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/*  Sesame - Storage and Querying architecture for RDF and RDF Schema
 *  Copyright (C) 2001-2006 Aduna
 *
 *  Contact: 
 *  	Aduna
 *  	Prinses Julianaplein 14 b
 *  	3817 CS Amersfoort
 *  	The Netherlands
 *  	tel. +33 (0)33 465 99 87
 *  	fax. +33 (0)33 465 99 87
 *
 *  	http://aduna-software.com/
 *  	http://www.openrdf.org/
 *  
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package org.openrdf.sesame.sailimpl.sync;

import org.openrdf.model.Resource;
import org.openrdf.model.URI;
import org.openrdf.model.Value;

import org.openrdf.sesame.sail.LiteralIterator;
import org.openrdf.sesame.sail.RdfSchemaRepository;
import org.openrdf.sesame.sail.Sail;
import org.openrdf.sesame.sail.SailInternalException;
import org.openrdf.sesame.sail.StackedSail;
import org.openrdf.sesame.sail.StatementIterator;

/**
 * @author Arjohn Kampman
 * @version $Revision: 1.4.4.2 $
 */
public class SyncRdfSchemaRepository
	extends SyncRdfRepository
	implements RdfSchemaRepository, StackedSail
{
	private RdfSchemaRepository _rdfSchemaRepository;

	public SyncRdfSchemaRepository() {
		super();
	}

	public void setBaseSail(Sail sail) {
		if (sail instanceof RdfSchemaRepository) {
			super.setBaseSail(sail);
			_rdfSchemaRepository = (RdfSchemaRepository)sail;
		}
		else {
			throw new SailInternalException("base Sail should be an RdfSchemaRepository");
		}
	}

	public StatementIterator getExplicitStatements(
			Resource subj, URI pred, Value obj)
	{
		StatementIterator result = null;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.getExplicitStatements(subj, pred, obj);
		}
		finally {
			_releaseReadLock();
		}

		return result;
	}

	public boolean hasExplicitStatement(Resource subj, URI pred, Value obj)
	{
		boolean result = false;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.hasExplicitStatement(subj, pred, obj);
		}
		finally {
			_releaseReadLock();
		}
		
		return result;
	}

	public StatementIterator getClasses() {
		StatementIterator result = null;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.getClasses();
		}
		finally {
			_releaseReadLock();
		}

		return result;
	}

	public boolean isClass(Resource resource) {
		boolean result = false;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.isClass(resource);
		}
		finally {
			_releaseReadLock();
		}

		return result;
	}

	public StatementIterator getProperties() {
		StatementIterator result = null;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.getProperties();
		}
		finally {
			_releaseReadLock();
		}

		return result;
	}

	public boolean isProperty(Resource resource) {
		boolean result = false;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.isProperty(resource);
		}
		finally {
			_releaseReadLock();
		}

		return result;
	}

	public StatementIterator getSubClassOf(
			Resource subClass, Resource superClass)
	{
		StatementIterator result = null;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.getSubClassOf(
							subClass, superClass);
		}
		finally {
			_releaseReadLock();
		}

		return result;
	}

	public StatementIterator getDirectSubClassOf(
			Resource subClass, Resource superClass)
	{
		StatementIterator result = null;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.getDirectSubClassOf(
							subClass, superClass);
		}
		finally {
			_releaseReadLock();
		}

		return result;
	}

	public boolean isSubClassOf(
			Resource subClass, Resource superClass)
	{
		boolean result = false;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.isSubClassOf(subClass, superClass);
		}
		finally {
			_releaseReadLock();
		}

		return result;
	}

	public boolean isDirectSubClassOf(
			Resource subClass, Resource superClass)
	{
		boolean result = false;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.isDirectSubClassOf(
							subClass, superClass);
		}
		finally {
			_releaseReadLock();
		}

		return result;
	}

	public StatementIterator getSubPropertyOf(
			Resource subProperty, Resource superProperty)
	{
		StatementIterator result = null;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.getSubPropertyOf(
							subProperty, superProperty);
		}
		finally {
			_releaseReadLock();
		}

		return result;
	}

	public StatementIterator getDirectSubPropertyOf(
			Resource subProperty, Resource superProperty)
	{
		StatementIterator result = null;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.getDirectSubPropertyOf(
							subProperty, superProperty);
		}
		finally {
			_releaseReadLock();
		}

		return result;
	}

	public boolean isSubPropertyOf(
			Resource subProperty, Resource superProperty)
	{
		boolean result = false;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.isSubPropertyOf(
							subProperty, superProperty);
		}
		finally {
			_releaseReadLock();
		}
		
		return result;
	}

	public boolean isDirectSubPropertyOf(
			Resource subProperty, Resource superProperty)
	{
		boolean result = false;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.isDirectSubPropertyOf(
							subProperty, superProperty);
		}
		finally {
			_releaseReadLock();
		}
		
		return result;
	}

	public StatementIterator getDomain(Resource prop, Resource domain) {
		StatementIterator result = null;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.getDomain(prop, domain);
		}
		finally {
			_releaseReadLock();
		}

		return result;
	}

	public StatementIterator getRange(Resource prop, Resource range) {
		StatementIterator result = null;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.getRange(prop, range);
		}
		finally {
			_releaseReadLock();
		}

		return result;
	}

	public StatementIterator getType(
			Resource anInstance, Resource aClass)
	{
		StatementIterator result = null;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.getType(anInstance, aClass);
		}
		finally {
			_releaseReadLock();
		}

		return result;
	}

	public StatementIterator getDirectType(
			Resource anInstance, Resource aClass)
	{
		StatementIterator result = null;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.getDirectType(anInstance, aClass);
		}
		finally {
			_releaseReadLock();
		}

		return result;
	}

	public boolean isType(
			Resource anInstance, Resource aClass)
	{
		boolean result = false;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.isType(anInstance, aClass);
		}
		finally {
			_releaseReadLock();
		}

		return result;
	}

	public boolean isDirectType(
			Resource anInstance, Resource aClass)
	{
		boolean result = false;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.isDirectType(anInstance, aClass);
		}
		finally {
			_releaseReadLock();
		}

		return result;
	}

	public LiteralIterator getLiterals(
			String label, String language, URI datatype)
	{
		LiteralIterator result = null;

		_getReadLock();
		try {
			result = _rdfSchemaRepository.getLiterals(label, language, datatype);
		}
		finally {
			_releaseReadLock();
		}

		return result;
	}
}