download.java

联合国农粮署牵头开发的geonetwork源代码最新版

//=============================================================================
//===	Copyright (C) 2001-2005 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//===
//===	Contact: Jeroen Ticheler - FAO - Viale delle Terme di Caracalla 2,
//===	Rome - Italy. email: [e-mail]
//==============================================================================

package org.fao.geonet.services.thesaurus;

import java.io.File;

import jeeves.interfaces.Service;
import jeeves.server.ServiceConfig;
import jeeves.server.context.ServiceContext;
import jeeves.utils.BinaryFile;
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.kernel.Thesaurus;
import org.fao.geonet.kernel.ThesaurusManager;
import org.jdom.Element;

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

/** 
 *  
 *  Download one thesaurus file
 */
public class Download implements Service
{
	//--------------------------------------------------------------------------
	//---
	//--- Init
	//---
	//--------------------------------------------------------------------------

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

	//--------------------------------------------------------------------------
	//---
	//--- API
	//---
	//--------------------------------------------------------------------------

	/**
	 *  @param params must contain
	 * 	@see Params.NAME key value
	 */
	public Element exec(Element params, ServiceContext context) throws Exception
	{
		GeonetContext gc = (GeonetContext) context.getHandlerContext(Geonet.CONTEXT_NAME);
		ThesaurusManager manager = gc.getThesaurusManager();
		
		// Param鑤res : thesaurus
		String name  = Util.getParam(params, Params.REF);
		
		Thesaurus directory = manager.getThesaurusByName(name);
		if (directory == null)
			throw new IllegalArgumentException("Thesaurus not found --> " + name);
		
		File directoryFile = directory.getFile();
		if (!directoryFile.exists())
			throw new IllegalArgumentException("Thesaurus file not found --> " + name);

		return BinaryFile.encode(200,directoryFile.getAbsolutePath());
	}

}