Base.java

/*
 * Copyright 2012 Nick Stuart
 * 
 * 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.bittheory.domain;

import java.io.Serializable;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.EntityListeners;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.MappedSuperclass;
import javax.persistence.PrePersist;
import javax.persistence.PreUpdate;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.validation.constraints.NotNull;

/**
 *
 * @author nick
 */
@MappedSuperclass
public class Base implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private long id;
    @NotNull
    @Column(insertable = true, updatable = false)
    @Temporal(TemporalType.TIMESTAMP)
    private Date createdAt;
    @NotNull
    @Temporal(TemporalType.TIMESTAMP)
    private Date updatedAt;

    public long getId() {
        return id;
    }

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

    public Date getCreatedAt() {
        return createdAt;
    }

    public void setCreatedAt(Date createdAt) {
        this.createdAt = createdAt;
    }

    public Date getUpdatedAt() {
        return updatedAt;
    }

    public void setUpdatedAt(Date updateAt) {
        this.updatedAt = updateAt;
    }

    @PrePersist
    @PreUpdate
    public void updateTimestamps() {
        this.updatedAt = new Date();
        if (createdAt == null) {
            this.createdAt = new Date();
        }
    }
}