1 /*
2  * Copyright (C) 2015 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.ahat;
18 
19 import com.android.ahat.heapdump.AhatHeap;
20 import com.android.ahat.heapdump.AhatInstance;
21 import com.android.ahat.heapdump.AhatSnapshot;
22 import com.android.ahat.heapdump.Sort;
23 import java.util.ArrayList;
24 import java.util.Collection;
25 import java.util.Collections;
26 import java.util.List;
27 
28 /**
29  * Class for rendering a list of instances dominated by a single instance in a
30  * pretty way.
31  */
32 class DominatedList {
33   /**
34    * Render a table to the given HtmlWriter showing a pretty list of
35    * instances.
36    *
37    * @param snapshot  the snapshot where the instances reside
38    * @param doc       the document to render the dominated list to
39    * @param query     the current page query
40    * @param id        a unique identifier to use for the dominated list in the current page
41    * @param instances the collection of instances to generate a list for
42    */
render(final AhatSnapshot snapshot, Doc doc, Query query, String id, Collection<AhatInstance> instances)43   public static void render(final AhatSnapshot snapshot,
44       Doc doc, Query query, String id, Collection<AhatInstance> instances) {
45     List<AhatInstance> insts = new ArrayList<AhatInstance>(instances);
46     Collections.sort(insts, Sort.defaultInstanceCompare(snapshot));
47     HeapTable.render(doc, query, id, new TableConfig(), snapshot, insts);
48   }
49 
50   private static class TableConfig implements HeapTable.TableConfig<AhatInstance> {
51     @Override
getHeapsDescription()52     public String getHeapsDescription() {
53       return "Bytes Retained by Heap";
54     }
55 
56     @Override
getSize(AhatInstance element, AhatHeap heap)57     public long getSize(AhatInstance element, AhatHeap heap) {
58       return element.getRetainedSize(heap).getSize();
59     }
60 
61     @Override
getValueConfigs()62     public List<HeapTable.ValueConfig<AhatInstance>> getValueConfigs() {
63       HeapTable.ValueConfig<AhatInstance> value = new HeapTable.ValueConfig<AhatInstance>() {
64         public String getDescription() {
65           return "Object";
66         }
67 
68         public DocString render(AhatInstance element) {
69           return Summarizer.summarize(element);
70         }
71       };
72       return Collections.singletonList(value);
73     }
74   }
75 }
76