「Commons Digester で XML to Java バインディング」ブログ用

FeedDigester.java

package com.zaneli.xml.bind;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;

import org.apache.commons.digester3.Digester;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

import com.zaneli.xml.model.Content;
import com.zaneli.xml.model.Entry;
import com.zaneli.xml.model.Feed;
import com.zaneli.xml.model.Link;
import com.zaneli.xml.model.Person;

public class FeedDigester {

	private static final Digester digester;

	static {
		digester = new Digester();
		// XML 名前空間をサポートするように指定
		digester.setNamespaceAware(true);
		
		// ルートのデフォルト名前空間を設定
		digester.setRuleNamespaceURI("http://www.w3.org/2005/Atom");
		digester.addObjectCreate("feed", Feed.class);
		
		digester.addObjectCreate("feed/entry", Entry.class);
		digester.addSetNext("feed/entry", "setEntry");
		
		digester.addObjectCreate("feed/entry/content", Content.class);
		digester.addSetNext("feed/entry/content", "setContent");
		// content の type 属性を Content クラスの type プロパティにセット
		digester.addSetProperties("feed/entry/content", "type", "type");
		
		// person のデフォルト名前空間を設定
		digester.setRuleNamespaceURI("http://ns.opensocial.org/2008/opensocial");
		digester.addObjectCreate("feed/entry/content/person", Person.class);
		digester.addSetNext("feed/entry/content/person", "setPerson");
		digester.addBeanPropertySetter("feed/entry/content/person/id");
		digester.addBeanPropertySetter("feed/entry/content/person/displayName");
		digester.addBeanPropertySetter("feed/entry/content/person/nickname");
		digester.addBeanPropertySetter("feed/entry/content/person/thumbnailUrl");
		digester.addBeanPropertySetter("feed/entry/content/person/lastLogin");
		digester.addBeanPropertySetter("feed/entry/content/person/userHash");
		digester.addBeanPropertySetter("feed/entry/content/person/platformUserId");
		
		// ルートのデフォルト名前空間を設定
		digester.setRuleNamespaceURI("http://www.w3.org/2005/Atom");
		digester.addBeanPropertySetter("feed/entry/title");
		digester.addBeanPropertySetter("feed/entry/updated");
		digester.addBeanPropertySetter("feed/entry/author");
		digester.addBeanPropertySetter("feed/entry/id");
		
		digester.addObjectCreate("feed/entry/link", Link.class);
		digester.addSetNext("feed/entry/link", "setLink");
		// link の 全属性を Link クラスの同名プロパティにセット
		digester.addSetProperties("feed/entry/link");
		
		// osearch プレフィックスの名前空間を設定
		digester.setRuleNamespaceURI("http://a9.com/-/spec/opensearch/1.1");
		digester.addBeanPropertySetter("feed/startIndex", "startIndex");
		digester.addBeanPropertySetter("feed/totalResults", "totalResults");
	}

	public Feed parse(InputStream in) throws IOException, SAXException {
		return digester.parse(in);
	}

	public Feed parse(File file) throws IOException, SAXException {
		return digester.parse(file);
	}

	public Feed parse(InputSource source) throws IOException, SAXException {
		return digester.parse(source);
	}

	public Feed parse(Reader reader) throws IOException, SAXException {
		return digester.parse(reader);
	}
}