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.server.arg;
018
019import org.apache.juneau.commons.function.*;
020import org.apache.juneau.commons.reflect.*;
021import org.apache.juneau.marshall.jsonschema.*;
022import org.apache.juneau.marshall.parser.*;
023import org.apache.juneau.marshall.serializer.*;
024import org.apache.juneau.rest.server.*;
025
026/**
027 * Resolves method parameters on {@link RestOp}-annotated Java methods of types found on the {@link RestOpContext} object.
028 *
029 * <ul class='javatree'>
030 *    <li class='jc'>{@link JsonSchemaGenerator}
031 *    <li class='jc'>{@link ParserSet}
032 *    <li class='jc'>{@link RestOpContext}
033 *    <li class='jc'>{@link SerializerSet}
034 * </ul>
035 *
036 * <h5 class='section'>See Also:</h5><ul>
037 *    <li class='link'><a class="doclink" href="https://juneau.apache.org/docs/topics/JavaMethodParameters">Java Method Parameters</a>
038 * </ul>
039 */
040public class RestOpContextArgs extends SimpleRestOperationArg {
041
042   /**
043    * Static creator.
044    *
045    * @param paramInfo The Java method parameter being resolved. Must not be <jk>null</jk>.
046    * @return A new arg, or <jk>null</jk> if the parameter type is not one of the supported types.
047    */
048   public static RestOpContextArgs create(ParameterInfo paramInfo) {
049      if (paramInfo.isType(JsonSchemaGenerator.class))
050         return new RestOpContextArgs(RestOpContext::getJsonSchemaGenerator);
051      if (paramInfo.isType(ParserSet.class))
052         return new RestOpContextArgs(RestOpContext::getParsers);
053      if (paramInfo.isType(RestOpContext.class))
054         return new RestOpContextArgs(x -> x);
055      if (paramInfo.isType(SerializerSet.class))
056         return new RestOpContextArgs(RestOpContext::getSerializers);
057      return null;
058   }
059
060   /**
061    * Constructor.
062    *
063    * @param <T> The function return type.
064    * @param function The function for finding the arg.
065    */
066   protected <T> RestOpContextArgs(ThrowingFunction<RestOpContext,T> function) {
067      super(session -> function.apply(session.getContext()));
068   }
069}