?? descriptorloader.java
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/* * Copyright (c) 2002-2003 by OpenSymphony * All rights reserved. */package com.opensymphony.workflow;import com.opensymphony.workflow.loader.*;import org.w3c.dom.Document;import org.w3c.dom.Element;import java.io.File;import java.io.FileInputStream;import java.net.URL;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;/** * User: Hani Suleiman (hani@formicary.net) * Date: Feb 12, 2003 * Time: 6:49:46 PM */public class DescriptorLoader { //~ Methods //////////////////////////////////////////////////////////////// public static WorkflowDescriptor getDescriptor(String url) throws Exception { File file = new File(new URL(url).getFile()); if (!file.exists()) { throw new IllegalArgumentException("file " + file + " does not exist"); } DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); dbf.setNamespaceAware(true); dbf.setValidating(true); DocumentBuilder db = dbf.newDocumentBuilder(); db.setEntityResolver(new DTDEntityResolver()); db.setErrorHandler(new WorkflowLoader.WorkflowErrorHandler(new URL(url))); Document doc = db.parse(new FileInputStream(file)); Element root = (Element) doc.getElementsByTagName("workflow").item(0); WorkflowDescriptor descriptor = DescriptorFactory.getFactory().createWorkflowDescriptor(root); return descriptor; }}
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