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MSSQLRubyJdbcConnection.java
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MSSQLRubyJdbcConnection.java
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/*
**** BEGIN LICENSE BLOCK *****
* Copyright (c) 2006-2010 Nick Sieger <nick@nicksieger.com>
* Copyright (c) 2006-2007 Ola Bini <ola.bini@gmail.com>
* Copyright (c) 2008-2009 Thomas E Enebo <enebo@acm.org>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
***** END LICENSE BLOCK *****/
package arjdbc.mssql;
import arjdbc.jdbc.RubyJdbcConnection;
import java.sql.DatabaseMetaData;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.List;
import java.util.ArrayList;
import org.jruby.Ruby;
import org.jruby.RubyArray;
import org.jruby.RubyClass;
import org.jruby.RubyString;
import org.jruby.runtime.ObjectAllocator;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
/**
*
* @author nicksieger
*/
public class MSSQLRubyJdbcConnection extends RubyJdbcConnection {
private RubyString _row_num;
protected MSSQLRubyJdbcConnection(Ruby runtime, RubyClass metaClass) {
super(runtime, metaClass);
_row_num = runtime.newString("_row_num");
}
public static RubyClass createMSSQLJdbcConnectionClass(Ruby runtime, RubyClass jdbcConnection) {
final RubyClass clazz = getConnectionAdapters(runtime). // ActiveRecord::ConnectionAdapters
defineClassUnder("MSSQLJdbcConnection", jdbcConnection, MSSQL_JDBCCONNECTION_ALLOCATOR);
clazz.defineAnnotatedMethods(MSSQLRubyJdbcConnection.class);
getConnectionAdapters(runtime).setConstant("MssqlJdbcConnection", clazz); // backwards-compat
return clazz;
}
private static ObjectAllocator MSSQL_JDBCCONNECTION_ALLOCATOR = new ObjectAllocator() {
public IRubyObject allocate(Ruby runtime, RubyClass klass) {
return new MSSQLRubyJdbcConnection(runtime, klass);
}
};
/**
* Treat LONGVARCHAR as CLOB on MSSQL for purposes of converting a JDBC value to Ruby.
* Treat BOOLEAN/BIT as Boolean, rather than the default behaviour of conversion to string
*/
@Override
protected IRubyObject jdbcToRuby(Ruby runtime, int column, int type, ResultSet resultSet)
throws SQLException {
if ( Types.BOOLEAN == type || Types.BIT == type ) {
return booleanToRuby(runtime, resultSet, resultSet.getBoolean(column));
}
if ( type == Types.LONGVARCHAR ) type = Types.CLOB;
return super.jdbcToRuby(runtime, column, type, resultSet);
}
protected static IRubyObject booleanToRuby(
final Ruby runtime, final ResultSet resultSet, final boolean value)
throws SQLException {
if ( value == false && resultSet.wasNull() ) return runtime.getNil();
return runtime.newBoolean(value);
}
/**
* Microsoft SQL 2000+ support schemas
*/
@Override
protected boolean databaseSupportsSchemas() {
return true;
}
@Override
protected void populateFromResultSet(ThreadContext context, Ruby runtime, List results,
ResultSet resultSet, ColumnData[] columns) throws SQLException {
super.populateFromResultSet(context, runtime, results, resultSet, filterRowNumFromColumns(columns));
}
/**
* Filter out the <tt>_row_num</tt> column from results.
*/
private ColumnData[] filterRowNumFromColumns(ColumnData[] columns) {
for (int i = 0; i < columns.length; i++) {
if (columns[i].name.equals(_row_num)) {
ColumnData[] filtered = new ColumnData[columns.length - 1];
if (i > 0) {
System.arraycopy(columns, 0, filtered, 0, i);
}
if (i + 1 < columns.length) {
System.arraycopy(columns, i + 1, filtered, i, columns.length - (i + 1));
}
return filtered;
}
}
return columns;
}
@Override
protected RubyArray mapTables(final Ruby runtime, final DatabaseMetaData metaData,
final String catalog, final String schemaPattern, final String tablePattern,
final ResultSet tablesSet) throws SQLException {
final List<RubyString> tables = new ArrayList<RubyString>(32);
while ( tablesSet.next() ) {
String name = tablesSet.getString(TABLES_TABLE_NAME);
name = caseConvertIdentifierForRails(metaData, name);
String schema = tablesSet.getString(TABLES_TABLE_SCHEM);
if ( schema != null ) schema = schema.toLowerCase();
// Under MS-SQL, don't return system tables/views unless explicitly asked for :
if ( schemaPattern == null &&
( "sys".equals(schema) || "information_schema".equals(schema) ) ) {
continue;
}
tables.add(RubyString.newUnicodeString(runtime, name));
}
return runtime.newArray((List) tables);
}
}