001    /*
002     * Copyright (c) 2007 Mozilla Foundation
003     *
004     * Permission is hereby granted, free of charge, to any person obtaining a 
005     * copy of this software and associated documentation files (the "Software"), 
006     * to deal in the Software without restriction, including without limitation 
007     * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
008     * and/or sell copies of the Software, and to permit persons to whom the 
009     * Software is furnished to do so, subject to the following conditions:
010     *
011     * The above copyright notice and this permission notice shall be included in 
012     * all copies or substantial portions of the Software.
013     *
014     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
015     * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
016     * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
017     * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
018     * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
019     * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
020     * DEALINGS IN THE SOFTWARE.
021     */
022    
023    package nu.validator.source;
024    
025    import org.apache.log4j.Logger;
026    import org.xml.sax.Attributes;
027    import org.xml.sax.ContentHandler;
028    import org.xml.sax.Locator;
029    import org.xml.sax.SAXException;
030    import org.xml.sax.ext.LexicalHandler;
031    
032    final class LocationRecorder implements ContentHandler, LexicalHandler {
033        private static final Logger log4j = Logger.getLogger(LocationRecorder.class);
034    
035        private final SourceCode owner;
036        
037        private Locator locator;
038    
039        private String uri;
040    
041        /**
042         * @param owner
043         */
044        LocationRecorder(final SourceCode owner) {
045            this.owner = owner;
046        }
047    
048        /**
049         * 
050         */
051        private void addLocatorLocation() {
052            if (locator != null) {
053                String systemId = locator.getSystemId();
054                log4j.debug(systemId);
055                if (uri == systemId || (uri != null && uri.equals(systemId))) {
056                    owner.addLocatorLocation(locator.getLineNumber(), locator.getColumnNumber());
057                }
058            }
059        }
060    
061        public void characters(char[] arg0, int arg1, int arg2) throws SAXException {
062            addLocatorLocation();
063        }
064    
065    
066        public void endDocument() throws SAXException {
067            locator = null;
068        }
069    
070        public void endElement(String arg0, String arg1, String arg2)
071                throws SAXException {
072            addLocatorLocation();
073        }
074    
075        public void endPrefixMapping(String arg0) throws SAXException {
076        }
077    
078        public void ignorableWhitespace(char[] arg0, int arg1, int arg2)
079                throws SAXException {
080            addLocatorLocation();
081        }
082    
083        public void processingInstruction(String arg0, String arg1)
084                throws SAXException {
085            addLocatorLocation();
086        }
087    
088        public void setDocumentLocator(Locator locator) {
089            this.locator = locator;
090            log4j.debug(locator);
091        }
092    
093        public void skippedEntity(String arg0) throws SAXException {
094            addLocatorLocation();
095        }
096    
097        public void startDocument() throws SAXException {
098            uri = owner.getUri();
099        }
100    
101        public void startElement(String arg0, String arg1, String arg2,
102                Attributes arg3) throws SAXException {
103            addLocatorLocation();
104        }
105    
106        public void startPrefixMapping(String arg0, String arg1)
107                throws SAXException {
108        }
109    
110        public void comment(char[] arg0, int arg1, int arg2) throws SAXException {
111            addLocatorLocation();
112        }
113    
114        public void endCDATA() throws SAXException {
115            addLocatorLocation();
116        }
117    
118        public void endDTD() throws SAXException {
119            addLocatorLocation();
120        }
121    
122        public void endEntity(String arg0) throws SAXException {
123            addLocatorLocation();
124        }
125    
126        public void startCDATA() throws SAXException {
127            addLocatorLocation();
128        }
129    
130        public void startDTD(String arg0, String arg1, String arg2)
131                throws SAXException {
132            addLocatorLocation();
133        }
134    
135        public void startEntity(String arg0) throws SAXException {
136            addLocatorLocation();
137        }
138    
139    }