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/*******************************************************************************
* Copyright (c) 2004, 2008 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.tasks.core.data;
import org.eclipse.core.runtime.Assert;
import org.eclipse.mylyn.internal.tasks.core.Messages;
/**
* @author Steffen Pingel
* @since 3.0
*/
public class TaskRelation {
private final String taskId;
private final Kind kind;
private final Direction direction;
/**
* @since 3.0
*/
public enum Direction {
INWARD, OUTWARD
};
/**
* @since 3.0
*/
public enum Kind {
CONTAINMENT, DEPENDENCY, DUPLICATE
}
private TaskRelation(Kind kind, Direction direction, String taskId) {
Assert.isNotNull(kind);
Assert.isNotNull(direction);
Assert.isNotNull(taskId);
this.kind = kind;
this.direction = direction;
this.taskId = taskId;
}
/**
* @since 3.0
*/
public String getTaskId() {
return taskId;
}
/**
* @since 3.0
*/
public Kind getKind() {
return kind;
}
/**
* @since 3.0
*/
public Direction getDirection() {
return direction;
}
/**
* @since 3.0
*/
public static TaskRelation parentTask(String taskId) {
return new TaskRelation(Kind.CONTAINMENT, Direction.INWARD, taskId);
}
/**
* @since 3.0
*/
public static TaskRelation subtask(String taskId) {
return new TaskRelation(Kind.CONTAINMENT, Direction.OUTWARD, taskId);
}
/**
* @since 3.0
*/
public static TaskRelation dependency(String taskId, Direction direction) {
return new TaskRelation(Kind.DEPENDENCY, direction, taskId);
}
/**
* @since 3.12
*/
public boolean isParentRelation() {
return kind == Kind.CONTAINMENT && direction == Direction.INWARD;
}
/**
* @since 3.12
*/
public boolean isChildRelation() {
return kind == Kind.CONTAINMENT && direction == Direction.OUTWARD;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + direction.hashCode();
result = prime * result + kind.hashCode();
result = prime * result + taskId.hashCode();
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
TaskRelation other = (TaskRelation) obj;
return direction.equals(other.direction) && kind.equals(other.kind) && taskId.equals(other.taskId);
}
@Override
public String toString() {
if (isParentRelation()) {
return Messages.TaskRelation_Parent;
} else if (isChildRelation()) {
return Messages.TaskRelation_Subtask;
} else {
return Messages.TaskRelation_Dependency;
}
}
}
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