/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You 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 org.apache.juneau.utest.utils;
  
  import java.io.*;
  import java.lang.reflect.*;
  
  import org.apache.juneau.*;
  import org.apache.juneau.commons.function.*;
  import org.apache.juneau.commons.reflect.*;
  import org.apache.juneau.httppart.*;
  import org.apache.juneau.parser.*;
  
  /**
   * Utility class for creating mocked reader parsers.
   */
  public class FakeReaderParser extends ReaderParser implements HttpPartParser {
  
  	//-------------------------------------------------------------------------------------------------------------------
  	// Static
  	//-------------------------------------------------------------------------------------------------------------------
  
  	public static Builder create() {
  		return new Builder();
  	}
  
  	//-------------------------------------------------------------------------------------------------------------------
  	// Builder
  	//-------------------------------------------------------------------------------------------------------------------
  
  	public static class Builder extends ReaderParser.Builder {
  		Function3<ReaderParserSession,String,ClassMeta<?>,Object> function;
  		Function4<HttpPartType,HttpPartSchema,String,ClassMeta<?>,Object> partFunction;
  
  		public Builder function(Function3<ReaderParserSession,String,ClassMeta<?>,Object> value) {
  			function = value;
  			return this;
  		}
  
  		public Builder partFunction(Function4<HttpPartType,HttpPartSchema,String,ClassMeta<?>,Object> value) {
  			partFunction = value;
  			return this;
  		}
  
  		@Override
  		public Builder consumes(String value) {
  			super.consumes(value);
  			return this;
  		}
  
  		@Override
  		public Builder copy() {
  			return this;
  		}
  	}
  
  	//-------------------------------------------------------------------------------------------------------------------
  	// Instance
  	//-------------------------------------------------------------------------------------------------------------------
  
  	private final Function3<ReaderParserSession,String,ClassMeta<?>,Object> function;
  	private final Function4<HttpPartType,HttpPartSchema,String,ClassMeta<?>,Object> partFunction;
  
  	public FakeReaderParser(Builder builder) {
  		super(builder);
  		this.function = builder.function;
  		this.partFunction = builder.partFunction;
  	}
  
  	@Override
  	public <T> T doParse(ParserSession session, ParserPipe pipe, ClassMeta<T> type) throws IOException, ParseException, ExecutableException {
  		if (function != null)
  			return type.cast(function.apply((ReaderParserSession)session, pipe.asString(), type));
  		return null;
  	}
  
  	@Override
  	public HttpPartParserSession getPartSession() {
  		return new HttpPartParserSession() {
  			@Override
  			public <T> T parse(HttpPartType partType, HttpPartSchema schema, String in, ClassMeta<T> toType) throws ParseException, SchemaValidationException {
  				return toType.cast(partFunction.apply(partType, schema, in, toType));
  			}
  		};
 	}
 
 	@Override
 	public <T> ClassMeta<T> getClassMeta(Class<T> c) {
 		return this.getBeanContext().getClassMeta(c);
 	}
 
 	@Override
 	public <T> ClassMeta<T> getClassMeta(Type t, Type... args) {
 		return this.getBeanContext().getClassMeta(t, args);
 	}
 }