Source Code Cross Referenced for SAX2RDF.java in  » RSS-RDF » Jena-2.5.5 » com » hp » hpl » jena » rdf » arp » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » RSS RDF » Jena 2.5.5 » com.hp.hpl.jena.rdf.arp 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *  (c) Copyright 2004, 2005, 2006, 2007, 2008 Hewlett-Packard Development Company, LP
003:         *  All rights reserved.
004:         *
005:         * Redistribution and use in source and binary forms, with or without
006:         * modification, are permitted provided that the following conditions
007:         * are met:
008:         * 1. Redistributions of source code must retain the above copyright
009:         *    notice, this list of conditions and the following disclaimer.
010:         * 2. Redistributions in binary form must reproduce the above copyright
011:         *    notice, this list of conditions and the following disclaimer in the
012:         *    documentation and/or other materials provided with the distribution.
013:         * 3. The name of the author may not be used to endorse or promote products
014:         *    derived from this software without specific prior written permission.
015:
016:         * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
017:         * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
018:         * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
019:         * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
020:         * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
021:         * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
022:         * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
023:         * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
024:         * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
025:         * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
026:         
027:         * * $Id: SAX2RDF.java,v 1.20 2008/01/02 12:06:46 andy_seaborne Exp $
028:           
029:           AUTHOR:  Jeremy J. Carroll
030:         */
031:        package com.hp.hpl.jena.rdf.arp;
032:
033:        import org.xml.sax.SAXException;
034:        import org.xml.sax.SAXParseException;
035:        import org.xml.sax.XMLReader;
036:
037:        import com.hp.hpl.jena.rdf.arp.impl.SAX2RDFImpl;
038:        import com.hp.hpl.jena.rdf.arp.impl.XMLHandler;
039:
040:        /**
041:         * <p>
042:         * Allows connecting an arbitrary source of SAX events with ARP.
043:         * </p>
044:         * <p>For use with a DOM tree,
045:         * either use {@link DOM2Model} or
046:         * see <a href="http://javaalmanac.com/egs/javax.xml.transform.sax/Dom2Sax.html">
047:         * The Java Developer's Almanac</a> for a discussion of how to transform a DOM
048:         * into a source of SAX events.
049:         * </p>
050:         * 
051:         * <p>
052:         * The use pattern is to create and initialize one of these,
053:         * then set it as the content, lexical and error handler
054:         * for some source of SAX events (e.g. from a parser).
055:         * The parser must be configured to use namespaces, and namespace
056:         * prefixes. This initializing can be done for XMLReaders
057:         * using {@link #installHandlers}.
058:         * </p>
059:         * 
060:         * <p>
061:         * To build a Jena model it is better to use {@link SAX2Model}.
062:         * The documentation here, covers usage both using the subclass
063:         * {@link SAX2Model}, and not.
064:         * </p>
065:         * <p>
066:         * This class does not support multithreaded SAX sources, nor IO interruption.
067:         * </p>
068:         * <p>
069:         * There is further documentation:
070:         * <a href="../../../../../../../ARP/standalone.html#not-jena">here</a>
071:         * and
072:         * <a href="../../../../../../../ARP/sax.html#sax2rdf">here</a>.
073:         * </p>
074:         * @author Jeremy Carroll
075:         * */
076:        public class SAX2RDF extends SAX2RDFImpl implements  ARPConfig {
077:            /**
078:             * Factory method to create a new SAX2RDF.
079:             * Use
080:             * {@link #getHandlers} or {@link #setHandlersWith} to provide
081:             * a {@link StatementHandler}, and usually an {@link org.xml.sax.ErrorHandler}
082:             *
083:             * @param base The retrieval URL, or the base URI to be 
084:             * used while parsing.
085:             * @deprecated Use {@link #create(String)}.
086:             *  @return A new SAX2RDF
087:             * @throws MalformedURIException
088:             */
089:            static public SAX2RDF newInstance(String base)
090:                    throws MalformedURIException {
091:                try {
092:                    return create(base);
093:                } catch (SAXParseException e) {
094:                    throw new MalformedURIException(e.getMessage());
095:                }
096:            }
097:
098:            /**
099:             * Factory method to create a new SAX2RDF.
100:             * This is particularly
101:             * intended for when parsing a non-root element within
102:             * an XML document. In which case the application
103:             * needs to find this value in the outer context.
104:             * Optionally, namespace prefixes can be passed from the
105:             * outer context using {@link #startPrefixMapping}.
106:             * @param base The retrieval URL, or the base URI to be 
107:             * used while parsing. Use
108:             * {@link #getHandlers} or {@link #setHandlersWith} to provide
109:             * a {@link StatementHandler}, and usually an {@link org.xml.sax.ErrorHandler}
110:             * @param lang The current value of xml:lang when parsing starts, usually "".
111:             * @return A new SAX2RDF
112:             * @throws MalformedURIException If base is bad.
113:             * @deprecated Use {@link #create(String,String)}.
114:             */
115:            static public SAX2RDF newInstance(String base, String lang)
116:                    throws MalformedURIException {
117:                try {
118:                    return create(base, lang);
119:                } catch (SAXParseException e) {
120:                    throw new MalformedURIException(e.getMessage());
121:                }
122:
123:            }
124:
125:            /**
126:             * Factory method to create a new SAX2RDF.
127:             * Use
128:             * {@link #getHandlers} or {@link #setHandlersWith} to provide
129:             * a {@link StatementHandler}, and usually an {@link org.xml.sax.ErrorHandler}
130:             *
131:             * @param base The retrieval URL, or the base URI to be 
132:             * used while parsing.
133:             *  @return A new SAX2RDF
134:             * @throws ParseException
135:             */
136:            static public SAX2RDF create(String base) throws SAXParseException {
137:                return new SAX2RDF(base, "");
138:            }
139:
140:            /**
141:             * Factory method to create a new SAX2RDF.
142:             * This is particularly
143:             * intended for when parsing a non-root element within
144:             * an XML document. In which case the application
145:             * needs to find this value in the outer context.
146:             * Optionally, namespace prefixes can be passed from the
147:             * outer context using {@link #startPrefixMapping}.
148:             * @param base The retrieval URL, or the base URI to be 
149:             * used while parsing. Use
150:             * {@link #getHandlers} or {@link #setHandlersWith} to provide
151:             * a {@link StatementHandler}, and usually an {@link org.xml.sax.ErrorHandler}
152:             * @param lang The current value of xml:lang when parsing starts, usually "".
153:             * @return A new SAX2RDF
154:             * @throws ParseException If base or lang is bad.
155:             */
156:            static public SAX2RDF create(String base, String lang)
157:                    throws SAXParseException {
158:                return new SAX2RDF(base, lang);
159:            }
160:
161:            /**
162:             * Begin the scope of a prefix-URI Namespace mapping.
163:             *
164:             *<p>This is passed to any {@link NamespaceHandler} associated
165:             *with this parser.
166:             *It can be called before the initial 
167:             *<code>startElement</code> event, or other events associated
168:             *with the elements being processed.
169:             *When building a Jena Model, with {@link SAX2Model} it is not required to match this
170:             *with corresponding <code>endPrefixMapping</code> events.
171:             *Other {@link NamespaceHandler}s may be fussier.
172:             *When building a Jena Model, the prefix bindings are
173:             *remembered with the Model, and may be used in some
174:             *output routines. It is permitted to not call this method
175:             *for prefixes declared in the outer context, in which case,
176:             *any output routine will need to use a gensym for such 
177:             *namespaces.
178:             *</p>
179:             * @param prefix The Namespace prefix being declared.
180:             * @param uri The Namespace URI the prefix is mapped to.
181:             * 
182:             */
183:            public void startPrefixMapping(String prefix, String uri)
184:                    throws SAXParseException {
185:                super .startPrefixMapping(prefix, uri);
186:            }
187:
188:            SAX2RDF(String base, String lang) throws SAXParseException {
189:                super (base, lang);
190:
191:                initParse(base);
192:            }
193:
194:            /**
195:             * @deprecated
196:             */
197:            void initParseX(String base, String lang)
198:                    throws MalformedURIException {
199:                try {
200:                    initParse(base, lang);
201:                } catch (SAXParseException e) {
202:                    throw new MalformedURIException(e);
203:                }
204:            }
205:
206:            /**
207:             * Must call initParse after this.
208:             * @deprecated
209:             */
210:            SAX2RDF(String base, String lang, boolean dummy) {
211:                super (base, lang);
212:
213:            }
214:
215:            /**The handlers used for processing ARP events. 
216:             * Do not use with a {@link SAX2Model}.
217:
218:             * @see com.hp.hpl.jena.rdf.arp.ARPConfig#getHandlers()
219:             */
220:            public ARPHandlers getHandlers() {
221:                return super .getHandlers();
222:            }
223:
224:            /**Copys handlers used for processing ARP events. 
225:             * Do not use with a {@link SAX2Model}.
226:            
227:             * @see com.hp.hpl.jena.rdf.arp.ARPConfig#setHandlersWith(ARPHandlers)
228:             */
229:            public void setHandlersWith(ARPHandlers handlers) {
230:                super .setHandlersWith(handlers);
231:            }
232:
233:            /* (non-Javadoc)
234:             * @see com.hp.hpl.jena.rdf.arp.ARPConfig#getOptions()
235:             */
236:            public ARPOptions getOptions() {
237:                return super .getOptions();
238:            }
239:
240:            /* (non-Javadoc)
241:             * @see com.hp.hpl.jena.rdf.arp.ARPConfig#setOptions(com.hp.hpl.jena.rdf.arp.ARPOptions)
242:             */
243:            public void setOptionsWith(ARPOptions opts) {
244:                super .setOptionsWith(opts);
245:
246:            }
247:
248:            /**
249:             * Initializes an XMLReader to use the SAX2RDF object
250:             * as its handler for all events, and to use namespaces
251:             * and namespace prefixes.
252:             * @param rdr The XMLReader to initialize.
253:             * @param sax2rdf The SAX2RDF instance to use.
254:             */
255:            static public void installHandlers(XMLReader rdr, XMLHandler sax2rdf)
256:                    throws SAXException {
257:                rdr.setEntityResolver(sax2rdf);
258:                rdr.setDTDHandler(sax2rdf);
259:                rdr.setContentHandler(sax2rdf);
260:                rdr.setErrorHandler(sax2rdf);
261:                rdr.setFeature("http://xml.org/sax/features/namespaces", true);
262:                rdr
263:                        .setFeature(
264:                                "http://xml.org/sax/features/namespace-prefixes",
265:                                false);
266:                rdr.setProperty(
267:                        "http://xml.org/sax/properties/lexical-handler",
268:                        sax2rdf);
269:                rdr.setFeature(
270:                        "http://apache.org/xml/features/allow-java-encodings",
271:                        true);
272:
273:            }
274:        }
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