org.ktunaxa.referral.server.mvc.UploadView.java Source code

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Here is the source code for org.ktunaxa.referral.server.mvc.UploadView.java
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/*
 * Ktunaxa Referral Management System.
 *
 * Copyright (C) see version control system
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.ktunaxa.referral.server.mvc;

import java.text.MessageFormat;
import java.util.Map;

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

import org.json.JSONObject;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.view.AbstractView;

import com.metaparadigm.jsonrpc.JSONSerializer;
import com.metaparadigm.jsonrpc.SerializerState;

/**
 * MVC view object that sends back javascript to call a preconfigured javascript function in response to a file upload.
 * This is necessary because the normal GWT RPC architecture can't be used.
 * 
 * @author Jan De Moerloose
 * 
 */
@Component(UploadView.NAME)
public class UploadView extends AbstractView {

    public static final String NAME = "UploadView";

    public static final String RESPONSE = "Upload.response";

    private JSONSerializer serializer = new JSONSerializer();

    /**
     * Constructs a new view instance.
     * 
     * @throws Exception
     *             thrown when JSON serializers could not be registered.
     */
    public UploadView() throws Exception {
        serializer.registerDefaultSerializers();
    }

    @Override
    protected void renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request,
            HttpServletResponse response) throws Exception {
        response.setContentType("text/html");
        response.getWriter().println("<html>");
        response.getWriter().println("<body>");
        response.getWriter().println("<script type=\"text/javascript\">");
        UploadResponse ur = (UploadResponse) model.get(RESPONSE);
        SerializerState state = new SerializerState();
        if (ur != null) {
            JSONObject result = (JSONObject) getSerializer().marshall(state, ur.getResultMap());
            if (ur.isSuccess()) {
                response.getWriter()
                        .println(MessageFormat.format(getSuccessScript(), result.getJSONObject("map").toString()));
            } else {
                response.getWriter()
                        .println(MessageFormat.format(getErrorScript(), result.getJSONObject("map").toString()));
            }
        } else {
            response.getWriter()
                    .println(MessageFormat.format(getErrorScript(), getSerializer().toJSON("server error")));
        }
        response.getWriter().println("</script>");
    }

    protected JSONSerializer getSerializer() {
        return serializer;
    }

    private String getSuccessScript() {
        return "if (parent.uploadComplete) parent.uploadComplete({0});";
    }

    private String getErrorScript() {
        return "if (parent.uploadFailed) parent.uploadFailed({0});";
    }

}