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.component.language;
018
019import java.net.URLDecoder;
020import java.util.Map;
021
022import org.apache.camel.Endpoint;
023import org.apache.camel.impl.UriEndpointComponent;
024import org.apache.camel.spi.Language;
025import org.apache.camel.util.ObjectHelper;
026import org.apache.camel.util.ResourceHelper;
027
028/**
029 * The <a href="http://camel.apache.org/language-component.html">Language component</a> enables sending
030 * {@link org.apache.camel.Exchange}s to a given language in order to have a script executed.
031 *
032 * @version 
033 */
034public class LanguageComponent extends UriEndpointComponent {
035
036    public static final String RESOURCE = "resource:";
037
038    public LanguageComponent() {
039        super(LanguageEndpoint.class);
040    }
041
042    protected Endpoint createEndpoint(String uri, String remaining, Map<String, Object> parameters) throws Exception {
043        String name = ObjectHelper.before(remaining, ":");
044        String script = ObjectHelper.after(remaining, ":");
045        // no script then remaining is the language name
046        if (name == null && script == null) {
047            name = remaining;
048        }
049
050        if (ObjectHelper.isEmpty(name)) {
051            throw new IllegalArgumentException("Illegal syntax. Name of language not given in uri: " + uri);
052        }
053        Language language = getCamelContext().resolveLanguage(name);
054
055        String resourceUri = null;
056        String resource = script;
057        if (resource != null) {
058            if (resource.startsWith(RESOURCE)) {
059                resource = resource.substring(RESOURCE.length());
060            }
061            if (ResourceHelper.hasScheme(resource)) {
062                // the script is a uri for a resource
063                resourceUri = resource;
064                // then the script should be null
065                script = null;
066            } else {
067                // the script is provided as text in the uri, so decode to utf-8
068                script = URLDecoder.decode(script, "UTF-8");
069                // then the resource should be null
070                resourceUri = null;
071            }
072        }
073
074        LanguageEndpoint endpoint = new LanguageEndpoint(uri, this, language, null, resourceUri);
075        endpoint.setScript(script);
076        setProperties(endpoint, parameters);
077        return endpoint;
078    }
079
080}