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jBasics is a collection of useful utility classes for Java. This includes helper for XML, mathematic functions, restful web services helper, pattern oriented programming interfaces and more. Currently Java7 and up is supported. Version 1.0 will required at leaset Java8.

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/*
 * Copyright (c) 2009-2015
 * 	IT-Consulting Stephan Schloepke (http://www.schloepke.de/)
 * 	klemm software consulting Mirko Klemm (http://www.klemm-scs.com/)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.jbasics.arrays;

import org.jbasics.annotation.ImmutableState;
import org.jbasics.annotation.SideEffectFree;
import org.jbasics.annotation.ThreadSafe;

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

@ThreadSafe
@ImmutableState
@SideEffectFree
public class CollectionToArray {

	public static char[] toCharArray(Collection input) {
		char[] result = new char[input.size()];
		int i=0;
		for(Character val : input) {
			result[i++] = val == null ? 0 : val;
		}
		return result;
	}

	public static byte[] toByteArray(Collection input) {
		byte[] result = new byte[input.size()];
		int i=0;
		for(Number val : input) {
			result[i++] = val == null ? 0 : val.byteValue();
		}
		return result;
	}

	public static short[] toShortArray(Collection input) {
		short[] result = new short[input.size()];
		int i=0;
		for(Number val : input) {
			result[i++] = val == null ? 0 : val.shortValue();
		}
		return result;
	}

	public static int[] toIntArray(Collection input) {
		int[] result = new int[input.size()];
		int i=0;
		for(Number val : input) {
			result[i++] = val == null ? 0 : val.intValue();
		}
		return result;
	}

	public static long[] toLongArray(Collection input) {
		long[] result = new long[input.size()];
		int i=0;
		for(Number val : input) {
			result[i++] = val == null ? 0L : val.longValue();
		}
		return result;
	}

	public static float[] toFloatArray(Collection input) {
		float[] result = new float[input.size()];
		int i=0;
		for(Number val : input) {
			result[i++] = val == null ? Float.NaN : val.floatValue();
		}
		return result;
	}

	public static double[] toDoubleArray(Collection input) {
		double[] result = new double[input.size()];
		int i=0;
		for(Number val : input) {
			result[i++] = val == null ? Double.NaN : val.doubleValue();
		}
		return result;
	}

	public static  T[] toArray(Collection input, Class type) {
		T[] result = (T[])Array.newInstance(type, input.size());
		int i=0;
		for(T val : input) {
			result[i++] = val;
		}
		return result;
	}

}