jahiafielddefinitionsregistry.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 . . .
//

//
//  EV      25.11.2000
//

package org.jahia.registries;

import java.util.*;                     // Vector

import org.jahia.utils.*;           // JahiaConsole
import org.jahia.data.fields.*;     // JahiaField
import org.jahia.services.*;        // ServicesRegistry
import org.jahia.exceptions.JahiaException;

public class JahiaFieldDefinitionsRegistry {

    private static  JahiaFieldDefinitionsRegistry   theObject   = null;

    private static final String KEY_SEPARATOR = "###";

    private         Map          fieldDefTable;
    private         Map          fieldDefSiteAndNameTable;

    /***
     * constructor
     * EV    25.11.2000
     *
     */
    private JahiaFieldDefinitionsRegistry()
    {
        JahiaConsole.println( "JahiaFieldDefinitionsRegistry", "***** Starting FieldDefinitions Registry *****" );
    } // end constructor



    /***
     * getInstance
     * EV    25.11.2000
     *
     */
    public static synchronized JahiaFieldDefinitionsRegistry getInstance()
    {
        if (theObject == null) {
            theObject = new JahiaFieldDefinitionsRegistry();
        }
        return theObject;
    } // end getInstance



    /***
     * init
     * EV    25.11.2000
     *
     */
    public void init()
    throws JahiaException
    {
        loadAllDefinitions();
    } // end init



    /***
     * loadAllDefinitions
     * EV    29.12.2000
     *
     */
    public synchronized void loadAllDefinitions()
            throws JahiaException
    {
        fieldDefTable = new HashMap();
        fieldDefSiteAndNameTable = new HashMap();
        Vector ids = ServicesRegistry.getInstance().getJahiaFieldService().getAllFieldDefinitionIDs();
        Enumeration fieldDefIDEnum = ids.elements();
        while (fieldDefIDEnum.hasMoreElements()) {
            Integer currentID = ((Integer)fieldDefIDEnum.nextElement());
            JahiaFieldDefinition curDefinition = ServicesRegistry.getInstance().getJahiaFieldService().loadFieldDefinition(currentID.intValue());
            fieldDefTable.put(currentID, curDefinition);
            fieldDefSiteAndNameTable.put(curDefinition.getName() + KEY_SEPARATOR + Integer.toString(curDefinition.getJahiaID()), curDefinition);
        }
    } // end loadAllDefinitions



    /***
     * getDefinition
     * EV    29.12.2000
     *
     */
    public JahiaFieldDefinition getDefinition( int defID )
    throws JahiaException
    {
        JahiaFieldDefinition result = (JahiaFieldDefinition) fieldDefTable.get(new Integer(defID));
        if (result != null) {
            return result;
        }

        String errorMsg = "The FielddescRegistry could not find the definition ID " + defID;
        JahiaConsole.println ("JahiaFieldDefinitionsRegistry", errorMsg + " -> BAILING OUT");
        throw new JahiaException ("Database synchronisation error",
                                  errorMsg, JahiaException.REGISTRY_ERROR, JahiaException.CRITICAL);
    } // end getDefinition



    //--------------------------------------------------------------------------
    // 11.07.2001 update to multi site by adding siteID
    /***
     * getDefinition
     * EV    25.11.2000
     *
     */
    public JahiaFieldDefinition getDefinition( int siteID, String fieldName )
    {
        JahiaFieldDefinition result = (JahiaFieldDefinition) fieldDefSiteAndNameTable.get(fieldName + KEY_SEPARATOR + Integer.toString(siteID));

        return result;
    } // end getDefinition


    /***
     * setDefinition
     * EV    25.11.2000
     *
     */
    public synchronized void setDefinition( JahiaFieldDefinition theFieldDef )
    throws JahiaException
    {

        JahiaFieldDefinition aFieldDef = getDefinition( theFieldDef.getJahiaID(), theFieldDef.getName() );

        if (aFieldDef != null) {
            // field definition already exists, just have to update
            // check if the field def has changed

            // We ensure to perform an update
            theFieldDef.setID(aFieldDef.getID());

            ServicesRegistry.getInstance().getJahiaFieldService().saveFieldDefinition( theFieldDef );
            fieldDefTable.put(new Integer(theFieldDef.getID()), theFieldDef);
            fieldDefSiteAndNameTable.put(theFieldDef.getName() + KEY_SEPARATOR + Integer.toString(theFieldDef.getJahiaID()), theFieldDef);
        } else {
            // field definition doesn't exist, need to add to registry

            //We ensure to create a new one
            theFieldDef.setID(0);

            ServicesRegistry.getInstance().getJahiaFieldService().saveFieldDefinition( theFieldDef );
            fieldDefTable.put(new Integer(theFieldDef.getID()), theFieldDef);
            fieldDefSiteAndNameTable.put(theFieldDef.getName() + KEY_SEPARATOR + Integer.toString(theFieldDef.getJahiaID()), theFieldDef);
        }
    } // end setDefinition


    /***
     * remove a Field Definition
     * NK    02.08.2001
     *
     */
    public synchronized void removeFieldDefinition( int fieldDefID )
    throws JahiaException
    {
        JahiaFieldDefinition fieldDef = getDefinition(fieldDefID);
        fieldDefTable.remove(new Integer(fieldDefID));
        fieldDefSiteAndNameTable.remove(fieldDef.getName() + KEY_SEPARATOR + Integer.toString(fieldDef.getJahiaID()));

    } // end setDefinition

}