/**
* 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.hadoop.hdfs.server.common;
import java.io.IOException;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.hdfs.server.common.UpgradeObjectCollection.UOSignature;
/**
* Abstract upgrade object.
*
* Contains default implementation of common methods of {@link Upgradeable}
* interface.
*/
@InterfaceAudience.Private
public abstract class UpgradeObject implements Upgradeable {
protected short status;
@Override
public short getUpgradeStatus() {
return status;
}
@Override
public String getDescription() {
return "Upgrade object for " + getType() + " layout version " + getVersion();
}
@Override
public UpgradeStatusReport getUpgradeStatusReport(boolean details)
throws IOException {
return new UpgradeStatusReport(getVersion(), getUpgradeStatus(), false);
}
@Override
public int compareTo(Upgradeable o) {
if(this.getVersion() != o.getVersion())
return (getVersion() > o.getVersion() ? -1 : 1);
int res = this.getType().toString().compareTo(o.getType().toString());
if(res != 0)
return res;
return getClass().getCanonicalName().compareTo(
o.getClass().getCanonicalName());
}
@Override
public boolean equals(Object o) {
if (!(o instanceof UpgradeObject)) {
return false;
}
return this.compareTo((UpgradeObject)o) == 0;
}
@Override
public int hashCode() {
return new UOSignature(this).hashCode();
}
}