LocalMetadataWrapper.java

/*
 * Copyright (c) 2007-2024 MetaSolutions AB
 *
 * 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 org.entrystore.impl;

import org.eclipse.rdf4j.model.Model;
import org.eclipse.rdf4j.model.impl.LinkedHashModel;
import org.entrystore.Entry;
import org.entrystore.Metadata;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.net.URI;


public class LocalMetadataWrapper implements Metadata {

    Logger log = LoggerFactory.getLogger(LocalMetadataWrapper.class);

    Entry entry;

    URI refEntryURI;

    public LocalMetadataWrapper(Entry entry) {
        this.entry = entry;
        Entry e = entry.getRepositoryManager().getContextManager().getEntry(entry.getExternalMetadataURI());
        if (e != null) {
            refEntryURI = e.getEntryURI();
        } else {
            log.warn("Could not find Entry with external MD URI: " + entry.getExternalMetadataURI());
        }
    }

    public Model getGraph() {
        Entry e = null;
        if (refEntryURI != null) {
            e = ((ContextImpl) entry.getContext()).getSoftCache().getByEntryURI(refEntryURI);
        }
        if (e == null) {
            e = entry.getRepositoryManager().getContextManager().getEntry(entry.getExternalMetadataURI());
        }
        if (e != null && e.getLocalMetadata() != null) {
            return e.getLocalMetadata().getGraph();
        } else {
            log.warn("Entry is null, returning an empty graph");
            return new LinkedHashModel();
        }
    }

    public URI getResourceURI() {
        return entry.getResourceURI();
    }

    public URI getURI() {
        return entry.getExternalMetadataURI();
    }

    public boolean isCached() {
        return true;
    }

    public void setGraph(Model graph) {
        throw new UnsupportedOperationException();
    }

}