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Java > Open Source Codes > org > apache > xalan > xsltc > compiler > RealExpr


1 /*
2  * Copyright 2001-2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 /*
17  * $Id: RealExpr.java,v 1.5 2004/02/16 22:24:28 minchau Exp $
18  */
19
20 package org.apache.xalan.xsltc.compiler;
21
22 import org.apache.bcel.generic.ConstantPoolGen;
23 import org.apache.bcel.generic.InstructionList;
24 import org.apache.bcel.generic.PUSH;
25 import org.apache.xalan.xsltc.compiler.util.ClassGenerator;
26 import org.apache.xalan.xsltc.compiler.util.MethodGenerator;
27 import org.apache.xalan.xsltc.compiler.util.Type;
28 import org.apache.xalan.xsltc.compiler.util.TypeCheckError;
29
30 /**
31  * @author Jacek Ambroziak
32  * @author Santiago Pericas-Geertsen
33  */
34 final class RealExpr extends Expression {
35     private double _value;
36
37     public RealExpr(double value) {
38     _value = value;
39     }
40
41     public Type typeCheck(SymbolTable stable) throws TypeCheckError {
42     return _type = Type.Real;
43     }
44
45     public String JavaDoc toString() {
46     return "real-expr(" + _value + ')';
47     }
48
49     public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
50     ConstantPoolGen cpg = classGen.getConstantPool();
51     InstructionList il = methodGen.getInstructionList();
52     il.append(new PUSH(cpg, _value));
53     }
54 }
55
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