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/*
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* JBind
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*
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* Copyright (c) by Stefan Wachter. All rights reserved.
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*
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* Usage, modification, and redistribution is subject to license terms that are
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* available at 'http://www.jbind.org'. The JBind license is like the
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* 'Apache Software License V 1.1'.
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*/
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package org.jbind.xml.facade;
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import java.net.MalformedURLException;
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import java.net.URL;
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import org.jbind.base.Console;
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import org.jbind.xml.code.IApplication;
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import org.jbind.xml.code.IApplicationCode;
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import org.jbind.xml.core.data.IAnyTypeData;
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import org.jbind.xml.core.data.IDataContext;
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import org.jbind.xml.msg.XmlException;
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import org.jbind.xml.msg.XmlMessages;
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import org.xml.sax.InputSource;
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public class ApplicationCode extends ConfigurationCode implements IApplicationCode {
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public ApplicationCode(URL aUrl, IDataContext aDataContext) {
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super(aUrl, aDataContext);
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}
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public ApplicationCode(InputSource anInputSource, IDataContext aDataContext) {
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super(anInputSource, aDataContext);
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}
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public IApplication getApplication() throws XmlException {
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IAnyTypeData code = getCode();
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if (!(code instanceof IApplication)) {
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throw new XmlException(XmlMessages.notAnApplicationInstance(getUrl(), code.getClass().getName(), IApplication.class.getName(), null));
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}
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return (IApplication)code;
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}
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/*
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* Template method that executes the application. The hook methods called in
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* this template method have reasonable default implementations.
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* The execution consists of the following steps:
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* <ol>
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* <li>Gets the application by calling the {@link #getApplication} method.</li>
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* <li>Setup the application by calling the method {@link #setup}.</li>
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* <li>Execute the application by calling the hook method {@link #doExecuteApplication}.</li>
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* <li>Tear down the application by calling the method {@link #tearDown}.</li>
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* <ol>
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*
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* @return The error code returned by the execute method of the application.
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* @throws XmlException raised if the application could not be instantiated
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* properly.
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*/
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public int execute() throws XmlException {
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IApplication app = getApplication();
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setup();
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int errorCode = doExecuteApplication(app);
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tearDown();
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return errorCode;
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}
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/**
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* Hook method for executing the application. The default implementation simply
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* calls the execute method of the application.
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*
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* @return The error code returned by the execute method of the application.
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*/
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protected int doExecuteApplication(IApplication anApplication) {
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return anApplication.execute();
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}
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private static void usage() {
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Console.err("usage:");
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Console.err("\tjava " + ApplicationCode.class.getName() + " -url <aUrl> [-nbLevels <int>]");
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Console.err("\t\t\turl : url of XML instance document that contains an application");
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Console.err("\t\t\tnbLevels: number of setup / tear down levels.");
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}
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/**
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* Executes an XML application.
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*
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* @param anArgs <i>(required)</i>. The recognized arguments are:
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* <ul>
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* <li>-url <aUrl> <i>(url of an XML instance document that contains an application)</i></li>
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* </ul>
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*/
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public static void main(String[] anArgs) {
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URL url = null;
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for (int i = 0; i < anArgs.length; i++) {
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String a = anArgs[i];
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if ("-url".equals(a)) {
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if (i + 1 == anArgs.length) {
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Console.err("Missing url");
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usage();
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System.exit(-1);
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}
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try {
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url = new URL(anArgs[++i]);
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} catch (MalformedURLException e) {
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Console.err("invalid url: " + anArgs[i]);
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usage();
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System.exit(-1);
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}
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} else {
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Console.err("unknown option: " + a);
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usage();
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System.exit(-1);
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}
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}
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if (null == url) {
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Console.err("missing url");
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usage();
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System.exit(-1);
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}
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ApplicationCode applicationCode = new ApplicationCode(url, null);
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try {
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int errorCode = applicationCode.execute();
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System.exit(errorCode);
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} catch (Exception e) {
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e.printStackTrace();
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System.exit(-1);
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}
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}
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}
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