org.springframework.util.function.SupplierUtils Maven / Gradle / Ivy
/*
* Copyright 2002-2018 the original author or authors.
*
* 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.springframework.util.function;
import java.util.function.Supplier;
import org.springframework.lang.Nullable;
/**
* Convenience utilities for {@link java.util.function.Supplier} handling.
*
* @author Juergen Hoeller
* @since 5.1
* @see SingletonSupplier
*/
public abstract class SupplierUtils {
/**
* Resolve the given {@code Supplier}, getting its result or immediately
* returning {@code null} if the supplier itself was {@code null}.
* @param supplier the supplier to resolve
* @return the supplier's result, or {@code null} if none
*/
@Nullable
public static T resolve(@Nullable Supplier supplier) {
return (supplier != null ? supplier.get() : null);
}
}