001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.juneau.rest;
018
019import java.util.function.*;
020
021/**
022 * A supplier of a REST resource bean.
023 *
024 * <p>
025 * Pretty much just a normal supplier, but wrapped in a concrete class so that it can be retrieved by class name.
026 */
027public class ResourceSupplier implements Supplier<Object> {
028
029   private final Supplier<?> supplier;
030   private final Class<?> resourceClass;
031
032   /**
033    * Constructor.
034    *
035    * @param resourceClass The resource class.
036    *    <br>May or may not be the same as the object returned by the supplier (e.g. supplier returns a proxy).
037    * @param supplier The supplier of the bean.
038    */
039   public ResourceSupplier(Class<?> resourceClass, Supplier<?> supplier) {
040      this.resourceClass = resourceClass;
041      this.supplier = supplier;
042   }
043
044   @Override
045   public Object get() {
046      return supplier.get();
047   }
048
049   /**
050    * Returns the resource class.
051    *
052    * <p>
053    * May or may not be the same as the object returned by the supplier (e.g. supplier returns a proxy).
054    *
055    * @return The resource class.
056    */
057   public Class<?> getResourceClass() { return resourceClass; }
058}