| gvSIG desktop 1

/**

 * 

 */

package com.iver.cit.gvsig.writers;

import java.io.File;

import java.io.IOException;

import java.net.URL;

import java.sql.Types;

import org.geotools.data.DefaultTransaction;

import org.geotools.data.FeatureStore;

import org.geotools.data.Transaction;

import org.geotools.data.shapefile.ShapefileDataStore;

import org.geotools.feature.AttributeType;

import org.geotools.filter.Filter;

import org.geotools.filter.FilterFactory;

import com.iver.cit.gvsig.fmap.core.FShape;

import com.iver.cit.gvsig.fmap.core.IFeature;

import com.iver.cit.gvsig.fmap.drivers.VectorialDriver;

import com.iver.cit.gvsig.fmap.drivers.VectorialFileDriver;

import com.iver.cit.gvsig.fmap.edition.EditionException;

import com.iver.cit.gvsig.fmap.edition.IRowEdited;

import com.iver.cit.gvsig.fmap.edition.IWriter;

import com.iver.cit.gvsig.fmap.edition.VectorialEditableAdapter;

import com.iver.cit.gvsig.fmap.edition.writers.AbstractWriter;

import com.iver.cit.gvsig.fmap.layers.FLyrVect;

/**

 * @author fjp

 * 

 * Example of using a Geotools dataStore to write ONLY

 * the modified features. So: you put the theme in editing mode, 

 * add, modify or delete features and when you come back to 

 * non editing mode, the changes will be saved into the original

 * shapefile.

 *

 */

public class WriterGT2Shp extends AbstractWriter {

        FilterFactory filterFactory = FilterFactory.createFilterFactory();

        FLyrVect lyrVect;

        boolean bFromShp;

        File file;

        FeatureStore featStore;

        AttributeType[] types;

        Transaction t;

        int numReg = 0;

        public WriterGT2Shp(FLyrVect lyrVect) throws IOException

        {

                this.lyrVect = lyrVect;

                VectorialEditableAdapter vea = (VectorialEditableAdapter) lyrVect.getSource();

                VectorialDriver vd = vea.getOriginalAdapter().getDriver();

                bFromShp = false;

                if (vd instanceof VectorialFileDriver)

                {

                        VectorialFileDriver vfd = (VectorialFileDriver) vd;

                        file = vfd.getFile();

                        String filePath = file.getAbsolutePath(); 

                        if ((filePath.endsWith(".shp"))

                                        || (filePath.endsWith(".SHP")))

                        {

                                bFromShp = true;

                        }

                }

        }

        /* (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.edition.IWriter#preProcess()

         */

        public void preProcess() throws EditionException {

//                feature attributes creation

                URL theUrl;

                try {

                        theUrl = file.toURL();

                        ShapefileDataStore dataStore = new ShapefileDataStore(theUrl);

                        String featureName = dataStore.getTypeNames()[0];

                        featStore = (FeatureStore) dataStore.getFeatureSource(featureName);

                        types = featStore.getSchema().getAttributeTypes();

                        t = new DefaultTransaction("handle");

                        featStore.setTransaction(t);

                        t.addAuthorization("handle");  // provide authoriztion

                        // types = new AttributeType[lyrVect.getRecordset().getFieldCount() +1];

                } catch (Exception e) {

                        e.printStackTrace();

                        throw new EditionException(e);

                }

        }

        /* (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.edition.IWriter#process(com.iver.cit.gvsig.fmap.edition.IRowEdited)

         */

        public void process(IRowEdited row) throws EditionException {

                IFeature feat = (IFeature) row.getLinkedRow();

                Object[] values = new Object[types.length];

                values[0] = feat.getGeometry().toJTSGeometry();

                for (int i=1; i < types.length; i++)

                        values[i] = feat.getAttribute(i);

                Filter theFilter = filterFactory.createFidFilter(feat.getID()); 

        try {

                // Aqu? habr?a que mirar si es una modificaci?n, a?adido o borrado

                if ((numReg % 2) == 0)

                        featStore.modifyFeatures(types, values, theFilter);

                else

                        featStore.removeFeatures(theFilter);

                        numReg++;

                } catch (IOException e) {

                        e.printStackTrace();

                        throw new EditionException(e);

                }

        }

        /* (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.edition.IWriter#postProcess()

         */

        public void postProcess() throws EditionException {

                try

                {

                        t.commit(); // commit opperations

                }

                catch (IOException io){

                        try {

                                t.rollback();

                        } catch (IOException e) {

                                e.printStackTrace();

                                throw new EditionException(e);

                        } // cancel opperations

                }

                finally {

                        try {

                                t.close();

                        } catch (IOException e) {

                                e.printStackTrace();

                                throw new EditionException(e);

                        } // free resources

                }

        }

        public String getName() {

                return "Shp Writer from Geotools";

        }

        public boolean canWriteGeometry(int gvSIGgeometryType) {

                switch (gvSIGgeometryType)

                {

                case FShape.POINT:

                        return true;

                case FShape.LINE:

                        return true;

                case FShape.POLYGON:

                        return true;

                case FShape.ARC:

                        return false;

                case FShape.ELLIPSE:

                        return false;                        

                case FShape.MULTIPOINT:

                        return true;                        

                case FShape.TEXT:

                        return false;                                                

                }

                return false;

        }

        public boolean canWriteAttribute(int sqlType) {

                switch (sqlType)

                {

                case Types.DOUBLE:

                case Types.FLOAT: 

                case Types.INTEGER:

                case Types.BIGINT:

                        return true;

                case Types.DATE:

                        return true;

                case Types.BIT:

                case Types.BOOLEAN:

                        return true;                        

                case Types.VARCHAR:

                case Types.CHAR: 

                case Types.LONGVARCHAR:

                        return true; // TODO: Revisar esto, porque no creo que admita campos muy grandes

                }

                return false;

        }

}