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/*_############################################################################
  _## 
  _##  SNMP4J-Agent - TimeStampTC.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
  _##  
  _##      http://www.apache.org/licenses/LICENSE-2.0
  _##  
  _##  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.
  _##  
  _##########################################################################*/

package org.snmp4j.agent.mo.snmp.tc;

import org.snmp4j.agent.*;
import org.snmp4j.agent.mo.*;
import org.snmp4j.smi.*;
import org.snmp4j.agent.mo.snmp.TimeStamp;
import org.snmp4j.agent.mo.snmp.TimeStampScalar;
import org.snmp4j.agent.mo.snmp.SNMPv2MIB;
import org.snmp4j.agent.mo.snmp.SNMPv2TC;

public class TimeStampTC implements TextualConvention {

  private OctetString defaultContext;

  public TimeStampTC() {
  }

  /**
   * Creates a TimestampTC that uses sysUpTime from the specified
   * context.
   *
   * @param defaultContext
   *    the context to be used to provide the sysUpTime for time stamp TCs
   *    created by this factory.
   * @since 1.1
   */
  public TimeStampTC(OctetString defaultContext) {
    this.defaultContext = defaultContext;
  }

  public MOColumn createColumn(int columnID, int syntax, MOAccess access,
                               Variable defaultValue,
                               boolean mutableInService) {
    return new TimeStamp(columnID, access,
                         SNMPv2MIB.getSysUpTime(defaultContext));
  }

  public MOScalar createScalar(OID oid, MOAccess access, Variable value) {
    return new TimeStampScalar(oid, access,
                               (TimeTicks)((value == null) ?
                                           createInitialValue() : value),
                               SNMPv2MIB.getSysUpTime(defaultContext));
  }

  public String getModuleName() {
    return SNMPv2TC.MODULE_NAME;
  }

  public String getName() {
    return SNMPv2TC.TIMESTAMP;
  }

  public Variable createInitialValue() {
    return new TimeTicks(0);
  }
}