//---------------------------------------------------------
// Application: Equipment of System
// Author     : eSingle
// File       : PurposeAction.java
//
// Copyright 2002 LandSoft Corp.
// Generated at Mon Nov 18 20:14:24 CST 2002
// Created by caoguangxin
// mailto:gxcao@mail.tsinghua.edu.cn
//---------------------------------------------------------


package com.landsoft.equipment.controller;

import javax.sql.*;
import java.util.*;

import org.apache.commons.logging.LogFactory;


import javax.servlet.http.*;
import javax.servlet.*;

import org.apache.struts.action.*;
import org.apache.struts.util.*;

import com.landsoft.equipment.model.*;
import com.landsoft.equipment.dao.*;
import com.landsoft.equipment.util.*;

public class PurposeAction extends Action {
  private org.apache.commons.logging.Log __log = LogFactory.getFactory().getInstance(this.getClass());
  private static final int PAGE_LENGTH = 20;

  public ActionForward execute(ActionMapping mapping, ActionForm form,
      HttpServletRequest request, HttpServletResponse response) {
    ActionForward myforward = null;
    String myaction = mapping.getParameter();

    if (isCancelled(request)) {
      if (__log.isInfoEnabled()) {
        __log.info(" [Purpose] " + mapping.getAttribute() + " - action was cancelled");
      }
      return mapping.findForward("cancel");
    }
    if (__log.isInfoEnabled()) {
      __log.info(" [Purpose] action: "+myaction);
    }
    if ("".equalsIgnoreCase(myaction)) {
      myforward = mapping.findForward("failure");
    } else if ("VIEW".equalsIgnoreCase(myaction)) {
      myforward = performView(mapping, form, request, response);
    } else if ("EDIT".equalsIgnoreCase(myaction)) {
      myforward = performEdit(mapping, form, request, response);
    } else if ("ADD".equalsIgnoreCase(myaction)) {
      myforward = performAdd(mapping, form, request, response);
    } else if ("SAVE".equalsIgnoreCase(myaction)) {
      myforward = performSave(mapping, form, request, response);
    } else if ("REMOVE".equalsIgnoreCase(myaction)) {
      myforward = performRemove(mapping, form, request, response);
    } else if ("TRASH".equalsIgnoreCase(myaction)) {
      myforward = performTrash(mapping, form, request, response);
    } else if ("LIST".equalsIgnoreCase(myaction)) {
      myforward = performList(mapping, form, request, response);
    } else {
      myforward = mapping.findForward("failure");
    }
    return myforward;
  }


  private ActionForward performList(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) {
    try {
      DataSource ds = (DataSource) servlet.getServletContext().getAttribute(Action.DATA_SOURCE_KEY);

      PurposeDAO purposeDAO = new PurposeDAO(ds);

      int offset;
      int length = PAGE_LENGTH;
      String pageOffset = request.getParameter("pager.offset");
      if (pageOffset == null || pageOffset.equals("")) {
        offset = 0;
      } else {
        offset = Integer.parseInt(pageOffset);
      }

      List purposes = purposeDAO.list(offset, length);

      String[] objKeys = {"Purpose", "list"};
      String objKey = CacheManager.createKey(objKeys);
      Integer size = (Integer)SizeCacheManager.getCache(objKey);
      if(size == null) {
        size = new Integer(purposeDAO.getSize("purpose", ""));
        SizeCacheManager.putCache(size, objKey, 1);
      }

      String url = request.getContextPath()+"/"+mapping.getPath()+".do";
      String pagerHeader = Pager.generate(offset, size.intValue(), length, url);
      request.setAttribute("pagerHeader", pagerHeader);

      request.setAttribute("PURPOSES", purposes);
    } catch (Exception e) {
      generalError(request, e);
      return mapping.findForward("failure");
    }

    return mapping.findForward("success");
  }

  private ActionForward performView(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) {
    PurposeForm form = (PurposeForm) actionForm;
    try {
      DataSource ds = (DataSource) servlet.getServletContext().getAttribute(Action.DATA_SOURCE_KEY);

      PurposeDAO purposeDAO = new PurposeDAO(ds);

      String purposename = request.getParameter("purposename");
      Purpose purpose = purposeDAO.retrieve(purposename);
      if (purpose == null) {
        ActionErrors aes = new ActionErrors();
        aes.add(aes.GLOBAL_ERROR, new ActionError("error.object.notfound", "Purpose"));
        saveErrors(request, aes);
        if (__log.isErrorEnabled()) {
          __log.error(" [Purpose] Object not found");
        }
      } else {
        org.apache.commons.beanutils.BeanUtils.populate(form, org.apache.commons.beanutils.BeanUtils.describe(purpose));
      }
    } catch (Exception e) {
      generalError(request, e);
      return mapping.findForward("failure");
    }
    return mapping.findForward("success");
  }

  private ActionForward performSave(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) {
    PurposeForm form = (PurposeForm) actionForm;

    try {
      DataSource ds = (DataSource) servlet.getServletContext().getAttribute(Action.DATA_SOURCE_KEY);

      PurposeDAO purposeDAO = new PurposeDAO(ds);

      Purpose purpose = new Purpose();
      org.apache.commons.beanutils.BeanUtils.populate(purpose, org.apache.commons.beanutils.BeanUtils.describe(form));
      int strutsAction = form.getStrutsAction();
      if (strutsAction == PurposeForm.ADD) {
        String purposename = purpose.getPurposename();
        if (purposeDAO.retrieve(purposename) == null) {
          purposeDAO.insert(purpose);
        } else {
          sqlDuplicateError(request, "Purpose");
          return mapping.findForward("failure");
        }
      } else if (strutsAction == PurposeForm.EDIT) {
        purposeDAO.update(purpose);
      }
    } catch (Exception e) {
      generalError(request, e);
      return mapping.findForward("failure");
    }
    return mapping.findForward("success");
  }

  private ActionForward performEdit(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) {
    PurposeForm form = (PurposeForm) actionForm;
    form.setStrutsAction(PurposeForm.EDIT);
    try {
      DataSource ds = (DataSource) servlet.getServletContext().getAttribute(Action.DATA_SOURCE_KEY);

      PurposeDAO purposeDAO = new PurposeDAO(ds);

      String purposename = request.getParameter("purposename");

      Purpose purpose = purposeDAO.retrieve(purposename);
      org.apache.commons.beanutils.BeanUtils.populate(form, org.apache.commons.beanutils.BeanUtils.describe(purpose));
    } catch (Exception e) {
      generalError(request, e);
      return mapping.findForward("failure");
    }
    return mapping.findForward("success");
  }

  private ActionForward performAdd(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) {
    PurposeForm form = (PurposeForm) actionForm;
    form.setStrutsAction(PurposeForm.ADD);
    return mapping.findForward("success");
  }
  private ActionForward performRemove(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) {
    return performView(mapping, actionForm, request, response);
  }

  private ActionForward performTrash(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) {
    PurposeForm form = (PurposeForm) actionForm;
    try {
      DataSource ds = (DataSource) servlet.getServletContext().getAttribute(Action.DATA_SOURCE_KEY);

      PurposeDAO purposeDAO = new PurposeDAO(ds);

      String purposename = request.getParameter("purposename");
      purposeDAO.delete(purposename);
    } catch (Exception e) {
      generalError(request, e);
      return mapping.findForward("failure");
    }
    return mapping.findForward("success");
  }


  private void sqlDuplicateError(HttpServletRequest request, String objName) {
    ActionErrors aes = new ActionErrors();
    aes.add(aes.GLOBAL_ERROR, new ActionError("errors.database.duplicate", objName));
    saveErrors(request, aes);
    if (__log.isErrorEnabled()) {
      __log.error(" [Purpose] Duplicate key Error - " + objName);
    }
  }

  private void generalError(HttpServletRequest request, Exception e) {
    ActionErrors aes = new ActionErrors();
    aes.add(aes.GLOBAL_ERROR, new ActionError("error.general", e.getMessage()));
    saveErrors(request, aes);
    e.printStackTrace();
    if (__log.isErrorEnabled()) {
      __log.error(" [Purpose] Error - " + e.getMessage());
    }
  }
}