trunk/components/camel-dns/src/main/java/org/apache/camel/component/dns/DnsComponent.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.dns;

import java.util.Map;

import org.apache.camel.Endpoint;
import org.apache.camel.impl.DefaultComponent;

/**
 * The DNS components creates endpoints of the form: <br/>
 * dns:///... <br/>
 * At this point, the DNS component works with these operations:<br/>
 * <p>
 * dns:///ip <br/>
 * <p/>
 * This will return the IP address associated with the domain passed in
 * the header dns.domain.
 * </p>
 * <p>
 * dns:///lookup This endpoint accepts three parameters.
 * <ul>
 * <li>dns.name: the lookup name. Usually the domain. Mandatory.</li>
 * <li>dns.type: the type of the lookup. Should match the values of
 * {@see org.xbill.dns.Type}. Optional.</li>
 * <li>dns.class: the DNS class of the lookup. Should match the values
 * of {@see org.xbill.dns.DClass}. Optional.</li>
 * </ul>
 * </p>
 * <p/>
 * <p>
 * dns:///dig This endpoint takes a few parameters, most of them
 * optional :
 * <ul>
 * <li>dns.server: the server in particular for the query. If none is
 * given, the default one specified by the OS will be used.</li>
 * <li>dns.query: the query itself. Mandatory.</li>
 * <li>dns.type: the type of the lookup. Should match the values of
 * {@see org.xbill.dns.Type}. Optional.</li>
 * <li>dns.class: the DNS class of the lookup. Should match the values
 * of {@see org.xbill.dns.DClass}. Optional.</li>
 * </ul>
 * <p/>
 * </p>
 * <p/>
 * <p>
 * dns:///wikipedia This endpoint takes one paramter :
 * <ul>
 * <li>term: the search term on wikipedia</li>
 * </ul>
 * <p/>
 * </p>
 */
public class DnsComponent extends DefaultComponent {

    protected Endpoint createEndpoint(String uri, String remaining, Map<String, Object> parameters) throws Exception {
        if (DnsConstants.OPERATION_IP.equals(remaining)) {
            return new DnsIpEndpoint(this);
        } else if (DnsConstants.OPERATION_LOOKUP.equals(remaining)) {
            return new DnsLookupEndpoint(this);
        } else if (DnsConstants.OPERATION_DIG.equals(remaining)) {
            return new DnsDigEndpoint(this);
        } else if (DnsConstants.OPERATION_WIKIPEDIA.equals(remaining)) {
            return new WikipediaEndpoint(this);
        } else {
            throw new IllegalArgumentException(uri + " is unsupported by the DNS component");
        }
    }

}