/* * 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</CODE> 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</I> *   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</CODE> * or extend <CODE>SnmpPduFactoryBER</CODE>. * <p><b>This API is a Sun Microsystems internal API  and is subject * to change without notice.</b></p> */ 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</CODE>.     *     * @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</CODE> and     * returns the resulting <CODE>SnmpMsg</CODE>. If this     * method returns null, the specified <CODE>SnmpPdu</CODE>     * will be dropped and the current SNMP request will be     * aborted.     *     * @param p The <CODE>SnmpPdu</CODE> to be encoded.     * @param maxDataLength The size limit of the resulting encoding.     * @return Null or a fully encoded <CODE>SnmpMsg</CODE>.     * @exception SnmpStatusException If <CODE>pdu</CODE> contains     *            illegal values and cannot be encoded.     * @exception SnmpTooBigException If the resulting encoding does not     *            fit into <CODE>maxPktSize</CODE> 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;        }    }}