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.data.datastores.vectorial.file.dbf;

import java.io.File;

import java.nio.channels.FileChannel;

import java.util.Date;

import org.gvsig.data.Resource;

import org.gvsig.data.datastores.vectorial.file.IFileResource;

import org.gvsig.data.datastores.vectorial.file.dbf.utils.DbaseFile;

import org.gvsig.data.exception.CloseException;

import org.gvsig.data.exception.DataException;

import org.gvsig.data.exception.OpenException;

import org.gvsig.data.exception.ReadException;

import org.gvsig.data.exception.UnsupportedEncodingException;

import org.gvsig.data.exception.WriteException;

/**

 * @author jmvivo

 *

 */

public class DBFResource extends Resource implements IFileResource {

        protected DbaseFile dbfFile;

        protected File file;

        private boolean isOpen;

        private long fileLastModified = 0L;

        DBFResource (File aFile){

                this.file = aFile;

        }

        DbaseFile getDbf(){

                return this.dbfFile;

        }

        /* (non-Javadoc)

         * @see org.gvsig.data.Resource#getKey()

         */

        public String getKey() {

                return "DBF:"+this.file.getAbsolutePath();

        }

        /* (non-Javadoc)

         * @see org.gvsig.data.datastores.vectorial.file.IFileResource#getFile()

         */

        public File getFile() {

                return this.file;

        }

        /* (non-Javadoc)

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

         */

        public String description() {

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

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

                } else{

                        return "DBF File resource: {No file}";

                }

        }

        /* (non-Javadoc)

         * @see org.gvsig.data.Resource#doClose()

         */

        protected boolean doClose() throws CloseException{

                dbfFile.close();

                isOpen = false;

                return true;

        }

        /* (non-Javadoc)

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

         */

        protected void doDispose() throws DataException{

                this.dbfFile = null;

                this.file = null;

        }

        /* (non-Javadoc)

         * @see org.gvsig.data.Resource#doOpen()

         */

        protected boolean doOpen() throws OpenException{

                if (this.dbfFile == null){

                        this.dbfFile = new DbaseFile(this.file);

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

                } else{

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

                                this.changed();

                        }

                }

                this.dbfFile.open();

                this.isOpen=true;

                return true;

        }

        /* (non-Javadoc)

         * @see org.gvsig.data.Resource#isOpen()

         */

        public boolean isOpen() {

                return this.isOpen;

        }

        private void checkOpen() throws OpenException{

                if (!this.isOpen){

                        this.open();

                }

        }

        /**

         * @param rowIndex

         * @param fieldId

         * @return

         * @see org.gvsig.data.datastores.vectorial.file.dbf.utils.DbaseFile#getBooleanFieldValue(int, int)

         */

        public boolean getBooleanFieldValue(int rowIndex, int fieldId)  throws ReadException{

                this.checkOpen();

                return dbfFile.getBooleanFieldValue(rowIndex, fieldId);

        }

        /**

         * @return

         * @see org.gvsig.data.datastores.vectorial.file.dbf.utils.DbaseFile#getFieldCount()

         */

        public int getFieldCount() throws ReadException {

                this.checkOpen();

                return dbfFile.getFieldCount();

        }

        /**

         * @param inIndex

         * @return

         * @see org.gvsig.data.datastores.vectorial.file.dbf.utils.DbaseFile#getFieldDecimalLength(int)

         */

        public int getFieldDecimalLength(int inIndex) throws ReadException {

                this.checkOpen();

                return dbfFile.getFieldDecimalLength(inIndex);

        }

        /**

         * @param inIndex

         * @return

         * @see org.gvsig.data.datastores.vectorial.file.dbf.utils.DbaseFile#getFieldLength(int)

         */

        public int getFieldLength(int inIndex)  throws ReadException{

                this.checkOpen();

                return dbfFile.getFieldLength(inIndex);

        }

        /**

         * @param inIndex

         * @return

         * @see org.gvsig.data.datastores.vectorial.file.dbf.utils.DbaseFile#getFieldName(int)

         */

        public String getFieldName(int inIndex)  throws ReadException{

                this.checkOpen();

                return dbfFile.getFieldName(inIndex);

        }

        /**

         * @param inIndex

         * @return

         * @see org.gvsig.data.datastores.vectorial.file.dbf.utils.DbaseFile#getFieldType(int)

         */

        public char getFieldType(int inIndex)  throws ReadException{

                this.checkOpen();

                return dbfFile.getFieldType(inIndex);

        }

        /**

         * @return

         * @see org.gvsig.data.datastores.vectorial.file.dbf.utils.DbaseFile#getRecordCount()

         */

        public int getRecordCount()  throws ReadException{

                this.checkOpen();

                return dbfFile.getRecordCount();

        }

        /**

         * @param rowIndex

         * @param fieldId

         * @return

         * @see org.gvsig.data.datastores.vectorial.file.dbf.utils.DbaseFile#getStringFieldValue(int, int)

         */

        public String getStringFieldValue(int rowIndex, int fieldId)  throws ReadException{

                this.checkOpen();

                return dbfFile.getStringFieldValue(rowIndex, fieldId);

        }

        /**

         * @return

         * @see org.gvsig.data.datastores.vectorial.file.dbf.utils.DbaseFile#getWriteChannel()

         */

        public FileChannel getWriteChannel()  throws DataException{

                this.checkOpen();

                return dbfFile.getWriteChannel();

        }

        /**

         * @param rowIndex

         * @param fieldId

         * @param obj

         * @throws UnsupportedEncodingException

         * @throws WriteException

         * @see org.gvsig.data.datastores.vectorial.file.dbf.utils.DbaseFile#setFieldValue(int, int, java.lang.Object)

         */

        public void setFieldValue(int rowIndex, int fieldId, Object obj) throws UnsupportedEncodingException, WriteException{

//                FIXME: this.checkOpen();?????

                dbfFile.setFieldValue(rowIndex, fieldId, obj);

        }

        /* (non-Javadoc)

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

         */

        protected void doChanged() {

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

        }

}