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     */
017    package org.apache.camel.component.language;
018    
019    import java.net.URLDecoder;
020    import java.util.Map;
021    
022    import org.apache.camel.Endpoint;
023    import org.apache.camel.Expression;
024    import org.apache.camel.impl.DefaultComponent;
025    import org.apache.camel.spi.Language;
026    import org.apache.camel.util.ObjectHelper;
027    import org.apache.camel.util.ResourceHelper;
028    
029    /**
030     * The <a href="http://camel.apache.org/language-component.html">language component</a> to send
031     * {@link org.apache.camel.Exchange}s to a given language and have the script being executed.
032     *
033     * @version 
034     */
035    public class LanguageComponent extends DefaultComponent {
036    
037        protected Endpoint createEndpoint(String uri, String remaining, Map<String, Object> parameters) throws Exception {
038            String name = ObjectHelper.before(remaining, ":");
039            String script = ObjectHelper.after(remaining, ":");
040            // no script then remaining is the language name
041            if (name == null && script == null) {
042                name = remaining;
043            }
044    
045            if (ObjectHelper.isEmpty(name)) {
046                throw new IllegalArgumentException("Illegal syntax. Name of language not given in uri: " + uri);
047            }
048            Language language = getCamelContext().resolveLanguage(name);
049    
050            Expression expression = null;
051            String resourceUri = null;
052            if (script != null) {
053                if (ResourceHelper.hasScheme(script)) {
054                    // the script is a uri for a resource
055                    resourceUri = script;
056                } else {
057                    // the script is provided as text in the uri, so decode to utf-8
058                    expression = language.createExpression(URLDecoder.decode(script, "UTF-8"));
059                }
060            }
061    
062            return new LanguageEndpoint(uri, this, language, expression, resourceUri);
063        }
064    }