EmptyIterable.java

/*
 * 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 gobblin.util;

import java.util.Iterator;

import com.google.common.collect.ImmutableSet;


/**
 * A type of {@link java.lang.Iterable}s corresponding to empty {@link java.util.Collection}s.
 *
 * @author Yinan Li
 *
 * @param <T> record type
 */
public class EmptyIterable<T> implements Iterable<T> {

  @Override
  public Iterator<T> iterator() {
    return ImmutableSet.<T>of().iterator();
  }
}