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Java > Open Source Codes > org > eclipse > debug > internal > ui > sourcelookup > WorkingSetSourceContainerType


1 /*******************************************************************************
2  * Copyright (c) 2003, 2005 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * IBM Corporation - initial API and implementation
10  *******************************************************************************/
11 package org.eclipse.debug.internal.ui.sourcelookup;
12
13 import java.io.IOException JavaDoc;
14 import java.io.StringReader JavaDoc;
15
16 import javax.xml.parsers.DocumentBuilder JavaDoc;
17 import javax.xml.parsers.DocumentBuilderFactory JavaDoc;
18 import javax.xml.parsers.ParserConfigurationException JavaDoc;
19
20 import org.eclipse.core.runtime.CoreException;
21 import org.eclipse.debug.core.sourcelookup.ISourceContainer;
22 import org.eclipse.debug.core.sourcelookup.containers.AbstractSourceContainerTypeDelegate;
23 import org.eclipse.debug.ui.sourcelookup.WorkingSetSourceContainer;
24 import org.eclipse.ui.IWorkingSet;
25 import org.eclipse.ui.PlatformUI;
26 import org.w3c.dom.Document JavaDoc;
27 import org.w3c.dom.Element JavaDoc;
28 import org.xml.sax.InputSource JavaDoc;
29 import org.xml.sax.SAXException JavaDoc;
30 import org.xml.sax.helpers.DefaultHandler JavaDoc;
31
32 /**
33  * The factory for creating/restoring working set source containers.
34  *
35  * @since 3.0
36  */
37 public class WorkingSetSourceContainerType extends AbstractSourceContainerTypeDelegate {
38     /* (non-Javadoc)
39      * @see org.eclipse.debug.internal.core.sourcelookup.ISourceContainerTypeDelegate#getMemento(org.eclipse.debug.internal.core.sourcelookup.ISourceContainer)
40      */
41     public String JavaDoc getMemento(ISourceContainer container) throws CoreException {
42         WorkingSetSourceContainer workingSet = (WorkingSetSourceContainer) container;
43         Document JavaDoc doc = newDocument();
44         Element JavaDoc node = doc.createElement("workingSet"); //$NON-NLS-1$
45 node.setAttribute("name", workingSet.getName()); //$NON-NLS-1$
46 doc.appendChild(node);
47         return serializeDocument(doc);
48     }
49     
50     /* (non-Javadoc)
51      * @see org.eclipse.debug.internal.core.sourcelookup.ISourceContainerType#createSourceContainer(java.lang.String)
52      */
53     public ISourceContainer createSourceContainer(String JavaDoc memento)throws CoreException {
54         IWorkingSet workingSet = null;
55         Exception JavaDoc ex = null;
56         try {
57             Element JavaDoc root = null;
58             DocumentBuilder JavaDoc parser =
59                 DocumentBuilderFactory.newInstance().newDocumentBuilder();
60             parser.setErrorHandler(new DefaultHandler JavaDoc());
61             StringReader JavaDoc reader = new StringReader JavaDoc(memento);
62             InputSource JavaDoc source = new InputSource JavaDoc(reader);
63             root = parser.parse(source).getDocumentElement();
64             
65             String JavaDoc name = root.getAttribute("name");//$NON-NLS-1$
66
67             if (isEmpty(name)) {
68                 abort(SourceLookupUIMessages.sourceSearch_initError,null);
69             }
70             workingSet = PlatformUI.getWorkbench().getWorkingSetManager().getWorkingSet(name);
71             //check that set still exists
72 if (workingSet == null) {
73                 abort(SourceLookupUIMessages.sourceSearch_initError, null);
74             }
75             return new WorkingSetSourceContainer(workingSet);
76             
77         } catch (ParserConfigurationException JavaDoc e) {
78             ex = e;
79         } catch (SAXException JavaDoc e) {
80             ex = e;
81         } catch (IOException JavaDoc e) {
82             ex = e;
83         }
84         
85         abort(SourceLookupUIMessages.sourceSearch_initError, ex);
86         return null;
87     }
88
89     private boolean isEmpty(String JavaDoc string) {
90         return string == null || string.length() == 0;
91     }
92     
93     
94 }
95
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