/
Objects.java
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/
Objects.java
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/*
* Copyright 2019 OmniFaces
*
* 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.omnifaces.el.functions;
import static org.omnifaces.util.Reflection.toClass;
/**
* Collection of EL functions for objects.
*
* @author Bauke Scholtz
*/
public final class Objects {
// Constructors ---------------------------------------------------------------------------------------------------
private Objects() {
// Hide constructor.
}
// Utility --------------------------------------------------------------------------------------------------------
/**
* Returns the first non-<code>null</code> object from the provided two objects. So, if the first object is not
* <code>null</code>, then it will be returned, otherwise the second object will be returned.
* @param first The first object.
* @param second The second object.
* @return The first non-<code>null</code> object from the provided two objects.
*/
public static Object coalesce(Object first, Object second) {
return first != null ? first : second;
}
/**
* Returns <code>true</code> if given object is an instance of the class as identified by given class name.
* @param className Fully qualified class name of the class for which a class object needs to be created.
* @param object The object to be checked if it is an instance of the created class object.
* @return <code>true</code> if given object is an instance of the class as identified by given class name.
* @since 3.0
*/
public static boolean isInstance(String className, Object object) {
return object != null && toClass(className).isInstance(object);
}
}