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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 = overrideConfig != null ? overrideConfig : Configuration.EMPTY;
     63         mCompatInfo = compatInfo != null ? compatInfo : CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO;
     64 
     65         int hash = 17;
     66         hash = 31 * hash + Objects.hashCode(mResDir);
     67         hash = 31 * hash + Arrays.hashCode(mSplitResDirs);
     68         hash = 31 * hash + Arrays.hashCode(mOverlayDirs);
     69         hash = 31 * hash + Arrays.hashCode(mLibDirs);
     70         hash = 31 * hash + mDisplayId;
     71         hash = 31 * hash + Objects.hashCode(mOverrideConfiguration);
     72         hash = 31 * hash + Objects.hashCode(mCompatInfo);
     73         mHash = hash;
     74     }
     75 
     76     public boolean hasOverrideConfiguration() {
     77         return !Configuration.EMPTY.equals(mOverrideConfiguration);
     78     }
     79 
     80     public boolean isPathReferenced(String path) {
     81         if (mResDir != null && mResDir.startsWith(path)) {
     82             return true;
     83         } else {
     84             return anyStartsWith(mSplitResDirs, path) || anyStartsWith(mOverlayDirs, path)
     85                     || anyStartsWith(mLibDirs, path);
     86         }
     87     }
     88 
     89     private static boolean anyStartsWith(String[] list, String prefix) {
     90         if (list != null) {
     91             for (String s : list) {
     92                 if (s != null && s.startsWith(prefix)) {
     93                     return true;
     94                 }
     95             }
     96         }
     97         return false;
     98     }
     99 
    100     @Override
    101     public int hashCode() {
    102         return mHash;
    103     }
    104 
    105     @Override
    106     public boolean equals(Object obj) {
    107         if (!(obj instanceof ResourcesKey)) {
    108             return false;
    109         }
    110 
    111         ResourcesKey peer = (ResourcesKey) obj;
    112         if (mHash != peer.mHash) {
    113             // If the hashes don't match, the objects can't match.
    114             return false;
    115         }
    116 
    117         if (!Objects.equals(mResDir, peer.mResDir)) {
    118             return false;
    119         }
    120         if (!Arrays.equals(mSplitResDirs, peer.mSplitResDirs)) {
    121             return false;
    122         }
    123         if (!Arrays.equals(mOverlayDirs, peer.mOverlayDirs)) {
    124             return false;
    125         }
    126         if (!Arrays.equals(mLibDirs, peer.mLibDirs)) {
    127             return false;
    128         }
    129         if (mDisplayId != peer.mDisplayId) {
    130             return false;
    131         }
    132         if (!Objects.equals(mOverrideConfiguration, peer.mOverrideConfiguration)) {
    133             return false;
    134         }
    135         if (!Objects.equals(mCompatInfo, peer.mCompatInfo)) {
    136             return false;
    137         }
    138         return true;
    139     }
    140 
    141     @Override
    142     public String toString() {
    143         StringBuilder builder = new StringBuilder().append("ResourcesKey{");
    144         builder.append(" mHash=").append(Integer.toHexString(mHash));
    145         builder.append(" mResDir=").append(mResDir);
    146         builder.append(" mSplitDirs=[");
    147         if (mSplitResDirs != null) {
    148             builder.append(TextUtils.join(",", mSplitResDirs));
    149         }
    150         builder.append("]");
    151         builder.append(" mOverlayDirs=[");
    152         if (mOverlayDirs != null) {
    153             builder.append(TextUtils.join(",", mOverlayDirs));
    154         }
    155         builder.append("]");
    156         builder.append(" mLibDirs=[");
    157         if (mLibDirs != null) {
    158             builder.append(TextUtils.join(",", mLibDirs));
    159         }
    160         builder.append("]");
    161         builder.append(" mDisplayId=").append(mDisplayId);
    162         builder.append(" mOverrideConfig=").append(Configuration.resourceQualifierString(
    163                 mOverrideConfiguration));
    164         builder.append(" mCompatInfo=").append(mCompatInfo);
    165         builder.append("}");
    166         return builder.toString();
    167     }
    168 }
    169