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


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: BooleanCall.java,v 1.7 2004/02/16 22:24:29 minchau Exp $
18  */
19
20 package org.apache.xalan.xsltc.compiler;
21
22 import java.util.Vector JavaDoc;
23
24 import org.apache.xalan.xsltc.compiler.util.ClassGenerator;
25 import org.apache.xalan.xsltc.compiler.util.MethodGenerator;
26 import org.apache.xalan.xsltc.compiler.util.Type;
27 import org.apache.xalan.xsltc.compiler.util.TypeCheckError;
28
29 /**
30  * @author Jacek Ambroziak
31  * @author Santiago Pericas-Geertsen
32  */
33 final class BooleanCall extends FunctionCall {
34
35     private Expression _arg = null;
36
37     public BooleanCall(QName fname, Vector JavaDoc arguments) {
38     super(fname, arguments);
39     _arg = argument(0);
40     }
41
42     public Type typeCheck(SymbolTable stable) throws TypeCheckError {
43     _arg.typeCheck(stable);
44     return _type = Type.Boolean;
45     }
46
47     public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
48     _arg.translate(classGen, methodGen);
49     final Type targ = _arg.getType();
50     if (!targ.identicalTo(Type.Boolean)) {
51         _arg.startIterator(classGen, methodGen);
52         targ.translateTo(classGen, methodGen, Type.Boolean);
53     }
54     }
55 }
56
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