Java Collection Null nullSafe(Collection collection)

Description

null Safe

License

Apache License

Declaration

public static <T> Collection<T> nullSafe(Collection<T> collection) 

Method Source Code

//package com.java2s;
/*//from  www  . j av  a2 s . co m
 * Copyright 2016 Layne Mobile, LLC
 *
 * 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;
import java.util.List;
import java.util.Set;

public class Main {
    public static <T> Collection<T> nullSafe(Collection<T> collection) {
        return collection == null ? Collections.<T>emptyList() : collection;
    }

    public static <T> List<T> nullSafe(List<T> list) {
        return list == null ? Collections.<T>emptyList() : list;
    }

    public static <T> Set<T> nullSafe(Set<T> set) {
        return set == null ? Collections.<T>emptySet() : set;
    }
}

Related

1. isNull(Collection c)
2. isNull(Collection collection)
3. isNull(Collection collection)
4. isNull(Collection collection)
5. nullSafe(Collection collection)
6. nullSafe(Collection in)
7. nullSafeCollection(Collection source)
8. nullSafeSize(Collection collection)
9. nullSafeSize(final Collection collection)