Constructing a Data Model Tree Programmatically
This example demonstrates constructing a tree directly using the fragment builder.
001 package org.gxml.book.snoopy;
002
003 import java.io.IOException;
004 import java.io.InputStream;
005 import java.io.StringReader;
006 import java.io.StringWriter;
007 import java.net.URI;
008 import java.net.URISyntaxException;
009
010 import javax.xml.namespace.QName;
011 import javax.xml.parsers.ParserConfigurationException;
012
013 import org.gxml.book.common.SampleApp;
014 import org.gxml.sa.GxException;
015 import org.gxml.sa.GxFragmentBuilder;
016 import org.gxml.sa.GxMetaBridge;
017 import org.gxml.sa.GxModel;
018 import org.gxml.sa.GxNameBridge;
019 import org.gxml.sa.GxProcessingContext;
020 import org.gxml.sa.GxSequenceHandler;
021 import org.gxml.sa.GxVariantBridge;
022 import org.gxml.xdm.NodeKind;
023 import org.gxml.xdm.Resolved;
024 import org.gxml.xdm.Resolver;
025 import org.gxml.xs.SmName;
026
027 import com.tibco.gxml.sa.api.common.lang.ExprException;
028 import com.tibco.gxml.sa.api.common.lang.ExprResult;
029 import com.tibco.gxml.sa.api.common.lang.GxExpr;
030 import com.tibco.gxml.sa.api.common.lang.GxExprContextDynamicArgs;
031 import com.tibco.gxml.sa.api.common.lang.GxExprContextStaticArgs;
032 import com.tibco.gxml.sa.api.common.lang.GxLanguageToolKit;
033 import com.tibco.gxml.sa.common.helpers.DocumentBuilderFactory;
034 import com.tibco.gxml.sa.common.helpers.GxDocumentBuilder;
035 import com.tibco.gxml.sa.common.helpers.GxDocumentBuilderFactory;
036 import com.tibco.gxml.sa.processor.serialization.api.GxSerializerFactory;
037 import com.tibco.gxml.sa.processor.serialization.impl.SerializerFactory;
038 import com.tibco.gxml.sa.processor.xquery.LanguageToolKit;
039 import com.tibco.gxml.sa.processor.xslt.GxTransform;
040 import com.tibco.gxml.sa.processor.xslt.GxTransformBuilder;
041 import com.tibco.gxml.sa.processor.xslt.GxTransformer;
042 import com.tibco.gxml.sa.processor.xslt.XSLTransformBuilder;
043 import com.tibco.gxmlsa.processor.org.exslt.strings.ExsltStringsFunctionGroup;
044
045 public abstract class SnoopySample<I, U, N extends I, A extends I, S, T, X> extends
SampleApp<I, U, N, A, S, T, X>
046 {
047 public void testDocumentFromString()
048 {
049 final GxProcessingContext<I, U, N, A, S, T, X> pcx = newProcessingContext();
050
051 final N document = documentFromString(pcx);
052
053 final GxSerializerFactory<I, U, N, A, S, T, X> sf = new SerializerFactory<I, U, N, A, S, T, X>(pcx);
054
055 sf.setIndent(true);
056
057 final StringWriter sw = new StringWriter();
058
059 final GxSequenceHandler<A, S, T> serializer = sf.newSerializer(sw);
060
061 final GxModel<N, A, S, T> model = pcx.getModel();
062
063 model.stream(document, true, true, serializer);
064
065 // System.out.println(sw.toString());
066 }
067
068 public void testFragmentBuilder()
069 {
070 final GxProcessingContext<I, U, N, A, S, T, X> pcx = newProcessingContext();
071
072 final N document = documentFromEvents(pcx);
073
074 final GxSerializerFactory<I, U, N, A, S, T, X> sf = new SerializerFactory<I, U, N, A, S, T, X>(pcx);
075
076 sf.setIndent(true);
077
078 final StringWriter sw = new StringWriter();
079
080 final GxSequenceHandler<A, S, T> serializer = sf.newSerializer(sw);
081
082 final GxModel<N, A, S, T> model = pcx.getModel();
083
084 model.stream(document, true, true, serializer);
085
086 // System.out.println(sw.toString());
087 }
088
089 private N documentFromString(final GxProcessingContext<I, U, N, A, S, T, X> pcx)
090 {
091 final String strval = "" + "<?xml version='1.0' encoding='UTF-8'?>" + "<book isbn='0836217462'>" + "
<title>Being a Dog Is a Full-Time Job</title>" + " <author>Charles M. Schultz</author>" + " <character>" + "
<name>Snoopy</name>" + " <since>1950-10-04</since>" + " </character>" + "</book>";
092
093 final GxDocumentBuilderFactory<N, S> factory = new DocumentBuilderFactory<I, U, N, A, S, T, X>(pcx);
094
095 final GxDocumentBuilder<N> builder = factory.newDocumentBuilder();
096
097 try
098 {
099 return builder.parse(new StringReader(strval), null);
100 }
101 catch (final IOException e)
102 {
103 throw new AssertionError();
104 }
105 }
106
107 private N documentFromEvents(final GxProcessingContext<I, U, N, A, S, T, X> pcx)
108 {
109 final GxNameBridge<S> nameBridge = pcx.getNameBridge();
110
111 final S NULL_NS_URI = nameBridge.empty();
112 final S BOOK = nameBridge.symbolize("book");
113 final S ISBN = nameBridge.symbolize("isbn");
114 final S TITLE = nameBridge.symbolize("title");
115 final S AUTHOR = nameBridge.symbolize("author");
116 final S CHARACTER = nameBridge.symbolize("character");
117 final S NAME = nameBridge.symbolize("name");
118 final S SINCE = nameBridge.symbolize("since");
119
120 final GxFragmentBuilder<N, A, S, T> builder = pcx.newFragmentBuilder();
121
122 // Note: Using try...finally not only ensures that elements get closed when errors
123 // occur, it also helps to remind you to end elements and makes the levels in
124 // the XML more obvious.
125 builder.startDocument(null);
126 try
127 {
128 builder.startElement(NULL_NS_URI, BOOK, "", null);
129 try
130 {
131 builder.attribute(NULL_NS_URI, ISBN, "", "0836217462");
132 builder.startElement(NULL_NS_URI, TITLE, "", null);
133 try
134 {
135 builder.text("Being a Dog Is a Full-Time Job");
136 }
137 finally
138 {
139 builder.endElement();
140 }
141 builder.startElement(NULL_NS_URI, AUTHOR, "", null);
142 try
143 {
144 builder.text("Charles M. Schultz");
145 }
146 finally
147 {
148 builder.endElement();
149 }
150 builder.startElement(NULL_NS_URI, CHARACTER, "", null);
151 try
152 {
153 builder.startElement(NULL_NS_URI, NAME, "", null);
154 try
155 {
156 builder.text("Snoopy");
157 }
158 finally
159 {
160 builder.endElement();
161 }
162 builder.startElement(NULL_NS_URI, SINCE, "", null);
163 try
164 {
165 builder.text("1950-10-04");
166 }
167 finally
168 {
169 builder.endElement();
170 }
171 }
172 finally
173 {
174 builder.endElement();
175 }
176 }
177 finally
178 {
179 builder.endElement();
180 }
181 }
182 finally
183 {
184 builder.endDocument();
185 }
186
187 return builder.getNodes().get(0);
188 }
189
190 public void testExample() throws ParserConfigurationException, IOException, GxException, ExprException,
URISyntaxException
191 {
192 final GxProcessingContext<I, U, N, A, S, T, X> pcx = newProcessingContext();
193
194 final Resolver resolver = getResolver();
195
196 final URI xmlSystemId = new URI("hotel.xml");
197 final Resolved<InputStream> xmlInput = resolver.resolveInputStream(xmlSystemId);
198
199 final GxDocumentBuilderFactory<N, S> f = new DocumentBuilderFactory<I, U, N, A, S, T, X>(pcx);
200
201 final GxDocumentBuilder<N> builder = f.newDocumentBuilder();
202
203 final N document = builder.parse(xmlInput.getResource(), xmlInput.getSystemId());
204
205 final URI xslSystemId = new URI("hotel.xsl");
206 final Resolved<InputStream> xslInput = resolver.resolveInputStream(xslSystemId);
207
208 final GxTransformBuilder<I, U, N, A, S, T, X> compiler = new XSLTransformBuilder<I, U, N, A, S, T, X>
(pcx);
209
210 // poem.xsl uses version="2.0", but we want to use XPath 1.0 compatibility mode
211 // so that arguments to functions are converted etc.
212 compiler.setCompatibleMode(true);
213
214 final GxTransform<I, U, N, A, S, T, X> compiled = compiler.prepareTransform(xslInput.getResource(),
xslInput.getSystemId());
215
216 final GxSerializerFactory<I, U, N, A, S, T, X> sf = new SerializerFactory<I, U, N, A, S, T, X>(pcx);
217
218 // TODO: Extract the configuration?
219 // compiled.configure(sf);
220
221 sf.setIndent(true);
222
223 final StringWriter w = new StringWriter();
224
225 final GxSequenceHandler<A, S, T> handler = sf.newSerializer(w);
226
227 final GxTransformer<I, U, N, A, S, T, X> transformer = compiled.newTransformer();
228
229 transformer.transform(document, pcx, handler);
230 }
231
232 public void testVariableBinding() throws ParserConfigurationException, IOException, GxException,
ExprException, URISyntaxException
233 {
234 final GxProcessingContext<I, U, N, A, S, T, X> pcx = newProcessingContext();
235
236 final Resolver resolver = getResolver();
237
238 final URI xslSystemId = new URI("email.xsl");
239 final Resolved<InputStream> xslInput = resolver.resolveInputStream(xslSystemId);
240
241 final GxTransformBuilder<I, U, N, A, S, T, X> compiler = new XSLTransformBuilder<I, U, N, A, S, T,
X>(pcx);
242
243 final GxTransform<I, U, N, A, S, T, X> compiled = compiler.prepareTransform(xslInput.getResource(),
xslInput.getSystemId());
244
245 final GxTransformer<I, U, N, A, S, T, X> transformer = compiled.newTransformer();
246
247 final GxNameBridge<S> nameBridge = pcx.getNameBridge();
248 final SmName<S> varName = nameBridge.name(new QName("to"));
249 final GxVariantBridge<I, N, A, X> valueBridge = pcx.getVariantBridge();
250 final X value = valueBridge.stringValue("David");
251
252 transformer.bindVariableValue(varName, value);
253 transformer.bindVariableValue(nameBridge.name(new QName("http://www.example.com", "from")),
valueBridge.stringValue("Julie"));
254
255 final N documentNode = transformer.transform(null, pcx);
256
257 final GxModel<N, A, S, T> model = pcx.getModel();
258
259 assertEquals(NodeKind.DOCUMENT, model.getNodeKind(documentNode));
260 final N email = model.getFirstChildElement(documentNode);
261 final N to = model.getFirstChildElementByName(email, nameBridge.symbolize("http://www.example.com"),
nameBridge.symbolize("to"));
262 assertEquals("David", model.getStringValue(to));
263 final N from = model.getFirstChildElementByName(email, null, nameBridge.symbolize("from"));
264 assertEquals("Julie", model.getStringValue(from));
265 final N again = model.getFirstChildElementByName(email, nameBridge.symbolize("http://www.example.com"),
null);
266 assertEquals("David", model.getStringValue(again));
267 }
268
269 public void testExternalFunctions() throws ParserConfigurationException, IOException, GxException,
ExprException, URISyntaxException
270 {
271 final GxProcessingContext<I, U, N, A, S, T, X> pcx = newProcessingContext();
272
273 final Resolver resolver = getResolver();
274
275 final URI xmlSystemId = new URI("exslt.xml");
276 final Resolved<InputStream> xmlInput = resolver.resolveInputStream(xmlSystemId);
277
278 final GxDocumentBuilderFactory<N, S> f = new DocumentBuilderFactory<I, U, N, A, S, T, X>(pcx);
279
280 final GxDocumentBuilder<N> builder = f.newDocumentBuilder();
281
282 final N document = builder.parse(xmlInput.getResource(), xmlInput.getSystemId());
283
284 final URI xslSystemId = new URI("exslt.xsl");
285 final Resolved<InputStream> xslInput = resolver.resolveInputStream(xslSystemId);
286
287 final GxTransformBuilder<I, U, N, A, S, T, X> compiler = new XSLTransformBuilder<I, U, N, A, S, T, X>
(pcx);
288
289 final String namespaceURI = "http://exslt.org/strings";
290 final ExsltStringsFunctionGroup<I, U, N, A, S, T, X> functions =
new ExsltStringsFunctionGroup<I, U, N, A, S, T, X>(namespaceURI, pcx);
291 compiler.setFunctionSigns(namespaceURI, functions);
292 compiler.setFunctionImpls(namespaceURI, functions);
293
294 final GxTransform<I, U, N, A, S, T, X> compiled = compiler.prepareTransform(xslInput.getResource(),
xslInput.getSystemId());
295
296 final GxSerializerFactory<I, U, N, A, S, T, X> sf = new SerializerFactory<I, U, N, A, S, T, X>(pcx);
297
298 // TODO: Extract the configuration.
299 // compiled.configure(sf);
300
301 sf.setIndent(true);
302
303 final StringWriter w = new StringWriter();
304
305 final GxSequenceHandler<A, S, T> handler = sf.newSerializer(w);
306
307 final GxTransformer<I, U, N, A, S, T, X> transformer = compiled.newTransformer();
308
309 transformer.transform(document, pcx, handler);
310
311 // System.out.println(w.toString());
312 }
313
314 public void testHotel() throws ParserConfigurationException, IOException, GxException, ExprException,
URISyntaxException
315 {
316 final GxProcessingContext<I, U, N, A, S, T, X> pcx = newProcessingContext();
317
318 final Resolver resolver = getResolver();
319
320 final URI xmlSystemId = new URI("hotel.xml");
321 final Resolved<InputStream> xmlInput = resolver.resolveInputStream(xmlSystemId);
322
323 final GxDocumentBuilderFactory<N, S> f = new DocumentBuilderFactory<I, U, N, A, S, T, X>(pcx);
324
325 final GxDocumentBuilder<N> builder = f.newDocumentBuilder();
326
327 final N document = builder.parse(xmlInput.getResource(), xmlInput.getSystemId());
328
329 final URI xslSystemId = new URI("hotel.xsl");
330 final Resolved<InputStream> xslInput = resolver.resolveInputStream(xslSystemId);
331
332 final GxTransformBuilder<I, U, N, A, S, T, X> compiler = new XSLTransformBuilder<I, U, N, A, S, T, X>
(pcx);
333
334 final GxTransform<I, U, N, A, S, T, X> compiled = compiler.prepareTransform(xslInput.getResource(),
xslInput.getSystemId());
335
336 final GxSerializerFactory<I, U, N, A, S, T, X> sf = new SerializerFactory<I, U, N, A, S, T, X>(pcx);
337
338 // TODO: Extract the configuration.
339 // compiled.configure(sf);
340
341 sf.setIndent(true);
342
343 final StringWriter w = new StringWriter();
344
345 final GxSequenceHandler<A, S, T> handler = sf.newSerializer(w);
346
347 final GxTransformer<I, U, N, A, S, T, X> transformer = compiled.newTransformer();
348 final GxNameBridge<S> nameBridge = pcx.getNameBridge();
349 final SmName<S> varName = nameBridge.name(new QName("MessageData"));
350 final GxVariantBridge<I, N, A, X> valueBridge = pcx.getVariantBridge();
351 final X value = valueBridge.node(document);
352
353 transformer.bindVariableValue(varName, value);
354
355 transformer.transform(null, pcx, handler);
356
357 // System.out.println(w.toString());
358 }
359
360 public void testHelloWorld() throws Exception
361 {
362 final GxProcessingContext<I, U, N, A, S, T, X> pcx = newProcessingContext();
363 final GxNameBridge<S> nameBridge = pcx.getNameBridge();
364
365 final GxLanguageToolKit<I, U, N, A, S, T, X> xtk = new LanguageToolKit<I, U,
N, A, S, T, X>(pcx);
366
367 final GxExprContextStaticArgs<I, U, N, A, S, T, X> senv = xtk.newStaticContextArgs();
368 final String NAMESPACE = "http://www.peanuts.com";
369
370 senv.getInScopeNamespaces().declarePrefix("nuts", nameBridge.symbolize(NAMESPACE));
371
372 final SnoopyFunctionGroup<I, U, N, A, S, T, X> peanutsFunctionGroup = new
SnoopyFunctionGroup<I, U, N, A, S, T, X>(NAMESPACE, pcx);
373 senv.setFunctionSigns(NAMESPACE, peanutsFunctionGroup);
374 senv.setFunctionImpls(NAMESPACE, peanutsFunctionGroup);
375
376 final GxMetaBridge<A, S, T> metaBridge = pcx.getMetaBridge();
377
378 final ExprResult<I, U, N, A, S, T, X> prepared = xtk.prepare
("nuts:GetVariableProperty('foo','bar')", metaBridge.emptyType(), senv);
379
380 final GxExpr<I, U, N, A, S, T, X> expr = prepared.getExpr();
381
382 final GxExprContextDynamicArgs<I, U, N, A, S, T, X> darg =
xtk.newDynamicContextArgs();
383
384 final String strval = expr.stringFunction(xtk.emptyFocus(), darg, pcx);
385
386 assertEquals("Bingo!", strval);
387 }
388 }
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