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Java > Open Source Codes > org > apache > xalan > xsltc > compiler > util > NamedMethodGenerator


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: NamedMethodGenerator.java,v 1.7 2004/02/16 22:26:44 minchau Exp $
18  */
19
20 package org.apache.xalan.xsltc.compiler.util;
21
22 import org.apache.bcel.generic.ALOAD;
23 import org.apache.bcel.generic.ASTORE;
24 import org.apache.bcel.generic.ConstantPoolGen;
25 import org.apache.bcel.generic.Instruction;
26 import org.apache.bcel.generic.InstructionList;
27 import org.apache.bcel.generic.Type;
28
29 /**
30  * This class is used for named templates. Named template methods have access
31  * to the DOM, the current iterator, the handler and the current node.
32  * @author Jacek Ambroziak
33  * @author Santiago Pericas-Geertsen
34  */
35 public final class NamedMethodGenerator extends MethodGenerator {
36     protected static int CURRENT_INDEX = 4;
37     
38     // The index of the first parameter (after dom/iterator/handler/current)
39 private static final int PARAM_START_INDEX = 5;
40
41     public NamedMethodGenerator(int access_flags, Type return_type,
42                 Type[] arg_types, String JavaDoc[] arg_names,
43                 String JavaDoc method_name, String JavaDoc class_name,
44                 InstructionList il, ConstantPoolGen cp) {
45     super(access_flags, return_type, arg_types, arg_names, method_name,
46           class_name, il, cp);
47     }
48
49     public int getLocalIndex(String JavaDoc name) {
50     if (name.equals("current")) {
51         return CURRENT_INDEX;
52     }
53     return super.getLocalIndex(name);
54     }
55
56     public Instruction loadParameter(int index) {
57         return new ALOAD(index + PARAM_START_INDEX);
58     }
59     
60     public Instruction storeParameter(int index) {
61         return new ASTORE(index + PARAM_START_INDEX);
62     }
63 }
64
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