| /* |
| * 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. |
| */ |
| package org.apache.directmemory.lightning.internal.util; |
| |
| public final class StringUtil |
| { |
| |
| private StringUtil() |
| { |
| } |
| |
| public static String toLowerCamelCase( String value ) |
| { |
| if ( value == null ) |
| { |
| return null; |
| } |
| |
| if ( value.length() == 0 ) |
| { |
| return value; |
| } |
| |
| return toCamelCase( value ); |
| } |
| |
| public static String toUpperCamelCase( String value ) |
| { |
| String lowerCamelCase = toLowerCamelCase( value ); |
| return Character.toUpperCase( lowerCamelCase.toCharArray()[0] ) + lowerCamelCase.substring( 1 ); |
| } |
| |
| private static String toCamelCase( String value ) |
| { |
| StringBuilder camelCase = new StringBuilder(); |
| char[] characters = value.toCharArray(); |
| |
| for ( int i = 0; i < characters.length; i++ ) |
| { |
| i = ignoreWhitespace( characters, i ); |
| if ( i == -1 ) |
| { |
| break; |
| } |
| |
| if ( camelCase.length() == 0 ) |
| { |
| camelCase.append( Character.toLowerCase( characters[i] ) ); |
| } |
| else |
| { |
| camelCase.append( Character.toUpperCase( characters[i] ) ); |
| } |
| |
| int nextWhitespace = nextWhitespace( characters, i ); |
| if ( nextWhitespace == -1 ) |
| { |
| nextWhitespace = characters.length; |
| } |
| |
| camelCase.append( value.substring( i + 1, nextWhitespace ) ); |
| i = nextWhitespace; |
| } |
| |
| return camelCase.toString(); |
| } |
| |
| private static int ignoreWhitespace( char[] characters, int offset ) |
| { |
| for ( int i = offset; i < characters.length; i++ ) |
| { |
| char c = characters[i]; |
| if ( !Character.isWhitespace( c ) && '-' != c && '_' != c ) |
| { |
| return i; |
| } |
| } |
| return -1; |
| } |
| |
| private static int nextWhitespace( char[] characters, int offset ) |
| { |
| for ( int i = offset + 1; i < characters.length; i++ ) |
| { |
| char c = characters[i]; |
| if ( Character.isWhitespace( c ) || '-' == c || '_' == c ) |
| { |
| return i; |
| } |
| } |
| return -1; |
| } |
| |
| } |