examples/camel-example-any23/src/main/java/org/apache/camel/example/any23/Any23RouteBuilder.java

/*
 * 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.camel.example.any23;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.model.dataformat.Any23Type;
import org.eclipse.rdf4j.model.IRI;
import org.eclipse.rdf4j.model.Model;
import org.eclipse.rdf4j.model.Value;
import org.eclipse.rdf4j.model.ValueFactory;
import org.eclipse.rdf4j.model.impl.SimpleValueFactory;

public class Any23RouteBuilder extends RouteBuilder {

    private static final String BASEURI = "http://mock.foo/bar";

    @Override
    public void configure() {

        from("direct:start").log("Querying dbpedia:Ecuador ").to("http://dbpedia.org/page/Ecuador").unmarshal().any23(BASEURI).process(new Processor() {
            public void process(Exchange exchange) throws Exception {
                ValueFactory vf = SimpleValueFactory.getInstance();
                Model model = exchange.getIn().getBody(Model.class);

                // Selecting the leaders of Ecuador
                IRI propertyLeader = vf.createIRI("http://dbpedia.org/ontology/leader");
                Set<Value> leadersResources = model.filter(null, propertyLeader, null).objects();
                List<String> leadersList = new ArrayList<>();
                for (Value leader : leadersResources) {
                    // Transform the leader resource (URI) into an broweable
                    // URL.
                    // For instance:
                    // http://dbpedia.org/resource/Oswaldo_Guayasam%C3%ADn -->
                    // http://dbpedia.org/page/Oswaldo_Guayasam%C3%ADn
                    String aLeader = leader.stringValue().replace("resource", "page");
                    leadersList.add(aLeader);
                }
                exchange.getIn().setBody(leadersList);

            }
        }).log(" Content: ${body} ")
            // Process each leader in a separate route.
            // In order to extract more information.
            .split(simple("${body}")).to("direct:extractMoreData");

        from("direct:extractMoreData").log("Split ${body}").toD("${body}").unmarshal()
            // Extract RDF data of the leaders as JSONLD
            .any23(BASEURI, Any23Type.JSONLD).log(" Result : ${body} ").to("log:result");
    }

}