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.camel.reifier.transformer;
018
019import java.util.HashMap;
020import java.util.Map;
021import java.util.function.BiFunction;
022
023import org.apache.camel.CamelContext;
024import org.apache.camel.model.transformer.CustomTransformerDefinition;
025import org.apache.camel.model.transformer.DataFormatTransformerDefinition;
026import org.apache.camel.model.transformer.EndpointTransformerDefinition;
027import org.apache.camel.model.transformer.TransformerDefinition;
028import org.apache.camel.reifier.AbstractReifier;
029import org.apache.camel.spi.ReifierStrategy;
030import org.apache.camel.spi.Transformer;
031
032public abstract class TransformerReifier<T> extends AbstractReifier {
033
034    private static final Map<Class<?>, BiFunction<CamelContext, TransformerDefinition, TransformerReifier<? extends TransformerDefinition>>> TRANSFORMERS;
035    static {
036        Map<Class<?>, BiFunction<CamelContext, TransformerDefinition, TransformerReifier<? extends TransformerDefinition>>> map = new HashMap<>();
037        map.put(CustomTransformerDefinition.class, CustomTransformeReifier::new);
038        map.put(DataFormatTransformerDefinition.class, DataFormatTransformerReifier::new);
039        map.put(EndpointTransformerDefinition.class, EndpointTransformeReifier::new);
040        TRANSFORMERS = map;
041        ReifierStrategy.addReifierClearer(TransformerReifier::clearReifiers);
042    }
043
044    protected final T definition;
045
046    public TransformerReifier(CamelContext camelContext, T definition) {
047        super(camelContext);
048        this.definition = definition;
049    }
050
051    public static TransformerReifier<? extends TransformerDefinition> reifier(CamelContext camelContext, TransformerDefinition definition) {
052        BiFunction<CamelContext, TransformerDefinition, TransformerReifier<? extends TransformerDefinition>> reifier = TRANSFORMERS.get(definition.getClass());
053        if (reifier != null) {
054            return reifier.apply(camelContext, definition);
055        }
056        throw new IllegalStateException("Unsupported definition: " + definition);
057    }
058
059    public static void clearReifiers() {
060        TRANSFORMERS.clear();
061    }
062
063    public Transformer createTransformer() {
064        return doCreateTransformer();
065    }
066
067    protected abstract Transformer doCreateTransformer();
068
069}