trunk/camel-core/src/main/java/org/apache/camel/component/language/LanguageComponent.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.component.language;

import java.util.Map;

import org.apache.camel.Endpoint;
import org.apache.camel.Expression;
import org.apache.camel.impl.DefaultComponent;
import org.apache.camel.spi.Language;
import org.apache.camel.util.ObjectHelper;

/**
 * The <a href="http://camel.apache.org/language-component.html">language component</a> to send
 * {@link org.apache.camel.Exchange}s to a given language and have the script being executed.
 *
 * @version 
 */
public class LanguageComponent extends DefaultComponent {

    protected Endpoint createEndpoint(String uri, String remaining, Map<String, Object> parameters) throws Exception {
        String name = ObjectHelper.before(remaining, ":");
        String script = ObjectHelper.after(remaining, ":");
        // no script then remaining is the language name
        if (name == null && script == null) {
            name = remaining;
        }

        if (ObjectHelper.isEmpty(name)) {
            throw new IllegalArgumentException("Illegal syntax. Name of language not given in uri: " + uri);
        }
        Language language = getCamelContext().resolveLanguage(name);

        Expression expression = null;
        if (ObjectHelper.isNotEmpty(script)) {
            expression = language.createExpression(script);
        }

        return new LanguageEndpoint(uri, this, language, expression);
    }

}