SizeController.java

/*
 * Copyright Aduna (http://www.aduna-software.com/) (c) 2007.
 *
 * Licensed under the Aduna BSD-style license.
 */
package org.openrdf.http.server.repository.size;

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

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.context.ApplicationContextException;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;

import info.aduna.webapp.views.SimpleResponseView;

import org.openrdf.http.protocol.Protocol;
import org.openrdf.http.server.ServerHTTPException;
import org.openrdf.http.server.ProtocolUtil;
import org.openrdf.http.server.repository.RepositoryInterceptor;
import org.openrdf.model.Resource;
import org.openrdf.model.ValueFactory;
import org.openrdf.repository.Repository;
import org.openrdf.repository.RepositoryConnection;
import org.openrdf.repository.RepositoryException;

/**
 * Handles requests for the size of (set of contexts in) a repository.
 * 
 * @author Herko ter Horst
 */
public class SizeController extends AbstractController {

	public SizeController()
		throws ApplicationContextException
	{
		setSupportedMethods(new String[] { METHOD_GET });
	}

	@Override
	protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response)
		throws Exception
	{
		ProtocolUtil.logRequestParameters(request);

		Repository repository = RepositoryInterceptor.getRepository(request);
		RepositoryConnection repositoryCon = RepositoryInterceptor.getRepositoryConnection(request);

		ValueFactory vf = repository.getValueFactory();
		Resource[] contexts = ProtocolUtil.parseContextParam(request, Protocol.CONTEXT_PARAM_NAME, vf);

		long size = -1;

		try {
			size = repositoryCon.size(contexts);
		}
		catch (RepositoryException e) {
			throw new ServerHTTPException("Repository error: " + e.getMessage(), e);
		}

		Map<String, Object> model = new HashMap<String, Object>();
		model.put(SimpleResponseView.CONTENT_KEY, String.valueOf(size));
		return new ModelAndView(SimpleResponseView.getInstance(), model);
	}
}