/*
 *  Copyright 2011 Eric F. Savage, code@efsavage.com
 *
 *   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.
 */
/*
 *  Copyright 2011 Eric F. Savage, code@efsavage.com
 *
 *   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 com.ajah.util;

import java.util.Collection;

/**
 * Utilities for dealing with members of the Collections API.
 * 
 * @author <a href="http://efsavage.com">Eric F. Savage</a>, <a
 *         href="mailto:code@efsavage.com">code@efsavage.com</a>.
 */
public class CollectionUtils {

	/**
	 * Checks to see if a collection is null or empty.
	 * 
	 * @param collection
	 *            Collection to test, may be null.
	 * @return true if the collection is null or empty, otherwise false.
	 */
	public static boolean isEmpty(final Collection<?> collection) {
		return collection == null || collection.size() < 1;
	}

}

@@ -1885,10 +1885,360 @@
  1;%0A%09%7D%0A%0A
+%09/**%0A%09 * Returns null if the supplied collection is empty.%0A%09 * %0A%09 * @param collection%0A%09 *            The collection to test.%0A%09 * @return The original collection if not empty, otherwise null.%0A%09 */%0A%09public static %3CT, C extends Collection%3CT%3E%3E C nullIfEmpty(final C collection) %7B%0A%09%09if (isEmpty(collection)) %7B%0A%09%09%09return null;%0A%09%09%7D%0A%09%09return collection;%0A%09%7D%0A%0A
 %7D%0A

Add nullIfEmpty()