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* Copyright (c) 2000, 2007, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
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*/
package com.sun.jmx.snmp.agent;
// java imports
//
import com.sun.jmx.snmp.SnmpDefinitions;
import java.io.Serializable;
import com.sun.jmx.snmp.SnmpStatusException;
/**
* 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 new SnmpStatusException(SnmpDefinitions.snmpRspNoSuchName);
}
}
/**
* 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;
}