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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 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.
A Writable encapsulating an item and a preference value.
public final class ItemPrefWritable implements Writable {
  private long itemID;
  private float prefValue;
  public ItemPrefWritable() {
    // do nothing
  public ItemPrefWritable(long itemIDfloat prefValue) {
    this. = itemID;
    this. = prefValue;
  public ItemPrefWritable(ItemPrefWritable other) {
    this(other.getItemID(), other.getPrefValue());
  public long getItemID() {
    return ;
  public float getPrefValue() {
    return ;
  public void write(DataOutput outthrows IOException {
  public void readFields(DataInput inthrows IOException {
     = in.readLong();
     = in.readFloat();
  public static ItemPrefWritable read(DataInput inthrows IOException {
    ItemPrefWritable writable = new ItemPrefWritable();
    return writable;
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