edu.unc.lib.dl.cdr.services.AbstractFedoraEnhancement.java Source code

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Here is the source code for edu.unc.lib.dl.cdr.services.AbstractFedoraEnhancement.java

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/**
 * Copyright 2008 The University of North Carolina at Chapel Hill
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package edu.unc.lib.dl.cdr.services;

import java.util.List;

import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.Namespace;

import edu.unc.lib.dl.cdr.services.model.EnhancementMessage;
import edu.unc.lib.dl.fedora.FedoraException;
import edu.unc.lib.dl.fedora.PID;
import edu.unc.lib.dl.util.ContentModelHelper;
import edu.unc.lib.dl.xml.FOXMLJDOMUtil;
import edu.unc.lib.dl.xml.JDOMNamespaceUtil;

public abstract class AbstractFedoraEnhancement extends Enhancement<Element> {
    protected AbstractFedoraEnhancementService service;
    protected EnhancementMessage message;

    protected AbstractFedoraEnhancement(AbstractFedoraEnhancementService service, PID pid) {
        super(pid);
        this.service = service;
        this.message = null;
    }

    protected AbstractFedoraEnhancement(AbstractFedoraEnhancementService service, EnhancementMessage message) {
        super(message.getPid());
        this.message = message;
        this.service = service;
    }

    protected void setExclusiveTripleRelation(PID pid, String predicate, Namespace namespace, PID exclusivePID,
            Document foxml) throws FedoraException {
        List<String> rel = FOXMLJDOMUtil.getRelationValues(predicate, namespace, FOXMLJDOMUtil.getRelsExt(foxml));
        String predicateUri = namespace.getURI() + predicate;
        if (rel != null) {
            String valueString = exclusivePID.toString();
            if (rel.contains(valueString)) {
                rel.remove(valueString);
            } else {
                // add missing rel
                service.getManagementClient().addObjectRelationship(pid, predicateUri, exclusivePID);
            }
            // remove any other same predicate triples
            for (String oldValue : rel) {
                service.getManagementClient().purgeObjectRelationship(pid, predicateUri, new PID(oldValue));
            }
        } else {
            // add missing rel
            service.getManagementClient().addObjectRelationship(pid, predicateUri, exclusivePID);
        }
    }

    protected void setExclusiveTripleValue(PID pid, String predicate, Namespace namespace, String newExclusiveValue,
            String datatype, Document foxml) throws FedoraException {
        List<String> rel = FOXMLJDOMUtil.getRelationValues(predicate, namespace, FOXMLJDOMUtil.getRelsExt(foxml));
        String predicateUri = namespace.getURI() + predicate;
        if (rel != null) {
            if (rel.contains(newExclusiveValue)) {
                rel.remove(newExclusiveValue);
            } else {
                // add missing rel
                service.getManagementClient().addLiteralStatement(pid, predicateUri, newExclusiveValue, datatype);
            }
            // remove any other same predicate triples
            for (String oldValue : rel) {
                service.getManagementClient().purgeLiteralStatement(pid, predicateUri, oldValue, datatype);
            }
        } else {
            // add missing rel
            service.getManagementClient().addLiteralStatement(pid, predicateUri, newExclusiveValue, datatype);
        }
    }

    protected Document retrieveFoxml() throws FedoraException {
        if (message != null) {
            if (message.getFoxml() == null) {
                Document foxml = service.getManagementClient().getObjectXML(pid);
                message.setFoxml(foxml);
            }
            return message.getFoxml();
        }

        return service.getManagementClient().getObjectXML(pid);
    }

    protected List<String> getSourceData() throws FedoraException {
        return getSourceData(this.retrieveFoxml());
    }

    protected List<String> getSourceData(Document foxml) throws FedoraException {
        Element relsExt = FOXMLJDOMUtil.getRelsExt(foxml);
        return FOXMLJDOMUtil.getRelationValues(ContentModelHelper.CDRProperty.sourceData.getPredicate(),
                JDOMNamespaceUtil.CDR_NS, relsExt);
    }
}