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Collections and utilities based on primitives types
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/*
 *  Copyright 2001-2010 Stephen Colebourne
 *
 *  Licensed 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 org.joda.primitives;

import java.util.Collection;
import java.util.Iterator;

import org.joda.primitives.collection.LongCollection;

/**
 * Provides utility methods and constants for long.
 * 
 * @author Stephen Colebourne
 * @author Jason Tiscione
 * @version CODE GENERATED
 * @since 1.0
 */
public class LongUtils {
    // This file is CODE GENERATED. Do not change manually.
    
    /**
     * Immutable empty array.
     */
    public static final long[] EMPTY_LONG_ARRAY = new long[0];
    
    /**
     * Constructor that should not usually be used.
     */
    public LongUtils() {
        super();
    }

    /**
     * Wraps an long with an Object wrapper.
     * 
     * @param value  the primitive value
     * @return the Object wrapper
     */
    public static Long toObject(long value) {
        return new Long(value);
    }

    /**
     * Unwraps the Long to retrieve the primitive long.
     * 
     * @param value  the Object wrapper, must not be null
     * @return the primitive value
     * @throws NullPointerException if the value if null
     * @throws ClassCastException if the object is not Long
     */
    public static long toPrimitive(Object value) {
        return ((Long) value).longValue();
    }

    /**
     * Unwraps a Collection to retrieve the primitive long.
     * 
     * @param coll  the Collection of Long, must not be null
     * @return the primitive value array
     * @throws NullPointerException if the collection if null
     * @throws ClassCastException if any object is not Long
     */
    public static long[] toPrimitiveArray(Collection  coll) {
        if (coll instanceof LongCollection) {
            return ((LongCollection) coll).toLongArray();
        }
        long[] result = new long[coll.size()];
        int i = 0;
        for (Iterator it = coll.iterator(); it.hasNext(); i++) {
            Long value = (Long) it.next();
            result[i] = value.longValue();
        }
        return result;
    }

}