org.apache.mahout.cf.taste.impl.common.Retriever Maven / Gradle / Ivy

/**
 * 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.mahout.cf.taste.impl.common;

import org.apache.mahout.cf.taste.common.TasteException;

/**
 * 
 * Implementations can retrieve a value for a given key.
 * 
 */
public interface Retriever {
  
  /**
   * @param key key for which a value should be retrieved
   * @return value for key
   * @throws TasteException if an error occurs while retrieving the value
   */
  V get(K key) throws TasteException;
  
}