| /******************************************************************************* |
| * Copyright (c) 2009 Tasktop Technologies 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: |
| * Tasktop Technologies - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.mylyn.context.core; |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.eclipse.core.runtime.Assert; |
| |
| /** |
| * @author Shawn Minto |
| * @since 3.2 |
| */ |
| public class ContextChangeEvent { |
| |
| /** |
| * @author Shawn Minto |
| * @since 3.2 |
| */ |
| public enum ContextChangeKind { |
| PRE_ACTIVATED, ACTIVATED, DEACTIVATED, CLEARED, INTEREST_CHANGED, LANDMARKS_ADDED, LANDMARKS_REMOVED, ELEMENTS_DELETED; |
| } |
| |
| private final String contextHandle; |
| |
| private final IInteractionContext context; |
| |
| private final ContextChangeKind eventKind; |
| |
| private final List<IInteractionElement> elements; |
| |
| private final boolean isExplicitManipulation; |
| |
| public ContextChangeEvent(ContextChangeKind eventKind, String contextHandle, IInteractionContext context, |
| List<IInteractionElement> elements) { |
| this(eventKind, contextHandle, context, elements, false); |
| } |
| |
| /** |
| * @since 3.3 |
| */ |
| public ContextChangeEvent(ContextChangeKind eventKind, String contextHandle, IInteractionContext context, |
| List<IInteractionElement> elements, boolean isExplicitManipulation) { |
| Assert.isNotNull(eventKind); |
| this.contextHandle = contextHandle; |
| this.context = context; |
| this.eventKind = eventKind; |
| if (elements == null) { |
| this.elements = Collections.emptyList(); |
| } else { |
| this.elements = elements; |
| } |
| this.isExplicitManipulation = isExplicitManipulation; |
| } |
| |
| /** |
| * The Type of context event that occurred |
| * |
| * @since 3.2 |
| */ |
| public ContextChangeKind getEventKind() { |
| return eventKind; |
| } |
| |
| /** |
| * The elements that were manipulated for the event (may be empty) |
| * |
| * @since 3.2 |
| */ |
| public List<IInteractionElement> getElements() { |
| return elements; |
| } |
| |
| /** |
| * The handle of the context that was changed (Can be null if a composite context with multiple |
| * IInteractionContext's is changed) |
| * |
| * @since 3.2 |
| */ |
| public String getContextHandle() { |
| return contextHandle; |
| } |
| |
| /** |
| * The context that was changed (Can be null e.g. context deleted) |
| * |
| * @since 3.2 |
| */ |
| public IInteractionContext getContext() { |
| return context; |
| } |
| |
| /** |
| * Utility for whether the manipulated context is the active one |
| * |
| * @since 3.2 |
| */ |
| public boolean isActiveContext() { |
| IInteractionContext activeContext = ContextCore.getContextManager().getActiveContext(); |
| return activeContext != null && activeContext.getHandleIdentifier() != null |
| && activeContext.getHandleIdentifier().equals(contextHandle); |
| } |
| |
| /** |
| * Whether the event was a result of a users explicit manipulation of the context (i.e. mark as landmark) This can |
| * only be true for {@link ContextChangeKind#LANDMARKS_ADDED},{@link ContextChangeKind#LANDMARKS_REMOVED} and |
| * {@link ContextChangeKind#ELEMENTS_DELETED} |
| * |
| * @since 3.3 |
| */ |
| public boolean isExplicitManipulation() { |
| return isExplicitManipulation; |
| } |
| } |