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/*******************************************************************************
* Copyright (c) 2004, 2011 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.internal.tasks.core.data;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.eclipse.core.runtime.Assert;
import org.eclipse.mylyn.tasks.core.data.ITaskAttributeDiff;
import org.eclipse.mylyn.tasks.core.data.TaskAttribute;
/**
* @author Steffen Pingel
*/
public class TaskAttributeDiff implements ITaskAttributeDiff {
private String attributeId;
private final TaskAttribute newAttribute;
private final List<String> newValues;
private final TaskAttribute oldAttribute;
private final List<String> oldValues;
public TaskAttributeDiff(TaskAttribute oldAttribute, TaskAttribute newAttribute) {
Assert.isTrue(oldAttribute != null || newAttribute != null);
this.oldAttribute = oldAttribute;
this.newAttribute = newAttribute;
if (oldAttribute != null) {
this.oldValues = oldAttribute.getTaskData().getAttributeMapper().getValueLabels(oldAttribute);
this.attributeId = oldAttribute.getId();
} else {
this.oldValues = Collections.emptyList();
}
if (newAttribute != null) {
this.newValues = newAttribute.getTaskData().getAttributeMapper().getValueLabels(newAttribute);
this.attributeId = newAttribute.getId();
} else {
this.newValues = Collections.emptyList();
}
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
TaskAttributeDiff other = (TaskAttributeDiff) obj;
if (attributeId == null) {
if (other.attributeId != null) {
return false;
}
} else if (!attributeId.equals(other.attributeId)) {
return false;
}
return true;
}
public List<String> getAddedValues() {
List<String> result = new ArrayList<String>(getNewValues());
if (getOldValues() != null) {
result.removeAll(getOldValues());
}
return result;
}
public TaskAttribute getNewAttribute() {
return newAttribute;
}
public List<String> getNewValues() {
return newValues;
}
public TaskAttribute getOldAttribute() {
return oldAttribute;
}
public List<String> getOldValues() {
return oldValues;
}
public List<String> getRemovedValues() {
List<String> result = new ArrayList<String>(getOldValues());
if (getNewValues() != null) {
result.removeAll(getNewValues());
}
return result;
}
public boolean hasChanges() {
return !oldValues.equals(newValues);
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((attributeId == null) ? 0 : attributeId.hashCode());
return result;
}
public String getLabel() {
if (newAttribute != null) {
return newAttribute.getTaskData().getAttributeMapper().getLabel(newAttribute);
} else {
return oldAttribute.getTaskData().getAttributeMapper().getLabel(oldAttribute);
}
}
public String getAttributeId() {
return attributeId;
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append("TaskAttributeDiff [attributeId="); //$NON-NLS-1$
builder.append(attributeId);
builder.append(", newAttribute="); //$NON-NLS-1$
builder.append(newAttribute);
builder.append(", oldAttribute="); //$NON-NLS-1$
builder.append(oldAttribute);
builder.append("]"); //$NON-NLS-1$
return builder.toString();
}
}
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