001/*
002 * Licensed to DuraSpace under one or more contributor license agreements.
003 * See the NOTICE file distributed with this work for additional information
004 * regarding copyright ownership.
005 *
006 * DuraSpace licenses this file to you under the Apache License,
007 * Version 2.0 (the "License"); you may not use this file except in
008 * compliance with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.fcrepo.transform;
019
020import org.fcrepo.transform.transformations.LDPathTransform;
021import org.fcrepo.transform.transformations.SparqlQueryTransform;
022
023import javax.ws.rs.core.MediaType;
024
025import java.io.InputStream;
026import java.util.HashMap;
027import java.util.Map;
028import java.util.function.Function;
029
030import static org.apache.jena.riot.WebContent.contentTypeSPARQLQuery;
031import static org.fcrepo.transform.transformations.LDPathTransform.APPLICATION_RDF_LDPATH;
032
033/**
034 * Get a Transformation from a MediaType
035 *
036 * @author cbeer
037 * @author ajs6f
038 */
039public class TransformationFactory {
040
041    @SuppressWarnings("rawtypes")
042    private final Map<String, Function<InputStream, Transformation>> mimeToTransform = new HashMap<>();
043
044    /**
045     * Get a new TransformationFactory with the default classes
046     * @throws SecurityException if security exception occurred
047     */
048    public TransformationFactory() {
049        mimeToTransform.put(contentTypeSPARQLQuery, SparqlQueryTransform::new);
050        mimeToTransform.put(APPLICATION_RDF_LDPATH, LDPathTransform::new);
051    }
052
053    /**
054     * Get a Transformation from a MediaType and an InputStream with
055     * the transform program
056     * @param <T> the transformation type
057     * @param contentType the content type
058     * @param inputStream the input stream
059     * @return T a Transformation
060     */
061    @SuppressWarnings("unchecked")
062    public <T> Transformation<T> getTransform(final MediaType contentType, final InputStream inputStream) {
063        final String mimeType = contentType.toString();
064        if (mimeToTransform.containsKey(mimeType)) {
065            return mimeToTransform.get(contentType.toString()).apply(inputStream);
066        }
067        throw new UnsupportedOperationException(
068                "No transform type exists for media type " + mimeType + "!");
069    }
070}