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/*
* 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.
*/
/*
* $Id: XMLCharacterRecognizer.java 468655 2006-10-28 07:12:06Z minchau $
*/
/**
* Class used to verify whether the specified <var>ch</var>
* conforms to the XML 1.0 definition of whitespace.
* @xsl.usage internal
*/
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 s String 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;
}
}
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