
| * <code>null</code> separator is the same as a blank String.</p> |
| * |
| * @param iterator the <code>Iterator</code> of values to join together |
| * @param separator the separator character to use |
| * @return the joined String |
| */ |
| @Nonnull public static String join( @Nonnull Iterator<?> iterator, String separator ) |
| { |
| if ( separator == null ) |
| { |
| separator = ""; |
| } |
| StringBuilder buf = new StringBuilder( 256 ); // Java default is 16, probably too small |
| while ( iterator.hasNext() ) |
| { |
| buf.append( iterator.next() ); |
| if ( iterator.hasNext() ) |
| { |
| buf.append( separator ); |
| } |
| } |
| return buf.toString(); |
| } |
| |
| // Replacing |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * <p>Replace a char with another char inside a larger String, once.</p> |
| * |
| * <p>A <code>null</code> reference passed to this method is a no-op.</p> |
| * |
| * @param text text to search and replace in |
| * @param repl char to search for |
| * @param with char to replace with |
| * @return the text with any replacements processed |
| * @see #replace(String text, char repl, char with, int max) |
| */ |
| public static String replaceOnce( @Nullable String text, char repl, char with ) |
| { |
| return replace( text, repl, with, 1 ); |
| } |
| |
| /** |
| * <p>Replace all occurances of a char within another char.</p> |
| * |
| * <p>A <code>null</code> reference passed to this method is a no-op.</p> |
| * |
| * @param text text to search and replace in |
| * @param repl char to search for |
| * @param with char to replace with |
| * @return the text with any replacements processed |
| * @see #replace(String text, char repl, char with, int max) |
| */ |
| public static String replace( @Nullable String text, char repl, char with ) |
| { |
| return replace( text, repl, with, -1 ); |
| } |
| |
| /** |
| * <p>Replace a char with another char inside a larger String, |
| * for the first <code>max</code> values of the search char.</p> |
| * |
| * <p>A <code>null</code> reference passed to this method is a no-op.</p> |
| * |
| * @param text text to search and replace in |
| * @param repl char to search for |
| * @param with char to replace with |
| * @param max maximum number of values to replace, or <code>-1</code> if no maximum |
| * @return the text with any replacements processed |
| */ |
| public static String replace( @Nullable String text, char repl, char with, int max ) |
| { |
| return replace( text, String.valueOf( repl ), String.valueOf( with ), max ); |
| } |
| |
| /** |
| * <p>Replace a String with another String inside a larger String, once.</p> |
| * |
| * <p>A <code>null</code> reference passed to this method is a no-op.</p> |
| * |
| * @param text text to search and replace in |
| * @param repl String to search for |
| * @param with String to replace with |
| * @return the text with any replacements processed |
| * @see #replace(String text, String repl, String with, int max) |
| */ |
| public static String replaceOnce( @Nullable String text, @Nullable String repl, @Nullable String with ) |
| { |
| return replace( text, repl, with, 1 ); |
| } |
| |
| /** |
| * <p>Replace all occurrences of a String within another String.</p> |
| * |
| * <p>A <code>null</code> reference passed to this method is a no-op.</p> |
| * |
| * @param text text to search and replace in |
| * @param repl String to search for |
| * @param with String to replace with |
| * @return the text with any replacements processed |
| * @see #replace(String text, String repl, String with, int max) |
| */ |
| public static String replace( @Nullable String text, @Nullable String repl, @Nullable String with ) |
| { |
| return replace( text, repl, with, -1 ); |
| } |
| |
| /** |
| * <p>Replace a String with another String inside a larger String, |
| * for the first <code>max</code> values of the search String.</p> |
| * |
| * <p>A <code>null</code> reference passed to this method is a no-op.</p> |
| * |
| * @param text text to search and replace in |
| * @param repl String to search for |
| * @param with String to replace with |
| * @param max maximum number of values to replace, or <code>-1</code> if no maximum |
| * @return the text with any replacements processed |
| */ |
| public static String replace( @Nullable String text, @Nullable String repl, @Nullable String with, int max ) |
| { |
| if ( ( text == null ) || ( repl == null ) || ( with == null ) || ( repl.length() == 0 ) ) |
| { |
| return text; |
| } |
| |
| StringBuilder buf = new StringBuilder( text.length() ); |
| int start = 0, end; |
| while ( ( end = text.indexOf( repl, start ) ) != -1 ) |
| { |
| buf.append( text, start, end ).append( with ); |
| start = end + repl.length(); |
| |
| if ( --max == 0 ) |
| { |
| break; |
| } |
| } |
| buf.append( text, start, text.length() ); |
| return buf.toString(); |
| } |
| |
| /** |
| * <p>Overlay a part of a String with another String.</p> |
| * |
| * @param text String to do overlaying in |
| * @param overlay String to overlay |
| * @param start position to start overlaying at |
| * @param end position to stop overlaying before |
| * @return String with overlaid text |
| * @throws NullPointerException if text or overlay is <code>null</code> |
| */ |
| @Nonnull public static String overlayString( @Nonnull String text, @Nonnull String overlay, int start, int end ) |
| { |
| if ( overlay == null ) |
| { |
| throw new NullPointerException( "overlay is null" ); |
| } |
| return new StringBuilder( start + overlay.length() + text.length() - end + 1 ) |
| .append( text, 0, start ) |
| .append( overlay ) |
| .append( text, end, text.length() ) |
| .toString(); |
| } |
| |
| // Centering |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * <p>Center a String in a larger String of size <code>n</code>.<p> |
| * |
| * <p>Uses spaces as the value to buffer the String with. |
| * Equivalent to <code>center(str, size, " ")</code>.</p> |
| * |
| * @param str String to center |
| * @param size int size of new String |
| * @return String containing centered String |
| * @throws NullPointerException if str is <code>null</code> |
| */ |
| @Nonnull public static String center( @Nonnull String str, int size ) |
| { |
| return center( str, size, " " ); |
| } |
| |
| /** |
| * <p>Center a String in a larger String of size <code>n</code>.</p> |
| * |
| * <p>Uses a supplied String as the value to buffer the String with.</p> |
| * |
| * @param str String to center |
| * @param size int size of new String |
| * @param delim String to buffer the new String with |
| * @return String containing centered String |
| * @throws NullPointerException if str or delim is <code>null</code> |
| * @throws ArithmeticException if delim is the empty String |
| */ |
| @Nonnull public static String center( @Nonnull String str, int size, @Nonnull String delim ) |
| { |
| int sz = str.length(); |
| int p = size - sz; |
| if ( p < 1 ) |
| { |
| return str; |
| } |
| str = leftPad( str, sz + p / 2, delim ); |
| str = rightPad( str, size, delim ); |
| return str; |
| } |
| |
| // Chomping |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * <p>Remove the last newline, and everything after it from a String.</p> |
| * |
| * @param str String to chomp the newline from |
| * @return String without chomped newline |
| * @throws NullPointerException if str is <code>null</code> |
| */ |
| @Nonnull public static String chomp( @Nonnull String str ) |
| { |
| return chomp( str, "\n" ); |
| } |
| |
| /** |
| * <p>Remove the last value of a supplied String, and everything after |
| * it from a String.</p> |
| * |
| * @param str String to chomp from |
| * @param sep String to chomp |
| * @return String without chomped ending |
| * @throws NullPointerException if str or sep is <code>null</code> |
| */ |
| @Nonnull public static String chomp( @Nonnull String str, @Nonnull String sep ) |
| { |
| int idx = str.lastIndexOf( sep ); |
| if ( idx != -1 ) |
| { |
| return str.substring( 0, idx ); |
| } |
| else |
| { |
| return str; |
| } |
| } |
| |
| /** |
| * <p>Remove a newline if and only if it is at the end |
| * of the supplied String.</p> |
| * |
| * @param str String to chomp from |
| * @return String without chomped ending |
| * @throws NullPointerException if str is <code>null</code> |
| */ |
| @Nonnull public static String chompLast( @Nonnull String str ) |
| { |
| return chompLast( str, "\n" ); |
| } |
| |
| /** |
| * <p>Remove a value if and only if the String ends with that value.</p> |
| * |
| * @param str String to chomp from |
| * @param sep String to chomp |
| * @return String without chomped ending |
| * @throws NullPointerException if str or sep is <code>null</code> |
| */ |
| @Nonnull public static String chompLast( @Nonnull String str, @Nonnull String sep ) |
| { |
| if ( str.length() == 0 ) |
| { |
| return str; |
| } |
| String sub = str.substring( str.length() - sep.length() ); |
| if ( sep.equals( sub ) ) |
| { |
| return str.substring( 0, str.length() - sep.length() ); |
| } |
| else |
| { |
| return str; |
| } |
| } |
| |
| /** |
| * <p>Remove everything and return the last value of a supplied String, and |
| * everything after it from a String.</p> |
| * |
| * @param str String to chomp from |
| * @param sep String to chomp |
| * @return String chomped |
| * @throws NullPointerException if str or sep is <code>null</code> |
| */ |
| @Nonnull public static String getChomp( @Nonnull String str, @Nonnull String sep ) |
| { |
| int idx = str.lastIndexOf( sep ); |
| if ( idx == str.length() - sep.length() ) |
| { |
| return sep; |
| } |
| else if ( idx != -1 ) |
| { |
| return str.substring( idx ); |
| } |
| else |
| { |
| return ""; |
| } |
| } |
| |
| /** |
| * <p>Remove the first value of a supplied String, and everything before it |
| * from a String.</p> |
| * |
| * @param str String to chomp from |
| * @param sep String to chomp |
| * @return String without chomped beginning |
| * @throws NullPointerException if str or sep is <code>null</code> |
| */ |
| @Nonnull public static String prechomp( @Nonnull String str, @Nonnull String sep ) |
| { |
| int idx = str.indexOf( sep ); |
| if ( idx != -1 ) |
| { |
| return str.substring( idx + sep.length() ); |
| } |
| else |
| { |
| return str; |
| } |
| } |
| |
| /** |
| * <p>Remove and return everything before the first value of a |
| * supplied String from another String.</p> |
| * |
| * @param str String to chomp from |
| * @param sep String to chomp |
| * @return String prechomped |
| * @throws NullPointerException if str or sep is <code>null</code> |
| */ |
| @Nonnull public static String getPrechomp( @Nonnull String str, @Nonnull String sep ) |
| { |
| int idx = str.indexOf( sep ); |
| if ( idx != -1 ) |
| { |
| return str.substring( 0, idx + sep.length() ); |
| } |
| else |
| { |
| return ""; |
| } |
| } |
| |
| // Chopping |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * <p>Remove the last character from a String.</p> |
| * |
| * <p>If the String ends in <code>\r\n</code>, then remove both |
| * of them.</p> |
| * |
| * @param str String to chop last character from |
| * @return String without last character |
| * @throws NullPointerException if str is <code>null</code> |
| */ |
| @Nonnull public static String chop( @Nonnull String str ) |
| { |
| if ( "".equals( str ) ) |
| { |
| return ""; |
| } |
| if ( str.length() == 1 ) |
| { |
| return ""; |
| } |
| int lastIdx = str.length() - 1; |
| String ret = str.substring( 0, lastIdx ); |
| char last = str.charAt( lastIdx ); |
| if ( last == '\n' ) |
| { |
| if ( ret.charAt( lastIdx - 1 ) == '\r' ) |
| { |
| return ret.substring( 0, lastIdx - 1 ); |
| } |
| } |
| return ret; |
| } |
| |
| /** |
| * <p>Remove <code>\n</code> from end of a String if it's there. |
| * If a <code>\r</code> precedes it, then remove that too.</p> |
| * |
| * @param str String to chop a newline from |
| * @return String without newline |
| * @throws NullPointerException if str is <code>null</code> |
| */ |
| @Nonnull public static String chopNewline( @Nonnull String str ) |
| { |
| int lastIdx = str.length() - 1; |
| char last = str.charAt( lastIdx ); |
| if ( last == '\n' ) |
| { |
| if ( str.charAt( lastIdx - 1 ) == '\r' ) |
| { |
| lastIdx--; |
| } |
| } |
| else |
| { |
| lastIdx++; |
| } |
| return str.substring( 0, lastIdx ); |
| } |
| |
| // Conversion |
| //-------------------------------------------------------------------------- |
| |
| // spec 3.10.6 |
| |
| /** |
| * <p>Escapes any values it finds into their String form.</p> |
| * |
| * <p>So a tab becomes the characters <code>'\\'</code> and |
| * <code>'t'</code>.</p> |
| * |
| * @param str String to escape values in |
| * @return String with escaped values |
| * @throws NullPointerException if str is <code>null</code> |
| */ |
| @Nonnull public static String escape( @Nonnull String str ) |
| { |
| // improved with code from cybertiger@cyberiantiger.org |
| // unicode from him, and defaul for < 32's. |
| int sz = str.length(); |
| StringBuilder buffer = new StringBuilder( 2 * sz ); |
| for ( int i = 0; i < sz; i++ ) |
| { |
| char ch = str.charAt( i ); |
| |
| // handle unicode |
| // CHECKSTYLE_OFF: MagicNumber |
| if ( ch > 0xfff ) |
| { |
| buffer.append( "\\u" ).append( Integer.toHexString( ch ) ); |
| } |
| else if ( ch > 0xff ) |
| { |
| buffer.append( "\\u0" ).append( Integer.toHexString( ch ) ); |
| } |
| else if ( ch > 0x7f ) |
| { |
| buffer.append( "\\u00" ).append( Integer.toHexString( ch ) ); |
| } |
| // CHECKSTYLE_ON: MagicNumber |
| else if ( ch < 32 ) |
| { |
| switch ( ch ) |
| { |
| case '\b': |
| buffer.append( '\\' ); |
| buffer.append( 'b' ); |
| break; |
| case '\n': |
| buffer.append( '\\' ); |
| buffer.append( 'n' ); |
| break; |
| case '\t': |
| buffer.append( '\\' ); |
| buffer.append( 't' ); |
| break; |
| case '\f': |
| buffer.append( '\\' ); |
| buffer.append( 'f' ); |
| break; |
| case '\r': |
| buffer.append( '\\' ); |
| buffer.append( 'r' ); |
| break; |
| default: |
| if ( ch > 0xf ) |
| { |
| buffer.append( "\\u00" ).append( Integer.toHexString( ch ) ); |
| } |
| else |
| { |
| buffer.append( "\\u000" ).append( Integer.toHexString( ch ) ); |
| } |
| break; |
| } |
| } |
| else |
| { |
| switch ( ch ) |
| { |
| case '\'': |
| buffer.append( '\\' ); |
| buffer.append( '\'' ); |
| break; |
| case '"': |
| buffer.append( '\\' ); |
| buffer.append( '"' ); |
| break; |
| case '\\': |
| buffer.append( '\\' ); |
| buffer.append( '\\' ); |
| break; |
| default: |
| buffer.append( ch ); |
| break; |
| } |
| } |
| } |
| return buffer.toString(); |
| } |
| |
| // Padding |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * <p>Repeat a String <code>n</code> times to form a |
| * new string.</p> |
| * |
| * @param str String to repeat |
| * @param repeat number of times to repeat str |
| * @return String with repeated String |
| * @throws NegativeArraySizeException if <code>repeat < 0</code> |
| * @throws NullPointerException if str is <code>null</code> |
| */ |
| @Nonnull public static String repeat( @Nonnull String str, int repeat ) |
| { |
| StringBuilder buffer = new StringBuilder( repeat * str.length() ); |
| for ( int i = 0; i < repeat; i++ ) |
| { |
| buffer.append( str ); |
| } |
| return buffer.toString(); |
| } |
| |
| /** |
| * <p>Right pad a String with spaces.</p> |
| * |
| * <p>The String is padded to the size of <code>n</code>.</p> |
| * |
| * @param str String to repeat |
| * @param size number of times to repeat str |
| * @return right padded String |
| * @throws NullPointerException if str is <code>null</code> |
| */ |
| @Nonnull public static String rightPad( @Nonnull String str, int size ) |
| { |
| return rightPad( str, size, " " ); |
| } |
| |
| /** |
| * <p>Right pad a String with a specified string.</p> |
| * |
| * <p>The String is padded to the size of <code>n</code>.</p> |
| * |
| * @param str String to pad out |
| * @param size size to pad to |
| * @param delim String to pad with |
| * @return right padded String |
| * @throws NullPointerException if str or delim is <code>null</code> |
| * @throws ArithmeticException if delim is the empty String |
| */ |
| @Nonnull public static String rightPad( @Nonnull String str, int size, @Nonnull String delim ) |
| { |
| size = ( size - str.length() ) / delim.length(); |
| if ( size > 0 ) |
| { |
| str += repeat( delim, size ); |
| } |
| return str; |
| } |
| |
| /** |
| * <p>Left pad a String with spaces.</p> |
| * |
| * <p>The String is padded to the size of <code>n</code>.</p> |
| * |
| * @param str String to pad out |
| * @param size size to pad to |
| * @return left padded String |
| * @throws NullPointerException if str or delim is <code>null</code> |
| */ |
| @Nonnull public static String leftPad( @Nonnull String str, int size ) |
| { |
| return leftPad( str, size, " " ); |
| } |
| |
| /** |
| * Left pad a String with a specified string. Pad to a size of n. |
| * |
| * @param str String to pad out |
| * @param size size to pad to |
| * @param delim String to pad with |
| * @return left padded String |
| * @throws NullPointerException if str or delim is null |
| * @throws ArithmeticException if delim is the empty string |
| */ |
| @Nonnull public static String leftPad( @Nonnull String str, int size, @Nonnull String delim ) |
| { |
| size = ( size - str.length() ) / delim.length(); |
| if ( size > 0 ) |
| { |
| str = repeat( delim, size ) + str; |
| } |
| return str; |
| } |
| |
| // Stripping |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * <p>Remove whitespace from the front and back of a String.</p> |
| * |
| * @param str the String to remove whitespace from |
| * @return the stripped String |
| */ |
| public static String strip( String str ) |
| { |
| return strip( str, null ); |
| } |
| |
| /** |
| * <p>Remove a specified String from the front and back of a |
| * String.</p> |
| * |
| * <p>If whitespace is wanted to be removed, used the |
| * {@link #strip(java.lang.String)} method.</p> |
| * |
| * @param str the String to remove a string from |
| * @param delim the String to remove at start and end |
| * @return the stripped String |
| */ |
| public static String strip( String str, @Nullable String delim ) |
| { |
| str = stripStart( str, delim ); |
| return stripEnd( str, delim ); |
| } |
| |
| /** |
| * <p>Strip whitespace from the front and back of every String |
| * in the array.</p> |
| * |
| * @param strs the Strings to remove whitespace from |
| * @return the stripped Strings |
| */ |
| public static String[] stripAll( String... strs ) |
| { |
| return stripAll( strs, null ); |
| } |
| |
| /** |
| * <p>Strip the specified delimiter from the front and back of |
| * every String in the array.</p> |
| * |
| * @param strs the Strings to remove a String from |
| * @param delimiter the String to remove at start and end |
| * @return the stripped Strings |
| */ |
| public static String[] stripAll( String[] strs, @Nullable String delimiter ) |
| { |
| if ( ( strs == null ) || ( strs.length == 0 ) ) |
| { |
| return strs; |
| } |
| int sz = strs.length; |
| String[] newArr = new String[sz]; |
| for ( int i = 0; i < sz; i++ ) |
| { |
| newArr[i] = strip( strs[i], delimiter ); |
| } |
| return newArr; |
| } |
| |
| /** |
| * <p>Strip any of a supplied String from the end of a String.</p> |
| * |
| * <p>If the strip String is <code>null</code>, whitespace is |
| * stripped.</p> |
| * |
| * @param str the String to remove characters from |
| * @param strip the String to remove |
| * @return the stripped String |
| */ |
| public static String stripEnd( String str, @Nullable String strip ) |
| { |
| if ( str == null ) |
| { |
| return null; |
| } |
| int end = str.length(); |
| |
| if ( strip == null ) |
| { |
| while ( ( end != 0 ) && Character.isWhitespace( str.charAt( end - 1 ) ) ) |
| { |
| end--; |
| } |
| } |
| else |
| { |
| while ( ( end != 0 ) && ( strip.indexOf( str.charAt( end - 1 ) ) != -1 ) ) |
| { |
| end--; |
| } |
| } |
| return str.substring( 0, end ); |
| } |
| |
| /** |
| * <p>Strip any of a supplied String from the start of a String.</p> |
| * |
| * <p>If the strip String is <code>null</code>, whitespace is |
| * stripped.</p> |
| * |
| * @param str the String to remove characters from |
| * @param strip the String to remove |
| * @return the stripped String |
| */ |
| public static String stripStart( String str, @Nullable String strip ) |
| { |
| if ( str == null ) |
| { |
| return null; |
| } |
| |
| int start = 0; |
| |
| int sz = str.length(); |
| |
| if ( strip == null ) |
| { |
| while ( ( start != sz ) && Character.isWhitespace( str.charAt( start ) ) ) |
| { |
| start++; |
| } |
| } |
| else |
| { |
| while ( ( start != sz ) && ( strip.indexOf( str.charAt( start ) ) != -1 ) ) |
| { |
| start++; |
| } |
| } |
| return str.substring( start ); |
| } |
| |
| // Case conversion |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * <p>Convert a String to upper case, <code>null</code> String |
| * returns <code>null</code>.</p> |
| * |
| * @param str the String to uppercase |
| * @return the upper cased String |
| */ |
| public static String upperCase( String str ) |
| { |
| if ( str == null ) |
| { |
| return null; |
| } |
| return str.toUpperCase(); |
| } |
| |
| /** |
| * <p>Convert a String to lower case, <code>null</code> String |
| * returns <code>null</code>.</p> |
| * |
| * @param str the string to lowercase |
| * @return the lower cased String |
| */ |
| public static String lowerCase( String str ) |
| { |
| if ( str == null ) |
| { |
| return null; |
| } |
| return str.toLowerCase(); |
| } |
| |
| /** |
| * <p>Uncapitalise a String.</p> |
| * |
| * <p>That is, convert the first character into lower-case. |
| * <code>null</code> is returned as <code>null</code>.</p> |
| * |
| * @param str the String to uncapitalise |
| * @return uncapitalised String |
| */ |
| public static String uncapitalise( String str ) |
| { |
| if ( str == null ) |
| { |
| return null; |
| } |
| else |
| { |
| int length = str.length(); |
| if ( length == 0 ) |
| { |
| return ""; |
| } |
| else |
| { |
| return new StringBuffer( length ) |
| .append( Character.toLowerCase( str.charAt( 0 ) ) ) |
| .append( str, 1, length ) |
| .toString(); |
| } |
| } |
| } |
| |
| /** |
| * <p>Capitalise a String.</p> |
| * |
| * <p>That is, convert the first character into title-case. |
| * <code>null</code> is returned as <code>null</code>.</p> |
| * |
| * @param str the String to capitalise |
| * @return capitalised String |
| */ |
| public static String capitalise( String str ) |
| { |
| if ( str == null ) |
| { |
| return null; |
| } |
| else |
| { |
| int length = str.length(); |
| if ( length == 0 ) |
| { |
| return ""; |
| } |
| else |
| { |
| return new StringBuilder( length ) |
| .append( Character.toTitleCase( str.charAt( 0 ) ) ) |
| .append( str, 1, length ) |
| .toString(); |
| } |
| } |
| } |
| |
| /** |
| * <p>Swaps the case of String.</p> |
| * |
| * <p>Properly looks after making sure the start of words |
| * are Titlecase and not Uppercase.</p> |
| * |
| * <p><code>null</code> is returned as <code>null</code>.</p> |
| * |
| * @param str the String to swap the case of |
| * @return the modified String |
| */ |
| public static String swapCase( String str ) |
| { |
| if ( str == null ) |
| { |
| return null; |
| } |
| int sz = str.length(); |
| StringBuilder buffer = new StringBuilder( sz ); |
| |
| boolean whitespace = false; |
| char ch; |
| char tmp; |
| |
| for ( int i = 0; i < sz; i++ ) |
| { |
| ch = str.charAt( i ); |
| if ( Character.isUpperCase( ch ) ) |
| { |
| tmp = Character.toLowerCase( ch ); |
| } |
| else if ( Character.isTitleCase( ch ) ) |
| { |
| tmp = Character.toLowerCase( ch ); |
| } |
| else if ( Character.isLowerCase( ch ) ) |
| { |
| if ( whitespace ) |
| { |
| tmp = Character.toTitleCase( ch ); |
| } |
| else |
| { |
| tmp = Character.toUpperCase( ch ); |
| } |
| } |
| else |
| { |
| tmp = ch; |
| } |
| buffer.append( tmp ); |
| whitespace = Character.isWhitespace( ch ); |
| } |
| return buffer.toString(); |
| } |
| |
| |
| /** |
| * <p>Capitalise all the words in a String.</p> |
| * |
| * <p>Uses {@link Character#isWhitespace(char)} as a |
| * separator between words.</p> |
| * |
| * <p><code>null</code> will return <code>null</code>.</p> |
| * |
| * @param str the String to capitalise |
| * @return capitalised String |
| */ |
| public static String capitaliseAllWords( String str ) |
| { |
| if ( str == null ) |
| { |
| return null; |
| } |
| int sz = str.length(); |
| StringBuilder buffer = new StringBuilder( sz ); |
| boolean space = true; |
| for ( int i = 0; i < sz; i++ ) |
| { |
| char ch = str.charAt( i ); |
| if ( Character.isWhitespace( ch ) ) |
| { |
| buffer.append( ch ); |
| space = true; |
| } |
| else if ( space ) |
| { |
| buffer.append( Character.toTitleCase( ch ) ); |
| space = false; |
| } |
| else |
| { |
| buffer.append( ch ); |
| } |
| } |
| return buffer.toString(); |
| } |
| |
| /** |
| * <p>Uncapitalise all the words in a string.</p> |
| * |
| * <p>Uses {@link Character#isWhitespace(char)} as a |
| * separator between words.</p> |
| * |
| * <p><code>null</code> will return <code>null</code>.</p> |
| * |
| * @param str the string to uncapitalise |
| * @return uncapitalised string |
| */ |
| public static String uncapitaliseAllWords( String str ) |
| { |
| if ( str == null ) |
| { |
| return null; |
| } |
| int sz = str.length(); |
| StringBuilder buffer = new StringBuilder( sz ); |
| boolean space = true; |
| for ( int i = 0; i < sz; i++ ) |
| { |
| char ch = str.charAt( i ); |
| if ( Character.isWhitespace( ch ) ) |
| { |
| buffer.append( ch ); |
| space = true; |
| } |
| else if ( space ) |
| { |
| buffer.append( Character.toLowerCase( ch ) ); |
| space = false; |
| } |
| else |
| { |
| buffer.append( ch ); |
| } |
| } |
| return buffer.toString(); |
| } |
| |
| // Nested extraction |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * <p>Get the String that is nested in between two instances of the |
| * same String.</p> |
| * |
| * <p>If <code>str</code> is <code>null</code>, will |
| * return <code>null</code>.</p> |
| * |
| * @param str the String containing nested-string |
| * @param tag the String before and after nested-string |
| * @return the String that was nested, or <code>null</code> |
| * @throws NullPointerException if tag is <code>null</code> |
| */ |
| public static String getNestedString( String str, @Nonnull String tag ) |
| { |
| return getNestedString( str, tag, tag ); |
| } |
| |
| /** |
| * <p>Get the String that is nested in between two Strings.</p> |
| * |
| * @param str the String containing nested-string |
| * @param open the String before nested-string |
| * @param close the String after nested-string |
| * @return the String that was nested, or <code>null</code> |
| * @throws NullPointerException if open or close is <code>null</code> |
| */ |
| public static String getNestedString( String str, @Nonnull String open, @Nonnull String close ) |
| { |
| if ( str == null ) |
| { |
| return null; |
| } |
| int start = str.indexOf( open ); |
| if ( start != -1 ) |
| { |
| int end = str.indexOf( close, start + open.length() ); |
| if ( end != -1 ) |
| { |
| return str.substring( start + open.length(), end ); |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * <p>How many times is the substring in the larger String.</p> |
| * |
| * <p><code>null</code> returns <code>0</code>.</p> |
| * |
| * @param str the String to check |
| * @param sub the substring to count |
| * @return the number of occurrences, 0 if the String is <code>null</code> |
| * @throws NullPointerException if sub is <code>null</code> |
| */ |
| public static int countMatches( @Nullable String str, @Nonnull String sub ) |
| { |
| if ( sub.equals( "" ) ) |
| { |
| return 0; |
| } |
| if ( str == null ) |
| { |
| return 0; |
| } |
| int count = 0; |
| int idx = 0; |
| while ( ( idx = str.indexOf( sub, idx ) ) != -1 ) |
| { |
| count++; |
| idx += sub.length(); |
| } |
| return count; |
| } |
| |
| // Character Tests |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * <p>Checks if the String contains only Unicode letters.</p> |
| * |
| * <p><code>null</code> will return <code>false</code>. |
| * An empty String will return <code>true</code>.</p> |
| * |
| * @param str the String to check |
| * @return <code>true</code> if only contains letters, and is non-null |
| */ |
| public static boolean isAlpha( String str ) |
| { |
| if ( str == null ) |
| { |
| return false; |
| } |
| int sz = str.length(); |
| for ( int i = 0; i < sz; i++ ) |
| { |
| if ( !Character.isLetter( str.charAt( i ) ) ) |
| { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * <p>Checks if the String contains only whitespace.</p> |
| * |
| * <p><code>null</code> will return <code>false</code>. An |
| * empty String will return <code>true</code>.</p> |
| * |
| * @param str the String to check |
| * @return <code>true</code> if only contains whitespace, and is non-null |
| */ |
| public static boolean isWhitespace( String str ) |
| { |
| if ( str == null ) |
| { |
| return false; |
| } |
| int sz = str.length(); |
| for ( int i = 0; i < sz; i++ ) |
| { |
| if ( ( !Character.isWhitespace( str.charAt( i ) ) ) ) |
| { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * <p>Checks if the String contains only Unicode letters and |
| * space (<code>' '</code>).</p> |
| * |
| * <p><code>null</code> will return <code>false</code>. An |
| * empty String will return <code>true</code>.</p> |
| * |
| * @param str the String to check |
| * @return <code>true</code> if only contains letters and space, |
| * and is non-null |
| */ |
| public static boolean isAlphaSpace( String str ) |
| { |
| if ( str == null ) |
| { |
| return false; |
| } |
| int sz = str.length(); |
| for ( int i = 0; i < sz; i++ ) |
| { |
| if ( ( !Character.isLetter( str.charAt( i ) ) ) && ( str.charAt( i ) != ' ' ) ) |
| { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * <p>Checks if the String contains only Unicode letters or digits.</p> |
| * |
| * <p><code>null</code> will return <code>false</code>. An empty |
| * String will return <code>true</code>.</p> |
| * |
| * @param str the String to check |
| * @return <code>true</code> if only contains letters or digits, |
| * and is non-null |
| */ |
| public static boolean isAlphanumeric( String str ) |
| { |
| if ( str == null ) |
| { |
| return false; |
| } |
| int sz = str.length(); |
| for ( int i = 0; i < sz; i++ ) |
| { |
| if ( !Character.isLetterOrDigit( str.charAt( i ) ) ) |
| { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * <p>Checks if the String contains only Unicode letters, digits |
| * or space (<code>' '</code>).</p> |
| * |
| * <p><code>null</code> will return <code>false</code>. An empty |
| * String will return <code>true</code>.</p> |
| * |
| * @param str the String to check |
| * @return <code>true</code> if only contains letters, digits or space, |
| * and is non-null |
| */ |
| public static boolean isAlphanumericSpace( String str ) |
| { |
| if ( str == null ) |
| { |
| return false; |
| } |
| int sz = str.length(); |
| for ( int i = 0; i < sz; i++ ) |
| { |
| if ( ( !Character.isLetterOrDigit( str.charAt( i ) ) ) && ( str.charAt( i ) != ' ' ) ) |
| { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * <p>Checks if the String contains only Unicode digits.</p> |
| * |
| * <p><code>null</code> will return <code>false</code>. |
| * An empty String will return <code>true</code>.</p> |
| * |
| * @param str the String to check |
| * @return <code>true</code> if only contains digits, and is non-null |
| */ |
| public static boolean isNumeric( String str ) |
| { |
| if ( str == null ) |
| { |
| return false; |
| } |
| int sz = str.length(); |
| for ( int i = 0; i < sz; i++ ) |
| { |
| if ( !Character.isDigit( str.charAt( i ) ) ) |
| { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| // Defaults |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * <p>Returns either the passed in <code>Object</code> as a String, |
| * or, if the <code>Object</code> is <code>null</code>, an empty |
| * String.</p> |
| * |
| * @param obj the Object to check |
| * @return the passed in Object's toString, or blank if it was |
| * <code>null</code> |
| * @deprecated use {@code java.lang.Objects.toString()} |
| */ |
| @Deprecated |
| @Nonnull public static String defaultString( Object obj ) |
| { |
| return defaultString( obj, "" ); |
| } |
| |
| /** |
| * <p>Returns either the passed in <code>Object</code> as a String, |
| * or, if the <code>Object</code> is <code>null</code>, a passed |
| * in default String.</p> |
| * |
| * @param obj the Object to check |
| * @param defaultString the default String to return if str is |
| * <code>null</code> |
| * @return the passed in string, or the default if it was |
| * <code>null</code> |
| * @deprecated use {@code java.lang.Objects.toString()} |
| */ |
| @Deprecated |
| @Nonnull public static String defaultString( Object obj, @Nonnull String defaultString ) |
| { |
| return ( obj == null ) ? defaultString : obj.toString(); |
| } |
| |
| // Reversing |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * <p>Reverse a String.</p> |
| * |
| * <p><code>null</code> String returns <code>null</code>.</p> |
| * |
| * @param str the String to reverse |
| * @return the reversed String |
| */ |
| public static String reverse( String str ) |
| { |
| if ( str == null ) |
| { |
| return null; |
| } |
| return new StringBuffer( str ).reverse().toString(); |
| } |
| |
| /** |
| * <p>Reverses a String that is delimited by a specific character.</p> |
| * |
| * <p>The Strings between the delimiters are not reversed. |
| * Thus java.lang.String becomes String.lang.java (if the delimiter |
| * is <code>'.'</code>).</p> |
| * |
| * @param str the String to reverse |
| * @param delimiter the delimiter to use |
| * @return the reversed String |
| */ |
| @Nonnull public static String reverseDelimitedString( @Nonnull String str, String delimiter ) |
| { |
| // could implement manually, but simple way is to reuse other, |
| // probably slower, methods. |
| String[] strs = split( str, delimiter ); |
| reverseArray( strs ); |
| return join( strs, delimiter ); |
| } |
| |
| /** |
| * <p>Reverses an array.</p> |
| * |
| * @param array the array to reverse |
| */ |
| private static void reverseArray( @Nonnull String... array ) |
| { |
| int i = 0; |
| int j = array.length - 1; |
| String tmp; |
| |
| while ( j > i ) |
| { |
| tmp = array[j]; |
| array[j] = array[i]; |
| array[i] = tmp; |
| j--; |
| i++; |
| } |
| } |
| |
| // Abbreviating |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * Turn "Now is the time for all good men" into "Now is the time for..." |
| * <p/> |
| * Specifically: |
| * <p/> |
| * If str is less than max characters long, return it. |
| * Else abbreviate it to (substring(str, 0, max-3) + "..."). |
| * If maxWidth is less than 3, throw an IllegalArgumentException. |
| * In no case will it return a string of length greater than maxWidth. |
| * |
| * @param s The string to be abbreviated. |
| * @param maxWidth maximum length of result string |
| * @return The abbreviated string. |
| */ |
| @Nonnull public static String abbreviate( @Nonnull String s, int maxWidth ) |
| { |
| return abbreviate( s, 0, maxWidth ); |
| } |
| |
| /** |
| * Turn "Now is the time for all good men" into "...is the time for..." |
| * <p/> |
| * Works like abbreviate(String, int), but allows you to specify a "left edge" |
| * offset. Note that this left edge is not necessarily going to be the leftmost |
| * character in the result, or the first |
| * character following the ellipses, but it will appear somewhere in the result. |
| * In no case will it return a string of length greater than maxWidth. |
| * |
| * @param s String to abbreviate. |
| * @param offset left edge of source string |
| * @param maxWidth maximum length of result string |
| * @return The abbreviated string. |
| */ |
| @Nonnull public static String abbreviate( @Nonnull String s, int offset, int maxWidth ) |
| { |
| if ( maxWidth < 4 ) |
| { |
| throw new IllegalArgumentException( "Minimum abbreviation width is 4" ); |
| } |
| if ( s.length() <= maxWidth ) |
| { |
| return s; |
| } |
| if ( offset > s.length() ) |
| { |
| offset = s.length(); |
| } |
| if ( ( s.length() - offset ) < ( maxWidth - 3 ) ) |
| { |
| offset = s.length() - ( maxWidth - 3 ); |
| } |
| if ( offset <= 4 ) |
| { |
| return s.substring( 0, maxWidth - 3 ) + "..."; |
| } |
| if ( maxWidth < 7 ) |
| { |
| throw new IllegalArgumentException( "Minimum abbreviation width with offset is 7" ); |
| } |
| if ( ( offset + ( maxWidth - 3 ) ) < s.length() ) |
| { |
| return "..." + abbreviate( s.substring( offset ), maxWidth - 3 ); |
| } |
| return "..." + s.substring( s.length() - ( maxWidth - 3 ) ); |
| } |
| |
| // Difference |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * Compare two strings, and return the portion where they differ. |
| * (More precisely, return the remainder of the second string, |
| * starting from where it's different from the first.) |
| * <p/> |
| * E.g. strdiff("i am a machine", "i am a robot") -> "robot" |
| * |
| * @param s1 The first string. |
| * @param s2 The second string. |
| * @return the portion of s2 where it differs from s1; returns the empty string ("") if they are equal |
| */ |
| public static String difference( @Nonnull String s1, @Nonnull String s2 ) |
| { |
| int at = differenceAt( s1, s2 ); |
| if ( at == -1 ) |
| { |
| return ""; |
| } |
| return s2.substring( at ); |
| } |
| |
| /** |
| * Compare two strings, and return the index at which the strings begin to differ. |
| * <p> |
| * E.g. strdiff("i am a machine", "i am a robot") -> 7 |
| * </p> |
| * |
| * @param s1 The first string. |
| * @param s2 The second string. |
| * @return the index where s2 and s1 begin to differ; -1 if they are equal |
| */ |
| public static int differenceAt( @Nonnull String s1, @Nonnull String s2 ) |
| { |
| int i; |
| for ( i = 0; ( i < s1.length() ) && ( i < s2.length() ); ++i ) |
| { |
| if ( s1.charAt( i ) != s2.charAt( i ) ) |
| { |
| break; |
| } |
| } |
| if ( ( i < s2.length() ) || ( i < s1.length() ) ) |
| { |
| return i; |
| } |
| return -1; |
| } |
| |
| /** |
| * Fill all 'variables' in the given text with the values from the map. |
| * Any text looking like '${key}' will get replaced by the value stored |
| * in the namespace map under the 'key'. |
| * |
| * @param text The text where replacements will be searched for. |
| * @param namespace The namespace which contains the replacements. |
| * @return the interpolated text. |
| */ |
| public static String interpolate( String text, @Nonnull Map<?, ?> namespace ) |
| { |
| for ( Map.Entry<?, ?> entry : namespace.entrySet() ) |
| { |
| String key = entry.getKey().toString(); |
| |
| Object obj = entry.getValue(); |
| |
| if ( obj == null ) |
| { |
| throw new NullPointerException( "The value of the key '" + key + "' is null." ); |
| } |
| |
| String value = obj.toString(); |
| |
| text = replace( text, "${" + key + "}", value ); |
| |
| if ( !key.contains( " " ) ) |
| { |
| text = replace( text, "$" + key, value ); |
| } |
| } |
| return text; |
| } |
| |
| /** |
| * This is basically the inverse of {@link #addAndDeHump(String)}. |
| * It will remove the 'replaceThis' parameter and uppercase the next |
| * character afterwards. |
| * <pre> |
| * removeAndHump( "this-is-it", %quot;-" ); |
| * </pre> |
| * will become 'ThisIsIt'. |
| * |
| * @param data The data. |
| * @param replaceThis The things which should be replaced. |
| * @return humped String |
| */ |
| @Nonnull public static String removeAndHump( @Nonnull String data, @Nonnull String replaceThis ) |
| { |
| String temp; |
| |
| StringBuilder out = new StringBuilder(); |
| |
| temp = data; |
| |
| StringTokenizer st = new StringTokenizer( temp, replaceThis ); |
| |
| while ( st.hasMoreTokens() ) |
| { |
| String element = st.nextToken(); |
| |
| out.append( capitalizeFirstLetter( element ) ); |
| } |
| |
| return out.toString(); |
| } |
| |
| /** |
| * Converts the first character of the given String to uppercase. |
| * This method does <i>not</i> trim spaces! |
| * |
| * @param data the String to get capitalized |
| * @return data string with the first character transformed to uppercase |
| * @throws NullPointerException if data is <code>null</code> |
| * @throws IndexOutOfBoundsException if data is empty |
| */ |
| @Nonnull public static String capitalizeFirstLetter( @Nonnull String data ) |
| { |
| char firstChar = data.charAt( 0 ); |
| char titleCase = Character.toTitleCase( firstChar ); |
| if ( firstChar == titleCase ) |
| { |
| return data; |
| } |
| StringBuilder result = new StringBuilder( data.length() ); |
| result.append( titleCase ); |
| result.append( data, 1, data.length() ); |
| return result.toString(); |
| } |
| |
| /** |
| * Converts the first character of the given String to lowercase. |
| * This method does <i>not</i> trim spaces! |
| * <p/> |
| * |
| * @param data the String to get it's first character lower-cased. |
| * @return data string with the first character transformed to lowercase |
| * @throws NullPointerException if data is <code>null</code> |
| * @throws IndexOutOfBoundsException if data is empty |
| */ |
| @Nonnull public static String lowercaseFirstLetter( @Nonnull String data ) |
| { |
| char firstLetter = Character.toLowerCase( data.substring( 0, 1 ).charAt( 0 ) ); |
| |
| String restLetters = data.substring( 1 ); |
| |
| return firstLetter + restLetters; |
| } |
| |
| /** |
| * Take the input string and un-camel-case it. |
| * <p/> |
| * 'ThisIsIt' will become 'this-is-it'. |
| * |
| * @param view the view |
| * @return deHumped String |
| */ |
| @Nonnull public static String addAndDeHump( @Nonnull String view ) |
| { |
| StringBuilder sb = new StringBuilder(); |
| |
| for ( int i = 0; i < view.length(); i++ ) |
| { |
| if ( ( i != 0 ) && Character.isUpperCase( view.charAt( i ) ) ) |
| { |
| sb.append( '-' ); |
| } |
| |
| sb.append( view.charAt( i ) ); |
| } |
| |
| return sb.toString().trim().toLowerCase( Locale.ENGLISH ); |
| } |
| |
| /** |
| * <p>Quote and escape a String with the given character, handling <code>null</code>.</p> |
| * |
| * <pre> |
| * StringUtils.quoteAndEscape(null, *) = null |
| * StringUtils.quoteAndEscape("", *) = "" |
| * StringUtils.quoteAndEscape("abc", '"') = abc |
| * StringUtils.quoteAndEscape("a\"bc", '"') = "a\"bc" |
| * StringUtils.quoteAndEscape("a\"bc", '\'') = 'a\"bc' |
| * </pre> |
| * |
| * @param source The source. |
| * @param quoteChar The quote character. |
| * @return the String quoted and escaped |
| * @see #quoteAndEscape(String, char, char[], char[], char, boolean) |
| * @see #quoteAndEscape(String, char, char[], char[], char, boolean) |
| * |
| */ |
| public static String quoteAndEscape( @Nullable String source, char quoteChar ) |
| { |
| return quoteAndEscape( source, quoteChar, new char[]{ quoteChar }, new char[]{ ' ' }, '\\', false ); |
| } |
| |
| /** |
| * <p>Quote and escape a String with the given character, handling <code>null</code>.</p> |
| * |
| * @param source the source |
| * @param quoteChar the quote character |
| * @param quotingTriggers the quoting trigger |
| * @return the String quoted and escaped |
| * @see #quoteAndEscape(String, char, char[], char[], char, boolean) |
| * |
| */ |
| public static String quoteAndEscape( @Nullable String source, char quoteChar, @Nonnull char[] quotingTriggers ) |
| { |
| return quoteAndEscape( source, quoteChar, new char[]{ quoteChar }, quotingTriggers, '\\', false ); |
| } |
| |
| /** |
| * @param source the source |
| * @param quoteChar the quote character |
| * @param escapedChars the escaped characters |
| * @param escapeChar the escape character |
| * @param force true/false |
| * @return the String quoted and escaped |
| * @see #quoteAndEscape(String, char, char[], char[], char, boolean) |
| * |
| */ |
| public static String quoteAndEscape( @Nullable String source, char quoteChar, |
| @Nonnull final char[] escapedChars, char escapeChar, boolean force ) |
| { |
| return quoteAndEscape( source, quoteChar, escapedChars, new char[]{ ' ' }, escapeChar, force ); |
| } |
| |
| /** |
| * @param source the source |
| * @param quoteChar the quote character |
| * @param escapedChars set of characters to escape |
| * @param quotingTriggers the quoting trigger |
| * @param escapeChar prefix for escaping a character |
| * @param force true/false |
| * @return the String quoted and escaped |
| */ |
| public static String quoteAndEscape( @Nullable String source, char quoteChar, @Nonnull final char[] escapedChars, |
| @Nonnull final char[] quotingTriggers, char escapeChar, boolean force ) |
| { |
| if ( source == null ) |
| { |
| return null; |
| } |
| |
| if ( !force && source.startsWith( Character.toString( quoteChar ) ) && source.endsWith( |
| Character.toString( quoteChar ) ) ) |
| { |
| return source; |
| } |
| |
| String escaped = escape( source, escapedChars, escapeChar ); |
| |
| boolean quote = false; |
| if ( force ) |
| { |
| quote = true; |
| } |
| else if ( !escaped.equals( source ) ) |
| { |
| quote = true; |
| } |
| else |
| { |
| for ( char quotingTrigger : quotingTriggers ) |
| { |
| if ( escaped.indexOf( quotingTrigger ) > -1 ) |
| { |
| quote = true; |
| break; |
| } |
| } |
| } |
| |
| if ( quote ) |
| { |
| return quoteChar + escaped + quoteChar; |
| } |
| |
| return escaped; |
| } |
| |
| /** |
| * @param source the source |
| * @param escapedChars set of characters to escape |
| * @param escapeChar prefix for escaping a character |
| * @return the String escaped |
| */ |
| public static String escape( @Nullable String source, @Nonnull final char[] escapedChars, char escapeChar ) |
| { |
| if ( source == null ) |
| { |
| return null; |
| } |
| |
| char[] eqc = new char[escapedChars.length]; |
| System.arraycopy( escapedChars, 0, eqc, 0, escapedChars.length ); |
| Arrays.sort( eqc ); |
| |
| StringBuilder buffer = new StringBuilder( source.length() ); |
| |
| for ( int i = 0; i < source.length(); i++ ) |
| { |
| final char c = source.charAt( i ); |
| int result = Arrays.binarySearch( eqc, c ); |
| |
| if ( result > -1 ) |
| { |
| buffer.append( escapeChar ); |
| } |
| buffer.append( c ); |
| } |
| |
| return buffer.toString(); |
| } |
| |
| /** |
| * Remove all duplicate whitespace characters and replace line terminators with a single space. |
| * |
| * @param s a not null String |
| * @return a string with unique whitespace |
| * |
| */ |
| @Nonnull public static String removeDuplicateWhitespace( @Nonnull String s ) |
| { |
| StringBuilder result = new StringBuilder(); |
| int length = s.length(); |
| boolean isPreviousWhiteSpace = false; |
| for ( int i = 0; i < length; i++ ) |
| { |
| char c = s.charAt( i ); |
| boolean thisCharWhiteSpace = Character.isWhitespace( c ); |
| if ( !( isPreviousWhiteSpace && thisCharWhiteSpace ) ) |
| { |
| result.append( c ); |
| } |
| isPreviousWhiteSpace = thisCharWhiteSpace; |
| } |
| return result.toString(); |
| } |
| |
| /** |
| * Parses the given String and replaces all occurrences of |
| * '\n', '\r' and '\r\n' with the system line separator. |
| * |
| * @param s a not null String |
| * @return a String that contains only System line separators |
| * @see #unifyLineSeparators(String, String) |
| * @deprecated this method produces platform dependent code and contributes to |
| * non-reproducible builds. In the context of Maven, this is almost never what's needed. |
| * Remove calls to this method and do not replace them. That is, change |
| * {@code Stringutils.unifyLineSeparators(s)} with simply {@code s}. |
| */ |
| @Deprecated |
| public static String unifyLineSeparators( @Nullable String s ) |
| { |
| return unifyLineSeparators( s, System.getProperty( "line.separator" ) ); |
| } |
| |
| /** |
| * Parses the given String and replaces all occurrences of |
| * '\n', '\r' and '\r\n' with the system line separator. |
| * |
| * @param s a not null String |
| * @param ls the wanted line separator ("\n" on UNIX), if null using the System line separator. |
| * @return a String that contains only System line separators |
| * @throws IllegalArgumentException if ls is not '\n', '\r' and '\r\n' characters. |
| * |
| */ |
| public static String unifyLineSeparators( @Nullable String s, @Nullable String ls ) |
| { |
| if ( s == null ) |
| { |
| return null; |
| } |
| |
| if ( ls == null ) |
| { |
| ls = System.getProperty( "line.separator" ); |
| } |
| |
| if ( !( ls.equals( "\n" ) || ls.equals( "\r" ) || ls.equals( "\r\n" ) ) ) |
| { |
| throw new IllegalArgumentException( "Requested line separator is invalid." ); |
| } |
| |
| int length = s.length(); |
| |
| StringBuilder buffer = new StringBuilder( length ); |
| for ( int i = 0; i < length; i++ ) |
| { |
| if ( s.charAt( i ) == '\r' ) |
| { |
| if ( ( i + 1 ) < length && s.charAt( i + 1 ) == '\n' ) |
| { |
| i++; |
| } |
| |
| buffer.append( ls ); |
| } |
| else if ( s.charAt( i ) == '\n' ) |
| { |
| buffer.append( ls ); |
| } |
| else |
| { |
| buffer.append( s.charAt( i ) ); |
| } |
| } |
| |
| return buffer.toString(); |
| } |
| |
| /** |
| * <p>Checks if String contains a search character, handling <code>null</code>. |
| * This method uses {@link String#indexOf(int)}.</p> |
| * |
| * <p>A <code>null</code> or empty ("") String will return <code>false</code>.</p> |
| * |
| * <pre> |
| * StringUtils.contains(null, *) = false |
| * StringUtils.contains("", *) = false |
| * StringUtils.contains("abc", 'a') = true |
| * StringUtils.contains("abc", 'z') = false |
| * </pre> |
| * |
| * @param str the String to check, may be null |
| * @param searchChar the character to find |
| * @return true if the String contains the search character, |
| * false if not or <code>null</code> string input |
| * |
| */ |
| public static boolean contains( @Nullable String str, char searchChar ) |
| { |
| return !isEmpty( str ) && str.indexOf( searchChar ) >= 0; |
| } |
| |
| /** |
| * <p>Checks if String contains a search String, handling <code>null</code>. |
| * This method uses {@link String#indexOf(int)}.</p> |
| * |
| * <p>A <code>null</code> String will return <code>false</code>.</p> |
| * |
| * <pre> |
| * StringUtils.contains(null, *) = false |
| * StringUtils.contains(*, null) = false |
| * StringUtils.contains("", "") = true |
| * StringUtils.contains("abc", "") = true |
| * StringUtils.contains("abc", "a") = true |
| * StringUtils.contains("abc", "z") = false |
| * </pre> |
| * |
| * @param str the String to check, may be null |
| * @param searchStr the String to find, may be null |
| * @return true if the String contains the search String, |
| * false if not or <code>null</code> string input |
| */ |
| public static boolean contains( @Nullable String str, @Nullable String searchStr ) |
| { |
| return !( str == null || searchStr == null ) && str.contains( searchStr ); |
| } |
| |
| /** |
| * <p>Checks if String ends with a search String, handling <code>null</code>.</p> |
| * <p/> |
| * <p>A <code>null</code> String will return <code>false</code>.</p> |
| * |
| * <pre> |
| * StringUtils.endsWithIgnoreCase(null, *) = false |
| * StringUtils.endsWithIgnoreCase(*, null) = false |
| * StringUtils.endsWithIgnoreCase("", "") = true |
| * StringUtils.endsWithIgnoreCase("abc", "") = true |
| * StringUtils.endsWithIgnoreCase("abc", "C") = true |
| * StringUtils.endsWithIgnoreCase("abc", "a") = false |
| * </pre> |
| * |
| * @param str the String to check, may be null |
| * @param searchStr the String to find at end, may be null |
| * @return true if the String ends with the search String, |
| * false if not or <code>null</code> string input |
| * |
| */ |
| public static boolean endsWithIgnoreCase( @Nullable String str, @Nullable String searchStr ) |
| { |
| if ( str == null || searchStr == null ) |
| { |
| // for consistency with contains |
| return false; |
| } |
| |
| if ( str.length() < searchStr.length() ) |
| { |
| return false; |
| } |
| |
| return str.regionMatches( true, str.length() - searchStr.length(), searchStr, 0, searchStr.length() ); |
| } |
| } |
