| /******************************************************************************* |
| * Copyright (c) 2010 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 API and implementation |
| *******************************************************************************/ |
| package org.eclipse.wst.common.componentcore.internal.builder; |
| |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.eclipse.core.resources.IProject; |
| |
| public class DependencyGraphEvent implements IDependencyGraphUpdateEvent { |
| |
| private int type = 0; |
| private long modStamp = 0; |
| |
| /** |
| * Both these maps are reverse reference maps as the ones are in |
| * {@link IDependencyGraph} |
| */ |
| private Map<IProject, Set<IProject>> addedReferences = null; |
| private Map<IProject, Set<IProject>> removedReferences = null; |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @seeorg.eclipse.wst.common.componentcore.internal.builder. |
| * IDependencyGraphUpdateEvent#getType() |
| */ |
| public int getType() { |
| return type; |
| } |
| |
| private void setType(int newType){ |
| this.type = newType; |
| } |
| |
| void setModStamp(long modStamp) { |
| this.modStamp = modStamp; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @seeorg.eclipse.wst.common.componentcore.internal.builder. |
| * IDependencyGraphUpdateEvent#getModStamp() |
| */ |
| public long getModStamp() { |
| return modStamp; |
| } |
| |
| void addRefererence(IProject sourceProject, IProject targetProject) { |
| if (sourceProject == null) { |
| throw new NullPointerException("Source project must not be null."); |
| } |
| if (targetProject == null) { |
| throw new NullPointerException("Target project must not be null."); |
| } |
| //update removed references accordingly |
| if(removedReferences != null){ |
| Set references = removedReferences.get(targetProject); |
| if(references != null){ |
| if(references.remove(sourceProject)) { |
| if(references.isEmpty()){ |
| removedReferences.remove(targetProject); |
| if(removedReferences.isEmpty()){ |
| removedReferences = null; |
| if((getType() & ADDED) == ADDED){ |
| setType(ADDED); |
| } else { |
| setType(0); |
| } |
| } |
| } |
| //there is no net change, so return. |
| return; |
| } |
| } |
| } |
| |
| if (addedReferences == null) { |
| setType(getType() | ADDED); |
| addedReferences = new HashMap<IProject, Set<IProject>>(); |
| } |
| Set references = addedReferences.get(targetProject); |
| if (references == null) { |
| references = new HashSet<IProject>(); |
| addedReferences.put(targetProject, references); |
| } |
| references.add(sourceProject); |
| |
| |
| } |
| |
| void removeReference(IProject sourceProject, IProject targetProject) { |
| if (sourceProject == null) { |
| throw new NullPointerException("Source project must not be null."); |
| } |
| if (targetProject == null) { |
| throw new NullPointerException("Target project must not be null."); |
| } |
| |
| //updated added references accordingly |
| if(addedReferences != null){ |
| Set references = addedReferences.get(targetProject); |
| if(references != null){ |
| if(references.remove(sourceProject)){ |
| if(references.isEmpty()){ |
| addedReferences.remove(targetProject); |
| if(addedReferences.isEmpty()){ |
| addedReferences = null; |
| if((getType() & REMOVED) == REMOVED){ |
| setType(REMOVED); |
| } else { |
| setType(0); |
| } |
| } |
| } |
| //there is no net change, so return. |
| return; |
| } |
| } |
| } |
| |
| if (removedReferences == null) { |
| setType(getType() | REMOVED); |
| removedReferences = new HashMap<IProject, Set<IProject>>(); |
| } |
| Set references = removedReferences.get(targetProject); |
| if (references == null) { |
| references = new HashSet<IProject>(); |
| removedReferences.put(targetProject, references); |
| } |
| references.add(sourceProject); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @seeorg.eclipse.wst.common.componentcore.internal.builder. |
| * IDependencyGraphUpdateEvent#getAddedReferences() |
| */ |
| public Map<IProject, Set<IProject>> getAddedReferences() { |
| if (addedReferences == null) { |
| return Collections.EMPTY_MAP; |
| } |
| return addedReferences; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @seeorg.eclipse.wst.common.componentcore.internal.builder. |
| * IDependencyGraphUpdateEvent#getRemovedReferences() |
| */ |
| public Map<IProject, Set<IProject>> getRemovedReferences() { |
| if (removedReferences == null) { |
| return Collections.EMPTY_MAP; |
| } |
| return removedReferences; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuffer buff = new StringBuffer("Dependency Graph Event \n{\n getModStamp() = "+getModStamp()+"\n hashCode() = "+hashCode()+"\n"); |
| boolean added = (getType() & ADDED) == ADDED; |
| if(added){ |
| buff.append(" ADDED:\n" ); |
| for(Iterator<Map.Entry<IProject, Set<IProject>>> iterator = getAddedReferences().entrySet().iterator(); iterator.hasNext();){ |
| Map.Entry<IProject, Set<IProject>> entry = iterator.next(); |
| buff.append(" " + entry.getKey().getName() + " -> {"); |
| for (Iterator<IProject> mappedProjects = entry.getValue().iterator(); mappedProjects.hasNext();) { |
| buff.append(mappedProjects.next().getName()); |
| if (mappedProjects.hasNext()) { |
| buff.append(", "); |
| } |
| } |
| buff.append("}\n"); |
| } |
| } |
| boolean removed = (getType() & REMOVED) == REMOVED; |
| if(removed){ |
| buff.append(" REMOVED:\n" ); |
| for(Iterator<Map.Entry<IProject, Set<IProject>>> iterator = getRemovedReferences().entrySet().iterator(); iterator.hasNext();){ |
| Map.Entry<IProject, Set<IProject>> entry = iterator.next(); |
| buff.append(" " + entry.getKey().getName() + " -> {"); |
| for (Iterator<IProject> mappedProjects = entry.getValue().iterator(); mappedProjects.hasNext();) { |
| buff.append(mappedProjects.next().getName()); |
| if (mappedProjects.hasNext()) { |
| buff.append(", "); |
| } |
| } |
| buff.append("}\n"); |
| } |
| } |
| buff.append("}\n"); |
| return buff.toString(); |
| } |
| |
| } |