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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.giraph.factories;
import org.apache.giraph.conf.GiraphConfigurationSettable;
import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration;
import org.apache.giraph.utils.WritableUtils;
import org.apache.hadoop.io.Writable;
/**
* Default {@link VertexValueFactory} that simply uses the default
* constructor for the vertex value class.
*
* @param <V> Vertex value
*/
public class DefaultVertexValueFactory<V extends Writable>
implements VertexValueFactory<V>, GiraphConfigurationSettable {
/** Cached vertex value class. */
private Class<V> vertexValueClass;
/** Configuration */
private ImmutableClassesGiraphConfiguration conf;
@Override
public void setConf(ImmutableClassesGiraphConfiguration conf) {
this.conf = conf;
vertexValueClass = conf.getVertexValueClass();
}
@Override
public V newInstance() {
return WritableUtils.createWritable(vertexValueClass, conf);
}
}