Application: gvSIG desktop

/* 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 IVER T.I   {{Task}}

*/

/**

 *

 */

package org.gvsig.fmap.data.feature.file;

import java.io.File;

import org.gvsig.fmap.data.exceptions.DataException;

import org.gvsig.fmap.data.exceptions.InitializeException;

import org.gvsig.fmap.data.exceptions.ResourceChangedException;

import org.gvsig.fmap.data.impl.AbstractResource;

/**

 * @author jmvivo

 *

 */

public abstract class FileResource extends AbstractResource {

        protected File file;

        private long fileLastModified=0;

        private boolean editing=false;

        public FileResource(FileStoreParameters params) {

                super(params);

                this.file = params.getFile();

        }

        public void setFile(File aFile) throws InitializeException{

                if (this.getRefencesCount() > 0){

                        throw new InitializeException("Resource in use",this.getDescription());

                }

                this.file=aFile;

        }

        /* (non-Javadoc)

         * @see org.gvsig.fmap.data.Resource#description()

         */

        public String getDescription() {

                if (this.getFile()!= null){

                        return this.getName() +" File resource: " + this.getFile().getAbsolutePath();

                } else{

                        return this.getName() +" File resource: {No file}";

                }

        }

        public File getFile(){

                return this.file;

        }

        protected String generateKey(){

                return this.getName()+":"+this.getFile().getAbsolutePath();

        }

        /* (non-Javadoc)

         * @see org.gvsig.fmap.data.Resource#doChanged()

         */

        protected void doChanged() {

                this.updateLastModified();

        }

        protected void updateLastModified(){

                this.fileLastModified = this.file.lastModified();

        }

        protected void checkChanged() throws ResourceChangedException{

                if (this.isEditing()){

                        return;

                }

                if (this.fileLastModified == 0){

                        return;

                }

                if (this.fileLastModified < this.file.lastModified()){

                        this.changed();

                        throw new ResourceChangedException(this.getDescription());

                }

        }

        /* (non-Javadoc)

         * @see org.gvsig.fmap.data.Resource#doDispose()

         */

        protected void doDispose() throws DataException{

                this.file = null;

        }

        public boolean isEditable(){

                return this.getFile().canWrite();

        }

        protected void editing(){

                this.editing=true;

        }

        protected boolean isEditing(){

                return this.editing;

        }

        protected void stopEditing(){

                this.editing=false;

        }

}