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/*
 * Copyright (c) 1997, 2020 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 org.glassfish.jaxb.core.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. } }





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