com.google.common.base.Supplier Maven / Gradle / Ivy
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/*
* Copyright (C) 2007 The Guava 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 com.google.common.base;
import com.google.common.annotations.GwtCompatible;
import org.checkerframework.checker.nullness.qual.Nullable;
/**
* Legacy version of {@link java.util.function.Supplier java.util.function.Supplier}. Semantically,
* this could be a factory, generator, builder, closure, or something else entirely. No guarantees
* are implied by this interface.
*
* The {@link Suppliers} class provides common suppliers and related utilities.
*
*
As this interface extends {@code java.util.function.Supplier}, an instance of this type can be
* used as a {@code java.util.function.Supplier} directly. To use a {@code
* java.util.function.Supplier} in a context where a {@code com.google.common.base.Supplier} is
* needed, use {@code supplier::get}.
*
*
See the Guava User Guide article on the use of {@code Function}.
*
* @author Harry Heymann
* @since 2.0
*/
@GwtCompatible
@FunctionalInterface
@ElementTypesAreNonnullByDefault
public interface Supplier extends java.util.function.Supplier {
/**
* Retrieves an instance of the appropriate type. The returned object may or may not be a new
* instance, depending on the implementation.
*
* @return an instance of the appropriate type
*/
@Override
@ParametricNullness
T get();
}