| /* |
| * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.tools.internal.ws.wsdl.parser; |
| |
| import com.sun.xml.internal.bind.WhiteSpaceProcessor; |
| import org.xml.sax.*; |
| import org.xml.sax.helpers.XMLFilterImpl; |
| |
| /** |
| * Strips ignorable whitespace from SAX event stream. |
| * |
| * <p> |
| * This filter works only when the event stream doesn't |
| * contain any mixed content. |
| * |
| * @author |
| * Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com) |
| * 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<len; i++ ) |
| if( !WhiteSpaceProcessor.isWhiteSpace(ch[i]) ) { |
| super.characters(ch, start, length); |
| return; |
| } |
| // if it's entirely whitespace, ignore it. |
| break; |
| } |
| } |
| |
| public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException { |
| processPendingText(); |
| super.startElement(uri, localName, qName, atts); |
| state = AFTER_START_ELEMENT; |
| bufLen = 0; |
| } |
| |
| public void endElement(String uri, String localName, String qName) throws SAXException { |
| processPendingText(); |
| super.endElement(uri, localName, qName); |
| state = AFTER_END_ELEMENT; |
| } |
| |
| /** |
| * Forwars the buffered characters if it contains any non-whitespace |
| * character. |
| */ |
| private void processPendingText() throws SAXException { |
| if(state==AFTER_START_ELEMENT) { |
| for( int i=bufLen-1; 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. |
| } |
| } |