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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 import android.annotation.Nullable;
     21 import android.text.TextUtils;
     22 
     23 import java.util.Arrays;
     24 import java.util.Objects;
     25 
     26 /** @hide */
     27 public final class ResourcesKey {
     28     @Nullable
     29     public final String mResDir;
     30 
     31     @Nullable
     32     public final String[] mSplitResDirs;
     33 
     34     @Nullable
     35     public final String[] mOverlayDirs;
     36 
     37     @Nullable
     38     public final String[] mLibDirs;
     39 
     40     public final int mDisplayId;
     41 
     42     @NonNull
     43     public final Configuration mOverrideConfiguration;
     44 
     45     @NonNull
     46     public final CompatibilityInfo mCompatInfo;
     47 
     48     private final int mHash;
     49 
     50     public ResourcesKey(@Nullable String resDir,
     51                         @Nullable String[] splitResDirs,
     52                         @Nullable String[] overlayDirs,
     53                         @Nullable String[] libDirs,
     54                         int displayId,
     55                         @Nullable Configuration overrideConfig,
     56                         @Nullable CompatibilityInfo compatInfo) {
     57         mResDir = resDir;
     58         mSplitResDirs = splitResDirs;
     59         mOverlayDirs = overlayDirs;
     60         mLibDirs = libDirs;
     61         mDisplayId = displayId;
     62         mOverrideConfiguration = new Configuration(overrideConfig != null
     63                 ? overrideConfig : Configuration.EMPTY);
     64         mCompatInfo = compatInfo != null ? compatInfo : CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO;
     65 
     66         int hash = 17;
     67         hash = 31 * hash + Objects.hashCode(mResDir);
     68         hash = 31 * hash + Arrays.hashCode(mSplitResDirs);
     69         hash = 31 * hash + Arrays.hashCode(mOverlayDirs);
     70         hash = 31 * hash + Arrays.hashCode(mLibDirs);
     71         hash = 31 * hash + mDisplayId;
     72         hash = 31 * hash + Objects.hashCode(mOverrideConfiguration);
     73         hash = 31 * hash + Objects.hashCode(mCompatInfo);
     74         mHash = hash;
     75     }
     76 
     77     public boolean hasOverrideConfiguration() {
     78         return !Configuration.EMPTY.equals(mOverrideConfiguration);
     79     }
     80 
     81     public boolean isPathReferenced(String path) {
     82         if (mResDir != null && mResDir.startsWith(path)) {
     83             return true;
     84         } else {
     85             return anyStartsWith(mSplitResDirs, path) || anyStartsWith(mOverlayDirs, path)
     86                     || anyStartsWith(mLibDirs, path);
     87         }
     88     }
     89 
     90     private static boolean anyStartsWith(String[] list, String prefix) {
     91         if (list != null) {
     92             for (String s : list) {
     93                 if (s != null && s.startsWith(prefix)) {
     94                     return true;
     95                 }
     96             }
     97         }
     98         return false;
     99     }
    100 
    101     @Override
    102     public int hashCode() {
    103         return mHash;
    104     }
    105 
    106     @Override
    107     public boolean equals(Object obj) {
    108         if (!(obj instanceof ResourcesKey)) {
    109             return false;
    110         }
    111 
    112         ResourcesKey peer = (ResourcesKey) obj;
    113         if (mHash != peer.mHash) {
    114             // If the hashes don't match, the objects can't match.
    115             return false;
    116         }
    117 
    118         if (!Objects.equals(mResDir, peer.mResDir)) {
    119             return false;
    120         }
    121         if (!Arrays.equals(mSplitResDirs, peer.mSplitResDirs)) {
    122             return false;
    123         }
    124         if (!Arrays.equals(mOverlayDirs, peer.mOverlayDirs)) {
    125             return false;
    126         }
    127         if (!Arrays.equals(mLibDirs, peer.mLibDirs)) {
    128             return false;
    129         }
    130         if (mDisplayId != peer.mDisplayId) {
    131             return false;
    132         }
    133         if (!Objects.equals(mOverrideConfiguration, peer.mOverrideConfiguration)) {
    134             return false;
    135         }
    136         if (!Objects.equals(mCompatInfo, peer.mCompatInfo)) {
    137             return false;
    138         }
    139         return true;
    140     }
    141 
    142     @Override
    143     public String toString() {
    144         StringBuilder builder = new StringBuilder().append("ResourcesKey{");
    145         builder.append(" mHash=").append(Integer.toHexString(mHash));
    146         builder.append(" mResDir=").append(mResDir);
    147         builder.append(" mSplitDirs=[");
    148         if (mSplitResDirs != null) {
    149             builder.append(TextUtils.join(",", mSplitResDirs));
    150         }
    151         builder.append("]");
    152         builder.append(" mOverlayDirs=[");
    153         if (mOverlayDirs != null) {
    154             builder.append(TextUtils.join(",", mOverlayDirs));
    155         }
    156         builder.append("]");
    157         builder.append(" mLibDirs=[");
    158         if (mLibDirs != null) {
    159             builder.append(TextUtils.join(",", mLibDirs));
    160         }
    161         builder.append("]");
    162         builder.append(" mDisplayId=").append(mDisplayId);
    163         builder.append(" mOverrideConfig=").append(Configuration.resourceQualifierString(
    164                 mOverrideConfiguration));
    165         builder.append(" mCompatInfo=").append(mCompatInfo);
    166         builder.append("}");
    167         return builder.toString();
    168     }
    169 }
    170