com.azure.cosmos.implementation.apachecommons.collections.iterators.AbstractEmptyIterator Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of azure-cosmos Show documentation

This Package contains Microsoft Azure Cosmos SDK (with Reactive Extension Reactor support) for Azure Cosmos DB SQL API

There is a newer version: 4.60.0

/*
 * 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.
 */

/*
 * Portions Copyright (c) Microsoft Corporation
 */

package com.azure.cosmos.implementation.apachecommons.collections.iterators;

import java.util.NoSuchElementException;

abstract class AbstractEmptyIterator {
    /**
     * Constructor.
     */
    protected AbstractEmptyIterator() {
        super();
    }

    public boolean hasNext() {
        return false;
    }

    public E next() {
        throw new NoSuchElementException("Iterator contains no elements");
    }

    public boolean hasPrevious() {
        return false;
    }

    public E previous() {
        throw new NoSuchElementException("Iterator contains no elements");
    }

    public int nextIndex() {
        return 0;
    }

    public int previousIndex() {
        return -1;
    }

    public void add(final E obj) {
        throw new UnsupportedOperationException("add() not supported for empty Iterator");
    }

    public void set(final E obj) {
        throw new IllegalStateException("Iterator contains no elements");
    }

    public void remove() {
        throw new IllegalStateException("Iterator contains no elements");
    }

    public void reset() {
        // do nothing
    }
}