Andreas Gampe | 554d7ee | 2015-09-15 08:57:12 -0700 | [diff] [blame] | 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; |
| 18 | |
| 19 | import org.xml.sax.Attributes; |
| 20 | import org.xml.sax.InputSource; |
| 21 | import org.xml.sax.SAXException; |
| 22 | import org.xml.sax.XMLReader; |
| 23 | import org.xml.sax.helpers.DefaultHandler; |
| 24 | |
| 25 | import java.io.File; |
| 26 | import java.io.FileReader; |
| 27 | import java.text.DateFormat; |
| 28 | import java.util.Collection; |
| 29 | import java.util.Date; |
| 30 | import java.util.HashMap; |
| 31 | import java.util.LinkedList; |
| 32 | import java.util.Map; |
| 33 | |
| 34 | import javax.xml.parsers.SAXParser; |
| 35 | import javax.xml.parsers.SAXParserFactory; |
| 36 | |
| 37 | /** |
| 38 | * Helper class for serialization and deserialization of a collection of DumpData objects to XML. |
| 39 | */ |
| 40 | public class DumpDataIO { |
| 41 | |
| 42 | /** |
| 43 | * Serialize the given collection to an XML document. Returns the produced string. |
| 44 | */ |
| 45 | public static String serialize(Collection<DumpData> data) { |
| 46 | // We'll do this by hand, constructing a DOM or similar is too complicated for our simple |
| 47 | // use case. |
| 48 | |
| 49 | StringBuilder sb = new StringBuilder(); |
| 50 | sb.append("<preloaded-classes-data>\n"); |
| 51 | |
| 52 | for (DumpData d : data) { |
| 53 | serialize(d, sb); |
| 54 | } |
| 55 | |
| 56 | sb.append("</preloaded-classes-data>\n"); |
| 57 | return sb.toString(); |
| 58 | } |
| 59 | |
| 60 | private static void serialize(DumpData d, StringBuilder sb) { |
| 61 | sb.append("<data package=\"" + d.packageName + "\" date=\"" + |
| 62 | DateFormat.getDateTimeInstance().format(d.date) +"\">\n"); |
| 63 | |
| 64 | for (Map.Entry<String, String> e : d.dumpData.entrySet()) { |
| 65 | sb.append("<class name=\"" + e.getKey() + "\" classloader=\"" + e.getValue() + "\"/>\n"); |
| 66 | } |
| 67 | |
| 68 | sb.append("</data>\n"); |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * Load a collection of DumpData objects from the given file. |
| 73 | */ |
| 74 | public static Collection<DumpData> deserialize(File f) throws Exception { |
| 75 | // Use SAX parsing. Our format is very simple. Don't do any schema validation or such. |
| 76 | |
| 77 | SAXParserFactory spf = SAXParserFactory.newInstance(); |
| 78 | spf.setNamespaceAware(false); |
| 79 | SAXParser saxParser = spf.newSAXParser(); |
| 80 | |
| 81 | XMLReader xmlReader = saxParser.getXMLReader(); |
| 82 | DumpDataContentHandler ddch = new DumpDataContentHandler(); |
| 83 | xmlReader.setContentHandler(ddch); |
| 84 | xmlReader.parse(new InputSource(new FileReader(f))); |
| 85 | |
| 86 | return ddch.data; |
| 87 | } |
| 88 | |
| 89 | private static class DumpDataContentHandler extends DefaultHandler { |
| 90 | Collection<DumpData> data = new LinkedList<DumpData>(); |
| 91 | DumpData openData = null; |
| 92 | |
| 93 | @Override |
| 94 | public void startElement(String uri, String localName, String qName, Attributes attributes) |
| 95 | throws SAXException { |
| 96 | if (qName.equals("data")) { |
| 97 | if (openData != null) { |
| 98 | throw new IllegalStateException(); |
| 99 | } |
| 100 | String pkg = attributes.getValue("package"); |
| 101 | String dateString = attributes.getValue("date"); |
| 102 | |
| 103 | if (pkg == null || dateString == null) { |
| 104 | throw new IllegalArgumentException(); |
| 105 | } |
| 106 | |
| 107 | try { |
| 108 | Date date = DateFormat.getDateTimeInstance().parse(dateString); |
| 109 | openData = new DumpData(pkg, new HashMap<String, String>(), date); |
| 110 | } catch (Exception e) { |
| 111 | throw new RuntimeException(e); |
| 112 | } |
| 113 | } else if (qName.equals("class")) { |
| 114 | if (openData == null) { |
| 115 | throw new IllegalStateException(); |
| 116 | } |
| 117 | String className = attributes.getValue("name"); |
| 118 | String classLoader = attributes.getValue("classloader"); |
| 119 | |
| 120 | if (className == null || classLoader == null) { |
| 121 | throw new IllegalArgumentException(); |
| 122 | } |
| 123 | |
| 124 | openData.dumpData.put(className, classLoader.equals("null") ? null : classLoader); |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | @Override |
| 129 | public void endElement(String uri, String localName, String qName) throws SAXException { |
| 130 | if (qName.equals("data")) { |
| 131 | if (openData == null) { |
| 132 | throw new IllegalStateException(); |
| 133 | } |
| 134 | openData.countBootClassPath(); |
| 135 | |
| 136 | data.add(openData); |
| 137 | openData = null; |
| 138 | } |
| 139 | } |
| 140 | } |
| 141 | } |