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      1 /*
      2  * Copyright (C) 2011 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.dex;
     18 
     19 import com.android.dex.util.Unsigned;
     20 
     21 public final class FieldId implements Comparable<FieldId> {
     22     private final Dex dex;
     23     private final int declaringClassIndex;
     24     private final int typeIndex;
     25     private final int nameIndex;
     26 
     27     public FieldId(Dex dex, int declaringClassIndex, int typeIndex, int nameIndex) {
     28         this.dex = dex;
     29         this.declaringClassIndex = declaringClassIndex;
     30         this.typeIndex = typeIndex;
     31         this.nameIndex = nameIndex;
     32     }
     33 
     34     public int getDeclaringClassIndex() {
     35         return declaringClassIndex;
     36     }
     37 
     38     public int getTypeIndex() {
     39         return typeIndex;
     40     }
     41 
     42     public int getNameIndex() {
     43         return nameIndex;
     44     }
     45 
     46     public int compareTo(FieldId other) {
     47         if (declaringClassIndex != other.declaringClassIndex) {
     48             return Unsigned.compare(declaringClassIndex, other.declaringClassIndex);
     49         }
     50         if (nameIndex != other.nameIndex) {
     51             return Unsigned.compare(nameIndex, other.nameIndex);
     52         }
     53         return Unsigned.compare(typeIndex, other.typeIndex); // should always be 0
     54     }
     55 
     56     public void writeTo(Dex.Section out) {
     57         out.writeUnsignedShort(declaringClassIndex);
     58         out.writeUnsignedShort(typeIndex);
     59         out.writeInt(nameIndex);
     60     }
     61 
     62     @Override public String toString() {
     63         if (dex == null) {
     64             return declaringClassIndex + " " + typeIndex + " " + nameIndex;
     65         }
     66         return dex.typeNames().get(typeIndex) + "." + dex.strings().get(nameIndex);
     67     }
     68 }
     69