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/* * Copyright (c) 2000, 2007, 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.agent; // java imports//import java.io.Serializable;import java.util.Hashtable;import java.util.Enumeration; // jmx imports//import com.sun.jmx.snmp.SnmpValue;import com.sun.jmx.snmp.SnmpVarBind;import com.sun.jmx.snmp.SnmpStatusException;import com.sun.jmx.snmp.agent.SnmpMibOid;import com.sun.jmx.snmp.agent.SnmpMibNode; /** * Represents a node in an SNMP MIB which corresponds to a table entry * meta node. * <P> * This class is used by the class generated by <CODE>mibgen</CODE>. * You should not need to use this class directly. * * <p><b>This API is a Sun Microsystems internal API  and is subject * to change without notice.</b></p> */ public abstract class SnmpMibEntry extends SnmpMibNode    implements Serializable {     /**     * Tells whether the given arc identifies a variable (scalar object) in     * this entry.     *     * @param arc An OID arc.     *     * @return <CODE>true</CODE> if `arc' leads to a variable.     */    public abstract boolean isVariable(long arc);     /**     * Tells whether the given arc identifies a readable scalar object in     * this entry.     *     * @param arc An OID arc.     *     * @return <CODE>true</CODE> if `arc' leads to a readable variable.     */    public abstract boolean isReadable(long arc);     /**     * Get the next OID arc corresponding to a readable scalar variable.     *     */    public long getNextVarId(long id, Object userData)        throws SnmpStatusException {        long nextvar = super.getNextVarId(id,userData);        while (!isReadable(nextvar))            nextvar = super.getNextVarId(nextvar,userData);        return nextvar;    }     /**     * Checks whether the given OID arc identifies a variable (columnar     * object).     *     * @param userData A contextual object containing user-data.     *        This object is allocated through the <code>     *        {@link com.sun.jmx.snmp.agent.SnmpUserDataFactory}</code>     *        for each incoming SNMP request.     *     * @exception If the given `arc' does not identify any variable in this     *    group, throws an SnmpStatusException.     */    public void validateVarId(long arc, Object userData)        throws SnmpStatusException {        if (isVariable(arc) == false) throw noSuchNameException;    }     /**     * Generic handling of the <CODE>get</CODE> operation.     * <p>The actual implementation of this method will be generated     * by mibgen. Usually, this implementation only delegates the     * job to some other provided runtime class, which knows how to     * access the MBean. The current toolkit thus provides two     * implementations:     * <ul><li>The standard implementation will directly access the     *         MBean through a java reference,</li>     *     <li>The generic implementation will access the MBean through     *         the MBean server.</li>     * </ul>     * <p>Both implementations rely upon specific - and distinct, set of     * mibgen generated methods.     * <p> You can override this method if you need to implement some     * specific policies for minimizing the accesses made to some remote     * underlying resources.     * <p>     *     * @param req   The sub-request that must be handled by this node.     *     * @param depth The depth reached in the OID tree.     *     * @exception SnmpStatusException An error occurred while accessing     *  the MIB node.     */    abstract public void get(SnmpMibSubRequest req, int depth)        throws SnmpStatusException;     /**     * Generic handling of the <CODE>set</CODE> operation.     * <p>The actual implementation of this method will be generated     * by mibgen. Usually, this implementation only delegates the     * job to some other provided runtime class, which knows how to     * access the MBean. The current toolkit thus provides two     * implementations:     * <ul><li>The standard implementation will directly access the     *         MBean through a java reference,</li>     *     <li>The generic implementation will access the MBean through     *         the MBean server.</li>     * </ul>     * <p>Both implementations rely upon specific - and distinct, set of     * mibgen generated methods.     * <p> You can override this method if you need to implement some     * specific policies for minimizing the accesses made to some remote     * underlying resources.     * <p>     *     * @param req   The sub-request that must be handled by this node.     *     * @param depth The depth reached in the OID tree.     *     * @exception SnmpStatusException An error occurred while accessing     *  the MIB node.     */    abstract public void set(SnmpMibSubRequest req, int depth)        throws SnmpStatusException;     /**     * Generic handling of the <CODE>check</CODE> operation.     *     * <p>The actual implementation of this method will be generated     * by mibgen. Usually, this implementation only delegates the     * job to some other provided runtime class, which knows how to     * access the MBean. The current toolkit thus provides two     * implementations:     * <ul><li>The standard implementation will directly access the     *         MBean through a java reference,</li>     *     <li>The generic implementation will access the MBean through     *         the MBean server.</li>     * </ul>     * <p>Both implementations rely upon specific - and distinct, set of     * mibgen generated methods.     * <p> You can override this method if you need to implement some     * specific policies for minimizing the accesses made to some remote     * underlying resources, or if you need to implement some consistency     * checks between the different values provided in the varbind list.     * <p>     *     * @param req   The sub-request that must be handled by this node.     *     * @param depth The depth reached in the OID tree.     *     * @exception SnmpStatusException An error occurred while accessing     *  the MIB node.     */    abstract public void check(SnmpMibSubRequest req, int depth)        throws SnmpStatusException; }