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1
30 package com.genimen.djeneric.tools.scriptengine.core.nodes;
31
32 import java.util.HashMap  ;
33 import java.util.List ;
34
35 import com.genimen.djeneric.language.Messages;
36 import com.genimen.djeneric.repository.DjList;
37 import com.genimen.djeneric.tools.scriptengine.core.DjScriptParserEngine;
38 import com.genimen.djeneric.tools.scriptengine.core.util.DjScriptCompileTimeScope;
39 import com.genimen.djeneric.tools.scriptengine.core.util.DjScriptExecutionException;
40 import com.genimen.djeneric.tools.scriptengine.core.util.DjScriptExecutionTimeScope;
41 import com.genimen.djeneric.tools.scriptengine.core.util.Variable;
42
43 public class ForNode extends SetNode
44 {
45 private boolean _ranged = false;
46
47 public ForNode(int i)
48 {
49 super(i);
50 }
51
52 public ForNode(DjScriptParserEngine p, int i)
53 {
54 super(p, i);
55 }
56
57 public String getName()
58 {
59 return "for";
60 }
61
62 public String toString()
63 {
64 return "for(" + getLoopVariable() + " in ...";
65 }
66
67 public void setLoopVariable(String loopVariable)
68 {
69 setSetName(loopVariable);
70 }
71
72 public String getLoopVariable()
73 {
74 return getSetName();
75 }
76
77 public void setBody(BodyNode body)
78 {
79 }
80
81 public boolean isRanged()
82 {
83 return _ranged;
84 }
85
86 public void setRanged(boolean ranged)
87 {
88 _ranged = ranged;
89 }
90
91 public void execute(DjScriptExecutionTimeScope context) throws DjScriptExecutionException
92 {
93 if (isRanged())
94 {
95 executeRanged(context);
96 }
97 else
98 {
99 executeSetBased(context);
100 }
101 }
102
103 public void executeSetBased(DjScriptExecutionTimeScope context) throws DjScriptExecutionException
104 {
105 String varName = getLoopVariable();
106 ValueExpression set = (ValueExpression) getChild(0);
107
108 Object o = set.getValue(context);
109 if (!(o instanceof DjList)) throw new DjScriptExecutionException(Messages.getString("ForNode.ExpressionNotASet"),
110 this);
111
112 DjList lst = (DjList) o;
113
114 if (lst.size() == 0) return;
115
116 BodyNode body = (BodyNode) getChild(BodyNode.class);
117 FilterNode filter = (FilterNode) getChild(FilterNode.class);
118 OrderByNode orderBy = (OrderByNode) getChild(OrderByNode.class);
119
120 if (body == null) return;
121
122 lst = processFilter(lst, context, filter);
123 processOrderBy(lst, orderBy);
124
125 context.mark();
126
127 Variable loopvar = context.getVariableStack().push(varName, lst.getDjenericObjectAt(0));
128
129 for (int i = 0; i < lst.size(); i++)
130 {
131 loopvar.setObject(lst.getDjenericObjectAt(i));
132 body.execute(context);
133 }
134
135 context.releaseToMark();
136 }
137
138 public void executeRanged(DjScriptExecutionTimeScope context) throws DjScriptExecutionException
139 {
140 context.mark();
141
142 String varName = getLoopVariable();
143 ValueExpression fromE = (ValueExpression) getChild(0);
144 ValueExpression toE = (ValueExpression) getChild(1);
145
146 BodyNode body = (BodyNode) getChild(BodyNode.class);
147
148 if (body == null) return;
149
150 int from = Integer.parseInt(String.valueOf(fromE.getValue(context)));
151 int to = Integer.parseInt(String.valueOf(toE.getValue(context)));
152
153 Variable loopvar = context.getVariableStack().push(varName, new Integer (0));
154
155 if (from < to)
156 {
157 for (int i = from; i <= to; i++)
158 {
159 loopvar.assign(new Integer (i), this);
160 body.execute(context);
161 }
162 }
163 else
164 {
165 for (int i = from; i >= to; i--)
166 {
167 loopvar.assign(new Integer (i), this);
168 body.execute(context);
169 }
170 }
171
172 context.releaseToMark();
173 }
174
175 public void validateScript(DjScriptCompileTimeScope ctxt) throws DjScriptExecutionException
176 {
177 ctxt.mark();
178
179 if (isRanged()) ctxt.pushVariable(new Variable(getLoopVariable(), null, Integer .class.getName()));
180 else
181 {
182 ValueExpression set = (ValueExpression) getChild(0);
183 ctxt.pushVariable(new Variable(getLoopVariable(), null, set.getValidatedTypeName(ctxt)));
184 }
185
186 BodyNode body = (BodyNode) getChild(BodyNode.class);
187 body.validateScript(ctxt);
188
189 ctxt.releaseToMark();
190 }
191
192 public void collectVariables(DjScriptCompileTimeScope ctxt, HashMap variables, int stopAtLine)
193 throws DjScriptExecutionException
194 {
195 if (stopAtLine >= 0 && getLine() > stopAtLine) return;
196 variables.put(getLoopVariable(), List .class.getName());
197 super.collectVariables(ctxt, variables, stopAtLine);
198 }
199
200 } |
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