| gvSIG desktop 1

/* gvSIG. Geographic Information System of the Valencian Government

*

* Copyright (C) 2007-2008 Infrastructures and Transports Department

* of the Valencian Government (CIT)

* 

* 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 Street, Fifth Floor, Boston, 

* MA  02110-1301, USA.

* 

*/

/*

* AUTHORS (In addition to CIT):

* 2008 Geographic Information research group: http://www.geoinfo.uji.es

* Departamento de Lenguajes y Sistemas Inform?ticos (LSI)

* Universitat Jaume I   

* {{Task}}

*/

package org.gvsig.metadata.simple;

import java.io.IOException;

import java.io.InputStream;

import java.util.ArrayList;

import java.util.List;

import java.util.Map;

import org.gvsig.metadata.MetadataContainer;

import org.gvsig.metadata.MetadataManager;

import org.gvsig.metadata.exceptions.AddMetadataDefinitionException;

import org.gvsig.metadata.exceptions.DuplicateMetadataDefinitionException;

import org.gvsig.metadata.exceptions.InvalidMetadataNamespaceException;

import org.gvsig.metadata.exceptions.MetadataException;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.dynobject.DynClass;

import org.gvsig.tools.dynobject.DynObjectManager;

import org.gvsig.tools.dynobject.DynStruct;

import org.gvsig.tools.dynobject.impl.DynClassName;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.xmlpull.v1.XmlPullParserException;

public class SimpleMetadataManager implements MetadataManager {

        private final Logger LOG = LoggerFactory.getLogger(SimpleMetadataManager.class);

        public DynStruct addDefinition(String name, String description)

                        throws MetadataException {

                DynObjectManager dynman = ToolsLocator.getDynObjectManager();

                DynClass definition = dynman.createDynClass(METADATA_NAMESPACE, name, description);

                if( dynman.get(definition.getNamespace(),definition.getName())!=null ) {

                        throw new DuplicateMetadataDefinitionException(definition.getName());

                }

                dynman.add(definition);

                LOG.trace("Registered metadata definition {}.", definition.getFullName());

                return definition;

        }

        public DynStruct getDefinition(String name) {

                DynObjectManager dynman = ToolsLocator.getDynObjectManager();

                return dynman.get(METADATA_NAMESPACE,name);

        }

        public DynStruct addDefinition(String metadataDefinitionName,

                        InputStream stream, ClassLoader loader) throws MetadataException {

                DynObjectManager dynman = ToolsLocator.getDynObjectManager();

                Map x;

                try {

                        x = dynman.importDynClassDefinitions(stream, loader, METADATA_NAMESPACE);

                } catch (XmlPullParserException e) {

                        throw new AddMetadataDefinitionException(e, metadataDefinitionName);

                } catch (IOException e) {

                        throw new AddMetadataDefinitionException(e, metadataDefinitionName);

                }

                DynClass definition = (DynClass) x.get(metadataDefinitionName);

                if( definition== null ) {

                        throw new CantFindDefinitionInStreamException(metadataDefinitionName, getKeys(x));

                }

                return addDefinition(definition);

        }        

        private String getKeys(Map theMap) {

                List l = new ArrayList(theMap.keySet());

                return l.toString();

        }

        protected  DynStruct addDefinition(DynClass definition) throws MetadataException{

                        DynObjectManager dynman = ToolsLocator.getDynObjectManager();

                        if(! METADATA_NAMESPACE.equalsIgnoreCase(definition.getNamespace()) ) {

                                throw new InvalidMetadataNamespaceException(definition.getName(), definition.getNamespace());

                        }

                        if( dynman.get(definition.getNamespace(),definition.getName())!=null ) {

                                throw new DuplicateMetadataDefinitionException(definition.getName());

                        }

                        dynman.add(definition);

                        LOG.trace("Registered metadata definition {}.", definition.getFullName());

                        return definition;

                }

        public MetadataContainer createMetadataContainer(String name) {

                DynObjectManager dynman = ToolsLocator.getDynObjectManager();

                DynClass dynClass = dynman.get(METADATA_NAMESPACE, name);

                if (dynClass == null) {

                        throw new IllegalArgumentException("Can't locate class '"+ new DynClassName(METADATA_NAMESPACE,name).getFullName()+"'.");

                }

                return new SimpleMetadataContainer(dynClass);

        }

}