/*_############################################################################
  _## 
  _##  SNMP4J-AgentX - AgentXGetPDU.java  
  _## 
  _##  Copyright (C) 2005-2026  Frank Fock (SNMP4J.org)
  _##  
  _##  This program is free software; you can redistribute it and/or modify
  _##  it under the terms of the GNU General Public License version 2 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., 51 Franklin Street, Fifth Floor, Boston, 
  _##  MA  02110-1301  USA
  _##  
  _##########################################################################*/

package org.snmp4j.agent.agentx;

import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.OID;
import org.snmp4j.agent.DefaultMOScope;
import org.snmp4j.smi.*;
import java.io.IOException;
import java.nio.ByteBuffer;

/**
 * The {@link AgentXGetPDU} represents the agentx-Get-PDU defined by RFC 2741.
 */
public class AgentXGetPDU extends AgentXRequestPDU {

    private static final long serialVersionUID = -6529473376764354480L;

    /**
     * Creates a {@link AgentXGetPDU}.
     * @param context
     *    the SNMPv3 context.
     * @param oids
     *    the requested OIDs.
     */
    public AgentXGetPDU(OctetString context, OID[] oids) {
        super(AGENTX_GET_PDU, context);
        setOids(oids);
    }

    /**
     * Creates a {@link AgentXGetPDU} from a {@link AgentXMessageHeader}.
     * @param header
     *    the message header.
     */
    public AgentXGetPDU(AgentXMessageHeader header) {
        super(header);
        if (header.getType() != AGENTX_GET_PDU) {
            throw new IllegalArgumentException();
        }
    }

    /**
     * Sets the OIDs.
     * @param oids
     *    the OIDs for the GET operation.
     */
    public void setOids(OID[] oids) {
        this.ranges = new DefaultMOScope[oids.length];
        for (int i=0; i<oids.length; i++) {
            ranges[i] = new DefaultMOScope(oids[i], true, oids[i], true);
        }
    }

    /**
     * Gets the OIDs.
     * @return
     *    the OIDs requested.
     */
    public OID[] getOids() {
        OID[] oids = new OID[ranges.length];
        for (int i=0; i<ranges.length; i++) {
            oids[i] = ranges[i].getLowerBound();
        }
        return oids;
    }

    @Override
    protected void decodeAfterContext(ByteBuffer buf, int length)
            throws IOException
    {
        ranges = AgentXProtocol.decodeRanges(buf, true);
    }

}
