org.jnario.lib.JnarioIteratorExtensions.java Source code

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Here is the source code for org.jnario.lib.JnarioIteratorExtensions.java

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/*******************************************************************************
 * Copyright (c) 2012 BMW Car IT and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *******************************************************************************/
package org.jnario.lib;

import static com.google.common.collect.Iterators.filter;

import java.util.Iterator;

import com.google.common.collect.Iterators;

public class JnarioIteratorExtensions {

    /**
      * Returns the element at the specified position in the arguments.
      *
      * @param index index of the element to return
      * @return the element at the specified position in this argument list
      * @throws IndexOutOfBoundsException if the index is out of range
      *         (<tt>index &lt; 0 || index &gt;= size()</tt>)
      */
    public static <T> T get(Iterator<T> iterator, int index) {
        return Iterators.get(iterator, index);
    }

    /**
     * @return the first argument
     */
    public static <T> T first(Iterator<T> iterator) {
        return get(iterator, 0);
    }

    /**
     * @return the second argument
     */
    public static <T> T second(Iterator<T> iterator) {
        return get(iterator, 1);
    }

    /**
     * @return the third argument
     */
    public static <T> T third(Iterator<T> iterator) {
        return get(iterator, 2);
    }

    /**
     * @return the forth argument
     */
    public static <T> T forth(Iterator<T> iterator) {
        return get(iterator, 3);
    }

    /**
     * @return the fifth argument
     */
    public static <T> T fifth(Iterator<T> iterator) {
        return get(iterator, 4);
    }

    /**
     * @return the first argument with the specified type
     */
    public static <T> T first(Iterator<?> iterator, Class<T> type) {
        return first(filter(iterator, type));
    }

    /**
     * @return the second argument with the specified type
     */
    public static <T> T second(Iterator<?> iterator, Class<T> type) {
        return second(filter(iterator, type));
    }
}