1 /*
2  * Copyright (C) 2007 The Android Open Source Project
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 package com.android.dx.cf.attrib;
18 
19 import com.android.dx.cf.code.LocalVariableList;
20 import com.android.dx.util.MutabilityException;
21 
22 /**
23  * Base attribute class for standard {@code LocalVariableTable}
24  * and {@code LocalVariableTypeTable} attributes.
25  */
26 public abstract class BaseLocalVariables extends BaseAttribute {
27     /** {@code non-null;} list of local variable entries */
28     private final LocalVariableList localVariables;
29 
30     /**
31      * Constructs an instance.
32      *
33      * @param name {@code non-null;} attribute name
34      * @param localVariables {@code non-null;} list of local variable entries
35      */
BaseLocalVariables(String name, LocalVariableList localVariables)36     public BaseLocalVariables(String name,
37             LocalVariableList localVariables) {
38         super(name);
39 
40         try {
41             if (localVariables.isMutable()) {
42                 throw new MutabilityException("localVariables.isMutable()");
43             }
44         } catch (NullPointerException ex) {
45             // Translate the exception.
46             throw new NullPointerException("localVariables == null");
47         }
48 
49         this.localVariables = localVariables;
50     }
51 
52     /** {@inheritDoc} */
byteLength()53     public final int byteLength() {
54         return 8 + localVariables.size() * 10;
55     }
56 
57     /**
58      * Gets the list of "local variable" entries associated with this instance.
59      *
60      * @return {@code non-null;} the list
61      */
getLocalVariables()62     public final LocalVariableList getLocalVariables() {
63         return localVariables;
64     }
65 }
66