Package org.apache.commons.jelly.tags.werkz

Source Code of org.apache.commons.jelly.tags.werkz.AttainGoalTag

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package org.apache.commons.jelly.tags.werkz;

import com.werken.werkz.Goal;
import com.werken.werkz.Session;
import com.werken.werkz.Project;
import com.werken.werkz.UnattainableGoalException;

import org.apache.commons.jelly.JellyException;
import org.apache.commons.jelly.XMLOutput;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
* Attains one or more goals.
*
* @author <a href="mailto:bob@eng.werken.com">bob mcwhirter</a>
* @version $Revision: 1.5 $
*/
public class AttainGoalTag extends WerkzTagSupport {

    /** The Log to which logging calls will be made. */
    private Log log = LogFactory.getLog(AttainGoalTag.class);
   
    /** The goal name. */
    private String name;
   
    public AttainGoalTag() {
    }

    // Tag interface
    //-------------------------------------------------------------------------
   
    /**
     * Evaluate the body to register all the various goals and pre/post conditions
     * then run all the current targets
     */
    public void doTag(final XMLOutput output) throws Exception {
       
        AttainTag attainTag = (AttainTag) findAncestorWithClass( AttainTag.class );
        Session session = null;

        if ( attainTag == null ) {
            session = new JellySession( output );
        } else {
            session = attainTag.getSession();
        }

        ProjectTag projectTag = (ProjectTag) findAncestorWithClass( ProjectTag.class );

        Project project = projectTag.getProject();

        invokeBody(output);

        try
        {
            project.attainGoal( getName(),
                                session );
        }
        catch (UnattainableGoalException e)
        {
            Throwable root = e.getRootCause();

            if ( root != null )
            {
                if ( root instanceof JellyException )
                {
                    throw (JellyException) root;
                }
                if ( root instanceof UnattainableGoalException )
                {
                    throw e;
                }
            }
            else
            {
                e.fillInStackTrace();
                throw e;
            }
        }
    }
   
    // Properties
    //-------------------------------------------------------------------------
   
    public void setName(String name) {
        this.name = name;
    }

    public String getName() {
        return this.name;
    }
}
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