Revision 45008 trunk/org.gvsig.desktop/org.gvsig.desktop.compat.cdc/org.gvsig.fmap.dal/org.gvsig.fmap.dal.db/org.gvsig.fmap.dal.db.jdbc/src/main/java/org/gvsig/fmap/dal/store/jdbc2/spi/operations/CalculateEnvelopeOfColumnOperation.java
| CalculateEnvelopeOfColumnOperation.java | ||
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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 java.util.List; |
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import org.apache.commons.lang3.StringUtils; |
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import org.cresques.cts.IProjection; |
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import org.gvsig.expressionevaluator.ExpressionBuilder.Variable; |
| ... | ... | |
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import org.gvsig.fmap.dal.store.jdbc2.spi.JDBCSQLBuilderBase; |
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import static org.gvsig.fmap.dal.store.jdbc2.spi.JDBCSQLBuilderBase.PROP_TABLE; |
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import org.gvsig.fmap.geom.Geometry; |
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import org.gvsig.fmap.geom.GeometryUtils; |
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import org.gvsig.fmap.geom.primitive.Envelope; |
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public class CalculateEnvelopeOfColumnOperation extends AbstractConnectionOperation {
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| ... | ... | |
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} |
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public String getSQL() {
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if (this.helper.hasSpatialFunctions()) {
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return getSQLWithAggregate(); |
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} else {
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return getSQLWihoutAggregate(); |
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} |
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} |
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public String getSQLWihoutAggregate() {
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//Crear un select que devuelve todas las lineas |
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JDBCSQLBuilderBase sqlbuilder = this.createSQLBuilder(); |
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GeometryExpressionBuilder expbuilder = sqlbuilder.expression(); |
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sqlbuilder.select().column().name(columnName).as_geometry(); |
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sqlbuilder.select().from().table() |
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.database(this.table.getDatabase()) |
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.schema(this.table.getSchema()) |
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.name(this.table.getTable()); |
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sqlbuilder.select().from().subquery(this.table.getSubquery()); |
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if (!StringUtils.isEmpty(baseFilter)) {
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sqlbuilder.select().where().set(expbuilder.custom(baseFilter)); |
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} |
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// todo ? |
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sqlbuilder.select().where().and(expbuilder.not_is_null(expbuilder.column(columnName))); |
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String sql = sqlbuilder.select().toString(); |
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return sql; |
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} |
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public String getSQLWithAggregate() {
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// |
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// Parece ser que en versiones anteriores a SQL Server 2012 no esta |
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// disponible la funcion ST_ExtentAggregate. |
| ... | ... | |
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// |
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JDBCSQLBuilderBase sqlbuilder = this.createSQLBuilder(); |
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GeometryExpressionBuilder expbuilder = sqlbuilder.expression(); |
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sqlbuilder.select().column().value( |
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// expbuilder.ifnull( |
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// expbuilder.column(columnName), |
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// expbuilder.constant(null), |
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// expbuilder.ifnull(
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// expbuilder.column(columnName),
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// expbuilder.constant(null),
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expbuilder.as_geometry( |
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expbuilder.ST_ExtentAggregate( |
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expbuilder.column(columnName) |
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) |
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expbuilder.ST_ExtentAggregate(
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expbuilder.column(columnName)
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)
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) |
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// ) |
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// )
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); |
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// sqlbuilder.select().group_by(expbuilder.column(columnName)); |
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sqlbuilder.select().from().table() |
| ... | ... | |
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); |
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} |
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} else {
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sqlbuilder.select().where().set( expbuilder.custom(baseFilter) );
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sqlbuilder.select().where().set(expbuilder.custom(baseFilter));
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if (limit != null) {
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sqlbuilder.select().where().and( |
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expbuilder.ST_Intersects( |
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expbuilder.ST_Envelope( |
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expbuilder.column(columnName) |
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), |
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expbuilder.ST_Envelope( |
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expbuilder.geometry(limit.getGeometry(), crs) |
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) |
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expbuilder.ST_Envelope(
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expbuilder.column(columnName)
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),
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expbuilder.ST_Envelope(
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expbuilder.geometry(limit.getGeometry(), crs)
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)
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) |
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); |
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} |
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} |
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sqlbuilder.select().where().and(
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expbuilder.not_is_null(expbuilder.column(columnName)) |
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sqlbuilder.select().where().and( |
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expbuilder.not_is_null(expbuilder.column(columnName))
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); |
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this.helper.processSpecialFunctions(sqlbuilder, featureType, null); |
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sqlbuilder.setProperties( |
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Variable.class,
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Variable.class, |
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PROP_TABLE, table |
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); |
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String sql = sqlbuilder.select().toString(); |
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return sql; |
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} |
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public Envelope calculateEnvelopeOfColumn(Connection conn) throws DataException {
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if (this.helper.hasSpatialFunctions()) {
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return calculateEnvelopeOfColumnWithAggregate(conn); |
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} else {
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return calculateEnvelopeOfColumnWithoutAggregate(conn); |
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} |
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} |
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private Envelope calculateEnvelopeOfColumnWithAggregate(Connection conn) throws DataException {
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String sql = this.getSQL(); |
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Statement st = null; |
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ResultSet rs = null; |
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try {
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st = conn.createStatement(); |
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try {
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LOGGER.debug("execute query SQL:"+sql);
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LOGGER.debug("execute query SQL:" + sql);
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rs = st.executeQuery(sql); |
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// No llamo al de JDBC utils para que no meta el error |
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// en el log. |
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// rs = JDBCUtils.executeQuery(st, sql); |
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} catch(SQLException ex) {
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} catch (SQLException ex) {
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// Para calcular el envelope se esta lanzando una colsulta como: |
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// SELECT ST_AsBinary(ST_Extent("geometry"))
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// FROM "gis_osm_roads_free_1" |
| ... | ... | |
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} |
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} |
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private Envelope calculateEnvelopeOfColumnWithoutAggregate(Connection conn) throws DataException {
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// crear una sql que devuelva un resultarSet |
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//bucle |
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// iif instacia de string: cast string |
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// GeometryLocator.getGeometryManager().createFrom("")
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// elif instance de bytearray con cast a bytearray: |
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// GeometryLocator.getGeometryManager().createFrom("")
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// else: |
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// coerceToGeometry |
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// |
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// |
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// Notas: atrapar error, y si se produce error hago un coerceToGeometry |
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String sql = this.getSQL(); |
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Statement st = null; |
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ResultSet rs = null; |
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try {
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st = conn.createStatement(); |
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try {
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LOGGER.debug("execute query SQL:" + sql);
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rs = st.executeQuery(sql); |
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// No llamo al de JDBC utils para que no meta el error |
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// en el log. |
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// rs = JDBCUtils.executeQuery(st, sql); |
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} catch (SQLException ex) {
|
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// Para calcular el envelope se esta lanzando una colsulta como: |
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// SELECT ST_AsBinary(ST_Extent("geometry"))
|
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// FROM "gis_osm_roads_free_1" |
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// WHERE ( ("geometry") IS NOT NULL )
|
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// Que falla cuando no hay registros al recibir un NULL en el |
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// ST_AsBinary. |
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// A falta de una forma mejor de detectar eso, si peta en este |
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// punto asumiremos que no hay registros en la consulta y devolveremos |
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// null como envelope. |
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return null; |
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} |
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Envelope finalEnvelope = GeometryUtils.createEnvelope(Geometry.SUBTYPES.GEOM2D); |
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while (rs.next()) {
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String geometryString = rs.getString("geometry");
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Geometry geometry = GeometryUtils.createFrom(geometryString); |
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finalEnvelope.add(geometry); |
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} |
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// Geometry geom = this.helper.getGeometryFromColumn(rs, 1); |
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// if (geom == null) {
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// return null; |
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// } |
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// return geom.getEnvelope(); |
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return finalEnvelope; |
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} catch (SQLException ex) {
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throw new JDBCSQLException(ex); |
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} finally {
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JDBCUtils.closeQuietly(st); |
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JDBCUtils.closeQuietly(rs); |
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} |
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|
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} |
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|
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} |
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