svn-gvsig-desktop / trunk / libraries / libDataSourceDBBaseDrivers / src / org / gvsig / data / datastores / vectorial / db / jdbc / postgresql / PostgresqlStoreUtils.java @ 20029
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package org.gvsig.data.datastores.vectorial.db.jdbc.postgresql; |
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import java.sql.Connection; |
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import java.sql.DriverManager; |
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import java.sql.ResultSet; |
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import java.sql.ResultSetMetaData; |
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import java.sql.Statement; |
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import java.util.ArrayList; |
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import java.util.Iterator; |
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import org.gvsig.data.datastores.vectorial.db.DBFeatureType; |
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import org.gvsig.data.datastores.vectorial.db.jdbc.JDBCAttributeDescriptor; |
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import org.gvsig.data.datastores.vectorial.db.jdbc.JDBCFeature; |
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import org.gvsig.data.datastores.vectorial.db.jdbc.JDBCStore; |
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import org.gvsig.data.datastores.vectorial.db.jdbc.exception.JDBCDriverNotFoundException; |
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import org.gvsig.data.datastores.vectorial.db.jdbc.exception.SQLException; |
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import org.gvsig.data.exception.InitializeException; |
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import org.gvsig.data.exception.ReadException; |
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import org.gvsig.data.vectorial.DefaultAttributeDescriptor; |
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import org.gvsig.data.vectorial.IFeature; |
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import org.gvsig.data.vectorial.IFeatureAttributeDescriptor; |
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import org.postgis.PGgeometry; |
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import com.iver.cit.gvsig.fmap.core.IGeometry; |
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import com.iver.cit.gvsig.fmap.core.ShapeFactory; |
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import com.iver.cit.gvsig.fmap.drivers.WKBParser2; |
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public class PostgresqlStoreUtils { |
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static String getJDBCUrl(String host, String db, String port) { |
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String url;
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url = "jdbc:postgresql://"+host+":" + port +"/"+db; |
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return url;
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} |
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private static void addConditionForSerialField(JDBCAttributeDescriptor attr,StringBuffer sqlSeq){ |
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sqlSeq.append(" (");
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sqlSeq.append(" column_name = '" + attr.getName() +"'"); |
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sqlSeq.append(" and table_name = '" + attr.getTableName()+ "'"); |
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if (attr.getSchemaName() != null && attr.getSchemaName().length() > 0){ |
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sqlSeq.append(" and table_schema = '" + attr.getSchemaName() +"'"); |
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} |
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sqlSeq.append(" and table_catalog = '" + attr.getCatalogName()+ "'"); |
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sqlSeq.append(")");
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} |
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private static void initializeSerialFields(Connection connection,DBFeatureType featureType) throws java.sql.SQLException{ |
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JDBCAttributeDescriptor attr; |
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ArrayList serialCandidates= new ArrayList(); |
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Iterator iter = featureType.iterator();
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while(iter.hasNext()){
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attr = (JDBCAttributeDescriptor)iter.next(); |
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if (attr.getSqlTypeName().equals("int4") && |
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attr.getTableName() != null &&
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attr.getTableName().length() > 0){
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serialCandidates.add(attr); |
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} |
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} |
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if (serialCandidates.size() == 0){ |
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return;
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} |
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Statement st = connection.createStatement();
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StringBuffer sqlSeq= new StringBuffer("select table_catalog,table_schema,table_name,column_name from information_schema.columns where column_default like 'nextval(%' and ( "); |
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iter = serialCandidates.iterator(); |
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String sql;
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int i;
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for (i=0;i<serialCandidates.size()-1;i++){ |
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attr = (JDBCAttributeDescriptor)serialCandidates.get(i); |
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addConditionForSerialField(attr,sqlSeq); |
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sqlSeq.append(" or ");
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} |
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attr = (JDBCAttributeDescriptor)serialCandidates.get(i); |
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addConditionForSerialField(attr,sqlSeq); |
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sqlSeq.append(")");
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sql=sqlSeq.toString(); |
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ResultSet rs = st.executeQuery(sql);
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while (rs.next()){
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iter = serialCandidates.iterator(); |
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while (iter.hasNext()){
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attr = (JDBCAttributeDescriptor)iter.next(); |
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if (rs.getString("column_name").equals(attr.getName())){ |
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attr.setAutoIncrement(true);
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serialCandidates.remove(attr); |
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break;
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} |
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} |
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} |
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} |
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static DBFeatureType getFeatureType(Connection connection, PostgresqlStoreParameters params) throws ReadException{ |
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DBFeatureType featureType = new DBFeatureType();
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String[] ids =params.getFieldsId(); |
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int i;
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loadFieldsToFeatureType(connection, params, featureType); |
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//Inicializamos los IDs
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JDBCAttributeDescriptor attr; |
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for (i=0;i<ids.length;i++){ |
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try {
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attr = (JDBCAttributeDescriptor)featureType.get(ids[i]); |
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} catch (IndexOutOfBoundsException e){ |
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throw new InitializeException( |
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PostgresqlStore.DATASTORE_NAME, |
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new Exception("Id Field '"+ ids[i] +"' not Found")); |
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} |
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attr.setPrimaryKey(true);
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} |
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featureType.setFieldsId(ids); |
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//Inicializamos los 'serial' ya que en postgres el
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//'isAutonumeric' devuelve false
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// try{
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// initializeSerialFields(connection,featureType);
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// } catch (java.sql.SQLException e) {
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// throw new InitializeException(PostgresqlStore.DATASTORE_NAME,e);
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//
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// }
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//
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//Inicializar campos geometricos si los hubiese
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//TODO Datos geometricos
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//Inicializar la geometria por defecto
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if (params.getDefaultGeometryField() != null && params.getDefaultGeometryField() != ""){ |
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if (featureType.getFieldIndex(params.getDefaultGeometryField())< 0){ |
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throw new InitializeException( |
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PostgresqlStore.DATASTORE_NAME, |
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new Exception("Geometry Field '"+ params.getDefaultGeometryField() +"' not Found")); |
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} |
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attr = (JDBCAttributeDescriptor)featureType.get(params.getDefaultGeometryField()); |
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if (attr.getDataType() != IFeatureAttributeDescriptor.TYPE_GEOMETRY){
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throw new InitializeException( |
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PostgresqlStore.DATASTORE_NAME, |
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new Exception("Field '"+ params.getDefaultGeometryField() +"' isn't a geometry")); |
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} |
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featureType.setDefaultGeometry(params.getDefaultGeometryField()); |
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} |
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return featureType;
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} |
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private static void loadFieldsToFeatureType(Connection conn,PostgresqlStoreParameters params,DBFeatureType featureType) throws ReadException{ |
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String sql=""; |
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String columns=params.getFieldsString();
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boolean fillTableData;
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if (params.getSqlSoure() != null){ |
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sql = params.getSqlSoure(); |
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fillTableData = false;
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} else {
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sql = "Select "+columns+" from " + params.tableID(); |
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fillTableData = true;
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} |
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try {
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Statement stAux = conn.createStatement();
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stAux.setFetchSize(1);
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ResultSet rs = stAux.executeQuery(sql);
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ResultSetMetaData rsMetadata = rs.getMetaData();
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int i;
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featureType.setTableID(params.tableID()); |
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JDBCAttributeDescriptor attr; |
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for (i=1;i<=rsMetadata.getColumnCount();i++){ |
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attr = getAttributeFromJDBC(conn,rsMetadata,i); |
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featureType.add(attr); |
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attr.setOrdinal(i-1);
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attr.setCatalogName(params.getDb()); |
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if (fillTableData){
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attr.setSchemaName(params.getSchema()); |
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attr.setTableName(params.getTableName()); |
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} |
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} |
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rs.close(); |
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stAux.close(); |
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} catch (java.sql.SQLException e) {
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throw new SQLException(sql,"getFeatureType",e); |
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} |
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} |
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private static JDBCAttributeDescriptor getAttributeFromJDBC(Connection conn,ResultSetMetaData rsMetadata,int colIndex) throws SQLException{ |
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JDBCAttributeDescriptor column= new JDBCAttributeDescriptor();
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try {
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column.setName(rsMetadata.getColumnName(colIndex)); |
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column.setCaseSensitive(rsMetadata.isCaseSensitive(colIndex)); |
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column.setSqlType(rsMetadata.getColumnType(colIndex)); |
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column.setAllowNull(rsMetadata.isNullable(colIndex) == ResultSetMetaData.columnNullable);
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column.setAutoIncrement(rsMetadata.isAutoIncrement(colIndex)); |
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column.setReadOnly(rsMetadata.isReadOnly(colIndex)); |
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column.setWritable(rsMetadata.isWritable(colIndex)); |
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column.setClassName(rsMetadata.getColumnClassName(colIndex)); |
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column.setCatalogName(rsMetadata.getCatalogName(colIndex)); |
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column.setDefinitelyWritable(rsMetadata.isDefinitelyWritable(colIndex)); |
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column.setLabel(rsMetadata.getColumnLabel(colIndex)); |
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column.setSchemaName(rsMetadata.getSchemaName(colIndex)); |
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column.setTableName(rsMetadata.getTableName(colIndex)); |
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column.setCatalogName(rsMetadata.getCatalogName(colIndex)); |
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column.setSqlTypeName(rsMetadata.getColumnTypeName(colIndex)); |
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column.setSearchable(rsMetadata.isSearchable(colIndex)); |
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column.setSigned(rsMetadata.isSigned(colIndex)); |
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column.setCurrency(rsMetadata.isCurrency(colIndex)); |
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column.setPrecision(rsMetadata.getPrecision(colIndex)); |
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column.setSize(rsMetadata.getColumnDisplaySize(colIndex)); |
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switch (rsMetadata.getColumnType(colIndex)) {
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case java.sql.Types.INTEGER:
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column.setType(IFeatureAttributeDescriptor.TYPE_INT); |
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break;
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case java.sql.Types.BIGINT:
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column.setType(IFeatureAttributeDescriptor.TYPE_LONG); |
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break;
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case java.sql.Types.REAL:
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column.setType(IFeatureAttributeDescriptor.TYPE_DOUBLE); |
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break;
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case java.sql.Types.DOUBLE:
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column.setType(IFeatureAttributeDescriptor.TYPE_DOUBLE); |
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break;
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case java.sql.Types.CHAR:
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column.setType(IFeatureAttributeDescriptor.TYPE_STRING); |
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break;
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case java.sql.Types.VARCHAR:
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column.setType(IFeatureAttributeDescriptor.TYPE_STRING); |
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break;
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case java.sql.Types.FLOAT:
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column.setType(IFeatureAttributeDescriptor.TYPE_FLOAT); |
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break;
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case java.sql.Types.DECIMAL:
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column.setType(IFeatureAttributeDescriptor.TYPE_FLOAT); |
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break;
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case java.sql.Types.DATE:
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column.setType(IFeatureAttributeDescriptor.TYPE_DATE); |
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break;
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case java.sql.Types.BOOLEAN:
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column.setType(IFeatureAttributeDescriptor.TYPE_BOOLEAN); |
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break;
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case java.sql.Types.OTHER:
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if (column.getSqlTypeName().equalsIgnoreCase("geometry")){ |
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column.setType(IFeatureAttributeDescriptor.TYPE_GEOMETRY); |
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break;
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} |
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//No hacemos break para que se quede en default
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default:
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column.setType(IFeatureAttributeDescriptor.TYPE_OBJECT); |
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break;
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} |
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} catch (java.sql.SQLException e){
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throw new SQLException("","load attribute definition",e); |
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} |
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return column;
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} |
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static String getFilterForID(DBFeatureType fType, IFeature feature){ |
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return getFilterForID(fType, getPkFromFeature(feature,fType));
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} |
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static String getFilterForID(DBFeatureType fType, Object[] featureKey){ |
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//TODO: Ojo para los multiples
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if (fType.getFieldsId().length != 1) |
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throw new UnsupportedOperationException("ID fields > 1"); |
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String id =fType.getFieldsId()[0]; |
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return id + " = " + objectToSqlString(featureKey[0]); |
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} |
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static String objectToSqlString(Object obj){ |
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if (obj instanceof String){ |
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return "'"+ scapeString((String)obj) +"'"; |
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} else if (obj == null){ |
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return "null"; |
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}else{
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// OJO con otros tipos!!
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return obj.toString();
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} |
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} |
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static String scapeString(String str){ |
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return str.replace("'", "''"); |
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} |
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static Connection getConnection(String dbUrl, String dbUser, String dbPass) throws InitializeException { |
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//TODO: Aqu? habria que implementar la llamada
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// al Resource Manager para comprobar si ya hay
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// una connexion a la BD
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String connID = getConnectionResourceID(dbUrl, dbUser);
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Connection conn = null; |
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// IResource res = ResourceManager.getResourceManager().getResource(connID);
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try {
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Class.forName("org.postgresql.Driver"); |
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} catch (ClassNotFoundException e) { |
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throw new JDBCDriverNotFoundException("org.postgresql.Driver",e); |
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} |
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try {
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conn = DriverManager.getConnection(dbUrl, dbUser, dbPass);
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conn.setAutoCommit(false);
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} catch (java.sql.SQLException e1) {
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throw new InitializeException(PostgresqlStore.DATASTORE_NAME,e1); |
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} |
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//TODO: Registrar en el Resource manager
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// ResourceManager.getResourceManager().addResource(res);
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return conn;
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} |
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static String getConnectionResourceID(String dbUrl,String dbUser){ |
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return PostgresqlStore.CONNECTION_STRING+";"+dbUrl+";"+dbUser; |
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} |
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protected static Object[] getPkFromResulset(ResultSet rs, DBFeatureType featureType) throws java.sql.SQLException{ |
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String[] fieldsId = featureType.getFieldsId(); |
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Object[] result = new Object[fieldsId.length]; |
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for (int i=0;i<fieldsId.length;i++){ |
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result[i] = rs.getObject(fieldsId[i]); |
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} |
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return result;
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} |
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protected static Object[] getPkFromFeature(IFeature feature, DBFeatureType featureType){ |
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String[] fieldsId = featureType.getFieldsId(); |
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Object[] result = new Object[fieldsId.length]; |
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for (int i=0;i<fieldsId.length;i++){ |
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result[i] = feature.get(fieldsId[i]); |
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} |
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return result;
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} |
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static IFeature createFeature(JDBCStore store,ResultSet rs,DBFeatureType featureType) throws ReadException{ |
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JDBCFeature feature=null;
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Object[] pk; |
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try {
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pk = getPkFromResulset(rs, featureType); |
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feature=new PostgresqlFeature(featureType,store,pk);
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Iterator iter = featureType.iterator();
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IGeometry geom = null;
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while (iter.hasNext()) {
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IFeatureAttributeDescriptor fad=(IFeatureAttributeDescriptor)iter.next(); |
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if (fad.getDataType().equals(IFeatureAttributeDescriptor.TYPE_GEOMETRY)) {
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PGgeometry data =(PGgeometry)rs.getObject(fad.getName()); |
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if (data == null) { |
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geom = null;
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} else{
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geom = PostGIS2Geometry.getGeneralPath(data); |
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} |
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feature.setGeometry(fad.getName(),geom); |
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} else {
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feature.set(fad.getName(), rs.getObject(fad.getName())); |
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} |
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} |
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return feature;
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} catch (java.sql.SQLException e) {
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throw new ReadException("CreateFeature",e); |
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} |
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} |
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static String addLimitsToSQL(String aSql,int fetchSize,int page){ |
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return aSql+ " limit " + fetchSize + " offset " + (fetchSize*page); |
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} |
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} |
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