/*
* 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;
}
}