|
1
28
29 package com.caucho.xsl.java;
30
31 import com.caucho.java.JavaWriter;
32 import com.caucho.xml.QName;
33 import com.caucho.xpath.pattern.AbstractPattern;
34 import com.caucho.xsl.Sort;
35 import com.caucho.xsl.XslParseException;
36
37 import java.util.ArrayList  ;
38
39
42 public class XslForEach extends XslNode {
43 private String _select;
44
45 private ArrayList <XslSort> _sorts = new ArrayList <XslSort>();
46
47
50 public void addAttribute(QName name, String value)
51 throws XslParseException
52 {
53 if (name.getName().equals("select")) {
54 _select = value;
55 }
56 else
57 super.addAttribute(name, value);
58 }
59
60
63 public void endAttributes()
64 throws XslParseException
65 {
66
70 }
71
72
75 public void addChild(XslNode node)
76 throws XslParseException
77 {
78 if (node instanceof XslSort) {
79 _sorts.add((XslSort) node);
80 }
81 else
82 super.addChild(node);
83 }
84
85
90 public void generate(JavaWriter out)
91 throws Exception
92 {
93 if (_sorts.size() != 0) {
94 printForEachSort(out);
95 return;
96 }
97
98 out.println("{");
99 out.pushDepth();
100
101 AbstractPattern select = parseSelect(_select);
102
103 boolean hasExprEnv = ! allowJavaSelect(select);
104
105 int id = _gen.generateId();
106
107 String sel = "_xsl_sel" + id;
108 String oldCxt = "_xsl_cxt" + id;
109 String oldCur = "_xsl_cur" + id;
110 String oldSel = "_xsl_old_sel" + id;
111 String oldEnv = "_xsl_env" + id;
112 String oldSize = "_xsl_old_size" + id;
113
114 out.println("com.caucho.xpath.pattern.AbstractPattern " + sel + ";");
115 out.print(sel + " = _select_patterns[");
116 out.print(_gen.addSelect(select));
117 out.println("];");
118 out.println("Node " + oldCxt + " = env.getContextNode();");
119 out.println("Node " + oldCur + " = env.getCurrentNode();");
120
121 if (! hasExprEnv) {
122 out.println("AbstractPattern " + oldSel + " = env.setSelect(node, " + sel + ");");
123 out.println("int " + oldSize + " = env.setContextSize(0);");
124 }
125
126
127 String iter = "_xsl_iter" + _gen.generateId();
129
130 int oldSelectDepth = _gen.getSelectDepth();
131
132
134 boolean hasEnv = false;
135
136 if (allowJavaSelect(select)) {
137 out.println("ExprEnvironment " + oldEnv + " = env.setExprEnv(null);");
138
139 String ptr = printSelectBegin(out, select, true, null);
140
141 _gen.pushLoop();
142 out.println("Node " + _gen.getElement() + " = node;");
143 out.println("node = " + ptr + ";");
144 }
145 else {
146 out.print("NodeIterator " + iter + " = " + sel);
147 out.println(".select(node, " + getEnv() + ");");
148 out.println("ExprEnvironment " + oldEnv + " = env.setExprEnv(" + iter + ");");
149 out.println("while (" + iter + ".hasNext()) {");
150 out.pushDepth();
151 _gen.setSelectDepth(_gen.getSelectDepth() + 1);
152
153 _gen.pushLoop();
154
155 out.println("Node " + _gen.getElement() + " = node;");
156 out.println("node = " + iter + ".nextNode();");
157
158 }
159 out.println("env.setCurrentNode(node);");
160
161
163
166 AbstractPattern oldNodeListContext = _gen.getNodeListContext();
167 _gen.setNodeListContext(parseMatch(_select));
168
169 generateChildren(out);
170
171 _gen.setNodeListContext(oldNodeListContext);
172
173
175 out.println("node = " + _gen.getElement() + ";");
176 out.println("env.setCurrentNode(" + oldCur + ");");
177
178 int selectDepth = _gen.getSelectDepth();
179
180 for (; selectDepth > oldSelectDepth; selectDepth--) {
181 out.popDepth();
182 out.println("}");
183 }
184 _gen.setSelectDepth(oldSelectDepth);
185
186 out.println("env.setExprEnv(" + oldEnv + ");");
187
188 if (! hasExprEnv) {
189 out.println("env.setSelect(" + oldCxt + ", " + oldSel + ");");
190 out.println("env.setContextSize(" + oldSize + ");");
191 }
193
194 out.popDepth();
195 out.println("}");
196
197 _gen.popLoop();
198 }
199
200
268
269 public void printForEachSort(JavaWriter out)
270 throws Exception
271 {
272 Sort []sort = new Sort[_sorts.size()];
273
274 for (int i = 0; i < _sorts.size(); i++)
275 sort[i] = _sorts.get(i).generateSort();
276
277 out.println("{");
278 out.pushDepth();
279
280 AbstractPattern select = parseSelect(_select);
281
282 boolean hasExprEnv = ! allowJavaSelect(select);
283
284 int id = _gen.generateId();
285
286 String sel = "_xsl_sel" + id;
287 String oldCxt = "_xsl_cxt" + id;
288 String oldCur = "_xsl_cur" + id;
289 String oldSel = "_xsl_old_sel" + id;
290 String oldEnv = "_xsl_env" + id;
291
292 out.println("env.setCurrentNode(node);");
293 String pos = "_xsl_pos" + _gen.generateId();
294 String list = "_xsl_list" + _gen.generateId();
295
296 int sortIndex = _gen.addSort(sort);
297
298 out.println("Node " + oldCxt + " = env.getContextNode();");
299 out.println("Node " + oldCur + " = env.getCurrentNode();");
300
301 out.println("ArrayList " + list +
302 " = xslSort(node, env" +
303 ", _select_patterns[" + _gen.addSelect(select) + "]" +
304 ", _xsl_sorts[" + sortIndex + "]);");
305 out.println("env.setContextSize(" + list + ".size());");
306 out.println("for (int " + pos + " = 1; " + pos +
307 " <= " + list + ".size(); " + pos + "++) {");
308 _gen.pushLoop();
309 out.pushDepth();
310 out.println("Node " + _gen.getElement() + " = node;");
311 out.println("node = (Node) " + list + ".get(" + pos + " - 1);");
312
313 String oldPos = _gen.getCurrentPosition();
314 _gen.setCurrentPosition(pos);
315
316 out.println("env.setPosition(" + pos + ");");
317
318 AbstractPattern oldNodeListContext = _gen.getNodeListContext();
319 _gen.setNodeListContext(parseMatch(_select));
320
321 generateChildren(out);
322
323 _gen.setCurrentPosition(oldPos);
324
325 _gen.setNodeListContext(oldNodeListContext);
326
327 out.println("node = " + _gen.getElement() + ";");
328
329 out.popDepth();
330 out.println("}");
331 _gen.popLoop();
332 out.popDepth();
333 out.println("}");
334 }
335 }
336 |
Popular Tags |
Java API By Example, From Geeks To Geeks.