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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.qpid.qmf2.common;
// Misc Imports
import java.util.Map;
/**
* This class provides a wrapper for QMF Object IDs to enable easier comparisons.
* <p>
* QMF Object IDs are Maps and <i>in theory</i> equals should work, but strings in QMF are actually often returned
* as byte[] due to inconsistent binary and UTF-8 encodings being used and byte[].equals() compares the address not a
* bytewise comparison.
* <p>
* This class creates a String from the internal ObjectId state information to enable easier comparison and rendering.
*
* @author Fraser Adams
*/
public final class ObjectId extends QmfData
{
private final String _agentName;
private final String _objectName;
private final long _agentEpoch;
/**
* Create an ObjectId given the ID created via ObjectId.toString().
* @param oid a string created via ObjectId.toString().
*/
public ObjectId(String oid)
{
String[] split = oid.split("@");
_agentName = split.length == 3 ? split[0] : "";
_agentEpoch = split.length == 3 ? Long.parseLong(split[1]) : 0;
_objectName = split.length == 3 ? split[2] : "";
setValue("_agent_name", _agentName);
setValue("_agent_epoch", _agentEpoch);
setValue("_object_name", _objectName);
}
/**
* Create an ObjectId given an agentName, objectName and agentEpoch.
* @param agentName the name of the Agent managing the object.
* @param objectName the name of the managed object.
* @param agentEpoch a count used to identify if an Agent has been restarted.
*/
public ObjectId(String agentName, String objectName, long agentEpoch)
{
_agentName = agentName;
_objectName = objectName;
_agentEpoch = agentEpoch;
setValue("_agent_name", _agentName);
setValue("_object_name", _objectName);
setValue("_agent_epoch", _agentEpoch);
}
/**
* Create an ObjectId from a Map. In essence it "deserialises" its state from the Map.
* @param m the Map the Object is retrieving its state from.
*/
public ObjectId(Map m)
{
super(m);
_agentName = getStringValue("_agent_name");
_objectName = getStringValue("_object_name");
_agentEpoch = getLongValue("_agent_epoch");
}
/**
* Create an ObjectId from a QmfData object. In essence it "deserialises" its state from the QmfData object.
* @param qmfd the QmfData the Object is retrieving its state from.
*/
public ObjectId(QmfData qmfd)
{
this(qmfd.mapEncode());
}
/**
* Returns the name of the Agent managing the object.
* @return the name of the Agent managing the object.
*/
public String getAgentName()
{
return _agentName;
}
/**
* Returns the name of the managed object.
* @return the name of the managed object.
*/
public String getObjectName()
{
return _objectName;
}
/**
* Returns the Epoch count.
* @return the Epoch count.
*/
public long getAgentEpoch()
{
return _agentEpoch;
}
/**
* Compares two ObjectId objects for equality.
* @param rhs the right hands side ObjectId in the comparison.
* @return true if the two ObjectId objects are equal otherwise returns false.
*/
@Override
public boolean equals(Object rhs)
{
if (rhs instanceof ObjectId)
{
return toString().equals(rhs.toString());
}
return false;
}
/**
* Returns the ObjectId hashCode.
* @return the ObjectId hashCode.
*/
@Override
public int hashCode()
{
return toString().hashCode();
}
/**
* Returns a String representation of the ObjectId.
* @return a String representation of the ObjectId.
*/
@Override
public String toString()
{
return _agentName + "@" + _agentEpoch + "@" + _objectName;
}
}
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