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Java > Open Source Codes > org > eclipse > jdt > internal > debug > eval > ast > instructions > UnaryMinusOperator


1 /*******************************************************************************
2  * Copyright (c) 2000, 2005 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * IBM Corporation - initial API and implementation
10  *******************************************************************************/
11 package org.eclipse.jdt.internal.debug.eval.ast.instructions;
12
13 import org.eclipse.core.runtime.CoreException;
14 import org.eclipse.jdt.debug.core.IJavaPrimitiveValue;
15
16 public class UnaryMinusOperator extends UnaryOperator {
17
18     public UnaryMinusOperator(int expressionTypeId, int start) {
19         super(expressionTypeId, start);
20     }
21
22     /*
23      * @see Instruction#execute()
24      */
25     public void execute() throws CoreException {
26         IJavaPrimitiveValue value= (IJavaPrimitiveValue)popValue();
27         switch (fExpressionTypeId) {
28             case T_double:
29                 pushNewValue(-value.getDoubleValue());
30                 break;
31             case T_float:
32                 pushNewValue(-value.getFloatValue());
33                 break;
34             case T_long:
35                 pushNewValue(-value.getLongValue());
36                 break;
37             case T_byte:
38             case T_short:
39             case T_int:
40             case T_char:
41                 pushNewValue(-value.getIntValue());
42                 break;
43         }
44     }
45
46     /*
47      * @see Object#toString()
48      */
49     public String JavaDoc toString() {
50         return InstructionsEvaluationMessages.UnaryMinusOperator_unary_minus_operator_1;
51     }
52
53 }
54
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