/* $This file is distributed under the terms of the license in /doc/license.txt$ */

package freemarker.ext.dump;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

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

import freemarker.core.Environment;
import freemarker.template.SimpleScalar;
import freemarker.template.TemplateDirectiveBody;
import freemarker.template.TemplateException;
import freemarker.template.TemplateModel;
import freemarker.template.TemplateModelException;

public class DumpDirective extends BaseDumpDirective {

    @SuppressWarnings("unused")
    private static final Log log = LogFactory.getLog(DumpDirective.class);
    
    @SuppressWarnings("rawtypes")
    @Override
    public void execute(Environment env, Map params, TemplateModel[] loopVars,
            TemplateDirectiveBody body) throws TemplateException, IOException {

        if (loopVars.length != 0) {
            throw new TemplateModelException(
                "The dump directive doesn't allow loop variables.");
        }
        if (body != null) {
            throw new TemplateModelException(
                "The dump directive doesn't allow nested content.");
        }
        
        Object o = params.get("var");
        if ( !(o instanceof SimpleScalar)) {
            throw new TemplateModelException(
               "Value of parameter 'var' must be a string.");     
        }
        
        String varName = ((SimpleScalar)o).getAsString();       
        Map<String, Object> map = new HashMap<String, Object>();      
        map.put("var", getTemplateVariableData(varName, env));

        dump("dumpvar.ftl", map, varName, env);   
    }
}