Java Collection Check isCollectionType(Class cls)

Description

Checks if provided class represents an array class or is implementation of java.util.Collection .

License

Apache License

Parameter

Parameter	Description
cls	class to check

Return

true if cls is implementation of or represents an array class, false - otherwise

Declaration

public static boolean isCollectionType(Class<?> cls) 

Method Source Code

//package com.java2s;
/*/*w w w  . ja v  a  2s  . c  o m*/
 * Copyright 2014-2017 JKOOL, 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.*;

public class Main {
    /**
     * Checks if provided class represents an array class or is implementation of {@link java.util.Collection}.
     *
     * @param cls
     *            class to check
     * @return {@code true} if cls is implementation of {@link java.util.Collection} or represents an array class,
     *         {@code false} - otherwise
     */
    public static boolean isCollectionType(Class<?> cls) {
        return cls != null && (cls.isArray() || Collection.class.isAssignableFrom(cls));
    }

    /**
     * Checks if provided object is an array - of primitives or objects.
     *
     * @param obj
     *            object to check
     * @return {@code true} if obj is an array, {@code false} - otherwise
     */
    public static boolean isArray(Object obj) {
        return obj instanceof Object[] || (obj != null && obj.getClass().isArray());
    }
}

Related

1. isCollectionOrArray(final Class cls)
2. isCollectionOrArray(final Object obj)
3. isCollectionOrArrayType(Class typeToCheck)
4. isCollectionType(Class aClass)
5. isCollectionType(Class type)
6. isCollectionType(Class cls)
7. isCollectionType(Class type)
8. isCollectionType(final Class cls)
9. isCollectionType(Object obj)