Java example source code file (SnmpPduFactoryBER.java)

This example Java source code file (SnmpPduFactoryBER.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

jmx, serializable, snmp, snmpmessage, snmpmsg, snmppdufactory, snmppdufactoryber, snmpstatusexception, snmptoobigexception, snmpv3message

The SnmpPduFactoryBER.java Java example source code

/*
 * Copyright (c) 1998, 2006, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */


package com.sun.jmx.snmp;


// java imports
//
import java.io.Serializable;

// jmx import
//
import com.sun.jmx.snmp.SnmpPduFactory;
import com.sun.jmx.snmp.SnmpMessage;
import com.sun.jmx.snmp.SnmpPduPacket;
import com.sun.jmx.snmp.SnmpPdu;
import com.sun.jmx.snmp.SnmpMsg;
import com.sun.jmx.snmp.SnmpStatusException;
import com.sun.jmx.snmp.SnmpTooBigException;
import com.sun.jmx.snmp.SnmpDefinitions;

// SNMP Runtime import
//
import com.sun.jmx.snmp.SnmpV3Message;

/**
 * Default implementation of the {@link com.sun.jmx.snmp.SnmpPduFactory SnmpPduFactory} interface.
 * <BR>It uses the BER (basic encoding rules) standardized encoding scheme associated with ASN.1.
 * <P>
 * This implementation of the <CODE>SnmpPduFactory is very
 * basic: it simply calls encoding and decoding methods from
 * {@link com.sun.jmx.snmp.SnmpMsg}.
 * <BLOCKQUOTE>
 * <PRE>
 * public SnmpPdu decodeSnmpPdu(SnmpMsg msg)
 * throws SnmpStatusException {
 *   return msg.decodeSnmpPdu() ;
 * }
 *
 * public SnmpMsg encodeSnmpPdu(SnmpPdu pdu, int maxPktSize)
 * throws SnmpStatusException, SnmpTooBigException {
 *   SnmpMsg result = new SnmpMessage() ;       // for SNMP v1/v2
 * <I>or
 *   SnmpMsg result = new SnmpV3Message() ;     // for SNMP v3
 *   result.encodeSnmpPdu(pdu, maxPktSize) ;
 *   return result ;
 * }
 * </PRE>
 * </BLOCKQUOTE>
 * To implement your own object, you can implement <CODE>SnmpPduFactory
 * or extend <CODE>SnmpPduFactoryBER.
 * <p>This API is a Sun Microsystems internal API  and is subject
 * to change without notice.</b>

 */

public class SnmpPduFactoryBER implements SnmpPduFactory, Serializable {
   private static final long serialVersionUID = -3525318344000547635L;

   /**
     * Calls {@link com.sun.jmx.snmp.SnmpMsg#decodeSnmpPdu SnmpMsg.decodeSnmpPdu}
     * on the specified message and returns the resulting <CODE>SnmpPdu.
     *
     * @param msg The SNMP message to be decoded.
     * @return The resulting SNMP PDU packet.
     * @exception SnmpStatusException If the encoding is invalid.
     *
     * @since 1.5
     */
    public SnmpPdu decodeSnmpPdu(SnmpMsg msg) throws SnmpStatusException {
        return msg.decodeSnmpPdu();
    }

    /**
     * Encodes the specified <CODE>SnmpPdu and
     * returns the resulting <CODE>SnmpMsg. If this
     * method returns null, the specified <CODE>SnmpPdu
     * will be dropped and the current SNMP request will be
     * aborted.
     *
     * @param p The <CODE>SnmpPdu to be encoded.
     * @param maxDataLength The size limit of the resulting encoding.
     * @return Null or a fully encoded <CODE>SnmpMsg.
     * @exception SnmpStatusException If <CODE>pdu contains
     *            illegal values and cannot be encoded.
     * @exception SnmpTooBigException If the resulting encoding does not
     *            fit into <CODE>maxPktSize bytes.
     *
     * @since 1.5
     */
    public SnmpMsg encodeSnmpPdu(SnmpPdu p, int maxDataLength)
        throws SnmpStatusException, SnmpTooBigException {
        switch(p.version) {
        case SnmpDefinitions.snmpVersionOne:
        case SnmpDefinitions.snmpVersionTwo: {
            SnmpMessage result = new SnmpMessage();
            result.encodeSnmpPdu((SnmpPduPacket) p, maxDataLength);
            return result;
        }
        case SnmpDefinitions.snmpVersionThree: {
            SnmpV3Message result = new SnmpV3Message();
            result.encodeSnmpPdu(p, maxDataLength);
            return result;
        }
        default:
            return null;
        }
    }
}