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/*-------------------------------------------------------------------------
*
* Copyright (c) 2005, PostgreSQL Global Development Group
*
* IDENTIFICATION
* $PostgreSQL: pgjdbc/org/postgresql/jdbc3/PSQLParameterMetaData.java,v 1.2 2005/04/10 21:54:16 jurka Exp $
*
*-------------------------------------------------------------------------
*/
package org.postgresql.jdbc3;
import java.sql.SQLException;
import java.sql.ParameterMetaData;
import org.postgresql.util.GT;
import org.postgresql.util.PSQLState;
import org.postgresql.util.PSQLException;
import org.postgresql.core.BaseConnection;
public class PSQLParameterMetaData implements ParameterMetaData {
private final BaseConnection _connection;
private final int _oids[];
public PSQLParameterMetaData(BaseConnection connection, int oids[]) {
_connection = connection;
_oids = oids;
}
public String getParameterClassName(int param) throws SQLException {
checkParamIndex(param);
return _connection.getJavaClass(_oids[param-1]);
}
public int getParameterCount() {
return _oids.length;
}
// For now report all parameters as inputs. CallableStatements may
// have one output, but ignore that for now.
public int getParameterMode(int param) throws SQLException {
checkParamIndex(param);
return ParameterMetaData.parameterModeIn;
}
public int getParameterType(int param) throws SQLException {
checkParamIndex(param);
return _connection.getSQLType(_oids[param-1]);
}
public String getParameterTypeName(int param) throws SQLException {
checkParamIndex(param);
return _connection.getPGType(_oids[param-1]);
}
// we don't know this
public int getPrecision(int param) throws SQLException {
checkParamIndex(param);
return 0;
}
// we don't know this
public int getScale(int param) throws SQLException {
checkParamIndex(param);
return 0;
}
// we can't tell anything about nullability
public int isNullable(int param) throws SQLException {
checkParamIndex(param);
return ParameterMetaData.parameterNullableUnknown;
}
// pg doesn't have unsigned numbers
public boolean isSigned(int param) throws SQLException {
checkParamIndex(param);
return true;
}
private void checkParamIndex(int param) throws PSQLException {
if (param < 1 || param > _oids.length)
throw new PSQLException(GT.tr("The parameter index is out of range: {0}, number of parameters: {1}.", new Object[]{new Integer(param), new Integer(_oids.length)}), PSQLState.INVALID_PARAMETER_VALUE);
}
}
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