| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.preload; |
| |
| import org.xml.sax.Attributes; |
| import org.xml.sax.InputSource; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.XMLReader; |
| import org.xml.sax.helpers.DefaultHandler; |
| |
| import java.io.File; |
| import java.io.FileReader; |
| import java.text.DateFormat; |
| import java.util.Collection; |
| import java.util.Date; |
| import java.util.HashMap; |
| import java.util.LinkedList; |
| import java.util.Map; |
| |
| import javax.xml.parsers.SAXParser; |
| import javax.xml.parsers.SAXParserFactory; |
| |
| /** |
| * Helper class for serialization and deserialization of a collection of DumpData objects to XML. |
| */ |
| public class DumpDataIO { |
| |
| /** |
| * Serialize the given collection to an XML document. Returns the produced string. |
| */ |
| public static String serialize(Collection<DumpData> data) { |
| // We'll do this by hand, constructing a DOM or similar is too complicated for our simple |
| // use case. |
| |
| StringBuilder sb = new StringBuilder(); |
| sb.append("<preloaded-classes-data>\n"); |
| |
| for (DumpData d : data) { |
| serialize(d, sb); |
| } |
| |
| sb.append("</preloaded-classes-data>\n"); |
| return sb.toString(); |
| } |
| |
| private static void serialize(DumpData d, StringBuilder sb) { |
| sb.append("<data package=\"" + d.packageName + "\" date=\"" + |
| DateFormat.getDateTimeInstance().format(d.date) +"\">\n"); |
| |
| for (Map.Entry<String, String> e : d.dumpData.entrySet()) { |
| sb.append("<class name=\"" + e.getKey() + "\" classloader=\"" + e.getValue() + "\"/>\n"); |
| } |
| |
| sb.append("</data>\n"); |
| } |
| |
| /** |
| * Load a collection of DumpData objects from the given file. |
| */ |
| public static Collection<DumpData> deserialize(File f) throws Exception { |
| // Use SAX parsing. Our format is very simple. Don't do any schema validation or such. |
| |
| SAXParserFactory spf = SAXParserFactory.newInstance(); |
| spf.setNamespaceAware(false); |
| SAXParser saxParser = spf.newSAXParser(); |
| |
| XMLReader xmlReader = saxParser.getXMLReader(); |
| DumpDataContentHandler ddch = new DumpDataContentHandler(); |
| xmlReader.setContentHandler(ddch); |
| xmlReader.parse(new InputSource(new FileReader(f))); |
| |
| return ddch.data; |
| } |
| |
| private static class DumpDataContentHandler extends DefaultHandler { |
| Collection<DumpData> data = new LinkedList<DumpData>(); |
| DumpData openData = null; |
| |
| @Override |
| public void startElement(String uri, String localName, String qName, Attributes attributes) |
| throws SAXException { |
| if (qName.equals("data")) { |
| if (openData != null) { |
| throw new IllegalStateException(); |
| } |
| String pkg = attributes.getValue("package"); |
| String dateString = attributes.getValue("date"); |
| |
| if (pkg == null || dateString == null) { |
| throw new IllegalArgumentException(); |
| } |
| |
| try { |
| Date date = DateFormat.getDateTimeInstance().parse(dateString); |
| openData = new DumpData(pkg, new HashMap<String, String>(), date); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } else if (qName.equals("class")) { |
| if (openData == null) { |
| throw new IllegalStateException(); |
| } |
| String className = attributes.getValue("name"); |
| String classLoader = attributes.getValue("classloader"); |
| |
| if (className == null || classLoader == null) { |
| throw new IllegalArgumentException(); |
| } |
| |
| openData.dumpData.put(className, classLoader.equals("null") ? null : classLoader); |
| } |
| } |
| |
| @Override |
| public void endElement(String uri, String localName, String qName) throws SAXException { |
| if (qName.equals("data")) { |
| if (openData == null) { |
| throw new IllegalStateException(); |
| } |
| openData.countBootClassPath(); |
| |
| data.add(openData); |
| openData = null; |
| } |
| } |
| } |
| } |