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Java > Open Source Codes > com > sun > org > apache > xalan > internal > xsltc > compiler > NumberCall


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: NumberCall.java,v 1.6 2004/02/16 22:24:29 minchau Exp $
18  */
19
20 package com.sun.org.apache.xalan.internal.xsltc.compiler;
21
22 import java.util.Vector JavaDoc;
23
24 import com.sun.org.apache.bcel.internal.generic.InstructionList;
25 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
26 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
27 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
28 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
29
30 /**
31  * @author Jacek Ambroziak
32  * @author Santiago Pericas-Geertsen
33  */
34 final class NumberCall extends FunctionCall {
35
36     public NumberCall(QName fname, Vector JavaDoc arguments) {
37     super(fname, arguments);
38     }
39
40     public Type typeCheck(SymbolTable stable) throws TypeCheckError {
41     if (argumentCount() > 0) {
42         argument().typeCheck(stable);
43     }
44     return _type = Type.Real;
45     }
46
47     public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
48     final InstructionList il = methodGen.getInstructionList();
49     Type targ;
50     
51     if (argumentCount() == 0) {
52         il.append(methodGen.loadContextNode());
53         targ = Type.Node;
54     }
55     else {
56         final Expression arg = argument();
57         arg.translate(classGen, methodGen);
58         arg.startIterator(classGen, methodGen);
59         targ = arg.getType();
60     }
61
62     if (!targ.identicalTo(Type.Real)) {
63         targ.translateTo(classGen, methodGen, Type.Real);
64     }
65     }
66 }
67
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