Source Code Cross Referenced for Util.java in  » Scripting » Pnuts » org » pnuts » xml » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Scripting » Pnuts » org.pnuts.xml 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Util.java
003:         *
004:         * Copyright (c) 2004,2005 Sun Microsystems, Inc. All Rights Reserved.
005:         *
006:         * See the file "LICENSE.txt" for information on usage and redistribution
007:         * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
008:         */
009:        package org.pnuts.xml;
010:
011:        import javax.xml.transform.*;
012:        import javax.xml.transform.stream.*;
013:        import javax.xml.transform.sax.*;
014:        import javax.xml.transform.dom.*;
015:        import javax.xml.parsers.*;
016:        import java.util.*;
017:        import java.beans.*;
018:        import java.io.*;
019:        import java.net.*;
020:        import java.lang.reflect.*;
021:        import org.pnuts.lib.PathHelper;
022:        import pnuts.lang.*;
023:        import pnuts.beans.*;
024:        import org.pnuts.util.LRUCacheMap;
025:        import org.xml.sax.*;
026:        import org.xml.sax.ContentHandler;
027:        import org.xml.sax.helpers.DefaultHandler;
028:        import org.w3c.dom.Node;
029:
030:        public class Util {
031:
032:            private static final String DOCUMENT_BUILDER_KEY = "pnuts$xml$documentBuilderPool"
033:                    .intern();
034:            private static final String TRANSFORMER_KEY = "pnuts$xml$transformerPool"
035:                    .intern();
036:            private static final String SAX_PARSER_KEY = "pnuts$xml$saxParserPool"
037:                    .intern();
038:            private final static String JAVA_ADAPTER = "javaAdapter".intern();
039:            final static Object KEY_SCHEMA = new Object();
040:
041:            private static final Set documentBuilderFactoryProperties = new HashSet();
042:            private static final Set documentBuilderProperties = new HashSet();
043:            static {
044:                String[] attributes = { "coalescing", "ignoringComments",
045:                        "expandEntityReferences",
046:                        "ignoringElementContentWhitespace", "validating",
047:                        "namespaceAware" };
048:                for (int i = 0; i < attributes.length; i++) {
049:                    documentBuilderFactoryProperties.add(attributes[i]);
050:                }
051:                documentBuilderProperties.add("entityResolver");
052:                documentBuilderProperties.add("errorHandler");
053:            }
054:
055:            private static final Set saxParserFactoryProperties = new HashSet();
056:            static {
057:                saxParserFactoryProperties.add("namespaceAware");
058:                saxParserFactoryProperties.add("validating");
059:            }
060:
061:            static SAXParser createSAXParser(Map properties, Context context)
062:                    throws ParserConfigurationException,
063:                    FactoryConfigurationError, SAXException {
064:                SAXParserFactory factory = SAXParserFactory.newInstance();
065:                Object schema = null;
066:                if (properties != null) {
067:                    schema = properties.get(KEY_SCHEMA);
068:                    if (schema != null) {
069:                        setSchema(schema, factory, context);
070:                    }
071:                    try {
072:                        BeanUtil.setProperties(factory, properties);
073:                    } catch (Exception e) {
074:                        // skip
075:                    }
076:                }
077:                SAXParser parser = factory.newSAXParser();
078:                if (schema != null) {
079:                    setSchema(schema, parser, context);
080:                }
081:                return parser;
082:            }
083:
084:            static Transformer getTransformer(Map outputProperties)
085:                    throws TransformerConfigurationException {
086:                Transformer t = TransformerFactory.newInstance()
087:                        .newTransformer();
088:                if (outputProperties != null) {
089:                    for (Iterator it = outputProperties.entrySet().iterator(); it
090:                            .hasNext();) {
091:                        Map.Entry entry = (Map.Entry) it.next();
092:                        t.setOutputProperty((String) entry.getKey(),
093:                                (String) entry.getValue());
094:                    }
095:                }
096:                return t;
097:            }
098:
099:            static DocumentBuilder createDocumentBuilder(Map properties,
100:                    Context context) throws ParserConfigurationException {
101:                DocumentBuilderFactory factory = DocumentBuilderFactory
102:                        .newInstance();
103:                HashMap builderProperties = new HashMap();
104:                if (properties != null) {
105:                    for (Iterator it = properties.entrySet().iterator(); it
106:                            .hasNext();) {
107:                        Map.Entry entry = (Map.Entry) it.next();
108:                        Object key = entry.getKey();
109:                        Object value = entry.getValue();
110:                        if (key == KEY_SCHEMA) {
111:                            setSchema(value, factory, context);
112:                        } else if (key instanceof  String) {
113:                            String prop = (String) key;
114:                            if (documentBuilderFactoryProperties.contains(prop)) {
115:                                try {
116:                                    BeanUtil.setProperty(factory, prop, value);
117:                                } catch (IllegalAccessException ea) {
118:                                    // skip
119:                                } catch (InvocationTargetException ite) {
120:                                    // skip
121:                                }
122:                            } else if (documentBuilderProperties.contains(prop)) {
123:                                builderProperties.put(prop, value);
124:                            } else {
125:                                factory.setAttribute(prop, value);
126:                            }
127:                        }
128:                    }
129:                }
130:                DocumentBuilder builder = factory.newDocumentBuilder();
131:                try {
132:                    BeanUtil.setProperties(builder, builderProperties);
133:                } catch (Exception e) {
134:                    // skip
135:                }
136:                return builder;
137:            }
138:
139:            static synchronized LRUCacheMap createSAXParserPool(int size,
140:                    final Context context) {
141:                LRUCacheMap map = (LRUCacheMap) context.get(SAX_PARSER_KEY);
142:                if (map == null) {
143:                    map = new LRUCacheMap(size) {
144:                        protected Object construct(Object key) {
145:                            try {
146:                                return createSAXParser((Map) key, context);
147:                            } catch (Exception e) {
148:                                throw new PnutsException(e, context);
149:                            }
150:                        }
151:                    };
152:                    context.set(SAX_PARSER_KEY, map);
153:                }
154:                return map;
155:            }
156:
157:            static synchronized LRUCacheMap createTransformerPool(int size,
158:                    final Context context) {
159:                LRUCacheMap map = (LRUCacheMap) context.get(TRANSFORMER_KEY);
160:                if (map == null) {
161:                    map = new LRUCacheMap(size) {
162:                        protected Object construct(Object key) {
163:                            try {
164:                                return getTransformer((Map) key);
165:                            } catch (Exception e) {
166:                                throw new PnutsException(e, context);
167:                            }
168:                        }
169:                    };
170:                    context.set(TRANSFORMER_KEY, map);
171:                }
172:                return map;
173:            }
174:
175:            static synchronized LRUCacheMap createDocumentBuilderPool(int size,
176:                    final Context context) {
177:                LRUCacheMap map = (LRUCacheMap) context
178:                        .get(DOCUMENT_BUILDER_KEY);
179:                if (map == null) {
180:                    map = new LRUCacheMap(size) {
181:                        protected Object construct(Object key) {
182:                            try {
183:                                return createDocumentBuilder((Map) key, context);
184:                            } catch (Exception e) {
185:                                throw new PnutsException(e, context);
186:                            }
187:                        }
188:                    };
189:                    context.set(DOCUMENT_BUILDER_KEY, map);
190:                }
191:                return map;
192:            }
193:
194:            static InputSource inputSource(Object in, Context context)
195:                    throws IOException {
196:                if (in instanceof  InputSource) {
197:                    return (InputSource) in;
198:                } else if (in instanceof  InputStream) {
199:                    return new InputSource((InputStream) in);
200:                } else if (in instanceof  Reader) {
201:                    return new InputSource((Reader) in);
202:                } else if (in instanceof  URL) {
203:                    return new InputSource(((URL) in).toString());
204:                } else if (in instanceof  File) {
205:                    return new InputSource(((File) in).toURL().toString());
206:                } else if (in instanceof  String) {
207:                    return new InputSource(PathHelper.getFile((String) in,
208:                            context).toURL().toString());
209:                } else {
210:                    throw new IllegalArgumentException(String.valueOf(in));
211:                }
212:            }
213:
214:            static ContentHandler contentHandler(Object handler, Context context) {
215:                if (handler instanceof  ContentHandler) {
216:                    return (ContentHandler) handler;
217:                } else {
218:                    PnutsFunction javaAdapter = (PnutsFunction) context
219:                            .resolveSymbol(JAVA_ADAPTER);
220:                    if (javaAdapter != null) {
221:                        if (handler == null) {
222:                            handler = new HashMap();
223:                        }
224:                        return (ContentHandler) javaAdapter.call(new Object[] {
225:                                DefaultHandler.class, handler }, context);
226:                    } else {
227:                        throw new PnutsException("pnuts.lib module is missing",
228:                                context);
229:                    }
230:                }
231:            }
232:
233:            static ErrorHandler errorHandler(Object handler, Context context) {
234:                if (handler instanceof  ErrorHandler) {
235:                    return (ErrorHandler) handler;
236:                } else {
237:                    PnutsFunction javaAdapter = (PnutsFunction) context
238:                            .resolveSymbol(JAVA_ADAPTER);
239:                    if (javaAdapter != null) {
240:                        if (handler == null) {
241:                            handler = new HashMap();
242:                        }
243:                        return (ErrorHandler) javaAdapter.call(new Object[] {
244:                                ErrorHandler.class, handler }, context);
245:                    } else {
246:                        throw new PnutsException("pnuts.lib module is missing",
247:                                context);
248:                    }
249:                }
250:            }
251:
252:            static DocumentBuilder getDocumentBuilder(Map properties,
253:                    Context context) {
254:                LRUCacheMap map = createDocumentBuilderPool(
255:                        Constant.DOCUMENT_BUILDER_POOLSIZE, context);
256:                if (properties == null) {
257:                    properties = new HashMap();
258:                }
259:                return (DocumentBuilder) map.get(properties);
260:            }
261:
262:            static Transformer getTransformer(Map properties, Context context) {
263:                LRUCacheMap map = Util.createTransformerPool(
264:                        Constant.TRANSFORMER_POOLSIZE, context);
265:                if (properties == null) {
266:                    properties = new HashMap();
267:                }
268:                return (Transformer) map.get(properties);
269:            }
270:
271:            static SAXParser getSAXParser(Map properties, Context context) {
272:                LRUCacheMap map = Util.createSAXParserPool(
273:                        Constant.SAX_PARSER_POOLSIZE, context);
274:                if (properties == null) {
275:                    properties = new HashMap();
276:                }
277:                return (SAXParser) map.get(properties);
278:            }
279:
280:            static DefaultHandler getDefaultErrorHandler(Context context) {
281:                return new DefaultErrorHandler(context);
282:            }
283:
284:            static class DefaultErrorHandler extends DefaultHandler {
285:                PrintWriter stream;
286:
287:                DefaultErrorHandler(Context context) {
288:                    stream = context.getErrorWriter();
289:                }
290:
291:                public void warning(SAXParseException exception) {
292:                    stream.println(exception);
293:                }
294:
295:                public void error(SAXParseException exception)
296:                        throws SAXException {
297:                    throw exception;
298:                }
299:
300:                public void fatalError(SAXParseException exception)
301:                        throws SAXException {
302:                    throw exception;
303:                }
304:            }
305:
306:            static Result getResult(Object out, Context context)
307:                    throws IOException {
308:                if (out instanceof  Result) {
309:                    return (Result) out;
310:                } else if (out instanceof  Writer) {
311:                    return new StreamResult((Writer) out);
312:                } else if (out instanceof  OutputStream) {
313:                    return new StreamResult((OutputStream) out);
314:                } else if (out instanceof  File) {
315:                    return new StreamResult(new FileOutputStream((File) out));
316:                } else if (out instanceof  String) {
317:                    return new StreamResult(new FileOutputStream(PathHelper
318:                            .getFile((String) out, context)));
319:                } else if (out instanceof  Node) {
320:                    return new DOMResult((Node) out);
321:                } else {
322:                    throw new IllegalArgumentException(String.valueOf(out));
323:                }
324:            }
325:
326:            static Source streamSource(Object in, Context context)
327:                    throws IOException {
328:                if (in instanceof  Source) {
329:                    return (Source) in;
330:                } else if (in instanceof  Reader) {
331:                    return new StreamSource((Reader) in);
332:                } else if (in instanceof  InputStream) {
333:                    return new StreamSource((InputStream) in);
334:                } else if (in instanceof  URL) {
335:                    return new StreamSource(((URL) in).openStream());
336:                } else if (in instanceof  InputSource) {
337:                    return new SAXSource((InputSource) in);
338:                } else if (in instanceof  Node) {
339:                    return new DOMSource((Node) in);
340:                } else if (in instanceof  File) {
341:                    return new StreamSource(new FileInputStream((File) in));
342:                } else if (in instanceof  String) {
343:                    return new StreamSource(new FileInputStream(PathHelper
344:                            .getFile((String) in, context)));
345:                } else {
346:                    throw new IllegalArgumentException(String.valueOf(in));
347:                }
348:            }
349:
350:            static Transformer getTransformerXSL(Object xsl, Context context) {
351:                try {
352:                    return TransformerFactory.newInstance().newTemplates(
353:                            streamSource(xsl, context)).newTransformer();
354:                } catch (Exception e) {
355:                    throw new PnutsException(e, context);
356:                }
357:            }
358:
359:            static SchemaSetter schemaSetter;
360:            static {
361:                try {
362:                    Class.forName("javax.xml.validation.Schema");
363:                    schemaSetter = new TigerSchemaSetter();
364:                } catch (ClassNotFoundException e) {
365:                    schemaSetter = new DefaultSchemaSetter();
366:                }
367:            }
368:
369:            static void setSchema(Object schema, SAXParserFactory factory,
370:                    Context context) {
371:                schemaSetter.setSchema(schema, factory, context);
372:            }
373:
374:            static void setSchema(Object schema,
375:                    DocumentBuilderFactory factory, Context context) {
376:                schemaSetter.setSchema(schema, factory, context);
377:            }
378:
379:            static void setSchema(Object schema, SAXParser parser,
380:                    Context context) {
381:                schemaSetter.setSchema(schema, parser, context);
382:            }
383:
384:            static interface SchemaSetter {
385:                void setSchema(Object schema, SAXParserFactory factory,
386:                        Context context);
387:
388:                void setSchema(Object schema, SAXParser parser, Context context);
389:
390:                void setSchema(Object schema, DocumentBuilderFactory factory,
391:                        Context context);
392:            }
393:        }
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