org.snmp4j.agent.mo.snmp.tc.TextualConvention Maven / Gradle / Ivy
/*_############################################################################
_##
_## SNMP4J-Agent - TextualConvention.java
_##
_## Copyright (C) 2005-2009 Frank Fock (SNMP4J.org)
_##
_## Licensed under the Apache License, Version 2.0 (the "License");
_## you may not use this file except in compliance with the License.
_## You may obtain a copy of the License at
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_## http://www.apache.org/licenses/LICENSE-2.0
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_## Unless required by applicable law or agreed to in writing, software
_## distributed under the License is distributed on an "AS IS" BASIS,
_## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
_## See the License for the specific language governing permissions and
_## limitations under the License.
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_##########################################################################*/
package org.snmp4j.agent.mo.snmp.tc;
import org.snmp4j.smi.OID;
import org.snmp4j.agent.MOAccess;
import org.snmp4j.smi.Variable;
import org.snmp4j.agent.mo.MOScalar;
import org.snmp4j.agent.mo.MOColumn;
/**
* The TextualConvention interface defines the common properties
* of SMI textual conventions needed to use them across different MIB modules
* within an agent implementation.
*
* A textual convention is characterized by its name and the MIB module name
* where it has been defined. With these attributes a TC registry is able to
* lookup TC implementations by name.
*
* A MOFactory can then use a TC name to lookup its implementation
* and then use one of the two factory methods of each TC to create either
* a scalar or columnar ManagedObject instance.
*
* If you need to use your own TC implementations (either replacing/extending
* already provided ones or adding new ones) then register them to the
* MOFactory you are using.
*
* @author Frank Fock
* @version 1.3
*/
public interface TextualConvention {
/**
* Returns the MIB module name that defined this textual convention.
* @return
* an unique module name
*/
String getModuleName();
/**
* Returns the name of the textual convention as defined in the MIB module.
* @return
* the unique name (within the MIB module) of the TC.
*/
String getName();
/**
* Creates a MOScalar instance of this TC specified by OID, access, and
* optional value.
* @param oid
* the OID of the scalar isntance.
* @param access
* the access definition.
* @param value
* the Variable instance containing the value of the
* scalar. If value is null, the TC should create
* an initial value with {@link #createInitialValue()}.
* @return
* a MOScalar instance.
*/
MOScalar createScalar(OID oid, MOAccess access, Variable value);
/**
* Creates a MOColumn instance of this TC specified by the column ID,
* access, default value, and mutable flag.
* @param columnID
* the column id as defined in the MIB module (typically starting at one).
* @param access
* the access definition.
* @param defaultValue
* the default value or null if there is no DEFVAL clause for
* this column.
* @param mutableInService
* true if this column may be modified while row is in
* service.
* @return
* the MOColumn created.
*/
MOColumn createColumn(int columnID, int syntax, MOAccess access,
Variable defaultValue, boolean mutableInService);
/**
* Creates an initial value for an object instance of this textual convention.
* @return
* a Variable instance with a valid value (according to this TC).
* @since 1.3
*/
Variable createInitialValue();
}