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package org.apache.commons.jelly.tags.werkz;
import com.werken.werkz.Goal;
import com.werken.werkz.Action;
import com.werken.werkz.DefaultAction;
import com.werken.werkz.CyclicGoalChainException;
import java.util.Iterator;
import java.util.List;
import java.util.StringTokenizer;
import org.apache.commons.jelly.JellyException;
import org.apache.commons.jelly.XMLOutput;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Implements a <target> tag which is similar to the Ant equivalent tag
* but is based on the Werkz goal engine.
*
* @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
* @version $Revision: 1.6 $
*/
public class GoalTag extends WerkzTagSupport {
/** The Log to which logging calls will be made. */
private Log log = LogFactory.getLog(GoalTag.class);
/** the name of the target */
private String name;
private String prereqs;
private String description;
public GoalTag() {
}
// 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 {
log.debug("doTag(..):" + name);
Goal goal = getProject().getGoal( getName(),
true );
goal.setDescription( this.description );
addPrereqs( goal );
Action action = new DefaultAction() {
public void performAction() throws Exception {
log.debug("Running action of target: " + getName() );
invokeBody(output);
}
};
goal.setAction( action );
}
// Properties
//-------------------------------------------------------------------------
/**
* @return the name of the target
*/
public String getName() {
return name;
}
/**
* Sets the name of the target
*/
public void setName(String name) {
log.debug("setName(" + name + ")" );
this.name = name;
}
public void setPrereqs(String prereqs) {
this.prereqs = prereqs;
}
public String getPrereqs() {
return this.prereqs;
}
public void setDescription(String description) {
this.description = description;
}
protected void addPrereqs(Goal goal) throws CyclicGoalChainException
{
String prereqs = getPrereqs();
if ( prereqs == null )
{
return;
}
StringTokenizer tokens = new StringTokenizer( getPrereqs(),
"," );
String eachToken = null;
Goal eachPrereq = null;
while ( tokens.hasMoreTokens() )
{
eachToken = tokens.nextToken().trim();
eachPrereq = getProject().getGoal( eachToken, true );
goal.addPrerequisite( eachPrereq );
}
}
}