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1 package com.genimen.djeneric.repository.oql.core.nodes;
2
3 import java.math.BigDecimal  ;
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
11 public class OperatorNode extends SimpleNode implements ValueExpression
12 {
13 private String operator;
14
15 public OperatorNode(int i)
16 {
17 super(i);
18 }
19
20 public OperatorNode(DjOqlParserEngine p, int i)
21 {
22 super(p, i);
23 }
24
25 public String getName()
26 {
27 return toString();
28 }
29
30 public String toString()
31 {
32 return getOperator() + " (op)";
33 }
34
35 public void setOperator(String operator)
36 {
37 this.operator = operator;
38 }
39
40 public String getOperator()
41 {
42 return operator;
43 }
44
45 public void translate(StringBuffer result, HashMap path2AliasMapping) throws ParseException
46 {
47 appendOpenBrackets(result);
48 getChild(0).translate(result, path2AliasMapping);
49 result.append(operator);
50 getChild(1).translate(result, path2AliasMapping);
51 appendCloseBrackets(result);
52 }
53
54 public Object getValue(MatchingContext context) throws MatchException
55 {
56 ValueExpression left = (ValueExpression) getChild(0);
57 ValueExpression right = (ValueExpression) getChild(1);
58
59 if (getOperator().equals("."))
61 {
62 Object leftVal = left.getValue(context);
63 if (!(right instanceof PropertyOrFunctionNode))
64 {
65 throw new MatchException("Can only apply . to a right side function", beginLine, beginColumn);
66 }
67 PropertyOrFunctionNode pof = (PropertyOrFunctionNode) right;
68 try
69 {
70 return pof.evalFunction(leftVal, context);
71 }
72 catch (Exception x)
73 {
74 throw new MatchException(x.getMessage(), beginLine, beginColumn);
75 }
76 }
77
78 Object leftVal = left.getValue(context);
79 Object rightVal = right.getValue(context);
80
81 if (leftVal == null || rightVal == null)
83 {
84 return null;
85 }
86
87 if ((leftVal instanceof String ) || (rightVal instanceof String ))
89 {
90 if (getOperator().equals("+")) return leftVal.toString() + rightVal.toString();
91 throw new MatchException("Can not apply " + getOperator() + " to strings", beginLine, beginColumn);
92 }
93
94 if ((leftVal instanceof BigDecimal ) || (rightVal instanceof BigDecimal ))
96 {
97 float l = toBigDecimal(leftVal).floatValue();
98 float r = toBigDecimal(rightVal).floatValue();
99
100 if (getOperator().equals("+")) return new Float (l + r);
101 if (getOperator().equals("-")) return new Float (l - r);
102 if (getOperator().equals("*")) return new Float (l * r);
103 if (getOperator().equals("/")) return new Float (l / r);
104 throw new MatchException("Can not apply " + getOperator() + " to floats", beginLine, beginColumn);
105 }
106 if ((leftVal instanceof Float ) || (rightVal instanceof Float ))
108 {
109 float l = toBigDecimal(leftVal).floatValue();
110 float r = toBigDecimal(rightVal).floatValue();
111
112 if (getOperator().equals("+")) return new Float (l + r);
113 if (getOperator().equals("-")) return new Float (l - r);
114 if (getOperator().equals("*")) return new Float (l * r);
115 if (getOperator().equals("/")) return new Float (l / r);
116 throw new MatchException("Can not apply " + getOperator() + " to floats", beginLine, beginColumn);
117 }
118 if ((leftVal instanceof Integer ) || (rightVal instanceof Integer ))
120 {
121 int l = toLong(leftVal).intValue();
122 int r = toLong(rightVal).intValue();
123
124 if (getOperator().equals("+")) return new Integer (l + r);
125 if (getOperator().equals("-")) return new Integer (l - r);
126 if (getOperator().equals("*")) return new Integer (l * r);
127 if (getOperator().equals("/")) return new Integer (l / r);
128 if (getOperator().equals("%")) return new Integer (l % r);
129 throw new MatchException("Can not apply " + getOperator() + " to integers", beginLine, beginColumn);
130 }
131 throw new MatchException("Can not apply " + classOnly(leftVal) + getOperator() + classOnly(rightVal), beginLine,
132 beginColumn);
133 }
134
135 } |
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