/**
 * 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.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Lob;
import javax.persistence.ManyToOne;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;

@Entity
@Table(name = "task_comment")
@SequenceGenerator(name="commentIdSeq", sequenceName="COMMENT_ID_SEQ", allocationSize=1)
public class Comment implements Externalizable  {
    
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO, generator="commentIdSeq")
    private long id;

    @Lob @Column(length=65535)
    private String text;
    
    @ManyToOne()
    private User addedBy;
    
    private Date addedAt;    
    
    public void writeExternal(ObjectOutput out) throws IOException {
        out.writeLong( id );
        if( text == null ) { 
            text = "";
        }
        out.writeUTF( text );
        // There are no guarantees that addedBy is not null = potential bug
        addedBy.writeExternal( out );    
        long addedAtTime = 0;
        if( addedAt != null ) { 
            addedAtTime = addedAt.getTime();
        }
        out.writeLong( addedAtTime );
    }    
    
    public void readExternal(ObjectInput in) throws IOException,
                                            ClassNotFoundException {
        id = in.readLong();
        text = in.readUTF();
        addedBy = new User();
        addedBy.readExternal( in );
        addedAt = new Date( in.readLong() );
    }
    
    public Long getId() {
        return id;
    }

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

    public String getText() {
        return text;
    }

    public void setText(String text) {
        this.text = text;
    }

    public Date getAddedAt() {
        return addedAt;
    }

    public void setAddedAt(Date addedDate) {
        this.addedAt = addedDate;
    }

    public User getAddedBy() {
        return addedBy;
    }

    public void setAddedBy(User addedBy) {
        this.addedBy = addedBy;
    }

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

    @Override
    public boolean equals(Object obj) {
        if ( this == obj ) return true;
        if ( obj == null ) return false;
        if ( !(obj instanceof Comment) ) return false;
        Comment other = (Comment) obj;
        if ( addedBy == null ) {
            if ( other.addedBy != null ) return false;
        } else if ( !addedBy.equals( other.addedBy ) ) return false;
        if ( addedAt == null ) {
            if ( other.addedAt != null ) return false;
        } else if ( addedAt.getTime() != other.addedAt.getTime() ) return false;
        if ( text == null ) {
            if ( other.text != null ) return false;
        } else if ( !text.equals( other.text ) ) return false;
        return true;
    }    
    
    
}
