Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
 * The software in this package is published under the terms of the CPAL v1.0
 * license, a copy of which has been included with this distribution in the
 * LICENSE.txt file.
 */

import java.lang.reflect.Array;
import java.util.Collection;
import java.util.Iterator;

public class Main {
    /**
     * Creates an array of the given Collection's elements, but with the given
     * <code>Class</code> as element type. Useful for arrays of objects that
     * implement multiple interfaces and a "typed view" onto these objects is
     * required.
     * 
     * @param objects a Collection of objects
     * @param clazz the desired service type of the new array
     * @return <code>null</code> when objects is <code>null</code>, or a new
     *         array containing the elements of the source array which is typed to
     *         the given <code>clazz</code> parameter.
     * @throws IllegalArgumentException if the <code>clazz</code> argument is
     *             <code>null</code>.
     * @throws ArrayStoreException if the elements in <code>objects</code> cannot
     *             be cast to <code>clazz</code>.
     */
    public static <T> T[] toArrayOfComponentType(Collection objects, Class<T> clazz) {
        if (objects == null) {
            return null;
        }

        if (clazz == null) {
            throw new IllegalArgumentException("Array target class must not be null");
        }

        if (objects.isEmpty()) {
            return (T[]) Array.newInstance(clazz, 0);
        }

        int i = 0, size = objects.size();
        T[] result = (T[]) Array.newInstance(clazz, size);
        Iterator iter = objects.iterator();

        while (i < size && iter.hasNext()) {
            result[i++] = (T) iter.next();
        }

        return result;
    }
}