com.bluexml.xforms.servlets.ReadServlet.java Source code

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Here is the source code for com.bluexml.xforms.servlets.ReadServlet.java

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/*
Copyright (C) 2007-2011  BlueXML - www.bluexml.com
    
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU 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 General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
    
*/

package com.bluexml.xforms.servlets;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.apache.commons.lang.StringUtils;
import org.w3c.dom.Document;

import com.bluexml.xforms.controller.alfresco.AlfrescoController;
import com.bluexml.xforms.controller.alfresco.AlfrescoTransaction;
import com.bluexml.xforms.messages.MsgId;

/**
 * The Class ReadServlet. via GET method @ http://HostAndPort/xforms/read?...<br>
 */
public class ReadServlet extends AbstractServlet {

    /** The Constant serialVersionUID. */
    private static final long serialVersionUID = -8814073354764935112L;

    /** The Constant DATA_TYPE. */
    public static final String DATA_TYPE = "type";

    /*
     * (non-Javadoc)
     * 
     * @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest,
     * javax.servlet.http.HttpServletResponse)
     */
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException {
        read(req, resp);
    }

    /*
     * (non-Javadoc)
     * 
     * @see javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest,
     * javax.servlet.http.HttpServletResponse)
     */
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException {
        read(req, resp);
    }

    /**
     * Read.
     * 
     * @param req
     *            the req
     * @param resp
     *            the resp
     * 
     * @throws ServletException
     *             the servlet exception
     */
    protected void read(HttpServletRequest req, HttpServletResponse resp) throws ServletException {
        AlfrescoController controller = AlfrescoController.getInstance();
        String dataType = StringUtils.trimToNull(req.getParameter(DATA_TYPE));
        if (dataType != null) {
            dataType = dataType.replace('_', '.');
        }
        String dataId = StringUtils.trimToNull(req.getParameter(DATA_ID));
        dataId = controller.patchDataId(dataId);

        String skipIdStr = StringUtils.trimToNull(req.getParameter(ID_AS_SERVLET));
        boolean idAsServlet = !StringUtils.equals(skipIdStr, "false");

        try {
            String userName = req.getParameter(MsgId.PARAM_USER_NAME.getText());
            AlfrescoTransaction transaction = createTransaction(controller, userName);
            Document node = controller.getMappingAgent().getInstanceClass(transaction, dataType, dataId, false,
                    idAsServlet);
            Source xmlSource = new DOMSource(node);
            Result outputTarget = new StreamResult(resp.getOutputStream());
            documentTransformer.transform(xmlSource, outputTarget);
        } catch (Exception e) {
            throw new ServletException(e);
        }
    }

    /*
     * (non-Javadoc)
     * 
     * @see javax.servlet.GenericServlet#init()
     */
    @Override
    public void init() throws ServletException {
        super.init();
        System.out.println("BlueXML XForms - ReadServlet initialized.");
    }

}