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.Function;
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.spi.Transformer;
029
030public abstract class TransformerReifier<T> {
031
032    private static final Map<Class<?>, Function<TransformerDefinition, TransformerReifier<? extends TransformerDefinition>>> TRANSFORMERS;
033    static {
034        Map<Class<?>, Function<TransformerDefinition, TransformerReifier<? extends TransformerDefinition>>> map = new HashMap<>();
035        map.put(CustomTransformerDefinition.class, CustomTransformeReifier::new);
036        map.put(DataFormatTransformerDefinition.class, DataFormatTransformeReifier::new);
037        map.put(EndpointTransformerDefinition.class, EndpointTransformeReifier::new);
038        TRANSFORMERS = map;
039    }
040
041    protected final T definition;
042
043    public TransformerReifier(T definition) {
044        this.definition = definition;
045    }
046
047    public static TransformerReifier<? extends TransformerDefinition> reifier(TransformerDefinition definition) {
048        Function<TransformerDefinition, TransformerReifier<? extends TransformerDefinition>> reifier = TRANSFORMERS.get(definition.getClass());
049        if (reifier != null) {
050            return reifier.apply(definition);
051        }
052        throw new IllegalStateException("Unsupported definition: " + definition);
053    }
054
055    public Transformer createTransformer(CamelContext context) throws Exception {
056        return doCreateTransformer(context);
057    }
058
059    protected abstract Transformer doCreateTransformer(CamelContext context) throws Exception;
060
061}