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1
18 package org.objectweb.medor.expression.lib;
19
20 import org.objectweb.medor.expression.api.Expression;
21 import org.objectweb.medor.expression.api.Operand;
22 import org.objectweb.medor.expression.api.ParameterOperand;
23 import org.objectweb.medor.expression.api.ExpressionException;
24 import org.objectweb.medor.expression.api.MalformedExpressionException;
25 import org.objectweb.medor.expression.api.TypingException;
26 import org.objectweb.jorm.type.api.PTypeSpace;
27 import org.objectweb.jorm.type.api.PType;
28
29
33 public class StringLower extends BasicUnaryOperator {
34
35 public StringLower() {
36 super(PTypeSpace.STRING);
37 }
38 public StringLower(Expression strOperand) {
39 super(PTypeSpace.STRING, strOperand);
40 }
41
42 public String  getOperatorString() {
43 return STRING_UPPER;
44 }
45
46 public Operand evaluate(ParameterOperand[] pos, Object o)
47 throws ExpressionException {
48 if (expressions[0] == null) {
49 throw new MalformedExpressionException("Null children value");
50 }
51 if (result == null) {
52 throw new ExpressionException("Expression not compiled");
53 }
54 result.setValue(
55 evaluate(expressions[0].evaluate(pos, o).getString()));
56 return result;
57 }
58
59 public Operand compileExpression()
60 throws ExpressionException, MalformedExpressionException {
61 if (expressions[0] == null) {
62 throw new MalformedExpressionException("Null children value");
63 }
64 expressions[0].compileExpression();
65 PType opType = expressions[0].getType();
66 if (opType == null) {
67 throw new TypingException("Argument type not defined (null)");
68 }
69 if (opType.getTypeCode() != PType.TYPECODE_STRING) {
70 throw new TypingException("Bad Argument type, expected String, found: "
71 + expressions[0].getType().getJavaName());
72 }
73 result = new BasicVariableOperand(type);
74 verified = true;
75 return result;
76 }
77
78 public String evaluate(String str) {
79 return (str == null ? null : str.toLowerCase());
80 }
81 }
82 |
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