org.mycore.datamodel.common.MCRXMLMetadataEventHandler Maven / Gradle / Ivy
/*
* This file is part of *** M y C o R e ***
* See http://www.mycore.de/ for details.
*
* MyCoRe 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.
*
* MyCoRe 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 MyCoRe. If not, see .
*/
package org.mycore.datamodel.common;
import java.io.IOException;
import java.util.Arrays;
import java.util.Date;
import org.mycore.common.MCRPersistenceException;
import org.mycore.common.content.MCRBaseContent;
import org.mycore.common.content.MCRContent;
import org.mycore.common.events.MCREvent;
import org.mycore.common.events.MCREventHandlerBase;
import org.mycore.datamodel.metadata.MCRBase;
import org.mycore.datamodel.metadata.MCRDerivate;
import org.mycore.datamodel.metadata.MCRObject;
import org.mycore.datamodel.metadata.MCRObjectID;
import org.mycore.datamodel.metadata.MCRObjectService;
/**
* This class manages all operations of the XMLTables for operations of an
* object or derivate.
*
* @author Jens Kupferschmidt
*/
public class MCRXMLMetadataEventHandler extends MCREventHandlerBase {
static MCRXMLMetadataManager metaDataManager = MCRXMLMetadataManager.instance();
/**
* This method add the data to SQL table of XML data via MCRXMLMetadataManager.
*
* @param evt
* the event that occured
* @param obj
* the MCRObject that caused the event
*/
@Override
protected final void handleObjectCreated(MCREvent evt, MCRObject obj) {
handleStoreEvent(evt, obj);
}
/**
* This method update the data to SQL table of XML data via
* MCRXMLMetadataManager.
*
* @param evt
* the event that occured
* @param obj
* the MCRObject that caused the event
*/
@Override
protected final void handleObjectUpdated(MCREvent evt, MCRObject obj) {
handleStoreEvent(evt, obj);
}
/**
* This method delete the XML data from SQL table data via
* MCRXMLMetadataManager.
*
* @param evt
* the event that occured
* @param obj
* the MCRObject that caused the event
*/
@Override
protected final void handleObjectDeleted(MCREvent evt, MCRObject obj) {
handleStoreEvent(evt, obj);
}
@Override
protected void handleObjectRepaired(MCREvent evt, MCRObject obj) {
handleStoreEvent(evt, obj);
}
/**
* This method add the data to SQL table of XML data via MCRXMLMetadataManager.
*
* @param evt
* the event that occured
* @param der
* the MCRDerivate that caused the event
*/
@Override
protected final void handleDerivateCreated(MCREvent evt, MCRDerivate der) {
handleStoreEvent(evt, der);
}
/**
* This method update the data to SQL table of XML data via
* MCRXMLMetadataManager.
*
* @param evt
* the event that occured
* @param der
* the MCRObject that caused the event
*/
@Override
protected final void handleDerivateUpdated(MCREvent evt, MCRDerivate der) {
handleStoreEvent(evt, der);
}
/**
* This method delete the XML data from SQL table data via
* MCRXMLMetadataManager.
*
* @param evt
* the event that occured
* @param der
* the MCRObject that caused the event
*/
@Override
protected final void handleDerivateDeleted(MCREvent evt, MCRDerivate der) {
handleStoreEvent(evt, der);
}
private void handleStoreEvent(MCREvent evt, MCRBase obj) {
String eventType = evt.getEventType();
MCRObjectID id = obj.getId();
try {
switch (eventType) {
case MCREvent.REPAIR_EVENT:
case MCREvent.UPDATE_EVENT:
case MCREvent.CREATE_EVENT:
MCRBaseContent content = new MCRBaseContent(obj);
Date modified = obj.getService().getDate(MCRObjectService.DATE_TYPE_MODIFYDATE);
switch (eventType) {
case MCREvent.REPAIR_EVENT:
MCRContent retrieveContent = metaDataManager.retrieveContent(id);
if (isUptodate(retrieveContent, content)) {
return;
}
case MCREvent.UPDATE_EVENT:
metaDataManager.update(id, content, modified);
break;
case MCREvent.CREATE_EVENT:
metaDataManager.create(id, content, modified);
break;
}
evt.put("content", content);
break;
case MCREvent.DELETE_EVENT:
metaDataManager.delete(id);
break;
default:
throw new IllegalArgumentException("Invalid event type " + eventType + " for object " + id);
}
} catch (IOException e) {
throw new MCRPersistenceException("Error while handling '" + eventType + "' event of '" + id + "'", e);
}
}
private boolean isUptodate(MCRContent retrieveContent, MCRBaseContent content) throws IOException {
return retrieveContent.lastModified() > content.lastModified()
|| Arrays.equals(retrieveContent.asByteArray(), content.asByteArray());
}
}