maven-scm-api/src/main/java/org/apache/maven/scm/util/AbstractConsumer.java

package org.apache.maven.scm.util;

/*
 * Copyright 2001-2006 The Apache Software Foundation.
 *
 * Licensed 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.
 */

import org.apache.maven.scm.log.ScmLogger;
import org.codehaus.plexus.util.StringUtils;
import org.codehaus.plexus.util.cli.StreamConsumer;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

/**
 * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse</a>
 * @version $Id$
 */
public abstract class AbstractConsumer
    implements StreamConsumer
{
    private ScmLogger logger;

    public AbstractConsumer( ScmLogger logger )
    {
        setLogger( logger );
    }

    public ScmLogger getLogger()
    {
        return logger;
    }

    public void setLogger( ScmLogger logger )
    {
        this.logger = logger;
    }

    /**
     * Converts the date timestamp from the output into a date object.
     *
     * @return A date representing the timestamp of the log entry.
     */
    protected Date parseDate( String date, String userPattern, String defaultPattern )
    {
        DateFormat format;

        if ( !StringUtils.isEmpty( userPattern ) )
        {
            format = new SimpleDateFormat( userPattern );
        }
        else
        {
            if ( !StringUtils.isEmpty( defaultPattern ) )
            {
                format = new SimpleDateFormat( defaultPattern );
            }
            else
            {
                // Use the English short date pattern if no pattern is specified
                format = DateFormat.getDateInstance( DateFormat.SHORT, Locale.ENGLISH );
            }
        }

        try
        {
            return format.parse( date );
        }
        catch ( ParseException e )
        {
            if ( getLogger() != null )
            {
                getLogger().error( "ParseException Caught", e );
            }

            return null;
        }
    }
}