org.mycore.datamodel.metadata.share.MCRDefaultMetadataShareAgent 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.metadata.share;
import java.util.stream.StreamSupport;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.jdom2.Element;
import org.mycore.access.MCRAccessException;
import org.mycore.common.MCRException;
import org.mycore.common.MCRPersistenceException;
import org.mycore.common.xml.MCRXMLHelper;
import org.mycore.datamodel.metadata.MCRMetaElement;
import org.mycore.datamodel.metadata.MCRMetaLinkID;
import org.mycore.datamodel.metadata.MCRMetadataManager;
import org.mycore.datamodel.metadata.MCRObject;
import org.mycore.datamodel.metadata.MCRObjectID;
import org.mycore.datamodel.metadata.MCRObjectMetadata;
/**
* @author Thomas Scheffler (yagee)
*/
class MCRDefaultMetadataShareAgent implements MCRMetadataShareAgent {
private static final Logger LOGGER = LogManager.getLogger();
/* (non-Javadoc)
* @see org.mycore.datamodel.metadata.share.MCRMetadataShareAgent#inheritableMetadataChanged(org.mycore.datamodel.metadata.MCRObject, org.mycore.datamodel.metadata.MCRObject)
*/
@Override
public boolean shareableMetadataChanged(MCRObject oldVersion, MCRObject newVersion) {
final MCRObjectMetadata md = newVersion.getMetadata();
final MCRObjectMetadata mdold = oldVersion.getMetadata();
final Element newXML = md.createXML();
Element oldXML = null;
try {
oldXML = mdold.createXML();
} catch (MCRException exc) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("The old metadata of the object {} was invalid.", oldVersion.getId(), exc);
}
}
//simple save without changes, this is also a short-path for mycore-mods
//TODO: handle inheritance of mycore-mods in that component
if (oldXML != null && MCRXMLHelper.deepEqual(newXML, oldXML)) {
return false;
}
int numheritablemd = 0;
int numheritablemdold;
for (int i = 0; i < md.size(); i++) {
final MCRMetaElement melm = md.getMetadataElement(i);
if (melm.isHeritable()) {
numheritablemd++;
try {
final MCRMetaElement melmold = mdold.getMetadataElement(melm.getTag());
final Element jelm = melm.createXML(true);
Element jelmold = null;
try {
jelmold = melmold.createXML(true);
} catch (MCRException exc) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("One of the old metadata elements is invalid.", exc);
}
}
if (jelmold == null || !MCRXMLHelper.deepEqual(jelmold, jelm)) {
return true;
}
} catch (final RuntimeException e) {
return true;
}
}
}
numheritablemdold = (int) StreamSupport.stream(mdold.spliterator(), false)
.filter(MCRMetaElement::isHeritable)
.count();
return numheritablemd != numheritablemdold;
}
/* (non-Javadoc)
* @see org.mycore.datamodel.metadata.share.MCRMetadataShareAgent#inheritMetadata(org.mycore.datamodel.metadata.MCRObject)
*/
@Override
public void distributeMetadata(MCRObject parent) throws MCRPersistenceException, MCRAccessException {
for (MCRMetaLinkID childId : parent.getStructure().getChildren()) {
LOGGER.debug("Update metadata from Child {}", childId);
final MCRObject child = MCRMetadataManager.retrieveMCRObject(childId.getXLinkHrefID());
MCRMetadataManager.update(child);
}
}
/* (non-Javadoc)
* @see org.mycore.datamodel.metadata.share.MCRMetadataShareAgent#inheritMetadata(org.mycore.datamodel.metadata.MCRObject, org.mycore.datamodel.metadata.MCRObject)
*/
@Override
public void receiveMetadata(MCRObject child) {
MCRObjectID parentID = child.getStructure().getParentID();
if (parentID == null) {
return;
}
LOGGER.debug("Parent ID = {}", parentID);
MCRObject parent = MCRMetadataManager.retrieveMCRObject(parentID);
// remove already embedded inherited tags
child.getMetadata().removeInheritedMetadata();
// insert heritable tags
child.getMetadata().appendMetadata(parent.getMetadata().getHeritableMetadata());
}
}