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/*
* $Id: XMLCharacterRecognizer.java,v 1.8 2010-11-01 04:34:52 joehw Exp $
*/
package com.sun.org.apache.xml.internal.utils;
/**
* Class used to verify whether the specified ch
* conforms to the XML 1.0 definition of whitespace.
* @xsl.usage internal
*/
public class XMLCharacterRecognizer
{
/**
* Returns whether the specified ch conforms to the XML 1.0 definition
* of whitespace. Refer to
* the definition of S
for details.
* @param ch Character to check as XML whitespace.
* @return =true if ch 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;
}
}