172924: Support GMF based diagramming
diff --git a/plugins/org.eclipse.epf.library.persistence/src/org/eclipse/epf/library/persistence/util/ExtendedResourceSet.java b/plugins/org.eclipse.epf.library.persistence/src/org/eclipse/epf/library/persistence/util/ExtendedResourceSet.java
new file mode 100755
index 0000000..1057171
--- /dev/null
+++ b/plugins/org.eclipse.epf.library.persistence/src/org/eclipse/epf/library/persistence/util/ExtendedResourceSet.java
@@ -0,0 +1,92 @@
+//------------------------------------------------------------------------------
+// Copyright (c) 2005, 2006 IBM Corporation and others.
+// All rights reserved. This program and the accompanying materials
+// are made available under the terms of the Eclipse Public License v1.0
+// which accompanies this distribution, and is available at
+// http://www.eclipse.org/legal/epl-v10.html
+//
+// Contributors:
+// IBM Corporation - initial implementation
+//------------------------------------------------------------------------------
+package org.eclipse.epf.library.persistence.util;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+import org.eclipse.emf.common.util.URI;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.emf.ecore.resource.ResourceSet;
+import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
+import org.eclipse.epf.persistence.UnnormalizedURIException;
+
+/**
+ * A extended resource set whose objects can references objects of other resource set
+ *
+ * @author Phong Nguyen Le - Aug 9, 2006
+ * @since 1.0
+ */
+public class ExtendedResourceSet extends ResourceSetImpl {
+ public static final int URI_TYPE_UNKNOWN = 0;
+ public static final int URI_TYPE_LOCAL = 1;
+ public static final int URI_TYPE_EXTERNAL = 2;
+
+ protected List<ResourceSet> referencedResourceSets = new ArrayList<ResourceSet>();
+
+
+ /**
+ * Gets the type of the given URI.
+ *
+ * @param uri
+ * @return one of URI type constants: {@link #URI_TYPE_EXTERNAL}, {@link #URI_TYPE_LOCAL}, {@link #URI_TYPE_UNKNOWN}
+ */
+ protected int getURIType(URI uri) {
+ return URI_TYPE_UNKNOWN;
+ }
+
+ public boolean add(ResourceSet referencedResourceSet) {
+ if(!referencedResourceSets.contains(referencedResourceSet)) {
+ return referencedResourceSets.add(referencedResourceSet);
+ }
+ return false;
+ }
+
+ @Override
+ public EObject getEObject(URI uri, boolean loadOnDemand) {
+ EObject object = null;
+ UnnormalizedURIException ex = null;
+ int uriType = getURIType(uri);
+ if(uriType == URI_TYPE_UNKNOWN || uriType == URI_TYPE_LOCAL) {
+ try {
+ object = super.getEObject(uri, loadOnDemand);
+ } catch (UnnormalizedURIException e) {
+ ex = e;
+ }
+ if(object != null) {
+ return object;
+ }
+ }
+ if(uriType == URI_TYPE_UNKNOWN || uriType == URI_TYPE_EXTERNAL) {
+ for (Iterator iter = referencedResourceSets.iterator(); iter.hasNext();) {
+ ResourceSet resourceSet = (ResourceSet) iter.next();
+ try {
+ object = resourceSet.getEObject(uri, loadOnDemand);
+ if(object != null) {
+ return object;
+ }
+ } catch (UnnormalizedURIException e) {
+ ex = e;
+ }
+ }
+ }
+
+ if(ex != null) {
+ throw ex;
+ }
+ return object;
+ }
+
+ public void dispose() {
+ referencedResourceSets.clear();
+ }
+}
