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      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.preload.actions;
     18 
     19 import com.android.preload.DumpData;
     20 import com.android.preload.DumpTableModel;
     21 import com.android.preload.Main;
     22 
     23 import java.awt.event.ActionEvent;
     24 import java.io.File;
     25 import java.io.PrintWriter;
     26 import java.util.HashMap;
     27 import java.util.HashSet;
     28 import java.util.List;
     29 import java.util.Map;
     30 import java.util.Set;
     31 import java.util.TreeSet;
     32 import java.util.regex.Pattern;
     33 
     34 import javax.swing.AbstractAction;
     35 import javax.swing.JFileChooser;
     36 
     37 /**
     38  * Compute an intersection of classes from the given data. A class is in the intersection if it
     39  * appears in at least the number of threshold given packages. An optional blacklist can be
     40  * used to filter classes from the intersection.
     41  */
     42 public class ComputeThresholdAction extends AbstractAction implements Runnable {
     43     protected int threshold;
     44     private Pattern blacklist;
     45     private DumpTableModel dataTableModel;
     46 
     47     /**
     48      * Create an action with the given parameters. The blacklist is a regular expression
     49      * that filters classes.
     50      */
     51     public ComputeThresholdAction(String name, DumpTableModel dataTableModel, int threshold,
     52             String blacklist) {
     53         super(name);
     54         this.dataTableModel = dataTableModel;
     55         this.threshold = threshold;
     56         if (blacklist != null) {
     57             this.blacklist = Pattern.compile(blacklist);
     58         }
     59     }
     60 
     61     @Override
     62     public void actionPerformed(ActionEvent e) {
     63         List<DumpData> data = dataTableModel.getData();
     64         if (data.size() == 0) {
     65             Main.getUI().showMessageDialog("No data available, please scan packages or run "
     66                     + "monkeys.");
     67             return;
     68         }
     69         if (data.size() == 1) {
     70             Main.getUI().showMessageDialog("Cannot compute list from only one data set, please "
     71                     + "scan packages or run monkeys.");
     72             return;
     73         }
     74 
     75         new Thread(this).start();
     76     }
     77 
     78     @Override
     79     public void run() {
     80         Main.getUI().showWaitDialog();
     81 
     82         Map<String, Set<String>> uses = new HashMap<String, Set<String>>();
     83         for (DumpData d : dataTableModel.getData()) {
     84             Main.getUI().updateWaitDialog("Merging " + d.getPackageName());
     85             updateClassUse(d.getPackageName(), uses, getBootClassPathClasses(d.getDumpData()));
     86         }
     87 
     88         Main.getUI().updateWaitDialog("Computing thresholded set");
     89         Set<String> result = fromThreshold(uses, blacklist, threshold);
     90         Main.getUI().hideWaitDialog();
     91 
     92         boolean ret = Main.getUI().showConfirmDialog("Computed a set with " + result.size()
     93                 + " classes, would you like to save to disk?", "Save?");
     94         if (ret) {
     95             JFileChooser jfc = new JFileChooser();
     96             int ret2 = jfc.showSaveDialog(Main.getUI());
     97             if (ret2 == JFileChooser.APPROVE_OPTION) {
     98                 File f = jfc.getSelectedFile();
     99                 saveSet(result, f);
    100             }
    101         }
    102     }
    103 
    104     private Set<String> fromThreshold(Map<String, Set<String>> classUses, Pattern blacklist,
    105             int threshold) {
    106         TreeSet<String> ret = new TreeSet<>(); // TreeSet so it's nicely ordered by name.
    107 
    108         for (Map.Entry<String, Set<String>> e : classUses.entrySet()) {
    109             if (e.getValue().size() >= threshold) {
    110                 if (blacklist == null || !blacklist.matcher(e.getKey()).matches()) {
    111                     ret.add(e.getKey());
    112                 }
    113             }
    114         }
    115 
    116         return ret;
    117     }
    118 
    119     private static void updateClassUse(String pkg, Map<String, Set<String>> classUses,
    120             Set<String> classes) {
    121         for (String className : classes) {
    122             Set<String> old = classUses.get(className);
    123             if (old == null) {
    124                 classUses.put(className, new HashSet<String>());
    125             }
    126             classUses.get(className).add(pkg);
    127         }
    128     }
    129 
    130     private static Set<String> getBootClassPathClasses(Map<String, String> source) {
    131         Set<String> ret = new HashSet<>();
    132         for (Map.Entry<String, String> e : source.entrySet()) {
    133             if (e.getValue() == null) {
    134                 ret.add(e.getKey());
    135             }
    136         }
    137         return ret;
    138     }
    139 
    140     private static void saveSet(Set<String> result, File f) {
    141         try {
    142             PrintWriter out = new PrintWriter(f);
    143             for (String s : result) {
    144                 out.println(s);
    145             }
    146             out.close();
    147         } catch (Exception e) {
    148             e.printStackTrace();
    149         }
    150     }
    151 }