show.java

联合国农粮署牵头开发的geonetwork源代码最新版

//=============================================================================
//===	Copyright (C) 2001-2007 Food and Agriculture Organization of the
//===	United Nations (FAO-UN), United Nations World Food Programme (WFP)
//===	and United Nations Environment Programme (UNEP)
//===
//===	This program is free software; you can redistribute it and/or modify
//===	it under the terms of the GNU General Public License as published by
//===	the Free Software Foundation; either version 2 of the License, or (at
//===	your option) any later version.
//===
//===	This program 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
//===	General Public License for more details.
//===
//===	You should have received a copy of the GNU General Public License
//===	along with this program; if not, write to the Free Software
//===	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
//===
//===	Contact: Jeroen Ticheler - FAO - Viale delle Terme di Caracalla 2,
//===	Rome - Italy. email: [e-mail]
//==============================================================================

package org.fao.geonet.services.metadata;

import jeeves.interfaces.Service;
import jeeves.server.ServiceConfig;
import jeeves.server.UserSession;
import jeeves.server.context.ServiceContext;
import jeeves.utils.Util;
import org.fao.geonet.GeonetContext;
import org.fao.geonet.constants.Geonet;
import org.fao.geonet.constants.Params;
import org.fao.geonet.exceptions.MetadataNotFoundEx;
import org.fao.geonet.kernel.AccessManager;
import org.fao.geonet.kernel.DataManager;
import org.fao.geonet.lib.Lib;
import org.jdom.Element;

//=============================================================================

/** Retrieves a particular metadata. Access is restricted
  */

public class Show implements Service
{
	//--------------------------------------------------------------------------
	//---
	//--- Init
	//---
	//--------------------------------------------------------------------------

	public void init(String appPath, ServiceConfig params) throws Exception {}

	//--------------------------------------------------------------------------
	//---
	//--- Service
	//---
	//--------------------------------------------------------------------------

	public Element exec(Element params, ServiceContext context) throws Exception
	{
		UserSession session = context.getUserSession();

		//-----------------------------------------------------------------------
		//--- handle current tab

		Element elCurrTab = params.getChild(Params.CURRTAB);

		if (elCurrTab != null)
			session.setProperty(Geonet.Session.METADATA_SHOW, elCurrTab.getText());

		//-----------------------------------------------------------------------
		//--- check access

		GeonetContext gc = (GeonetContext) context.getHandlerContext(Geonet.CONTEXT_NAME);
		DataManager   dm = gc.getDataManager();

		String id = Util.getParam(params, Params.ID);

		Lib.resource.checkPrivilege(context, id, AccessManager.OPER_VIEW);

		//-----------------------------------------------------------------------
		//--- get metadata

		Element elMd = dm.getMetadata(context, id, false);

		if (elMd == null)
			throw new MetadataNotFoundEx(id);

		return elMd;
	}
}

//=============================================================================