svn-gvsig-desktop / 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 / FetchFeatureTypeOperation.java @ 44678
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package org.gvsig.fmap.dal.store.jdbc2.spi.operations; |
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|
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import java.sql.Connection; |
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import java.sql.DatabaseMetaData; |
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import java.sql.ResultSet; |
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import java.sql.ResultSetMetaData; |
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import java.sql.SQLException; |
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import java.sql.Statement; |
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import java.util.ArrayList; |
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import java.util.List; |
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import org.apache.commons.collections.CollectionUtils; |
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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; |
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import org.gvsig.fmap.dal.DataTypes; |
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import org.gvsig.fmap.dal.exception.DataException; |
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import org.gvsig.fmap.dal.feature.EditableFeatureAttributeDescriptor; |
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import org.gvsig.fmap.dal.feature.EditableFeatureType; |
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import org.gvsig.fmap.dal.store.jdbc2.spi.JDBCSQLBuilderBase; |
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import org.gvsig.fmap.dal.store.jdbc2.JDBCHelper; |
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import org.gvsig.fmap.dal.store.jdbc2.JDBCUtils; |
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import org.gvsig.fmap.dal.store.jdbc2.OperationsFactory.TableReference; |
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import org.gvsig.fmap.geom.Geometry; |
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import org.gvsig.fmap.geom.GeometryLocator; |
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import org.gvsig.fmap.geom.type.GeometryType; |
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import static org.gvsig.fmap.dal.store.jdbc2.spi.operations.AbstractConnectionOperation.LOGGER; |
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import org.gvsig.tools.dataTypes.DataType; |
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|
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@SuppressWarnings("UseSpecificCatch") |
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public class FetchFeatureTypeOperation extends AbstractConnectionOperation { |
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private final EditableFeatureType featureType; |
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protected final TableReference table; |
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private final List<String> primaryKeys; |
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private final String defaultGeometryColumn; |
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private final IProjection crs; |
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|
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public FetchFeatureTypeOperation(
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JDBCHelper helper |
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) { |
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this(helper, null, null, null, null, null); |
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} |
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|
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public FetchFeatureTypeOperation(
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JDBCHelper helper, |
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EditableFeatureType featureType, |
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String defaultGeometryColumn,
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IProjection crs |
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) { |
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this(helper, featureType, null, null, defaultGeometryColumn, crs); |
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} |
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|
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public FetchFeatureTypeOperation(
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JDBCHelper helper, |
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EditableFeatureType featureType, |
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TableReference table, |
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List<String> primaryKeys, |
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String defaultGeometryColumn,
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IProjection crs |
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) { |
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super(helper);
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this.featureType = featureType;
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this.table = table;
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this.primaryKeys = primaryKeys;
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this.defaultGeometryColumn = defaultGeometryColumn;
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this.crs = crs;
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} |
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@Override
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public final Object perform(Connection conn) throws DataException { |
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this.fetch(conn);
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return true; |
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} |
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|
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protected TableReference getTable() {
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return this.table; |
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} |
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|
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public void fetch(Connection conn) throws DataException { |
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List<String> pks = this.primaryKeys; |
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Statement st = null; |
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ResultSet rs = null; |
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try {
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if (CollectionUtils.isEmpty(pks)) {
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if (table.hasSubquery()) {
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LOGGER.info("Searching pk in a table with a subquery ("+table.toString()+"."); |
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} |
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pks = this.getPrimaryKeysFromMetadata(conn, null, table.getSchema(), table.getTable()); |
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if (CollectionUtils.isEmpty(pks)) {
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pks = getPrimaryKeysFromInformationSchema(conn); |
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} |
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} |
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st = conn.createStatement(); |
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st.setFetchSize(1);
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rs = JDBCUtils.executeQuery(st, this.getSQLToRetrieveFirstRowOfTable());
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ResultSetMetaData rsMetadata = rs.getMetaData();
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fetchFeatureTypeFromMetadata(conn, rsMetadata, pks); |
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} catch (SQLException ex) { |
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throw new RuntimeException("Can't fecth feature type.",ex); |
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} finally {
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JDBCUtils.closeQuietly(rs); |
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JDBCUtils.closeQuietly(st); |
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} |
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} |
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public String getSQLToRetrieveFirstRowOfTable() { |
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JDBCSQLBuilderBase sqlbuilder = this.createSQLBuilder();
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sqlbuilder.select().column().all(); |
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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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sqlbuilder.select().limit(1);
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String sql = sqlbuilder.toString();
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return sql;
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} |
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public void fetchFeatureTypeFromMetadata(Connection conn, ResultSetMetaData rsMetadata) throws SQLException { |
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this.fetchFeatureTypeFromMetadata(conn, rsMetadata, new ArrayList<String>()); |
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} |
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protected void fetchFeatureTypeFromMetadata(Connection conn, ResultSetMetaData rsMetadata, List<String> pks) throws SQLException { |
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int i;
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int geometriesColumns = 0; |
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String lastGeometry = null; |
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EditableFeatureAttributeDescriptor attr; |
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boolean firstGeometryAttrFound = false; |
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for (i = 1; i <= rsMetadata.getColumnCount(); i++) { |
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attr = getAttributeFromMetadata(featureType, conn, rsMetadata, i); |
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if ( isInPrimaryKeys(pks,attr) ) {
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attr.setIsPrimaryKey(true);
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} |
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if (attr.getType() == DataTypes.GEOMETRY) {
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geometriesColumns++; |
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lastGeometry = attr.getName(); |
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// Set the default geometry attribute if it is the one
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// given as parameter or it is the first one, just in case.
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if (!firstGeometryAttrFound || lastGeometry.equals(defaultGeometryColumn)) {
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firstGeometryAttrFound = true;
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featureType.setDefaultGeometryAttributeName(lastGeometry); |
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} |
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} |
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} |
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if (defaultGeometryColumn == null && geometriesColumns == 1) { |
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featureType.setDefaultGeometryAttributeName(lastGeometry); |
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} |
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if (crs != null && featureType.getDefaultGeometryAttribute() != null) { |
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((EditableFeatureAttributeDescriptor) featureType.getDefaultGeometryAttribute()).setSRS(crs); |
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} |
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} |
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protected boolean isInPrimaryKeys(List<String> pks, EditableFeatureAttributeDescriptor attr) { |
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if( pks == null || attr == null ) { |
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return false; |
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} |
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// En algunos gestores de BBDD, los nombres obtenidos de las pks de los
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// metadados no coinciden con los nombres de los campos ya que unos estan
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// en mayusculas y otros en minusculas, asi que en lugar de usar un "contains"
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// nos los recorremos y comparamos con IgnoreCase.
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for (String pk : pks) { |
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if( StringUtils.equalsIgnoreCase(pk, attr.getName()) ) {
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return true; |
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} |
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} |
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return false; |
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} |
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protected List<String> getPrimaryKeysFromMetadata( |
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Connection conn,
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String catalog,
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String schema,
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String table) throws SQLException { |
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ResultSet rsPrimaryKeys = null; |
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ResultSet rs = null; |
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try {
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DatabaseMetaData metadata = conn.getMetaData();
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rs = metadata.getTables(catalog, schema, table, null);
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if (!rs.next()) {
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// No tables found with default values, ignoring catalog
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rs.close(); |
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catalog = null;
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schema = null;
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rs = metadata.getTables(catalog, schema, table, null);
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if (!rs.next()) {
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// table not found
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return null; |
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} else if (rs.next()) { |
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// More that one, cant identify
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return null; |
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} |
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} else if (rs.next()) { |
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// More that one, cant identify
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return null; |
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} |
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rsPrimaryKeys = metadata.getPrimaryKeys(catalog, schema, table); |
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List pks = new ArrayList(); |
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while (rsPrimaryKeys.next()) {
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pks.add(rsPrimaryKeys.getString("COLUMN_NAME"));
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} |
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return pks;
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} catch (SQLException e) { |
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return null; |
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} finally {
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JDBCUtils.closeQuietly(rs); |
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JDBCUtils.closeQuietly(rsPrimaryKeys); |
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} |
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} |
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protected List<String> getPrimaryKeysFromInformationSchema(Connection conn) throws SQLException { |
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String sql = getSQLToRetrievePrimaryKeysFromInformationSchema();
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Statement st = null; |
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ResultSet rs = null; |
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List<String> pks = new ArrayList(); |
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try {
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st = conn.createStatement(); |
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rs = JDBCUtils.executeQuery(st, sql); |
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while (rs.next()) {
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pks.add(rs.getString(1));
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} |
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if (pks.isEmpty()) {
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return null; |
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} |
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return pks;
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} catch (Exception ex) { |
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return pks;
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} finally {
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JDBCUtils.closeQuietly(rs); |
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JDBCUtils.closeQuietly(st); |
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} |
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} |
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public String getSQLToRetrievePrimaryKeysFromInformationSchema() throws SQLException { |
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JDBCSQLBuilderBase sqlbuilder = this.createSQLBuilder();
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ExpressionBuilder expbuilder = sqlbuilder.expression(); |
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sqlbuilder.select().column().name("COLUMN_NAME");
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sqlbuilder.select().column().name("CONSTRAINT_TYPE");
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sqlbuilder.select().from().custom( |
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"INFORMATION_SCHEMA.table_constraints t_cons "
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+ "inner join INFORMATION_SCHEMA.key_column_usage c on "
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+ "c.constraint_catalog = t_cons.constraint_catalog and "
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+ "c.table_schema = t_cons.table_schema and "
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+ "c.table_name = t_cons.table_name and "
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+ "c.constraint_name = t_cons.constraint_name "
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); |
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sqlbuilder.select().where().set( |
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expbuilder.like( |
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expbuilder.custom("c.TABLE_NAME"),
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expbuilder.constant(table.getTable()) |
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) |
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); |
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if( table.hasSchema() ) {
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sqlbuilder.select().where().and( |
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expbuilder.like( |
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expbuilder.custom("c.TABLE_SCHEMA"),
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expbuilder.constant(table.getSchema()) |
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) |
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); |
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} |
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// if (catalog != null) {
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// sqlbuilder.select().where().and(
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// expbuilder.like(
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// expbuilder.custom("c.CONSTRAINT_CATALOG"),
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// expbuilder.constant(catalog)
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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.eq( |
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expbuilder.column("CONSTRAINT_TYPE"),
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expbuilder.constant("PRIMARY KEY")
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) |
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); |
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return sqlbuilder.toString();
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} |
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protected EditableFeatureAttributeDescriptor getAttributeFromMetadata(
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EditableFeatureType type, |
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Connection conn,
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ResultSetMetaData rsMetadata,
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int colIndex
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) throws SQLException { |
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EditableFeatureAttributeDescriptor attr = type.add( |
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rsMetadata.getColumnName(colIndex), |
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this.getDataTypeFromMetadata(rsMetadata, colIndex)
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); |
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attr.setAllowNull( |
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rsMetadata.isNullable(colIndex) == ResultSetMetaData.columnNullable
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); |
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attr.setIsAutomatic(rsMetadata.isAutoIncrement(colIndex)); |
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attr.setIsReadOnly(rsMetadata.isReadOnly(colIndex)); |
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attr.setSize(rsMetadata.getColumnDisplaySize(colIndex)); |
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attr.setScale(rsMetadata.getScale(colIndex)); |
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attr.setPrecision(rsMetadata.getPrecision(colIndex)); |
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switch(attr.getType()) {
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case DataTypes.BYTE:
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attr.setPrecision(DataType.BYTE_DEFAULT_PRECISION); |
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attr.setScale(DataType.SCALE_NONE); |
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break;
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case DataTypes.INT:
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attr.setPrecision(DataType.INT_DEFAULT_PRECISION); |
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attr.setScale(DataType.SCALE_NONE); |
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break;
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case DataTypes.LONG:
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attr.setPrecision(DataType.LONG_DEFAULT_PRECISION); |
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attr.setScale(DataType.SCALE_NONE); |
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break;
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case DataTypes.FLOAT:
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attr.setPrecision(DataType.FLOAT_DEFAULT_PRECISION); |
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attr.setScale(DataType.FLOAT_DEFAULT_SCALE); |
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break;
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case DataTypes.DOUBLE:
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attr.setPrecision(DataType.DOUBLE_DEFAULT_PRECISION); |
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attr.setScale(DataType.DOUBLE_DEFAULT_SCALE); |
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break;
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case DataTypes.OBJECT:
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attr.setAdditionalInfo( |
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"SQLType",
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rsMetadata.getColumnType(colIndex) |
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); |
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attr.setAdditionalInfo( |
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"SQLTypeName",
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rsMetadata.getColumnTypeName(colIndex) |
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); |
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break;
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case DataTypes.GEOMETRY:
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this.fetchGeometryTypeAndSRS(attr, rsMetadata, colIndex);
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break;
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} |
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return attr;
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} |
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protected int getDataTypeFromMetadata( |
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ResultSetMetaData rsMetadata,
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int colIndex
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) throws SQLException { |
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switch (rsMetadata.getColumnType(colIndex)) {
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case java.sql.Types.TINYINT:
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return DataTypes.BYTE;
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case java.sql.Types.INTEGER:
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return DataTypes.INT;
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case java.sql.Types.BIGINT:
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return DataTypes.LONG;
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case java.sql.Types.REAL:
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case java.sql.Types.FLOAT:
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return DataTypes.FLOAT;
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case java.sql.Types.DOUBLE:
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return DataTypes.DOUBLE;
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case java.sql.Types.NUMERIC:
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case java.sql.Types.DECIMAL:
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return DataTypes.DECIMAL;
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case java.sql.Types.CHAR:
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case java.sql.Types.VARCHAR:
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case java.sql.Types.LONGVARCHAR:
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return DataTypes.STRING;
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case java.sql.Types.DATE:
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return DataTypes.DATE;
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case java.sql.Types.TIME:
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return DataTypes.TIME;
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case java.sql.Types.TIMESTAMP:
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return DataTypes.TIMESTAMP;
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case java.sql.Types.BOOLEAN:
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case java.sql.Types.BIT:
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return DataTypes.BOOLEAN;
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case java.sql.Types.BLOB:
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case java.sql.Types.BINARY:
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case java.sql.Types.LONGVARBINARY:
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return DataTypes.BYTEARRAY;
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default:
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String typeName = rsMetadata.getColumnTypeName(colIndex);
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if( "geometry".equalsIgnoreCase(typeName) ) { |
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return DataTypes.GEOMETRY;
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} |
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return DataTypes.OBJECT;
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} |
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} |
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|
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/**
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* Inicializa el tipo, subtipo y SRS del attributo de tipo geometria.
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*
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* @param attr
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* @param rsMetadata
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* @param colIndex
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*/
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protected void fetchGeometryTypeAndSRS( |
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EditableFeatureAttributeDescriptor attr, |
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ResultSetMetaData rsMetadata,
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int colIndex
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) { |
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if( attr.getType()!=DataTypes.GEOMETRY ) {
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return;
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} |
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try {
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GeometryType geomType = GeometryLocator.getGeometryManager().getGeometryType( |
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Geometry.TYPES.GEOMETRY, |
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Geometry.SUBTYPES.GEOM2D |
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); |
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attr.setGeometryType(geomType); |
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attr.setSRS((IProjection)null);
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} catch (Exception ex) { |
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LOGGER.warn("Can't get default geometry type.",ex);
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} |
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} |
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|
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} |