Department.java

/**
 * Copyright 2009-2013 Oy Vaadin Ltd
 *
 * 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 com.vaadin.demo.jpaaddressbook.domain;

import java.util.Set;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.Transient;

@Entity
public class Department {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    private String name;

    @OneToMany(mappedBy = "department")
    private Set<Person> persons;

    @Transient
    private Boolean superDepartment;

    @ManyToOne
    private Department parent;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Set<Person> getPersons() {
        return persons;
    }

    public void setPersons(Set<Person> persons) {
        this.persons = persons;
    }

    public Department getParent() {
        return parent;
    }

    public void setParent(Department parent) {
        this.parent = parent;
    }

    public boolean isSuperDepartment() {
        if (superDepartment == null) {
            superDepartment = getPersons().size() == 0;
        }
        return superDepartment;
    }

    @Transient
    public String getHierarchicalName() {
        if (parent != null) {
            return parent.toString() + " : " + name;
        }
        return name;
    }

    @Override
    public String toString() {
        return getHierarchicalName();
    }
}