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/*

   Derby - Class com.pivotal.gemfirexd.internal.client.am.ParameterMetaData

   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
   the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

*/

/*
 * Changes for GemFireXD distributed data platform (some marked by "GemStone changes")
 *
 * Portions Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you
 * may not use this file except in compliance with the License. You
 * may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * permissions and limitations under the License. See accompanying
 * LICENSE file.
 */

package com.pivotal.gemfirexd.internal.client.am;

import java.sql.SQLException;

// Parameter meta data as used internally by the driver is always a column meta data instance.
// We will only create instances of this class when getParameterMetaData() is called.
// This class simply wraps a column meta data instance.
//
// Once we go to JDK 1.4 as runtime pre-req, we can extend ColumnMetaData and new up ParameterMetaData instances directly,
// and we won't have to wrap column meta data instances directly.

// GemStone changes BEGIN
// made abstract to enable compilation with both JDK 1.4 and 1.6
abstract
// GemStone changes END
public class ParameterMetaData implements java.sql.ParameterMetaData {
    ColumnMetaData columnMetaData_;

    public ParameterMetaData(ColumnMetaData columnMetaData) {
        columnMetaData_ = columnMetaData;
    }

    public int getParameterCount() throws SQLException {
        return columnMetaData_.columns_;
    }

    public int getParameterType(int param) throws SQLException {
        return columnMetaData_.getColumnType(param);
    }

    public String getParameterTypeName(int param) throws SQLException {
        return columnMetaData_.getColumnTypeName(param);
    }

    public String getParameterClassName(int param) throws SQLException {
        return columnMetaData_.getColumnClassName(param);
    }

    public int getParameterMode(int param) throws SQLException {
        try
        {
            columnMetaData_.checkForValidColumnIndex(param);
            if (columnMetaData_.sqlxParmmode_[param - 1] == java.sql.ParameterMetaData.parameterModeUnknown) {
                return java.sql.ParameterMetaData.parameterModeUnknown;
            } else if (columnMetaData_.sqlxParmmode_[param - 1] == java.sql.ParameterMetaData.parameterModeIn) {
                return java.sql.ParameterMetaData.parameterModeIn;
            } else if (columnMetaData_.sqlxParmmode_[param - 1] == java.sql.ParameterMetaData.parameterModeOut) {
                return java.sql.ParameterMetaData.parameterModeOut;
            } else {
                return java.sql.ParameterMetaData.parameterModeInOut;
            }
        }
        catch ( SqlException se )
        {
            throw se.getSQLException(columnMetaData_.agent_ /* GemStoneAddition */);
        }
    }

    public int isNullable(int param) throws SQLException {
        return columnMetaData_.isNullable(param);
    }

    public boolean isSigned(int param) throws SQLException {
        return columnMetaData_.isSigned(param);
    }

    public int getPrecision(int param) throws SQLException {
        return columnMetaData_.getPrecision(param);
    }

    public int getScale(int param) throws SQLException {
        return columnMetaData_.getScale(param);
    }
}