GoogleVisualizationView.java

/**
 * Copyright (c) 2000-2009, Jasig, Inc.
 * See license distributed with this file and available online at
 * https://www.ja-sig.org/svn/jasig-parent/tags/rel-10/license-header.txt
 */

package org.jasig.stats.reporting.view;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.view.AbstractView;

import com.google.visualization.datasource.DataSourceHelper;
import com.google.visualization.datasource.DataSourceRequest;
import com.google.visualization.datasource.base.DataSourceException;
import com.google.visualization.datasource.base.ReasonType;
import com.google.visualization.datasource.base.ResponseStatus;
import com.google.visualization.datasource.base.StatusType;
import com.google.visualization.datasource.datatable.DataTable;

/**
 * @author Eric Dalquist
 * @version $Revision$
 */
public class GoogleVisualizationView extends AbstractView {

    /* (non-Javadoc)
     * @see org.springframework.web.servlet.view.AbstractView#renderMergedOutputModel(java.util.Map, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
     */
    @Override
    protected void renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request, HttpServletResponse response) throws Exception {
        DataSourceRequest dsRequest = null;

        try {
            // Extract the request parameters.
            dsRequest = new DataSourceRequest(request);

            // Get the data table.
            final DataTable data = (DataTable)model.get("data");

            DataSourceHelper.setServletResponse(data, dsRequest, response);
        }
        catch (RuntimeException rte) {
            this.logger.error("A runtime exception has occured", rte);
            ResponseStatus status = new ResponseStatus(StatusType.ERROR, ReasonType.INTERNAL_ERROR, rte.getMessage());
            if (dsRequest == null) {
                dsRequest = DataSourceRequest.getDefaultDataSourceRequest(request);
            }
            DataSourceHelper.setServletErrorResponse(status, dsRequest, response);
        }
        catch (DataSourceException e) {
            DataSourceHelper.setServletErrorResponse(e, request, response);
        }
    }

}