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import java.sql.*;
import java.util.*;
/*
* This class is the central point for meta data extraction. It is a default implementation for all JDBC providers
* and can be sub-classed for database specific adaptations
*/
class GdaJMeta {
private static native void initIDs();
public Connection cnc;
public DatabaseMetaData md;
private HashMap<String, Boolean> current_schemas = new HashMap<String, Boolean> ();
public GdaJMeta (Connection cnc) throws Exception {
this.cnc = cnc;
this.md = cnc.getMetaData ();
}
public void schemaAddCurrent (String schema) {
current_schemas.put (GdaJValue.toLower (schema), true);
}
public boolean schemaIsCurrent (String schema) throws Exception {
return current_schemas.containsKey (GdaJValue.toLower (schema));
}
// The returned String must _never_ be NULL, but set to "" if it was NULL
public String getCatalog () throws Exception {
String s = cnc.getCatalog ();
if (s == null)
return "";
else
return s;
}
public GdaJResultSet getSchemas (String catalog, String schema) throws Exception {
return new GdaJMetaSchemas (this, catalog, schema);
}
public GdaJResultSet getTables (String catalog, String schema, String name) throws Exception {
return new GdaJMetaTables (this, catalog, schema, name);
}
public GdaJResultSet getViews (String catalog, String schema, String name) throws Exception {
return new GdaJMetaViews (this, catalog, schema, name);
}
public GdaJResultSet getColumns (String catalog, String schema, String tab_name) throws Exception {
return new GdaJMetaColumns (this, catalog, schema, tab_name);
}
// class initializer
static {
initIDs ();
}
}
/*
* Meta data retrieval is returned as instances of the class which allows a degree of
* customization depending on the type of database being accessed.
*/
abstract class GdaJMetaResultSet extends GdaJResultSet {
public Vector<GdaJColumnInfos> meta_col_infos;
protected ResultSet rs;
protected DatabaseMetaData md;
protected GdaJMeta jm;
protected GdaJMetaResultSet (int ncols, GdaJMeta jm) {
super (ncols);
this.jm = jm;
md = jm.md;
rs = null;
meta_col_infos = new Vector<GdaJColumnInfos> (0);
}
// get result set's meta data
public GdaJResultSetInfos getInfos () throws Exception {
return new GdaJMetaInfos (this);
}
abstract public boolean fillNextRow (long c_pointer) throws Exception;
}
/*
* Extends GdaJResultSetInfos for GdaJMetaResultSet
*/
class GdaJMetaInfos extends GdaJResultSetInfos {
private GdaJMetaResultSet meta;
// Constructor
public GdaJMetaInfos (GdaJMetaResultSet meta) {
super (meta.meta_col_infos);
this.meta = meta;
}
// describe a column, index starting at 0
public GdaJColumnInfos describeColumn (int col) throws Exception {
return meta.meta_col_infos.elementAt (col);
}
}
/*
* Meta data for schemas
*/
class GdaJMetaSchemas extends GdaJMetaResultSet {
String catalog = null;
String schema = null;
public GdaJMetaSchemas (GdaJMeta jm, String catalog, String schema) throws Exception {
super (4, jm);
meta_col_infos.add (new GdaJColumnInfos ("catalog_name", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("schema_name", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("schema_owner", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("schema_internal", null, java.sql.Types.BOOLEAN));
rs = jm.md.getSchemas ();
this.catalog = catalog;
this.schema = schema;
}
protected void columnTypesDeclared () {
// the catalog part cannot be NULL, but "" instead
GdaJValue cv = col_values.elementAt (0);
cv.no_null = true;
cv.convert_lc = true;
(col_values.elementAt (1)).convert_lc = true;
}
public boolean fillNextRow (long c_pointer) throws Exception {
if (! rs.next ())
return false;
GdaJValue cv;
if (catalog != null) {
String s = rs.getString (2);
if (s != catalog)
return fillNextRow (c_pointer);
}
if (schema != null) {
String s = rs.getString (1);
if (s != schema)
return fillNextRow (c_pointer);
}
cv = col_values.elementAt (0);
cv.setCValue (rs, 1, c_pointer);
cv = col_values.elementAt (1);
cv.setCValue (rs, 0, c_pointer);
cv = col_values.elementAt (3);
cv.setCBoolean (c_pointer, 3, false);
return true;
}
}
/*
* Meta data for tables
*/
class GdaJMetaTables extends GdaJMetaResultSet {
protected GdaJMetaTables (GdaJMeta jm) {
super (9, jm);
meta_col_infos.add (new GdaJColumnInfos ("table_catalog", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("table_schema", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("table_name", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("table_type", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("is_insertable_into", null, java.sql.Types.BOOLEAN));
meta_col_infos.add (new GdaJColumnInfos ("table_comments", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("table_short_name", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("table_full_name", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("table_owner", null, java.sql.Types.VARCHAR));
md = jm.md;
}
public GdaJMetaTables (GdaJMeta jm, String catalog, String schema, String name) throws Exception {
this (jm);
rs = md.getTables (catalog, schema, name, null);
}
protected void columnTypesDeclared () {
// the catalog part cannot be NULL, but "" instead
GdaJValue cv = col_values.elementAt (0);
cv.no_null = true;
cv.convert_lc = true;
(col_values.elementAt (1)).convert_lc = true;
(col_values.elementAt (2)).convert_lc = true;
(col_values.elementAt (6)).convert_lc = true;
(col_values.elementAt (7)).convert_lc = true;
}
public boolean fillNextRow (long c_pointer) throws Exception {
if (! rs.next ())
return false;
GdaJValue cv;
cv = col_values.elementAt (0);
cv.setCValue (rs, 0, c_pointer);
cv = col_values.elementAt (1);
cv.setCValue (rs, 1, c_pointer);
cv = col_values.elementAt (2);
cv.setCValue (rs, 2, c_pointer);
cv = col_values.elementAt (3);
cv.setCValue (rs, 3, c_pointer);
cv = col_values.elementAt (5);
cv.setCValue (rs, 4, c_pointer);
String ln = GdaJValue.toLower (rs.getString (2) + "." + rs.getString (3));
if (jm.schemaIsCurrent (rs.getString (2)))
cv.setCString (c_pointer, 6, GdaJValue.toLower (rs.getString (3)));
else
cv.setCString (c_pointer, 6, ln);
cv = col_values.elementAt (7);
cv.setCString (c_pointer, 7, ln);
return true;
}
}
/*
* Meta data for views
*/
class GdaJMetaViews extends GdaJMetaResultSet {
protected GdaJMetaViews (GdaJMeta jm) {
super (6, jm);
meta_col_infos.add (new GdaJColumnInfos ("table_catalog", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("table_schema", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("table_name", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("view_definition", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("check_option", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("is_updatable", null, java.sql.Types.BOOLEAN));
md = jm.md;
}
public GdaJMetaViews (GdaJMeta jm, String catalog, String schema, String name) throws Exception {
this (jm);
rs = jm.md.getTables (catalog, schema, name, new String[]{"VIEW"});
}
protected void columnTypesDeclared () {
// the catalog part cannot be NULL, but "" instead
GdaJValue cv = col_values.elementAt (0);
cv.no_null = true;
cv.convert_lc = true;
(col_values.elementAt (1)).convert_lc = true;
(col_values.elementAt (2)).convert_lc = true;
}
public boolean fillNextRow (long c_pointer) throws Exception {
if (! rs.next ())
return false;
GdaJValue cv;
cv = col_values.elementAt (0);
cv.setCValue (rs, 0, c_pointer);
cv = col_values.elementAt (1);
cv.setCValue (rs, 1, c_pointer);
cv = col_values.elementAt (2);
cv.setCValue (rs, 2, c_pointer);
return true;
}
}
/*
* Meta data for table's columns
*/
class GdaJMetaColumns extends GdaJMetaResultSet {
protected GdaJMetaColumns (GdaJMeta jm) {
super (24, jm);
meta_col_infos.add (new GdaJColumnInfos ("table_catalog", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("table_schema", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("table_name", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("column_name", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("ordinal_position", null, java.sql.Types.INTEGER));
meta_col_infos.add (new GdaJColumnInfos ("column_default", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("is_nullable", null, java.sql.Types.BOOLEAN));
meta_col_infos.add (new GdaJColumnInfos ("data_type", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("array_spec", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("gtype", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("character_maximum_length", null, java.sql.Types.INTEGER));
meta_col_infos.add (new GdaJColumnInfos ("character_octet_length", null, java.sql.Types.INTEGER));
meta_col_infos.add (new GdaJColumnInfos ("numeric_precision", null, java.sql.Types.INTEGER));
meta_col_infos.add (new GdaJColumnInfos ("numeric_scale", null, java.sql.Types.INTEGER));
meta_col_infos.add (new GdaJColumnInfos ("datetime_precision", null, java.sql.Types.INTEGER));
meta_col_infos.add (new GdaJColumnInfos ("character_set_catalog", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("character_set_schema", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("character_set_name", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("collation_catalog", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("collation_schema", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("collation_name", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("extra", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("is_updatable", null, java.sql.Types.VARCHAR));
meta_col_infos.add (new GdaJColumnInfos ("column_comments", null, java.sql.Types.VARCHAR));
md = jm.md;
}
public GdaJMetaColumns (GdaJMeta jm, String catalog, String schema, String tab_name) throws Exception {
this (jm);
rs = jm.md.getColumns (catalog, schema, tab_name, null);
}
protected void columnTypesDeclared () {
// the catalog part cannot be NULL, but "" instead
GdaJValue cv = col_values.elementAt (0);
cv.no_null = true;
cv.convert_lc = true;
(col_values.elementAt (1)).convert_lc = true;
(col_values.elementAt (2)).convert_lc = true;
(col_values.elementAt (3)).convert_lc = true;
(col_values.elementAt (7)).convert_lc = true;
(col_values.elementAt (15)).convert_lc = true;
(col_values.elementAt (16)).convert_lc = true;
(col_values.elementAt (17)).convert_lc = true;
(col_values.elementAt (18)).convert_lc = true;
(col_values.elementAt (19)).convert_lc = true;
(col_values.elementAt (20)).convert_lc = true;
}
public boolean fillNextRow (long c_pointer) throws Exception {
if (! rs.next ())
return false;
GdaJValue cv;
int i;
(col_values.elementAt (0)).setCValue (rs, 0, c_pointer);
(col_values.elementAt (1)).setCValue (rs, 1, c_pointer);
(col_values.elementAt (2)).setCValue (rs, 2, c_pointer);
(col_values.elementAt (3)).setCValue (rs, 3, c_pointer);
(col_values.elementAt (4)).setCValue (rs, 16, c_pointer);
(col_values.elementAt (5)).setCValue (rs, 12, c_pointer);
cv = col_values.elementAt (6);
i = rs.getInt (10);
if (i == DatabaseMetaData.columnNoNulls)
cv.setCBoolean (c_pointer, 6, false);
else
cv.setCBoolean (c_pointer, 6, true);
(col_values.elementAt (7)).setCValue (rs, 5, c_pointer);
(col_values.elementAt (9)).setCString (c_pointer, 9,
GdaJValue.jdbc_type_to_g_type (rs.getInt (5))); // gtype
(col_values.elementAt (11)).setCValue (rs, 15, c_pointer);
(col_values.elementAt (12)).setCValue (rs, 8, c_pointer); // numeric_precision
(col_values.elementAt (23)).setCValue (rs, 11, c_pointer); // comments
return true;
}
}
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