|
1 package org.ejen.ext;
22
23 import org.ejen.util.XSLUtil;
24 import java.util.Hashtable  ;
25 import java.util.Enumeration ;
26 import org.w3c.dom.Document ;
27 import org.apache.xml.utils.WrappedRuntimeException;
28 import org.apache.xalan.extensions.XSLProcessorContext;
29 import org.apache.xalan.extensions.ExpressionContext;
30 import org.apache.xalan.templates.ElemExtensionCall;
31 import org.apache.xpath.objects.XObject;
32 import org.apache.xpath.objects.XString;
33 import org.apache.xpath.objects.XNodeSet;
34 import org.apache.xpath.objects.XRTreeFrag;
35 import org.apache.xpath.NodeSet;
36
37
86 public class GlobalVariables {
87
88
89 private Hashtable _vars = null;
90
91
101 public GlobalVariables() {
102 _vars = new Hashtable ();
103 }
104
105
120 public GlobalVariables(GlobalVariables gvs) {
121 _vars = new Hashtable (gvs._vars);
122 }
123
124
142 public void clear(XSLProcessorContext context, ElemExtensionCall elem) {
143 Object o = XSLUtil.getOAttribute(context, elem, "instance",
144 GlobalVariables.class, false, false);
145
146 if (o == null) {
147 _vars.clear();
148 } else {
149 ((GlobalVariables) o)._vars.clear();
150 }
151 }
152
153
169 public int size(ExpressionContext context) {
170 return _vars.size();
171 }
172
173
192 public void remove(XSLProcessorContext context, ElemExtensionCall elem) {
193 String name = XSLUtil.getAttribute(context, elem, "name", true);
194 Object o = XSLUtil.getOAttribute(context, elem, "instance",
195 GlobalVariables.class, false, false);
196
197 if (o == null) {
198 _vars.remove(name);
199 } else {
200 ((GlobalVariables) o)._vars.remove(name);
201 }
202 }
203
204
235 public void put(XSLProcessorContext context, ElemExtensionCall elem) {
236 XObject xo = null;
237 String name = XSLUtil.getAttribute(context, elem, "name", true);
238 String select = XSLUtil.getAttribute(context, elem, "select", false);
239 Object o = XSLUtil.getOAttribute(context, elem, "instance",
240 GlobalVariables.class, false, false);
241
242 if (select != null) {
243 xo = XSLUtil.evaluate(context, elem, select);
244 if (xo == null) {
245 throw new WrappedRuntimeException(new IllegalArgumentException ("bad \"select\" attribute ?!"));
246 }
247 } else {
248 String s = XSLUtil.getAttribute(context, elem, "attribute", false);
249
250 if (s != null) {
251 xo = new XString(s);
252 }
253 }
254 if (xo == null) {
255 xo = new XString("(no value)");
256 }
257 if (o == null) {
258 _vars.put(name, xo);
259 } else {
260 ((GlobalVariables) o)._vars.put(name, xo);
261 }
262 }
263
264
283 public XObject get(ExpressionContext context, String name) {
284 return (XObject) (_vars.get(XSLUtil.evaluate(context, name)));
285 }
286
287
308 public XObject get(XSLProcessorContext context, ElemExtensionCall elem) {
309 Object o = XSLUtil.getOAttribute(context, elem, "instance",
310 GlobalVariables.class, false, false);
311 String name = XSLUtil.getAttribute(context, elem, "name", true);
312
313 if (o == null) {
314 return (XObject) (_vars.get(name));
315 } else {
316 return (XObject) (((GlobalVariables) o)._vars.get(name));
317 }
318 }
319
320
348 public NodeSet elements(ExpressionContext context) {
349 Document doc = XSLUtil.getContextDocument(context);
350
351 try {
352 NodeSet ns = new NodeSet();
353
354 for (Enumeration e = _vars.elements(); e.hasMoreElements();) {
355 XObject xo = (XObject) (e.nextElement());
356
357 if (xo instanceof XNodeSet) {
358 ns.addNodes(xo.nodeset());
359 } else if (xo instanceof XRTreeFrag) {
360 ns.addNodes(((XRTreeFrag) xo).convertToNodeset());
361 } else {
362 ns.addElement(doc.createCDATASection(xo.toString()));
363 }
364 }
365 return ns;
366 } catch (Exception e) {
367 throw new WrappedRuntimeException(e);
368 }
369 }
370
371
395 public NodeSet keys(ExpressionContext context) {
396 Document doc = XSLUtil.getContextDocument(context);
397
398 try {
399 NodeSet ns = new NodeSet();
400
401 for (Enumeration e = _vars.keys(); e.hasMoreElements();) {
402 ns.addElement(doc.createCDATASection((String ) (e.nextElement())));
403 }
404 return ns;
405 } catch (Exception e) {
406 throw new WrappedRuntimeException(e);
407 }
408 }
409 }
410 |
Popular Tags |
Java API By Example, From Geeks To Geeks.