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Diffstat (limited to 'plugins/org.eclipse.emf.cdo.dawn.examples.acore.diagram/src/org/eclipse/emf/cdo/dawn/examples/acore/diagram/providers/AcoreEditPartProvider.java')
-rw-r--r--plugins/org.eclipse.emf.cdo.dawn.examples.acore.diagram/src/org/eclipse/emf/cdo/dawn/examples/acore/diagram/providers/AcoreEditPartProvider.java172
1 files changed, 172 insertions, 0 deletions
diff --git a/plugins/org.eclipse.emf.cdo.dawn.examples.acore.diagram/src/org/eclipse/emf/cdo/dawn/examples/acore/diagram/providers/AcoreEditPartProvider.java b/plugins/org.eclipse.emf.cdo.dawn.examples.acore.diagram/src/org/eclipse/emf/cdo/dawn/examples/acore/diagram/providers/AcoreEditPartProvider.java
new file mode 100644
index 0000000000..47de25adf8
--- /dev/null
+++ b/plugins/org.eclipse.emf.cdo.dawn.examples.acore.diagram/src/org/eclipse/emf/cdo/dawn/examples/acore/diagram/providers/AcoreEditPartProvider.java
@@ -0,0 +1,172 @@
+/*
+ * Copyright (c) 2004 - 2010 Eike Stepper (Berlin, Germany).
+ * 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:
+ * Martin Fluegge - initial API and implementation
+ *
+ */
+package org.eclipse.emf.cdo.dawn.examples.acore.diagram.providers;
+
+import java.lang.ref.WeakReference;
+
+import org.eclipse.emf.cdo.dawn.examples.acore.diagram.edit.parts.ACoreRootEditPart;
+import org.eclipse.emf.cdo.dawn.examples.acore.diagram.edit.parts.AcoreEditPartFactory;
+import org.eclipse.emf.cdo.dawn.examples.acore.diagram.part.AcoreVisualIDRegistry;
+import org.eclipse.gef.EditPart;
+import org.eclipse.gef.EditPartFactory;
+import org.eclipse.gmf.runtime.common.core.service.IOperation;
+import org.eclipse.gmf.runtime.diagram.ui.editparts.IGraphicalEditPart;
+import org.eclipse.gmf.runtime.diagram.ui.services.editpart.AbstractEditPartProvider;
+import org.eclipse.gmf.runtime.diagram.ui.services.editpart.CreateGraphicEditPartOperation;
+import org.eclipse.gmf.runtime.diagram.ui.services.editpart.IEditPartOperation;
+import org.eclipse.gmf.runtime.notation.View;
+
+/**
+ * @generated
+ */
+public class AcoreEditPartProvider extends AbstractEditPartProvider
+{
+
+ /**
+ * @generated
+ */
+ private EditPartFactory factory;
+
+ /**
+ * @generated
+ */
+ private boolean allowCaching;
+
+ /**
+ * @generated
+ */
+ private WeakReference cachedPart;
+
+ /**
+ * @generated
+ */
+ private WeakReference cachedView;
+
+ /**
+ * @generated
+ */
+ public AcoreEditPartProvider()
+ {
+ setFactory(new AcoreEditPartFactory());
+ setAllowCaching(true);
+ }
+
+ /**
+ * @generated
+ */
+ public final EditPartFactory getFactory()
+ {
+ return factory;
+ }
+
+ /**
+ * @generated
+ */
+ protected void setFactory(EditPartFactory factory)
+ {
+ this.factory = factory;
+ }
+
+ /**
+ * @generated
+ */
+ public final boolean isAllowCaching()
+ {
+ return allowCaching;
+ }
+
+ /**
+ * @generated
+ */
+ protected synchronized void setAllowCaching(boolean allowCaching)
+ {
+ this.allowCaching = allowCaching;
+ if (!allowCaching)
+ {
+ cachedPart = null;
+ cachedView = null;
+ }
+ }
+
+ /**
+ * @generated
+ */
+ protected IGraphicalEditPart createEditPart(View view)
+ {
+ EditPart part = factory.createEditPart(null, view);
+ if (part instanceof IGraphicalEditPart)
+ {
+ return (IGraphicalEditPart)part;
+ }
+ return null;
+ }
+
+ /**
+ * @generated
+ */
+ protected IGraphicalEditPart getCachedPart(View view)
+ {
+ if (cachedView != null && cachedView.get() == view)
+ {
+ return (IGraphicalEditPart)cachedPart.get();
+ }
+ return null;
+ }
+
+ /**
+ * @generated
+ */
+ public synchronized IGraphicalEditPart createGraphicEditPart(View view)
+ {
+ if (isAllowCaching())
+ {
+ IGraphicalEditPart part = getCachedPart(view);
+ cachedPart = null;
+ cachedView = null;
+ if (part != null)
+ {
+ return part;
+ }
+ }
+ return createEditPart(view);
+ }
+
+ /**
+ * @generated
+ */
+ public synchronized boolean provides(IOperation operation)
+ {
+ if (operation instanceof CreateGraphicEditPartOperation)
+ {
+ View view = ((IEditPartOperation)operation).getView();
+ if (!ACoreRootEditPart.MODEL_ID.equals(AcoreVisualIDRegistry.getModelID(view)))
+ {
+ return false;
+ }
+ if (isAllowCaching() && getCachedPart(view) != null)
+ {
+ return true;
+ }
+ IGraphicalEditPart part = createEditPart(view);
+ if (part != null)
+ {
+ if (isAllowCaching())
+ {
+ cachedPart = new WeakReference(part);
+ cachedView = new WeakReference(view);
+ }
+ return true;
+ }
+ }
+ return false;
+ }
+}

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