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Java > Open Source Codes > org > eclipse > jdt > internal > core > util > LocalVariableAttribute


1 /*******************************************************************************
2  * Copyright (c) 2000, 2006 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.core.util;
12
13 import org.eclipse.jdt.core.util.ClassFormatException;
14 import org.eclipse.jdt.core.util.IConstantPool;
15 import org.eclipse.jdt.core.util.ILocalVariableAttribute;
16 import org.eclipse.jdt.core.util.ILocalVariableTableEntry;
17
18 /**
19  * Default implementation of ILocalVariableAttribute.
20  */
21 public class LocalVariableAttribute
22     extends ClassFileAttribute
23     implements ILocalVariableAttribute {
24
25     private static final ILocalVariableTableEntry[] NO_ENTRIES = new ILocalVariableTableEntry[0];
26     private int localVariableTableLength;
27     private ILocalVariableTableEntry[] localVariableTable;
28     
29     /**
30      * Constructor for LocalVariableAttribute.
31      * @param classFileBytes
32      * @param constantPool
33      * @param offset
34      * @throws ClassFormatException
35      */
36     public LocalVariableAttribute(
37         byte[] classFileBytes,
38         IConstantPool constantPool,
39         int offset)
40         throws ClassFormatException {
41         super(classFileBytes, constantPool, offset);
42         final int length = u2At(classFileBytes, 6, offset);
43         this.localVariableTableLength = length;
44         if (length != 0) {
45             int readOffset = 8;
46             this.localVariableTable = new ILocalVariableTableEntry[length];
47             for (int i = 0; i < length; i++) {
48                 this.localVariableTable[i] = new LocalVariableTableEntry(classFileBytes, constantPool, offset + readOffset);
49                 readOffset += 10;
50             }
51         } else {
52             this.localVariableTable = NO_ENTRIES;
53         }
54     }
55     /**
56      * @see ILocalVariableAttribute#getLocalVariableTable()
57      */
58     public ILocalVariableTableEntry[] getLocalVariableTable() {
59         return this.localVariableTable;
60     }
61
62     /**
63      * @see ILocalVariableAttribute#getLocalVariableTableLength()
64      */
65     public int getLocalVariableTableLength() {
66         return this.localVariableTableLength;
67     }
68
69 }
70
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