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1 package com.genimen.djeneric.repository.oql.core.nodes;
2
3 import java.util.ArrayList  ;
4 import java.util.HashMap ;
5
6 import com.genimen.djeneric.repository.oql.core.DjOqlParserEngine;
7 import com.genimen.djeneric.repository.oql.core.MatchException;
8 import com.genimen.djeneric.repository.oql.core.ParseException;
9 import com.genimen.djeneric.repository.oql.core.SimpleNode;
10 import com.genimen.djeneric.repository.oql.core.util.ObjectPath;
11
12 public class PropertyNode extends SimpleNode implements ValueExpression
13 {
14 private String _path;
15 private boolean negated = false;
16
17 public PropertyNode(int i)
18 {
19 super(i);
20 }
21
22 public PropertyNode(DjOqlParserEngine p, int i)
23 {
24 super(p, i);
25 }
26
27 public String getName()
28 {
29 return toString();
30 }
31
32 public String toString()
33 {
34 if (isNegated()) return "not " + _path;
35 return _path;
36 }
37
38 public void setPath(String path)
39 {
40 this._path = path;
41 }
42
43 public String getPath()
44 {
45 return _path;
46 }
47
48 public void setNegated(boolean negated)
49 {
50 this.negated = negated;
51 }
52
53 public boolean isNegated()
54 {
55 return negated;
56 }
57
58 public void translate(StringBuffer result, HashMap path2AliasMapping) throws ParseException
59 {
60 appendOpenBrackets(result);
61 if (isNegated()) result.append("not ");
62
63 String name = _path;
64 String path = "";
65
66 int idx = _path.lastIndexOf('.');
67 if (idx != -1)
68 {
69 path = _path.substring(0, idx);
70 name = _path.substring(idx + 1);
71 }
72
73 String alias = (String ) path2AliasMapping.get(path);
74 if (alias == null) throw new ParseException("Unmapped path encountered: " + path);
75 result.append(alias);
76 result.append(".");
77 result.append(name);
78 appendCloseBrackets(result);
79 }
80
81 public void addPaths(ArrayList allPaths)
82 {
83 if (!allPaths.contains(getPath())) allPaths.add(getPath());
84 }
85
86 public Object getValue(MatchingContext context) throws MatchException
87 {
88 try
89 {
90 if (negated)
91 {
92 Object o = ObjectPath.evaluateProperty(getPath(), context, this);
93 if (!(o instanceof Boolean )) throw new ParseException("Can not negate a non-boolean value", beginLine,
94 beginColumn);
95 Boolean b = (Boolean ) o;
96 return new Boolean (!b.booleanValue());
97 }
98 else return ObjectPath.evaluateProperty(getPath(), context, this);
99 }
100 catch (Exception x)
101 {
102 throw new MatchException(x, beginLine, beginColumn);
103 }
104 }
105 } |
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