Delegation.java

/**
 * Copyright 2010 JBoss Inc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jbpm.task;

import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.Collections;
import java.util.List;

import javax.persistence.Embeddable;
import javax.persistence.EnumType;
import javax.persistence.Enumerated;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;

import org.jbpm.task.utils.CollectionUtils;

@Embeddable
public class Delegation implements Externalizable {
	@Enumerated(EnumType.STRING)
	private AllowedToDelegate allowedToDelegate;

	@ManyToMany
	@JoinTable(name = "JBPM_DELEGATION_DELEGATES", joinColumns = @JoinColumn(name = "task_id"), inverseJoinColumns = @JoinColumn(name = "entity_id"))
	private List<OrganizationalEntity> delegates = Collections.emptyList();

	public void writeExternal(final ObjectOutput out) throws IOException {
		if (allowedToDelegate != null) {
			out.writeBoolean(true);
			out.writeUTF(allowedToDelegate.toString());
		} else {
			out.writeBoolean(false);
		}
		CollectionUtils.writeOrganizationalEntityList(delegates, out);
	}

	public void readExternal(final ObjectInput in) throws IOException,
			ClassNotFoundException {
		if (in.readBoolean()) {
			allowedToDelegate = AllowedToDelegate.valueOf(in.readUTF());
		}
		delegates = CollectionUtils.readOrganizationalEntityList(in);
	}

	public AllowedToDelegate getAllowed() {
		return allowedToDelegate;
	}

	public void setAllowed(final AllowedToDelegate allowedToDelegate) {
		this.allowedToDelegate = allowedToDelegate;
	}

	public List<OrganizationalEntity> getDelegates() {
		return delegates;
	}

	public void setDelegates(final List<OrganizationalEntity> delegates) {
		this.delegates = delegates;
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime
				* result
				+ ((allowedToDelegate == null) ? 0 : allowedToDelegate
						.hashCode());
		result = prime * result + CollectionUtils.hashCode(delegates);
		return result;
	}

	@Override
	public boolean equals(final Object obj) {
		if (this == obj) {
			return true;
		}
		if (obj == null) {
			return false;
		}
		if (!(obj instanceof Delegation)) {
			return false;
		}
		final Delegation other = (Delegation) obj;
		if (allowedToDelegate == null) {
			if (other.allowedToDelegate != null) {
				return false;
			}
		} else if (!allowedToDelegate.equals(other.allowedToDelegate)) {
			return false;
		}

		return CollectionUtils.equals(delegates, other.delegates);
	}
}