| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 1999 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xalan" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 1999, Lotus |
| * Development Corporation., http://www.lotus.com. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| package org.apache.xml.utils; |
| |
| /** |
| * <meta name="usage" content="internal"/> |
| * Class used to verify whether the specified <var>ch</var> |
| * conforms to the XML 1.0 definition of whitespace. |
| */ |
| public class XMLCharacterRecognizer |
| { |
| |
| /** |
| * Returns whether the specified <var>ch</var> conforms to the XML 1.0 definition |
| * of whitespace. Refer to <A href="http://www.w3.org/TR/1998/REC-xml-19980210#NT-S"> |
| * the definition of <CODE>S</CODE></A> for details. |
| * @param ch Character to check as XML whitespace. |
| * @return =true if <var>ch</var> is XML whitespace; otherwise =false. |
| */ |
| public static boolean isWhiteSpace(char ch) |
| { |
| return (ch == 0x20) || (ch == 0x09) || (ch == 0xD) || (ch == 0xA); |
| } |
| |
| /** |
| * Tell if the string is whitespace. |
| * |
| * @param ch Character array to check as XML whitespace. |
| * @param start Start index of characters in the array |
| * @param length Number of characters in the array |
| * @return True if the characters in the array are |
| * XML whitespace; otherwise, false. |
| */ |
| public static boolean isWhiteSpace(char ch[], int start, int length) |
| { |
| |
| int end = start + length; |
| |
| for (int s = start; s < end; s++) |
| { |
| if (!isWhiteSpace(ch[s])) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /** |
| * Tell if the string is whitespace. |
| * |
| * @param buf StringBuffer to check as XML whitespace. |
| * @return True if characters in buffer are XML whitespace, false otherwise |
| */ |
| public static boolean isWhiteSpace(StringBuffer buf) |
| { |
| |
| int n = buf.length(); |
| |
| for (int i = 0; i < n; i++) |
| { |
| if (!isWhiteSpace(buf.charAt(i))) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /** |
| * Tell if the string is whitespace. |
| * |
| * @param buf StringBuffer to check as XML whitespace. |
| * @return True if characters in buffer are XML whitespace, false otherwise |
| */ |
| public static boolean isWhiteSpace(String s) |
| { |
| |
| if(null != s) |
| { |
| int n = s.length(); |
| |
| for (int i = 0; i < n; i++) |
| { |
| if (!isWhiteSpace(s.charAt(i))) |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| } |