AbstractDialect.java

/*
 * Copyright (c) 2010 Mysema Ltd.
 * All rights reserved.
 *
 */
package com.mysema.rdfbean.model;

import java.util.HashMap;
import java.util.Map;

/**
 * @author tiwe
 */
public abstract class AbstractDialect<N, R extends N, B extends R, U extends R, L extends N, S> implements Dialect<N, R, B, U, L, S> {

    private final Map<String, UID> datatypeUIDCache = new HashMap<String, UID>();

    public AbstractDialect() {
        for (UID uid : Nodes.get(XSD.NS)) {
            datatypeUIDCache.put(uid.getId(), uid);
        }
    }

    protected UID getDatatypeUID(String datatype) {
        UID uid = datatypeUIDCache.get(datatype);
        if (uid == null) {
            uid = new UID(datatype);
            datatypeUIDCache.put(datatype, uid);
        }
        return uid;
    }

    @Override
    public N getNode(NODE node) {
        if (node.isLiteral()) {
            return getLiteral(node.asLiteral());
        } else if (node.isBNode()) {
            return getBNode(node.asBNode());
        } else {
            return getURI(node.asURI());
        }
    }

    @Override
    public R getResource(ID id) {
        if (id.isURI()) {
            return getURI(id.asURI());
        } else {
            return getBNode(id.asBNode());
        }
    }

}