Examples with CypherIndexer uk.ac.rothamsted.rdf.neo4j.load.support.CypherIndexer used on opensource projects

Example 1 with CypherIndexer

use of uk.ac.rothamsted.rdf.neo4j.load.support.CypherIndexer in project rdf2neo by Rothamsted.

the class SimpleCyLoader method load.

/**
 * <p>Uses the {@link #getCyNodeLoader()} and {@link #getCyRelationLoader()} to map data from an RDF/TDB
 * data source into Cypher entities and load them into a pre-configured Neo4j server.</p>
 *
 * <p>
 * opts [ 0 ] = true, means process Cypher nodes.<br/>
 * opts [ 1 ] = true, means process Cypher relations.<br/>
 * opts [ 2 ] = true, means process Cypher indices (if {@link #getCypherIndexer()} is defined).<br/>
 * </p>
 *
 * <p>I opts is null, all the three operations above are run in the same sequence.</p>
 *
 * <p>Nodes are always loaded before relations, indices are created the end of all other operations
 * this simplify relation DDL creation commands.</p>
 */
@Override
public void load(String tdbPath, Object... opts) {
    try {
        RdfDataManager rdfMgr = this.getRdfDataManager();
        rdfDataManager.open(tdbPath);
        Dataset ds = rdfMgr.getDataSet();
        String[] nameStr = { StringUtils.trimToEmpty(this.getName()) };
        if (!nameStr[0].isEmpty())
            nameStr[0] = "[" + nameStr[0] + "] ";
        Txn.executeRead(ds, () -> log.info("{}Sending {} RDF triples to Cypher", nameStr[0], ds.getDefaultModel().size()));
        // Nodes
        boolean doNodes = opts != null && opts.length > 0 ? (Boolean) opts[0] : true;
        if (doNodes)
            this.getCyNodeLoader().process(rdfMgr, opts);
        // Relations
        boolean doRels = opts != null && opts.length > 1 ? (Boolean) opts[1] : true;
        if (doRels)
            this.getCyRelationLoader().process(rdfMgr, opts);
        // User-defined indices
        boolean doIdx = opts != null && opts.length > 2 ? (Boolean) opts[2] : true;
        if (doIdx) {
            CypherIndexer indexer = this.getCypherIndexer();
            if (indexer != null)
                indexer.index();
        }
        log.info("{}RDF-Cypher conversion finished", nameStr[0]);
    } catch (Exception ex) {
        throw new RuntimeException("Error while running the RDF/Cypher loader:" + ex.getMessage(), ex);
    }
}