svn-gvsig-desktop / branches / v10 / extensions / extOracleSpatial / src / es / prodevelop / cit / gvsig / fmap / drivers / jdbc / oracle / OracleSpatialFeatureIterator.java @ 17691
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2006 Prodevelop and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Ib??ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* Prodevelop Integraci?n de Tecnolog?as SL
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* Conde Salvatierra de ?lava , 34-10
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* 46004 Valencia
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* Spain
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*
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* +34 963 510 612
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* +34 963 510 968
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* gis@prodevelop.es
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* http://www.prodevelop.es
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*/
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package es.prodevelop.cit.gvsig.fmap.drivers.jdbc.oracle; |
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import com.hardcode.gdbms.engine.values.Value; |
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import com.iver.cit.gvsig.fmap.DriverException; |
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import com.iver.cit.gvsig.fmap.core.DefaultFeature; |
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import com.iver.cit.gvsig.fmap.core.IFeature; |
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import com.iver.cit.gvsig.fmap.core.IGeometry; |
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import com.iver.cit.gvsig.fmap.drivers.IFeatureIterator; |
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// import oracle.spatial.geometry.JGeometry;
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import oracle.sql.ROWID; |
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import oracle.sql.STRUCT; |
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import java.sql.ResultSet; |
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import java.sql.SQLException; |
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import java.sql.Statement; |
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import org.apache.log4j.Logger; |
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/**
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* Oracle feature iterator. An instance of this class is returned whaen gvSIG
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* asks for a feature iterator for a new viewport.
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*
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* @author jldominguez
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*
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*/
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public class OracleSpatialFeatureIterator implements IFeatureIterator { |
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private static Logger logger = Logger.getLogger(OracleSpatialFeatureIterator.class.getName()); |
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private OracleSpatialDriver driver;
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private ResultSet rs = null; |
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private int oneBasedGeoColInd = 0; |
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private boolean useGeotools = false; |
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private Statement st; |
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/**
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* Constructor.
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*
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* @param parent the driver that creates it
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* @param _rs the result set to be iterated (already computed by the driver)
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* @param _st the statement that generated the result set. The iterator will close it.
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* @param geoColIndex index of the geometry field
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* @param _useGeotools a switch to decide if the geotools classes
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* must be used to deal with geometris
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*/
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public OracleSpatialFeatureIterator(OracleSpatialDriver parent,
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ResultSet _rs, Statement _st, int geoColIndex, boolean _useGeotools) { |
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driver = parent; |
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rs = _rs; |
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st = _st; |
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useGeotools = _useGeotools; |
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oneBasedGeoColInd = geoColIndex; |
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} |
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public boolean hasNext() throws DriverException { |
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if (rs == null) { |
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return false; |
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} |
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try {
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boolean _resp = rs.next();
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if (!_resp) {
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rs.close(); |
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st.close(); |
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} |
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return _resp;
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} |
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catch (SQLException se) { |
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logger.error("Error while doing hasNext(): " + se.getMessage());
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} |
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return false; |
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} |
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public IFeature next() throws DriverException { |
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if (rs == null) { |
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return null; |
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} |
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IFeature ife = null;
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try {
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ROWID ri = (ROWID) rs.getObject(1);
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Value[] atts = driver.getAttributes(rs, false); |
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String gid = ri.stringValue();
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STRUCT _st = (oracle.sql.STRUCT) rs.getObject(oneBasedGeoColInd); |
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IGeometry theGeom = driver.getGeometryUsing(_st, useGeotools); |
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ife = new DefaultFeature(theGeom, atts, gid);
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} |
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catch (SQLException se) { |
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logger.error("Error while doing next(): " + se.getMessage());
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} |
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return ife;
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} |
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private void showGeometrySample(IFeature ife) { |
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IGeometry geom = ife.getGeometry(); |
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int size = 80; |
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String wkt_str = geom.toJTSGeometry().toText();
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if (wkt_str.length() <= size) {
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logger.debug("Oracle driver returns geometry:\n" + wkt_str);
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} else {
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logger.debug("Oracle driver returns geometry:\n" + wkt_str.substring(0, size)); |
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} |
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} |
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public void closeIterator() throws DriverException { |
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try {
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rs.close(); |
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st.close(); |
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} |
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catch (SQLException se) { |
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throw new DriverException("SQL Exception: " + se.getMessage()); |
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} |
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} |
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/**
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* Utility method to get the oracle geometry type as a human-readable String.
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*
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* @param type the oracle geometry type
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* @return a human-readable String describing it.
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*/
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public static String getJGeometryTypeName(int type) { |
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String resp = "Unknown JGeometry type (" + type + ")"; |
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switch (type) {
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case OracleSpatialDriver.JGeometry_GTYPE_COLLECTION:
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resp = "Collection";
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break;
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case OracleSpatialDriver.JGeometry_GTYPE_CURVE:
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resp = "Curve";
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break;
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case OracleSpatialDriver.JGeometry_GTYPE_MULTICURVE:
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resp = "Multi-curve";
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break;
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case OracleSpatialDriver.JGeometry_GTYPE_MULTIPOINT:
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resp = "Multi-point";
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break;
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case OracleSpatialDriver.JGeometry_GTYPE_MULTIPOLYGON:
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resp = "Multi-polygon";
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break;
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case OracleSpatialDriver.JGeometry_GTYPE_POINT:
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resp = "Point";
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break;
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case OracleSpatialDriver.JGeometry_GTYPE_POLYGON:
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resp = "Polygon";
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break;
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} |
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return resp;
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} |
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} |