diff options
Diffstat (limited to 'plugins/org.eclipse.emf.cdo.ui.compare/src/org/eclipse/emf/cdo/ui/internal/compare/AbstractAction.java')
-rw-r--r-- | plugins/org.eclipse.emf.cdo.ui.compare/src/org/eclipse/emf/cdo/ui/internal/compare/AbstractAction.java | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/plugins/org.eclipse.emf.cdo.ui.compare/src/org/eclipse/emf/cdo/ui/internal/compare/AbstractAction.java b/plugins/org.eclipse.emf.cdo.ui.compare/src/org/eclipse/emf/cdo/ui/internal/compare/AbstractAction.java new file mode 100644 index 0000000000..1a6f6332ab --- /dev/null +++ b/plugins/org.eclipse.emf.cdo.ui.compare/src/org/eclipse/emf/cdo/ui/internal/compare/AbstractAction.java @@ -0,0 +1,101 @@ +/* + * Copyright (c) 2004 - 2012 Eike Stepper (Berlin, Germany) 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: + * Eike Stepper - initial API and implementation + */ +package org.eclipse.emf.cdo.ui.internal.compare; + +import org.eclipse.core.runtime.IAdaptable; +import org.eclipse.jface.action.IAction; +import org.eclipse.jface.viewers.ISelection; +import org.eclipse.jface.viewers.IStructuredSelection; +import org.eclipse.ui.IObjectActionDelegate; +import org.eclipse.ui.IWorkbenchPart; + +import java.util.ArrayList; +import java.util.Iterator; +import java.util.List; + +/** + * @author Eike Stepper + */ +public abstract class AbstractAction<TARGET> implements IObjectActionDelegate +{ + private final Class<TARGET> targetClass; + + private IWorkbenchPart targetPart; + + private ISelection selection; + + public AbstractAction(Class<TARGET> targetClass) + { + this.targetClass = targetClass; + } + + public IWorkbenchPart getTargetPart() + { + return targetPart; + } + + public void setActivePart(IAction action, IWorkbenchPart targetPart) + { + this.targetPart = targetPart; + } + + public void selectionChanged(IAction action, ISelection selection) + { + this.selection = selection; + } + + public void run(IAction action) + { + if (selection instanceof IStructuredSelection) + { + IStructuredSelection ssel = (IStructuredSelection)selection; + List<TARGET> targets = new ArrayList<TARGET>(); + + @SuppressWarnings("unchecked") + Iterator<Object> iterator = ssel.iterator(); + + while (iterator.hasNext()) + { + Object element = iterator.next(); + TARGET target = getAdapter(element, targetClass); + if (target != null) + { + targets.add(target); + } + } + + run(action, targets); + } + } + + protected abstract void run(IAction action, List<TARGET> targets); + + @SuppressWarnings("unchecked") + public static <T> T getAdapter(Object adaptable, Class<T> c) + { + if (c.isInstance(adaptable)) + { + return (T)adaptable; + } + + if (adaptable instanceof IAdaptable) + { + IAdaptable a = (IAdaptable)adaptable; + Object adapter = a.getAdapter(c); + if (c.isInstance(adapter)) + { + return (T)adapter; + } + } + + return null; + } +} |