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;
027import org.apache.camel.util.StringHelper;
028
029/**
030 * The <a href="http://camel.apache.org/language-component.html">Language component</a> enables sending
031 * {@link org.apache.camel.Exchange}s to a given language in order to have a script executed.
032 *
033 * @version 
034 */
035public class LanguageComponent extends UriEndpointComponent {
036
037    public static final String RESOURCE = "resource:";
038
039    public LanguageComponent() {
040        super(LanguageEndpoint.class);
041    }
042
043    protected Endpoint createEndpoint(String uri, String remaining, Map<String, Object> parameters) throws Exception {
044        String name = StringHelper.before(remaining, ":");
045        String script = StringHelper.after(remaining, ":");
046        // no script then remaining is the language name
047        if (name == null && script == null) {
048            name = remaining;
049        }
050
051        if (ObjectHelper.isEmpty(name)) {
052            throw new IllegalArgumentException("Illegal syntax. Name of language not given in uri: " + uri);
053        }
054        Language language = getCamelContext().resolveLanguage(name);
055
056        String resourceUri = null;
057        String resource = script;
058        if (resource != null) {
059            if (resource.startsWith(RESOURCE)) {
060                resource = resource.substring(RESOURCE.length());
061            }
062            if (ResourceHelper.hasScheme(resource)) {
063                // the script is a uri for a resource
064                resourceUri = resource;
065                // then the script should be null
066                script = null;
067            } else {
068                // the script is provided as text in the uri, so decode to utf-8
069                script = URLDecoder.decode(script, "UTF-8");
070                // then the resource should be null
071                resourceUri = null;
072            }
073        }
074
075        LanguageEndpoint endpoint = new LanguageEndpoint(uri, this, language, null, resourceUri);
076        endpoint.setScript(script);
077        setProperties(endpoint, parameters);
078        return endpoint;
079    }
080
081}