added DIHandler

1 files changed, 52 insertions, 0 deletions

diff --git a/bundles/org.eclipse.e4.tools.compat/src/org/eclipse/e4/tools/compat/parts/DIHandler.java b/bundles/org.eclipse.e4.tools.compat/src/org/eclipse/e4/tools/compat/parts/DIHandler.java
new file mode 100644
index 00000000..1bb21838
--- /dev/null
+++ b/bundles/org.eclipse.e4.tools.compat/src/org/eclipse/e4/tools/compat/parts/DIHandler.java
@@ -0,0 +1,52 @@
+/*******************************************************************************
+ * Copyright (c) 2012 EclipseSource München GmbH 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:
+ *     Jonas Helming <jhelming@eclipsesource.com> - initial API and implementation
+ ******************************************************************************/
+package org.eclipse.e4.tools.compat.parts;
+
+import org.eclipse.core.commands.AbstractHandler;
+import org.eclipse.core.commands.ExecutionEvent;
+import org.eclipse.core.commands.ExecutionException;
+import org.eclipse.e4.core.contexts.ContextInjectionFactory;
+import org.eclipse.e4.core.contexts.IEclipseContext;
+import org.eclipse.e4.core.di.annotations.Execute;
+import org.eclipse.ui.PlatformUI;
+/**
+ * This is a preliminary implementation of a Handler wrapper. It does not support @CanExecute yet
+ * @author Jonas
+ *
+ * @param <C>
+ */
+public class DIHandler<C> extends AbstractHandler {
+
+	private Class<C> clazz;
+	private C component;
+
+	public DIHandler(Class<C> clazz) {
+		this.clazz = clazz;
+		IEclipseContext context = getActiveContext();
+		component = ContextInjectionFactory.make(clazz, context);
+	}
+
+	private static IEclipseContext getActiveContext() {
+		IEclipseContext parentContext = getParentContext();
+		return parentContext.getActiveLeaf();
+	}
+
+	private static IEclipseContext getParentContext() {
+		return (IEclipseContext) PlatformUI.getWorkbench().getService(
+				IEclipseContext.class);
+	}
+
+	public Object execute(ExecutionEvent event) throws ExecutionException {
+		return ContextInjectionFactory.invoke(component, Execute.class,
+				getActiveContext());
+	}
+
+}
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