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/*
 * Copyright 2010 Trustees of the University of Pennsylvania Licensed under the
 * Educational Community 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.osedu.org/licenses/ECL-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 metridoc.camel.component.liquibase;

import metridoc.utils.Assert;
import org.apache.camel.Endpoint;
import org.apache.camel.impl.DefaultComponent;
import org.apache.camel.impl.ProcessorEndpoint;

import javax.sql.DataSource;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 *
 *
 *
 * @author Tommy Barker
 */
public class LiquibaseComponent extends DefaultComponent{

    private static Pattern pattern = Pattern.compile("liquibase://([^\\?]+)");

    @Override
    protected Endpoint createEndpoint(String uri, String remaining, Map parameters) throws Exception {
        String contexts = (String) parameters.remove("contexts"); //ok if contexts is null
        DataSource dataSource = getDataSource(parameters);
        LiquibaseProcessor processor = new LiquibaseProcessor(getLiquibaseFilePath(uri), dataSource, contexts);
        return new ProcessorEndpoint(uri, getCamelContext(), processor);
    }

    static String getLiquibaseFilePath(String uri) {
        Matcher m = pattern.matcher(uri);
        m.lookingAt();
        return m.group(1) + ".xml";
    }

    DataSource getDataSource(Map parameters) {
        String dataSourceReference = (String) parameters.remove("dataSource");
        Assert.notEmpty(dataSourceReference, "the dataSource parameter must be provided when using the "
                + "liquibase component");
        return getCamelContext().getRegistry().lookup(dataSourceReference, DataSource.class);
    }

}