jahiadata.java

java 写的一个新闻发布系统

//
//                                   ____.
//                       __/\ ______|    |__/\.     _______
//            __   .____|    |       \   |    +----+       \
//    _______|  /--|    |    |    -   \  _    |    :    -   \_________
//   \\______: :---|    :    :           |    :    |         \________>
//           |__\---\_____________:______:    :____|____:_____\
//                                      /_____|
//
//                 . . . i n   j a h i a   w e   t r u s t . . .
//

//
//  JahiaData
//  EV      30.10.2000
//  EV      23.12.2000  settings is not anymore in JahiaData, but in ParamBean
//
//  params()
//  fields()
//  containers()
//  gui()
//
//

package org.jahia.data;

import javax.servlet.http.*;			// HttpServletRequest, HttpServletResponse
import org.jahia.utils.*;           // JahiaConsole
import org.jahia.settings.*;        // SettingsBean, JahiaPrivateSettings
import org.jahia.params.*;          // ParamBean
import org.jahia.gui.*;             // GuiBean
import org.jahia.registries.*;      // ServicesRegistry
import org.jahia.data.fields.*;     // JahiaFieldSet
import org.jahia.data.containers.*; // JahiaContainerSet
import org.jahia.services.pages.JahiaPage;
import org.jahia.exceptions.JahiaException;
import org.jahia.services.usermanager.JahiaUser;


public class JahiaData {

    private ParamBean               jParams;
    private JahiaPrivateSettings    jSettings;

    private JahiaFieldSet           fieldSet;
    private JahiaContainerSet       containerSet;
    private GuiBean                 guiBean;

    /***
        * constructor
        * Build a JahiaData and optionaly can force to create or not the fields set or containers set.
        * This is used in particular situation where fields and conternaer sets are not required,
        * i.e. : when some engines are called from JahiaAdministration Servlet
        *
        * @author NK
        * @param ParamBean jParams
        * @param boolean doBuildData 
        */
    public JahiaData (ParamBean jParams, boolean doBuildData)
    throws JahiaException
    {
        this.jParams    = jParams;
		if ( doBuildData ){
        	buildData();        // throws JahiaException
        } else {
            guiBean         = new GuiBean( this.params() );
		}
    } // end constructor



    /***
        * constructor
        * EV    30.10.2000
        * EV    18.11.2000  added jSettings in parameters
        *
        */
    public JahiaData (ParamBean jParams)
    throws JahiaException
    {
        this.jParams    = jParams;

        buildData();        // throws JahiaException
    } // end constructor



    /***
        * buildData
        * EV    30.10.2000
        *
        */
    private void buildData()
    throws JahiaException
    {
        try {

            // Get the current page and user
            JahiaPage currentPage = params().getPage();
            JahiaUser currentUser = params().getUser();

            if (currentPage != null)
            {
                if (currentUser != null)
                {
                    // test if the user has read access to the current page.
                    if (currentPage.checkReadAccess (currentUser))
                    {
                        
                        fieldSet        = ServicesRegistry.getInstance().getJahiaFieldService(
                                            ).buildFieldStructureForPage( this );
                        containerSet    = ServicesRegistry.getInstance().getJahiaContainersService(
                                            ).buildContainerStructureForPage( this );
                        guiBean         = new GuiBean( this.params() );
                    }

                } else {
                    throw new JahiaException ("No user present !",
                            "No current user defined in the params in buildData() method.",
                            JahiaException.USER_ERROR, JahiaException.ERROR);
                }

            } else {
                String errorMsg = "Page does not exist : " + jParams.getPageID();
                JahiaConsole.println ( "OperationManager", errorMsg + " -> BAILING OUT" );
                throw new JahiaException ("404 Page not found",
                                          errorMsg, JahiaException.PAGE_ERROR, JahiaException.ERROR );
            }

        } catch (JahiaException je) {
            if (je.getSeverity() > JahiaException.WARNING) {
                JahiaConsole.println( "JahiaData", "Error in buildData -> BAILING OUT" );
                throw je;
            } else {
                JahiaConsole.println( "JahiaData", "Warning in buildData. Continuing..." );
            }
        }
    } // end buildData;


    /***
        * accessor methods
        * EV    30.10.2000
        *
        */
    public  ParamBean           params()        { return jParams;           }
    public  JahiaPage           page()          { return jParams.getPage(); }   // for upward compatibility
    public  JahiaFieldSet       fields()        { return fieldSet;          }
    public  JahiaContainerSet   containers()    { return containerSet;      }
    public  GuiBean             gui()           { return guiBean;           }
    // end accessor methods



} // end JahiaData