com.pureinfo.srm.action.CodeGetActionBase.java Source code

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Here is the source code for com.pureinfo.srm.action.CodeGetActionBase.java

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/**
 * PureInfo Command
 * @(#)CodeGetActionBase.java   1.0 2006-11-13
 * 
 * Copyright(c) 2004-2005, PureInfo Information Technology Corp. Ltd. 
 * All rights reserved, see the license file.
 * 
 * www.pureinfo.com.cn
 */

package com.pureinfo.srm.action;

import java.io.IOException;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForward;
import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.XMLWriter;

import com.pureinfo.ark.interaction.ActionBase;
import com.pureinfo.force.exception.PureException;
import com.pureinfo.srm.project.CodeInfo;
import com.pureinfo.srm.project.ICodeGnerator;

/**
 * <P>
 * Created on 2006-11-13 16:08:23 <BR>
 * Last modified on 2006-11-13
 * </P>
 * TODO describe CodeGetActionBase here ...
 * 
 * @author elmar.chen
 * @version 1.0, 2006-11-13
 * @since Command 1.0
 */
public abstract class CodeGetActionBase extends ActionBase {

    protected boolean isLoginNeeded() {
        return false;
    }

    /**
     * @see com.pureinfo.ark.interaction.ActionBase#executeAction()
     */
    public ActionForward executeAction() throws PureException {
        try {
            Document xDoc;
            try {
                ICodeGnerator cg = getGenerator();
                CodeInfo info = cg.getNextCode(getParams());
                xDoc = wrapInfo(info);
            } catch (Exception e) {
                e.printStackTrace();
                xDoc = createErrorXML();
            }
            try {
                response.setCharacterEncoding("utf-8");
                response.setContentType("text/xml");
                response.setHeader("Cache-Control", "no-cache"); //HTTP 1.1
                response.setHeader("Pragma", "no-cache"); //HTTP 1.0
                response.setDateHeader("Expires", -1);
                response.setDateHeader("max-age", 0);
                XMLWriter writer = new XMLWriter(response.getWriter());
                writer.write(xDoc);
                writer.close();
            } catch (IOException ex1) {
                response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
            }
            return null;
        } catch (RuntimeException e) {
            return mapping.findForward("code-get-error");
        }
    }

    /**
     * @return
     */
    private Document createErrorXML() {
        Document doc = DocumentHelper.createDocument();
        Element xRoot = doc.addElement("responseXML");
        addInfo(xRoot, "success", "false");
        addInfo(xRoot, "value", "ERROR");
        addInfo(xRoot, "msg", "");
        return doc;
    }

    /**
     * @param _info
     * @return
     */
    private Document wrapInfo(CodeInfo _info) {
        Document doc = DocumentHelper.createDocument();
        Element xRoot = doc.addElement("responseXML");
        addInfo(xRoot, "success", "true");
        addInfo(xRoot, "value", _info.value);
        if (_info.cross_boundary) {
            String sMsg = " " + _info.round + " ";
            addInfo(xRoot, "msg", sMsg);
        }
        return doc;
    }

    private void addInfo(Element _xRoot, String _sKey, String _sValue) {
        Element xValue = _xRoot.addElement(_sKey);
        xValue.setText(_sValue);
    }

    protected abstract ICodeGnerator getGenerator();

    protected abstract Object[] getParams();

}