jdk8-mips64-public/jaxws: src/share/jaxws_classes/com/sun/tools/internal/ws/wsdl/parser/WhitespaceStripper.java@b0610cd08440

     1 /*

     2  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    26 package com.sun.tools.internal.ws.wsdl.parser;

    28 import com.sun.xml.internal.bind.WhiteSpaceProcessor;

    29 import org.xml.sax.*;

    30 import org.xml.sax.helpers.XMLFilterImpl;

    32 /**

    33  * Strips ignorable whitespace from SAX event stream.

    34  *

    35  * <p>

    36  * This filter works only when the event stream doesn't

    37  * contain any mixed content.

    38  *

    39  * @author

    40  *     Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)

    41  *     Vivek Pandey

    42  */

    43 class WhitespaceStripper extends XMLFilterImpl {

    45     private int state = 0;

    47     private char[] buf = new char[1024];

    48     private int bufLen = 0;

    50     private static final int AFTER_START_ELEMENT = 1;

    51     private static final int AFTER_END_ELEMENT = 2;

    53     public WhitespaceStripper(XMLReader reader) {

    54         setParent(reader);

    55     }

    57     public WhitespaceStripper(ContentHandler handler, ErrorHandler eh, EntityResolver er) {

    58         setContentHandler(handler);

    59         if(eh!=null)    setErrorHandler(eh);

    60         if(er!=null)    setEntityResolver(er);

    61     }

    63     public void characters(char[] ch, int start, int length) throws SAXException {

    64         switch(state) {

    65         case AFTER_START_ELEMENT:

    66             // we have to store the characters here, even if it consists entirely

    67             // of whitespaces. This is because successive characters event might

    68             // include non-whitespace char, in which case all the whitespaces in

    69             // this event may suddenly become significant.

    70             if( bufLen+length>buf.length ) {

    71                 // reallocate buffer

    72                 char[] newBuf = new char[Math.max(bufLen+length,buf.length*2)];

    73                 System.arraycopy(buf,0,newBuf,0,bufLen);

    74                 buf = newBuf;

    75             }

    76             System.arraycopy(ch,start,buf,bufLen,length);

    77             bufLen += length;

    78             break;

    79         case AFTER_END_ELEMENT:

    80             // check if this is ignorable.

    81             int len = start+length;

    82             for( int i=start; i<len; i++ )

    83                 if( !WhiteSpaceProcessor.isWhiteSpace(ch[i]) ) {

    84                     super.characters(ch, start, length);

    85                     return;

    86                 }

    87             // if it's entirely whitespace, ignore it.

    88             break;

    89         }

    90     }

    92     public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException {

    93         processPendingText();

    94         super.startElement(uri, localName, qName, atts);

    95         state = AFTER_START_ELEMENT;

    96         bufLen = 0;

    97     }

    99     public void endElement(String uri, String localName, String qName) throws SAXException {

   100         processPendingText();

   101         super.endElement(uri, localName, qName);

   102         state = AFTER_END_ELEMENT;

   103     }

   105     /**

   106      * Forwars the buffered characters if it contains any non-whitespace

   107      * character.

   108      */

   109     private void processPendingText() throws SAXException {

   110         if(state==AFTER_START_ELEMENT) {

   111             for( int i=bufLen-1; i>=0; i-- )

   112                 if( !WhiteSpaceProcessor.isWhiteSpace(buf[i]) ) {

   113                     super.characters(buf, 0, bufLen);

   114                     return;

   115                }

   116         }

   117     }

   119     public void ignorableWhitespace(char[] ch, int start, int length) throws SAXException {

   120         // ignore completely.

   121     }

   122 }

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