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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.annotation.NonNull;
     20 
     21 import java.util.Objects;
     22 
     23 /** @hide */
     24 public final class ResourcesKey {
     25     private final String mResDir;
     26     private final float mScale;
     27     private final int mHash;
     28 
     29     public final int mDisplayId;
     30     @NonNull
     31     public final Configuration mOverrideConfiguration;
     32 
     33     public ResourcesKey(String resDir, int displayId, Configuration overrideConfiguration,
     34             float scale) {
     35         mResDir = resDir;
     36         mDisplayId = displayId;
     37         mOverrideConfiguration = overrideConfiguration != null
     38                 ? overrideConfiguration : Configuration.EMPTY;
     39         mScale = scale;
     40 
     41         int hash = 17;
     42         hash = 31 * hash + (mResDir == null ? 0 : mResDir.hashCode());
     43         hash = 31 * hash + mDisplayId;
     44         hash = 31 * hash + mOverrideConfiguration.hashCode();
     45         hash = 31 * hash + Float.floatToIntBits(mScale);
     46         mHash = hash;
     47     }
     48 
     49     public boolean hasOverrideConfiguration() {
     50         return !Configuration.EMPTY.equals(mOverrideConfiguration);
     51     }
     52 
     53     @Override
     54     public int hashCode() {
     55         return mHash;
     56     }
     57 
     58     @Override
     59     public boolean equals(Object obj) {
     60         if (!(obj instanceof ResourcesKey)) {
     61             return false;
     62         }
     63         ResourcesKey peer = (ResourcesKey) obj;
     64 
     65         if (!Objects.equals(mResDir, peer.mResDir)) {
     66             return false;
     67         }
     68         if (mDisplayId != peer.mDisplayId) {
     69             return false;
     70         }
     71         if (!mOverrideConfiguration.equals(peer.mOverrideConfiguration)) {
     72             return false;
     73         }
     74         if (mScale != peer.mScale) {
     75             return false;
     76         }
     77         return true;
     78     }
     79 
     80     @Override
     81     public String toString() {
     82         return Integer.toHexString(mHash);
     83     }
     84 }
     85