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      1 /*
      2  * Copyright (C) 2013 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 android.content.res;
     18 
     19 import android.os.IBinder;
     20 
     21 /** @hide */
     22 public final class ResourcesKey {
     23     final String mResDir;
     24     final float mScale;
     25     private final int mHash;
     26     private final IBinder mToken;
     27 
     28     public final int mDisplayId;
     29     public final Configuration mOverrideConfiguration = new Configuration();
     30 
     31     public ResourcesKey(String resDir, int displayId, Configuration overrideConfiguration,
     32             float scale, IBinder token) {
     33         mResDir = resDir;
     34         mDisplayId = displayId;
     35         if (overrideConfiguration != null) {
     36             mOverrideConfiguration.setTo(overrideConfiguration);
     37         }
     38         mScale = scale;
     39         mToken = token;
     40 
     41         int hash = 17;
     42         hash = 31 * hash + (mResDir == null ? 0 : mResDir.hashCode());
     43         hash = 31 * hash + mDisplayId;
     44         hash = 31 * hash + (mOverrideConfiguration != null
     45                 ? mOverrideConfiguration.hashCode() : 0);
     46         hash = 31 * hash + Float.floatToIntBits(mScale);
     47         mHash = hash;
     48     }
     49 
     50     public boolean hasOverrideConfiguration() {
     51         return !Configuration.EMPTY.equals(mOverrideConfiguration);
     52     }
     53 
     54     @Override
     55     public int hashCode() {
     56         return mHash;
     57     }
     58 
     59     @Override
     60     public boolean equals(Object obj) {
     61         if (!(obj instanceof ResourcesKey)) {
     62             return false;
     63         }
     64         ResourcesKey peer = (ResourcesKey) obj;
     65 
     66         if ((mResDir == null) && (peer.mResDir != null)) {
     67             return false;
     68         }
     69         if ((mResDir != null) && (peer.mResDir == null)) {
     70             return false;
     71         }
     72         if ((mResDir != null) && (peer.mResDir != null)) {
     73             if (!mResDir.equals(peer.mResDir)) {
     74                 return false;
     75             }
     76         }
     77         if (mDisplayId != peer.mDisplayId) {
     78             return false;
     79         }
     80         if (mOverrideConfiguration != peer.mOverrideConfiguration) {
     81             if (mOverrideConfiguration == null || peer.mOverrideConfiguration == null) {
     82                 return false;
     83             }
     84             if (!mOverrideConfiguration.equals(peer.mOverrideConfiguration)) {
     85                 return false;
     86             }
     87         }
     88         if (mScale != peer.mScale) {
     89             return false;
     90         }
     91         return true;
     92     }
     93 
     94     @Override
     95     public String toString() {
     96         return Integer.toHexString(mHash);
     97     }
     98 }
     99