ByteArrayRow.java

/*
 Copyright  2007 MySQL AB, 2008 Sun Microsystems
 All rights reserved. Use is subject to license terms.

  The MySQL Connector/J is licensed under the terms of the GPL,
  like most MySQL Connectors. There are special exceptions to the
  terms and conditions of the GPL as it is applied to this software,
  see the FLOSS License Exception available on mysql.com.

  This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License as
  published by the Free Software Foundation; version 2 of the
  License.

  This program is distributed in the hope that it will be useful,  
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  02110-1301 USA
 
 */
package com.mysql.jdbc;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.UnsupportedEncodingException;
import java.sql.Date;
import java.sql.SQLException;
import java.sql.Time;
import java.sql.Timestamp;
import java.util.Calendar;
import java.util.TimeZone;

/**
 * A RowHolder implementation that is for cached results (a-la
 * mysql_store_result()).
 * 
 * @version $Id: $
 */
public class ByteArrayRow extends ResultSetRow {

	byte[][] internalRowData;

	public ByteArrayRow(byte[][] internalRowData, ExceptionInterceptor exceptionInterceptor) {
		super(exceptionInterceptor);
		
		this.internalRowData = internalRowData;
	}

	public byte[] getColumnValue(int index) throws SQLException {
		return this.internalRowData[index];
	}

	public void setColumnValue(int index, byte[] value) throws SQLException {
		this.internalRowData[index] = value;
	}

	public String getString(int index, String encoding, ConnectionImpl conn)
			throws SQLException {
		byte[] columnData = this.internalRowData[index];

		if (columnData == null) {
			return null;
		}

		return getString(encoding, conn, columnData, 0, columnData.length);
	}

	public boolean isNull(int index) throws SQLException {
		return this.internalRowData[index] == null;
	}

	public boolean isFloatingPointNumber(int index) throws SQLException {
		byte[] numAsBytes = this.internalRowData[index];

		if (this.internalRowData[index] == null
				|| this.internalRowData[index].length == 0) {
			return false;
		}

		for (int i = 0; i < numAsBytes.length; i++) {
			if (((char) numAsBytes[i] == 'e') || ((char) numAsBytes[i] == 'E')) {
				return true;
			}
		}

		return false;
	}

	public long length(int index) throws SQLException {
		if (this.internalRowData[index] == null) {
			return 0;
		}

		return this.internalRowData[index].length;
	}

	public int getInt(int columnIndex) {
		if (this.internalRowData[columnIndex] == null) {
			return 0;
		}

		return StringUtils.getInt(this.internalRowData[columnIndex]);
	}

	public long getLong(int columnIndex) {
		if (this.internalRowData[columnIndex] == null) {
			return 0;
		}

		return StringUtils.getLong(this.internalRowData[columnIndex]);
	}

	public Timestamp getTimestampFast(int columnIndex, Calendar targetCalendar,
			TimeZone tz, boolean rollForward, ConnectionImpl conn,
			ResultSetImpl rs) throws SQLException {
		byte[] columnValue = this.internalRowData[columnIndex];

		if (columnValue == null) {
			return null;
		}

		return getTimestampFast(columnIndex, this.internalRowData[columnIndex],
				0, columnValue.length, targetCalendar, tz, rollForward, conn,
				rs);
	}

	public double getNativeDouble(int columnIndex) throws SQLException {
		if (this.internalRowData[columnIndex] == null) {
			return 0;
		}

		return getNativeDouble(this.internalRowData[columnIndex], 0);
	}

	public float getNativeFloat(int columnIndex) throws SQLException {
		if (this.internalRowData[columnIndex] == null) {
			return 0;
		}

		return getNativeFloat(this.internalRowData[columnIndex], 0);
	}

	public int getNativeInt(int columnIndex) throws SQLException {
		if (this.internalRowData[columnIndex] == null) {
			return 0;
		}

		return getNativeInt(this.internalRowData[columnIndex], 0);
	}

	public long getNativeLong(int columnIndex) throws SQLException {
		if (this.internalRowData[columnIndex] == null) {
			return 0;
		}

		return getNativeLong(this.internalRowData[columnIndex], 0);
	}

	public short getNativeShort(int columnIndex) throws SQLException {
		if (this.internalRowData[columnIndex] == null) {
			return 0;
		}

		return getNativeShort(this.internalRowData[columnIndex], 0);
	}

	public Timestamp getNativeTimestamp(int columnIndex,
			Calendar targetCalendar, TimeZone tz, boolean rollForward,
			ConnectionImpl conn, ResultSetImpl rs) throws SQLException {
		byte[] bits = this.internalRowData[columnIndex];

		if (bits == null) {
			return null;
		}

		return getNativeTimestamp(bits, 0, bits.length, targetCalendar, tz,
				rollForward, conn, rs);
	}

	public void closeOpenStreams() {
		// no-op for this type
	}

	public InputStream getBinaryInputStream(int columnIndex)
			throws SQLException {
		if (this.internalRowData[columnIndex] == null) {
			return null;
		}

		return new ByteArrayInputStream(this.internalRowData[columnIndex]);
	}

	public Reader getReader(int columnIndex) throws SQLException {
		InputStream stream = getBinaryInputStream(columnIndex);

		if (stream == null) {
			return null;
		}

		try {
			return new InputStreamReader(stream, this.metadata[columnIndex]
					.getCharacterSet());
		} catch (UnsupportedEncodingException e) {
			SQLException sqlEx = SQLError.createSQLException("", this.exceptionInterceptor);

			sqlEx.initCause(e);

			throw sqlEx;
		}
	}

	public Time getTimeFast(int columnIndex, Calendar targetCalendar,
			TimeZone tz, boolean rollForward, ConnectionImpl conn,
			ResultSetImpl rs) throws SQLException {
		byte[] columnValue = this.internalRowData[columnIndex];

		if (columnValue == null) {
			return null;
		}

		return getTimeFast(columnIndex, this.internalRowData[columnIndex], 0,
				columnValue.length, targetCalendar, tz, rollForward, conn, rs);
	}

	public Date getDateFast(int columnIndex, ConnectionImpl conn,
			ResultSetImpl rs, Calendar targetCalendar) throws SQLException {
		byte[] columnValue = this.internalRowData[columnIndex];

		if (columnValue == null) {
			return null;
		}

		return getDateFast(columnIndex, this.internalRowData[columnIndex], 0,
				columnValue.length, conn, rs, targetCalendar);
	}

	public Object getNativeDateTimeValue(int columnIndex, Calendar targetCalendar,
			int jdbcType, int mysqlType, TimeZone tz,
			boolean rollForward, ConnectionImpl conn, ResultSetImpl rs)
			throws SQLException {
		byte[] columnValue = this.internalRowData[columnIndex];

		if (columnValue == null) {
			return null;
		}

		return getNativeDateTimeValue(columnIndex, columnValue, 0,
				columnValue.length, targetCalendar, jdbcType, mysqlType, tz,
				rollForward, conn, rs);
	}

	public Date getNativeDate(int columnIndex, ConnectionImpl conn,
			ResultSetImpl rs, Calendar cal) throws SQLException {
		byte[] columnValue = this.internalRowData[columnIndex];

		if (columnValue == null) {
			return null;
		}

		return getNativeDate(columnIndex, columnValue, 0, columnValue.length,
				conn, rs, cal);
	}

	public Time getNativeTime(int columnIndex, Calendar targetCalendar,
			TimeZone tz, boolean rollForward, ConnectionImpl conn,
			ResultSetImpl rs) throws SQLException {
		byte[] columnValue = this.internalRowData[columnIndex];

		if (columnValue == null) {
			return null;
		}

		return getNativeTime(columnIndex, columnValue, 0, columnValue.length,
				targetCalendar, tz, rollForward, conn, rs);
	}

	public int getBytesSize() {
		if (internalRowData == null) {
			return 0;
		}
		
		int bytesSize = 0;
		
		for (int i = 0; i < internalRowData.length; i++) {
			if (internalRowData[i] != null) {
				bytesSize += internalRowData[i].length;
			}
		}
		
		return bytesSize;
	}
}