/*
 * Created on Mar 15, 2005
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package org.apache.commons.chain.web.servlet;

import org.apache.commons.chain.Catalog;
import org.apache.commons.chain.Command;
import org.apache.commons.chain.Context;
import org.apache.commons.chain.generic.LookupCommand;

/**
 * @author germuska
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public abstract class AbstractMapper extends LookupCommand {

    protected Command getCommand(Context context) {
        // Map to the Command specified by the extra path info
        Catalog catalog = (Catalog) context.get(getCatalogKey());
        if (catalog == null) {
            ServletWebContext swContext = (ServletWebContext) context;
            catalog = (Catalog) swContext.getRequestScope().get(getCatalogKey());
        }
        return catalog.getCommand(getCommandName(context));
    }

    protected abstract String getCommandName(Context context);

    private String catalogKey = ChainProcessor.CATALOG_DEFAULT;

    /**
     * <p>Return the context key under which our {@link Catalog} has been
     * stored.</p>
     */
    public String getCatalogKey() {
    
        return (this.catalogKey);
    
    }

    /**
     * <p>Set the context key under which our {@link Catalog} has been
     * stored.</p>
     *
     * @param catalogKey The new catalog key
     */
    public void setCatalogKey(String catalogKey) {
    
        this.catalogKey = catalogKey;
    
    }
}