001 /* 002 * Copyright (C) 2007 The Guava Authors 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017 package com.google.common.base; 018 019 import com.google.common.annotations.GwtCompatible; 020 021 /** 022 * A class that can supply objects of a single type. Semantically, this could 023 * be a factory, generator, builder, closure, or something else entirely. No 024 * guarantees are implied by this interface. 025 * 026 * @author Harry Heymann 027 * @since 2 (imported from Google Collections Library) 028 */ 029 @GwtCompatible 030 public interface Supplier<T> { 031 /** 032 * Retrieves an instance of the appropriate type. The returned object may or 033 * may not be a new instance, depending on the implementation. 034 * 035 * @return an instance of the appropriate type 036 */ 037 T get(); 038 }