firebirdmodelreader.java

OBPM是一个开源

     */
    protected Collection readForeignKeys(DatabaseMetaDataWrapper metaData, String tableName) throws SQLException
    {
        Map       fks    = new ListOrderedMap();
        ResultSet fkData = null;

        try
        {
            if (getPlatform().isDelimitedIdentifierModeOn())
        	{
        		// Jaybird has a problem when delimited identifiers are used as
        		// it is not able to find the foreign key info for the table
        		// So we have to filter manually below
	            fkData = metaData.getForeignKeys(getDefaultTablePattern());
	            while (fkData.next())
	            {
	                Map values = readColumns(fkData, getColumnsForFK());
	
                    if (tableName.equals(values.get("FKTABLE_NAME")))
                    {
                    	readForeignKey(metaData, values, fks);
                    }
	            }
        	}
            else
            {
	            fkData = metaData.getForeignKeys(tableName);
	            while (fkData.next())
	            {
	                Map values = readColumns(fkData, getColumnsForFK());
	
	                readForeignKey(metaData, values, fks);
	            }
            }
        }
        finally
        {
            if (fkData != null)
            {
                fkData.close();
            }
        }
        return fks.values();
    }

    /**
     * {@inheritDoc}
     */
    protected Collection readIndices(DatabaseMetaDataWrapper metaData, String tableName) throws SQLException
    {
        // Jaybird is not able to read indices when delimited identifiers are turned on,
        // so we gather the data manually using Firebird's system tables
        Map          indices = new ListOrderedMap();
        StringBuffer query   = new StringBuffer();
        
        query.append("SELECT a.RDB$INDEX_NAME INDEX_NAME, b.RDB$RELATION_NAME TABLE_NAME, b.RDB$UNIQUE_FLAG NON_UNIQUE,");
        query.append(" a.RDB$FIELD_POSITION ORDINAL_POSITION, a.RDB$FIELD_NAME COLUMN_NAME, 3 INDEX_TYPE");
        query.append(" FROM RDB$INDEX_SEGMENTS a, RDB$INDICES b WHERE a.RDB$INDEX_NAME=b.RDB$INDEX_NAME AND b.RDB$RELATION_NAME = ?");

        PreparedStatement stmt      = getConnection().prepareStatement(query.toString());
        ResultSet         indexData = null;

        stmt.setString(1, getPlatform().isDelimitedIdentifierModeOn() ? tableName : tableName.toUpperCase());

        try 
        {
        	indexData = stmt.executeQuery();

            while (indexData.next())
            {
                Map values = readColumns(indexData, getColumnsForIndex());

                // we have to reverse the meaning of the unique flag
                values.put("NON_UNIQUE", Boolean.FALSE.equals(values.get("NON_UNIQUE")) ? Boolean.TRUE : Boolean.FALSE);
                // and trim the names
                values.put("INDEX_NAME",  ((String)values.get("INDEX_NAME")).trim());
                values.put("TABLE_NAME",  ((String)values.get("TABLE_NAME")).trim());
                values.put("COLUMN_NAME", ((String)values.get("COLUMN_NAME")).trim());
                readIndex(metaData, values, indices);
            }
        }
        finally
        {
            if (indexData != null)
            {
                indexData.close();
            }
        }
        return indices.values();
    }

    /**
     * {@inheritDoc}
     */
    protected boolean isInternalPrimaryKeyIndex(DatabaseMetaDataWrapper metaData, Table table, Index index) throws SQLException
    {
        String       tableName = getPlatform().getSqlBuilder().getTableName(table);
        String       indexName = getPlatform().getSqlBuilder().getIndexName(index);
        StringBuffer query     = new StringBuffer();

        query.append("SELECT RDB$CONSTRAINT_NAME FROM RDB$RELATION_CONSTRAINTS where RDB$RELATION_NAME=? AND RDB$CONSTRAINT_TYPE=? AND RDB$INDEX_NAME=?");

        PreparedStatement stmt = getConnection().prepareStatement(query.toString());

        try 
        {
            stmt.setString(1, getPlatform().isDelimitedIdentifierModeOn() ? tableName : tableName.toUpperCase());
            stmt.setString(2, "PRIMARY KEY");
            stmt.setString(3, indexName);

            ResultSet resultSet = stmt.executeQuery();

            return resultSet.next();
        }
        finally
        {
            if (stmt != null)
            {
                stmt.close();
            }
        }
    }

    /**
     * {@inheritDoc}
     */
    protected boolean isInternalForeignKeyIndex(DatabaseMetaDataWrapper metaData, Table table, ForeignKey fk, Index index) throws SQLException
    {
        String       tableName = getPlatform().getSqlBuilder().getTableName(table);
        String       indexName = getPlatform().getSqlBuilder().getIndexName(index);
        String       fkName    = getPlatform().getSqlBuilder().getForeignKeyName(table, fk);
        StringBuffer query     = new StringBuffer();

        query.append("SELECT RDB$CONSTRAINT_NAME FROM RDB$RELATION_CONSTRAINTS where RDB$RELATION_NAME=? AND RDB$CONSTRAINT_TYPE=? AND RDB$CONSTRAINT_NAME=? AND RDB$INDEX_NAME=?");

        PreparedStatement stmt = getConnection().prepareStatement(query.toString());

        try 
        {
            stmt.setString(1, getPlatform().isDelimitedIdentifierModeOn() ? tableName : tableName.toUpperCase());
            stmt.setString(2, "FOREIGN KEY");
            stmt.setString(3, fkName);
            stmt.setString(4, indexName);

            ResultSet resultSet = stmt.executeQuery();

            return resultSet.next();
        }
        finally
        {
            if (stmt != null)
            {
                stmt.close();
            }
        }
    }

    /**
     * {@inheritDoc}
     */
    public String determineSchemaOf(Connection connection, String schemaPattern, Table table) throws SQLException
    {
        ResultSet tableData  = null;
        ResultSet columnData = null;

        try
        {
            DatabaseMetaDataWrapper metaData = new DatabaseMetaDataWrapper();

            metaData.setMetaData(connection.getMetaData());
            metaData.setCatalog(getDefaultCatalogPattern());
            metaData.setSchemaPattern(schemaPattern == null ? getDefaultSchemaPattern() : schemaPattern);
            metaData.setTableTypes(getDefaultTableTypes());

            String tablePattern = table.getName();

            if (getPlatform().isDelimitedIdentifierModeOn())
            {
                tablePattern = tablePattern.toUpperCase();
            }

            tableData = metaData.getTables(tablePattern);

            boolean found  = false;
            String  schema = null;

            while (!found && tableData.next())
            {
                Map    values    = readColumns(tableData, getColumnsForTable());
                String tableName = (String)values.get("TABLE_NAME");

                if ((tableName != null) && (tableName.length() > 0))
                {
                    schema = (String)values.get("TABLE_SCHEM");
                    found  = true;

                    if (getPlatform().isDelimitedIdentifierModeOn())
                    {
                        // Jaybird has a problem when delimited identifiers are used as
                        // it is not able to find the columns for the table
                        // So we have to filter manually below
                        columnData = metaData.getColumns(getDefaultTablePattern(), getDefaultColumnPattern());
                    }
                    else
                    {
                        columnData = metaData.getColumns(tableName, getDefaultColumnPattern());
                    }

                    while (found && columnData.next())
                    {
                        values = readColumns(columnData, getColumnsForColumn());

                        if (getPlatform().isDelimitedIdentifierModeOn() &&
                            !tableName.equals(values.get("TABLE_NAME")))
                        {
                            continue;
                        }

                        if (table.findColumn((String)values.get("COLUMN_NAME"),
                                             getPlatform().isDelimitedIdentifierModeOn()) == null)
                        {
                            found = false;
                        }
                    }
                    columnData.close();
                    columnData = null;
                }
            }
            return found ? schema : null;
        }
        finally
        {
            if (columnData != null)
            {
                columnData.close();
            }
            if (tableData != null)
            {
                tableData.close();
            }
        }
    }
}