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1 package org.ejen.ext;
22
23 import org.ejen.util.XSLUtil;
24 import org.apache.xalan.extensions.XSLProcessorContext;
25 import org.apache.xalan.extensions.ExpressionContext;
26 import org.apache.xalan.templates.ElemExtensionCall;
27 import org.apache.xml.utils.WrappedRuntimeException;
28
29
70 public class Counter {
71
72
73 private static final int DEFAULT_INITIAL_VALUE = 1;
74
75
76 private int _value;
77
78
88 public Counter() {
89 _value = DEFAULT_INITIAL_VALUE;
90 }
91
92
106 public Counter(int value) {
107 _value = value;
108 }
109
110
125 public Counter(Counter cnt) {
126 _value = cnt._value;
127 }
128
129
149 public void reset(XSLProcessorContext context, ElemExtensionCall elem) {
150 Object  o = XSLUtil.getOAttribute(context, elem, "instance",
151 Counter.class, false, false);
152 String value = null;
153
154 try {
155 value = elem.getAttribute("value", context.getContextNode(),
156 context.getTransformer());
157 int iValue = (value != null)
158 ? Integer.parseInt(value)
159 : DEFAULT_INITIAL_VALUE;
160
161 if (o == null) {
162 _value = iValue;
163 } else {
164 ((Counter) o)._value = iValue;
165 }
166 } catch (Exception e) {
167 throw new WrappedRuntimeException(Counter.class.getName()
168 + ".reset : exception while getting or parsing node attribute 'value' or 'instance'",
169 e);
170 }
171 }
172
173
193 public void incr(XSLProcessorContext context, ElemExtensionCall elem) {
194 Object o = XSLUtil.getOAttribute(context, elem, "instance",
195 Counter.class, false, false);
196 String step = null;
197
198 try {
199 step = elem.getAttribute("step", context.getContextNode(),
200 context.getTransformer());
201 int iStep = (step != null) ? Integer.parseInt(step) : 1;
202
203 if (o == null) {
204 _value += iStep;
205 } else {
206 ((Counter) o)._value += iStep;
207 }
208 } catch (Exception e) {
209 throw new WrappedRuntimeException(Counter.class.getName()
210 + ".incr : exception while getting or parsing node attribute 'step'",
211 e);
212 }
213 }
214
215
232 public int read(XSLProcessorContext context, ElemExtensionCall elem) {
233 Object o = XSLUtil.getOAttribute(context, elem, "instance",
234 Counter.class, false, false);
235
236 if (o == null) {
237 return _value;
238 } else {
239 return ((Counter) o)._value;
240 }
241 }
242
243
259 public int read(ExpressionContext context) {
260 return _value;
261 }
262
263
284 public int incrAndRead(XSLProcessorContext context, ElemExtensionCall elem) {
285 Object o = XSLUtil.getOAttribute(context, elem, "instance",
286 Counter.class, false, false);
287 String step = null;
288
289 try {
290 step = elem.getAttribute("step", context.getContextNode(),
291 context.getTransformer());
292 int iStep = (step != null) ? Integer.parseInt(step) : 1;
293
294 if (o == null) {
295 _value += iStep;
296 } else {
297 ((Counter) o)._value += iStep;
298 }
299 } catch (Exception e) {
300 throw new WrappedRuntimeException(Counter.class.getName()
301 + ".incrAndRead : exception while getting or parsing node attribute 'step' or 'instance'",
302 e);
303 }
304 return _value;
305 }
306
307
323 public int incrAndRead(ExpressionContext context) {
324 return ++_value;
325 }
326
327
346 public int incrAndRead(ExpressionContext context, int step) {
347 return (_value += step);
348 }
349
350
371 public int readAndIncr(XSLProcessorContext context, ElemExtensionCall elem) {
372 Object o = XSLUtil.getOAttribute(context, elem, "instance",
373 Counter.class, false, false);
374 int oldValue = _value;
375 String step = null;
376
377 try {
378 step = elem.getAttribute("step", context.getContextNode(),
379 context.getTransformer());
380 int iStep = (step != null) ? Integer.parseInt(step) : 1;
381
382 if (o == null) {
383 _value += iStep;
384 } else {
385 ((Counter) o)._value += iStep;
386 }
387 } catch (Exception e) {
388 throw new WrappedRuntimeException(Counter.class.getName()
389 + ".readAndIncr : exception while getting or parsing node attribute 'step' or 'instance'",
390 e);
391 }
392 return oldValue;
393 }
394
395
411 public int readAndIncr(ExpressionContext context) {
412 return _value++;
413 }
414
415
434 public int readAndIncr(ExpressionContext context, int step) {
435 int oldValue = _value;
436
437 _value += step;
438 return oldValue;
439 }
440 }
441 |
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