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      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.rop.cst.CstString;
     20 
     21 /**
     22  * Attribute class for standard {@code SourceDebugExtension} attributes.
     23  */
     24 public final class AttSourceDebugExtension extends BaseAttribute {
     25     /** {@code non-null;} attribute name for attributes of this type */
     26     public static final String ATTRIBUTE_NAME = "SourceDebugExtension";
     27 
     28     /** {@code non-null;} Contents of SMAP */
     29     private final CstString smapString;
     30 
     31     /**
     32      * Constructs an instance.
     33      *
     34      * @param smapString {@code non-null;} the SMAP data from the class file.
     35      */
     36     public AttSourceDebugExtension(CstString smapString) {
     37         super(ATTRIBUTE_NAME);
     38 
     39         if (smapString == null) {
     40             throw new NullPointerException("smapString == null");
     41         }
     42 
     43         this.smapString = smapString;
     44     }
     45 
     46     /** {@inheritDoc} */
     47     @Override
     48     public int byteLength() {
     49         // Add 6 for the standard attribute header: the attribute name
     50         // index (2 bytes) and the attribute length (4 bytes).
     51         return 6 + smapString.getUtf8Size();
     52     }
     53 
     54     /**
     55      * Gets the SMAP data of this instance.
     56      *
     57      * @return {@code non-null;} the SMAP data.
     58      */
     59     public CstString getSmapString() {
     60         return smapString;
     61     }
     62 }
     63