Java Collection Empty getSingletonCollectionOrEmptyIfNull(T o)

Description

get Singleton Collection Or Empty If Null

License

Apache License

Declaration

public static <T> Collection<T> getSingletonCollectionOrEmptyIfNull(T o) 

Method Source Code

//package com.java2s;
/*/*w ww . j  a v  a  2s . c  o m*/
 * #!
 * Ontopia Engine
 * #-
 * Copyright (C) 2001 - 2013 The Ontopia Project
 * #-
 * 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.
 * !#
 */

import java.util.Collection;
import java.util.Collections;

public class Main {
    public static <T> Collection<T> getSingletonCollectionOrEmptyIfNull(T o) {
        if (o == null)
            return Collections.emptySet();
        else
            return Collections.singleton(o);
    }
}

Related

1. emptyToNull(final Collection value)
2. isAnyEmpty(Collection... collections)
3. isCollectionEmpty(Collection collection)
4. isCollectionEmpty(Collection oneCol)
5. isCollectionEmpty(Collection value)