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1 package com.genimen.djeneric.repository.oql.core.nodes;
2
3 import java.util.HashMap  ;
4
5 import com.genimen.djeneric.repository.oql.core.DjOqlParserEngine;
6 import com.genimen.djeneric.repository.oql.core.MatchException;
7 import com.genimen.djeneric.repository.oql.core.ParseException;
8 import com.genimen.djeneric.repository.oql.core.SimpleNode;
9
10 public class AndOrNode extends SimpleNode implements BooleanExpression, ValueExpression
11 {
12 private String _operator;
13
14 public AndOrNode(int i)
15 {
16 super(i);
17 }
18
19 public AndOrNode(DjOqlParserEngine 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 return getOperator();
32 }
33
34 public void setOperator(String operator)
35 {
36 if (operator.equals("and")) operator = "&&";
37 if (operator.equals("or")) operator = "||";
38
39 this._operator = operator;
40 }
41
42 public String getOperator()
43 {
44 return _operator;
45 }
46
47 public void translate(StringBuffer result, HashMap path2AliasMapping) throws ParseException
48 {
49 appendOpenBrackets(result);
50 getChild(0).translate(result, path2AliasMapping);
51
52 if (isAnd()) result.append("\nand ");
53 else if (isOr()) result.append("\nor ");
54 else throw new ParseException("Unsupported operator " + _operator);
55
56 getChild(1).translate(result, path2AliasMapping);
57 appendCloseBrackets(result);
58 }
59
60 private boolean isAnd()
61 {
62 return _operator.equals("&&");
63 }
64
65 private boolean isOr()
66 {
67 return _operator.equals("||");
68 }
69
70 public Object getValue(MatchingContext context) throws MatchException
71 {
72 return new Boolean (isTrue(context));
73 }
74
75 public boolean isTrue(MatchingContext context) throws MatchException
76 {
77 if (!(getChild(0) instanceof BooleanExpression))
78 {
79 throw new MatchException("Expression is not boolean", getChild(0).beginLine, getChild(0).beginColumn);
80 }
81 if (!(getChild(1) instanceof BooleanExpression))
82 {
83 throw new MatchException("Expression is not boolean", getChild(1).beginLine, getChild(1).beginColumn);
84 }
85
86 BooleanExpression left = (BooleanExpression) getChild(0);
87 BooleanExpression right = (BooleanExpression) getChild(1);
88
89 if (isAnd())
90 {
91 return left.isTrue(context) && right.isTrue(context);
92 }
93 else if (isOr())
94 {
95 return left.isTrue(context) || right.isTrue(context);
96 }
97 throw new MatchException("Unsupported operator: " + getOperator(), beginLine, beginColumn);
98 }
99
100 public boolean match(MatchingContext context) throws MatchException
101 {
102 return isTrue(context);
103 }
104
105 } |
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