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14 package org.jacorb.trading.constraint;
15
16 import java.io.*;
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18
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20 public class SubstrNode extends ExprNode
21 {
22 private ExprNode m_left;
23 private ExprNode m_right;
24
25
26 private SubstrNode()
27 {
28 }
29
30
31 public SubstrNode(ExprNode left, ExprNode right)
32 {
33 m_left = left;
34 m_right = right;
35
36 setType(new ValueType(ValueType.BOOLEAN));
37 }
38
39
40 public void print(PrintStream ps)
41 {
42 ps.println("SubstrNode: type = " + getType());
43 ps.println("Left node:");
44 m_left.print(ps);
45 ps.println("Right node:");
46 m_right.print(ps);
47 }
48
49
50 public Value evaluate(PropertySource source)
51 throws MissingPropertyException
52 {
53 Value result = null;
54
55 int id = ValueType.promote(m_left.getType().getId(),
56 m_right.getType().getId());
57
58 Value v, left, right;
59 v = m_left.evaluate(source);
60 left = v.convert(id);
61 v = m_right.evaluate(source);
62 right = v.convert(id);
63
64 String  leftStr = (String )left.getValue();
65 String rightStr = (String )right.getValue();
66
67 result = ValueFactory.createBoolean(rightStr.indexOf(leftStr) >= 0);
68
69 return result;
70 }
71 }
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