onedev/commons.hibernate/src/main/java/com/pmease/commons/hibernate/AbstractEntity.java

package com.pmease.commons.hibernate;

import java.io.Serializable;

import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.MappedSuperclass;

import org.apache.commons.lang.builder.EqualsBuilder;
import org.apache.commons.lang.builder.HashCodeBuilder;
import org.hibernate.annotations.GenericGenerator;

@MappedSuperclass
public abstract class AbstractEntity implements Serializable {

	private static final long serialVersionUID = 1L;
	
	@Id
	@GeneratedValue(generator="increment")
	@GenericGenerator(name="increment", strategy="increment")
	private Long id;

	public Long getId() {
		return id;
	}

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

	public boolean equals(Object other) {
		if (!(other instanceof AbstractEntity))
			return false;
		if (this == other)
			return true;
		AbstractEntity otherEntity = (AbstractEntity) other;
		if (getId() == null && otherEntity.getId() == null)
			return super.equals(other);
		else 
			return new EqualsBuilder().append(getId(), otherEntity.getId()).isEquals();
	}

	public int hashCode() {
		if (getId() == null)
			return super.hashCode();
		else
			return new HashCodeBuilder(17, 37).append(getId()).toHashCode();
	}

}