/*
 * NOTE: This copyright does *not* cover user programs that use HQ
 * program services by normal system calls through the application
 * program interfaces provided as part of the Hyperic Plug-in Development
 * Kit or the Hyperic Client Development Kit - this is merely considered
 * normal use of the program, and does *not* fall under the heading of
 * "derived work".
 * 
 * Copyright (C) [2004, 2005, 2006], Hyperic, Inc.
 * This file is part of HQ.
 * 
 * HQ is free software; you can redistribute it and/or modify
 * it under the terms version 2 of the GNU General Public License as
 * published by the Free Software Foundation. This program is distributed
 * in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA.
 */

package org.hyperic.hq.agent;

import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;

public class FileData implements Externalizable {
    public static final int WRITETYPE_CREATEONLY        = 1;
    public static final int WRITETYPE_CREATEOROVERWRITE = 2;
    public static final int WRITETYPE_REWRITE           = 3;

    private String destFile;
    private long   size;
    private int    writeType;
    private String md5sum;
    
    /**
     * Default constructor for externalization only.
     */
    public FileData() {}

    public FileData(String destFile, long size, int writeType) {
        if (destFile == null) {
            throw new NullPointerException("destination file is null");
        }
        
        this.destFile  = destFile;
        this.size      = size;
        this.writeType = writeType;     
        
        if(this.writeType < WRITETYPE_CREATEONLY ||
           this.writeType > WRITETYPE_REWRITE)
        {
            throw new IllegalArgumentException("Unknown write-type, " +
                                               writeType);
        }
    }
    
    /**
     * Set the MD5 check sum for this file.
     * 
     * @param md5sum The check sum.
     * @throws NullPointerException if the check sum is <code>null</code>.
     */
    public void setMD5CheckSum(String md5sum) {
        if (md5sum == null) {
            throw new NullPointerException("md5sum check sum is null");
        }
        
        this.md5sum = md5sum;
    }
    
    /**
     * @return The MD5 check sum or <code>null</code> if never set.
     */
    public String getMD5CheckSum() {
        return this.md5sum;
    }

    public String getDestFile(){
        return this.destFile;
    }

    public long getSize(){
        return this.size;
    }

    public int getWriteType(){
        return this.writeType;
    }

    public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
        this.destFile = in.readUTF();
        this.size = in.readLong();
        this.writeType = in.readInt();
        this.md5sum = in.readUTF();
    }

    public void writeExternal(ObjectOutput out) throws IOException {
        out.writeUTF(this.destFile);
        out.writeLong(this.size);
        out.writeInt(this.writeType);
        out.writeUTF(this.md5sum);
    }
        
}