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      1 /*
      2  * Copyright (C) 2007 Google Inc.
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  * http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.google.common.base;
     18 
     19 import com.google.common.annotations.GwtCompatible;
     20 
     21 /**
     22  * A class that can supply objects of a single type.  Semantically, this could
     23  * be a factory, generator, builder, closure, or something else entirely. No
     24  * guarantees are implied by this interface.
     25  *
     26  * @author Harry Heymann
     27  * @since 2010.01.04 <b>stable</b> (imported from Google Collections Library)
     28  */
     29 @GwtCompatible
     30 public interface Supplier<T> {
     31   /**
     32    * Retrieves an instance of the appropriate type. The returned object may or
     33    * may not be a new instance, depending on the implementation.
     34    *
     35    * @return an instance of the appropriate type
     36    */
     37   public T get();
     38 }
     39