android DLNA实现代码

/* * Copyright (C) 2011 Teleal GmbH, Switzerland * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation, either version 3 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.teleal.cling.support.contentdirectory; import org.teleal.cling.model.types.Datatype; import org.teleal.cling.model.types.InvalidValueException; import org.teleal.cling.support.model.DIDLAttribute; import org.teleal.cling.support.model.DIDLContent; import org.teleal.cling.support.model.DIDLObject; import org.teleal.cling.support.model.DescMeta; import org.teleal.cling.support.model.Person; import org.teleal.cling.support.model.PersonWithRole; import org.teleal.cling.support.model.ProtocolInfo; import org.teleal.cling.support.model.Res; import org.teleal.cling.support.model.StorageMedium; import org.teleal.cling.support.model.WriteStatus; import org.teleal.cling.support.model.container.Container; import org.teleal.cling.support.model.item.Item; import org.teleal.common.io.IO; import org.teleal.common.util.Exceptions; import org.teleal.common.xml.SAXParser; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import org.xml.sax.Attributes; import org.xml.sax.InputSource; import org.xml.sax.SAXException; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.transform.OutputKeys; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerFactory; import javax.xml.transform.dom.DOMSource; import javax.xml.transform.stream.StreamResult; import java.io.InputStream; import java.io.StringReader; import java.io.StringWriter; import java.net.URI; import java.util.logging.Level; import java.util.logging.Logger; import static org.teleal.cling.model.XMLUtil.appendNewElement; import static org.teleal.cling.model.XMLUtil.appendNewElementIfNotNull; /** * DIDL parser based on SAX for reading and DOM for writing. * <p> * This parser requires Android platform level 8 (2.2). * </p> * <p> * Override the {@link #createDescMetaHandler(org.teleal.cling.support.model.DescMeta, org.teleal.common.xml.SAXParser.Handler)} * method to read vendor extension content of {@code <desc>} elements. You then should also override the * {@link #populateDescMetadata(org.w3c.dom.Element, org.teleal.cling.support.model.DescMeta)} method for writing. * </p> * <p> * Override the {@link #createItemHandler(org.teleal.cling.support.model.item.Item, org.teleal.common.xml.SAXParser.Handler)} * etc. methods to register custom handlers for vendor-specific elements and attributes within items, containers, * and so on. * </p> * * @author Christian Bauer * @author Mario Franco */ public class DIDLParser extends SAXParser { final private static Logger log = Logger.getLogger(DIDLParser.class.getName()); /** * Uses the current thread's context classloader to read and unmarshall the given resource. * * @param resource The resource on the classpath. * @return The unmarshalled DIDL content model. * @throws Exception */ public DIDLContent parseResource(String resource) throws Exception { InputStream is = null; try { is = Thread.currentThread().getContextClassLoader().getResourceAsStream(resource); return parse(IO.readLines(is)); } finally { if (is != null) is.close(); } } /** * Reads and unmarshalls an XML representation into a DIDL content model. * * @param xml The XML representation. * @return A DIDL content model. * @throws Exception */ public DIDLContent parse(String xml) throws Exception { if (xml == null || xml.length() == 0) { throw new RuntimeException("Null or empty XML"); } DIDLContent content = new DIDLContent(); createRootHandler(content, this); log.fine("Parsing DIDL XML content"); parse(new InputSource(new StringReader(xml))); return content; } protected RootHandler createRootHandler(DIDLContent instance, SAXParser parser) { return new RootHandler(instance, parser); } protected ContainerHandler createContainerHandler(Container instance, Handler parent) { return new ContainerHandler(instance, parent); } protected ItemHandler createItemHandler(Item instance, Handler parent) { return new ItemHandler(instance, parent); } protected ResHandler createResHandler(Res instance, Handler parent) { return new ResHandler(instance, parent); } protected DescMetaHandler createDescMetaHandler(DescMeta instance, Handler parent) { return new DescMetaHandler(instance, parent); } protected Container createContainer(Attributes attributes) { Container container = new Container(); container.setId(attributes.getValue("id")); container.setParentID(attributes.getValue("parentID")); if ((attributes.getValue("childCount") != null)) container.setChildCount(Integer.valueOf(attributes.getValue("childCount"))); try { Boolean value = (Boolean)Datatype.Builtin.BOOLEAN.getDatatype().valueOf( attributes.getValue("restricted") ); if (value != null) container.setRestricted(value); value = (Boolean)Datatype.Builtin.BOOLEAN.getDatatype().valueOf( attributes.getValue("searchable") ); if (value != null) container.setSearchable(value); } catch (Exception ex) { // Ignore } return container; } protected Item createItem(Attributes attributes) { Item item = new Item(); item.setId(attributes.getValue("id")); item.setParentID(attributes.getValue("parentID")); try { Boolean value = (Boolean)Datatype.Builtin.BOOLEAN.getDatatype().valueOf( attributes.getValue("restricted") ); if (value != null) item.setRestricted(value); } catch (Exception ex) { // Ignore } if ((attributes.getValue("refID") != null)) item.setRefID(attributes.getValue("refID")); return item; } protected Res createResource(Attributes attributes) { Res res = new Res(); if (attributes.getValue("importUri") != null) res.setImportUri(URI.create(attributes.getValue("importUri"))); try { res.setProtocolInfo( new ProtocolInfo(attributes.getValue("protocolInfo")) ); } catch (InvalidValueException ex) { log.warning("In DIDL content, invalid resource protocol info: " + Exceptions.unwrap(ex)); return null; } if (attributes.getValue("size") != null) res.setSize(Long.valueOf(attributes.getValue("size"))); if (attributes.getValue("duration") != null) res.setDuration(attributes.getValue("duration")); if (attributes.getValue("bitrate") != null) res.setBitrate(Long.valueOf(attributes.getValue("bitrate"))); if (attributes.getValue("sampleFrequency") != null) res.setSampleFrequency(Long.valueOf(attributes.getValue("sampleFrequency"))); if (attributes.getValue("bitsPerSample") != null) res.setBitsPerSample(Long.valueOf(attrib