package org.g4studio.core.mvc.xstruts.chain.commands;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.g4studio.core.mvc.xstruts.action.Action;
import org.g4studio.core.mvc.xstruts.chain.contexts.ActionContext;
import org.g4studio.core.mvc.xstruts.config.ActionConfig;
/**
* <p>
* Create (if necessary) and cache an <code>Action</code> for this request.
* </p>
*
* @version $Rev: 421119 $ $Date: 2005-11-12 13:01:44 -0500 (Sat, 12 Nov 2005) $
*/
public abstract class AbstractCreateAction extends ActionCommandBase {
// ------------------------------------------------------ Instance Variables
/**
* Provide a Commons logging instance for this class.
*/
private static final Log LOG = LogFactory.getLog(AbstractCreateAction.class);
// ---------------------------------------------------------- Public Methods
/**
* <p>
* Create (if necessary) and cache an <code>Action</code> for this request.
* </p>
*
* @param actionCtx
* The <code>Context</code> for the current request
* @return <code>false</code> so that processing continues
* @throws Exception
* if there are any problems instantiating the Action class.
*/
public boolean execute(ActionContext actionCtx) throws Exception {
// Skip processing if the current request is not valid
Boolean valid = actionCtx.getFormValid();
if ((valid == null) || !valid.booleanValue()) {
LOG.trace("Invalid form; not going to execute.");
return (false);
}
// Check to see if an action has already been created
if (actionCtx.getAction() != null) {
LOG.trace("already have an action [" + actionCtx.getAction() + "]");
return (false);
}
// Look up the class name for the desired Action
ActionConfig actionConfig = actionCtx.getActionConfig();
String type = actionConfig.getType();
if (type == null) {
LOG.trace("no type for " + actionConfig.getPath());
return (false);
}
// Create (if necessary) and cache an Action instance
Action action = getAction(actionCtx, type, actionConfig);
if (LOG.isTraceEnabled()) {
LOG.trace("setting action to " + action);
}
actionCtx.setAction(action);
return (false);
}
// ------------------------------------------------------- Protected Methods
protected abstract Action getAction(ActionContext context, String type, ActionConfig actionConfig) throws Exception;
}