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      1 /*
      2  * Copyright (C) 2006 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.server.am;
     18 
     19 import android.content.IIntentReceiver;
     20 import android.content.IntentFilter;
     21 import android.os.Binder;
     22 import android.os.IBinder;
     23 import android.util.PrintWriterPrinter;
     24 import android.util.Printer;
     25 import android.util.proto.ProtoOutputStream;
     26 
     27 import com.android.server.IntentResolver;
     28 
     29 import java.io.PrintWriter;
     30 import java.util.ArrayList;
     31 
     32 /**
     33  * A receiver object that has registered for one or more broadcasts.
     34  * The ArrayList holds BroadcastFilter objects.
     35  */
     36 final class ReceiverList extends ArrayList<BroadcastFilter>
     37         implements IBinder.DeathRecipient {
     38     final ActivityManagerService owner;
     39     public final IIntentReceiver receiver;
     40     public final ProcessRecord app;
     41     public final int pid;
     42     public final int uid;
     43     public final int userId;
     44     BroadcastRecord curBroadcast = null;
     45     boolean linkedToDeath = false;
     46 
     47     String stringName;
     48 
     49     ReceiverList(ActivityManagerService _owner, ProcessRecord _app,
     50             int _pid, int _uid, int _userId, IIntentReceiver _receiver) {
     51         owner = _owner;
     52         receiver = _receiver;
     53         app = _app;
     54         pid = _pid;
     55         uid = _uid;
     56         userId = _userId;
     57     }
     58 
     59     // Want object identity, not the array identity we are inheriting.
     60     public boolean equals(Object o) {
     61         return this == o;
     62     }
     63     public int hashCode() {
     64         return System.identityHashCode(this);
     65     }
     66 
     67     public void binderDied() {
     68         linkedToDeath = false;
     69         owner.unregisterReceiver(receiver);
     70     }
     71 
     72     public boolean containsFilter(IntentFilter filter) {
     73         final int N = size();
     74         for (int i = 0; i < N; i++) {
     75             final BroadcastFilter f = get(i);
     76             if (IntentResolver.filterEquals(f, filter)) {
     77                 return true;
     78             }
     79         }
     80         return false;
     81     }
     82 
     83     void writeToProto(ProtoOutputStream proto, long fieldId) {
     84         long token = proto.start(fieldId);
     85         app.writeToProto(proto, ReceiverListProto.APP);
     86         proto.write(ReceiverListProto.PID, pid);
     87         proto.write(ReceiverListProto.UID, uid);
     88         proto.write(ReceiverListProto.USER, userId);
     89         if (curBroadcast != null) {
     90             curBroadcast.writeToProto(proto, ReceiverListProto.CURRENT);
     91         }
     92         proto.write(ReceiverListProto.LINKED_TO_DEATH, linkedToDeath);
     93         final int N = size();
     94         for (int i=0; i<N; i++) {
     95             BroadcastFilter bf = get(i);
     96             bf.writeToProto(proto, ReceiverListProto.FILTERS);
     97         }
     98         proto.write(ReceiverListProto.HEX_HASH, Integer.toHexString(System.identityHashCode(this)));
     99         proto.end(token);
    100     }
    101 
    102     void dumpLocal(PrintWriter pw, String prefix) {
    103         pw.print(prefix); pw.print("app="); pw.print(app != null ? app.toShortString() : null);
    104             pw.print(" pid="); pw.print(pid); pw.print(" uid="); pw.print(uid);
    105             pw.print(" user="); pw.println(userId);
    106         if (curBroadcast != null || linkedToDeath) {
    107             pw.print(prefix); pw.print("curBroadcast="); pw.print(curBroadcast);
    108                 pw.print(" linkedToDeath="); pw.println(linkedToDeath);
    109         }
    110     }
    111 
    112     void dump(PrintWriter pw, String prefix) {
    113         Printer pr = new PrintWriterPrinter(pw);
    114         dumpLocal(pw, prefix);
    115         String p2 = prefix + "  ";
    116         final int N = size();
    117         for (int i=0; i<N; i++) {
    118             BroadcastFilter bf = get(i);
    119             pw.print(prefix); pw.print("Filter #"); pw.print(i);
    120                     pw.print(": BroadcastFilter{");
    121                     pw.print(Integer.toHexString(System.identityHashCode(bf)));
    122                     pw.println('}');
    123             bf.dumpInReceiverList(pw, pr, p2);
    124         }
    125     }
    126 
    127     public String toString() {
    128         if (stringName != null) {
    129             return stringName;
    130         }
    131         StringBuilder sb = new StringBuilder(128);
    132         sb.append("ReceiverList{");
    133         sb.append(Integer.toHexString(System.identityHashCode(this)));
    134         sb.append(' ');
    135         sb.append(pid);
    136         sb.append(' ');
    137         sb.append((app != null ? app.processName : "(unknown name)"));
    138         sb.append('/');
    139         sb.append(uid);
    140         sb.append("/u");
    141         sb.append(userId);
    142         sb.append((receiver.asBinder() instanceof Binder) ? " local:" : " remote:");
    143         sb.append(Integer.toHexString(System.identityHashCode(receiver.asBinder())));
    144         sb.append('}');
    145         return stringName = sb.toString();
    146     }
    147 }
    148