forked from voldemort/voldemort
/
NodeValue.java
94 lines (76 loc) · 2.45 KB
/
NodeValue.java
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/*
* Copyright 2008-2009 LinkedIn, Inc
*
* 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 voldemort.store.routed;
import java.io.Serializable;
import voldemort.versioning.Version;
import voldemort.versioning.Versioned;
import com.google.common.base.Objects;
import com.google.common.base.Preconditions;
/**
* A wrapper around a node id, key and value. This class represents one
* key/value as fetched from a single server.
*
*
* @param <K> The type of the key
* @param <V> The type of the value
*
*/
public final class NodeValue<K, V> implements Serializable, Cloneable {
// TODO: Rename NodeValue to NodeKeyValue
private static final long serialVersionUID = 1;
private final int nodeId;
private final K key;
private final Versioned<V> value;
public NodeValue(int nodeId, K key, Versioned<V> value) {
this.nodeId = nodeId;
this.key = Preconditions.checkNotNull(key);
this.value = Preconditions.checkNotNull(value);
}
public int getNodeId() {
return nodeId;
}
public K getKey() {
return key;
}
public Versioned<V> getVersioned() {
return value;
}
public Version getVersion() {
return value.getVersion();
}
@Override
public NodeValue<K, V> clone() {
return new NodeValue<K, V>(nodeId, key, value);
}
@Override
public String toString() {
return "NodeValue(id=" + nodeId + ", key=" + key + ", versioned= " + value + ")";
}
@Override
public int hashCode() {
return Objects.hashCode(nodeId, key, value.getVersion());
}
@Override
public boolean equals(Object o) {
if(o == this)
return true;
if(!(o instanceof NodeValue<?, ?>))
return false;
NodeValue<?, ?> v = (NodeValue<?, ?>) o;
return getNodeId() == v.getNodeId() && Objects.equal(getKey(), v.getKey())
&& Objects.equal(getVersion(), v.getVersion());
}
}