com.sun.tools.ws.wsdl.parser.WhitespaceStripper Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0, which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package com.sun.tools.ws.wsdl.parser;
import com.sun.xml.bind.WhiteSpaceProcessor;
import org.xml.sax.*;
import org.xml.sax.helpers.XMLFilterImpl;
/**
* Strips ignorable whitespace from SAX event stream.
*
*
* This filter works only when the event stream doesn't
* contain any mixed content.
*
* @author
* Kohsuke Kawaguchi ([email protected])
* Vivek Pandey
*/
class WhitespaceStripper extends XMLFilterImpl {
private int state = 0;
private char[] buf = new char[1024];
private int bufLen = 0;
private static final int AFTER_START_ELEMENT = 1;
private static final int AFTER_END_ELEMENT = 2;
public WhitespaceStripper(XMLReader reader) {
setParent(reader);
}
public WhitespaceStripper(ContentHandler handler, ErrorHandler eh, EntityResolver er) {
setContentHandler(handler);
if(eh!=null) setErrorHandler(eh);
if(er!=null) setEntityResolver(er);
}
public void characters(char[] ch, int start, int length) throws SAXException {
switch(state) {
case AFTER_START_ELEMENT:
// we have to store the characters here, even if it consists entirely
// of whitespaces. This is because successive characters event might
// include non-whitespace char, in which case all the whitespaces in
// this event may suddenly become significant.
if( bufLen+length>buf.length ) {
// reallocate buffer
char[] newBuf = new char[Math.max(bufLen+length,buf.length*2)];
System.arraycopy(buf,0,newBuf,0,bufLen);
buf = newBuf;
}
System.arraycopy(ch,start,buf,bufLen,length);
bufLen += length;
break;
case AFTER_END_ELEMENT:
// check if this is ignorable.
int len = start+length;
for( int i=start; i=0; i-- )
if( !WhiteSpaceProcessor.isWhiteSpace(buf[i]) ) {
super.characters(buf, 0, bufLen);
return;
}
}
}
public void ignorableWhitespace(char[] ch, int start, int length) throws SAXException {
// ignore completely.
}
}