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1 package com.genimen.djeneric.tools.generator.core.nodes;
2
3 import com.genimen.djeneric.tools.generator.core.DjentelParserEngine;
4 import com.genimen.djeneric.tools.generator.core.ParseException;
5 import com.genimen.djeneric.tools.generator.core.SimpleNode;
6 import com.genimen.djeneric.tools.generator.core.util.ObjectPath;
7 import com.genimen.djeneric.tools.generator.core.util.ParseContext;
8
9 public class PropertyNode extends SimpleNode implements ValueExpression
10 {
11 private String  path;
12 private boolean negated = false;
13
14 public PropertyNode(int i)
15 {
16 super(i);
17 }
18
19 public PropertyNode(DjentelParserEngine p, int i)
20 {
21 super(p, i);
22 }
23
24 public String getName()
25 {
26 return toString();
27 }
28
29 public String toString()
30 {
31 if (isNegated()) return "!" + path;
32 return path;
33 }
34
35 public void setPath(String path)
36 {
37 this.path = path;
38 }
39
40 public String getPath()
41 {
42 return path;
43 }
44
45 public void setNegated(boolean negated)
46 {
47 this.negated = negated;
48 }
49
50 public boolean isNegated()
51 {
52 return negated;
53 }
54
55 public Object getValue(ParseContext context) throws ParseException
56 {
57 try
58 {
59 if (negated)
60 {
61 Object o = ObjectPath.evaluateProperty(getPath(), context);
62 if (!(o instanceof Boolean )) throw new ParseException("Can not negate a non-boolean value", beginLine,
63 beginColumn);
64 Boolean b = (Boolean ) o;
65 return new Boolean (!b.booleanValue());
66 }
67 else return ObjectPath.evaluateProperty(getPath(), context);
68 }
69 catch (Exception x)
70 {
71 throw new ParseException(x, beginLine, beginColumn);
72 }
73 }
74 } |
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