| //------------------------------------------------------------------------------ |
| // 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.persistence; |
| |
| import org.eclipse.emf.common.util.URI; |
| import org.eclipse.emf.ecore.EObject; |
| |
| /** |
| * 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 MultiFileResourceSetImpl { |
| 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 MultiFileResourceSetImpl referencedResourceSet; |
| |
| /** |
| * Creates an {@link ExtendedResourceSet} that can have reference to objects in the given resource set |
| */ |
| public ExtendedResourceSet(MultiFileResourceSetImpl referencedResourceSet) { |
| super(); |
| this.referencedResourceSet = referencedResourceSet; |
| } |
| |
| /** |
| * 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; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.epf.persistence.MultiFileResourceSetImpl#getEObject(org.eclipse.emf.ecore.EObject, org.eclipse.emf.common.util.URI, boolean) |
| */ |
| public EObject getEObject(EObject resolver, 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(resolver, uri, loadOnDemand); |
| } catch (UnnormalizedURIException e) { |
| ex = e; |
| } |
| if(object != null) { |
| return object; |
| } |
| } |
| if(uriType == URI_TYPE_UNKNOWN || uriType == URI_TYPE_EXTERNAL) { |
| try { |
| object = referencedResourceSet.getEObject(resolver, uri, |
| loadOnDemand); |
| } catch (UnnormalizedURIException e) { |
| ex = e; |
| } |
| } |
| |
| if(ex != null) { |
| throw ex; |
| } |
| return object; |
| } |
| } |