Initial version

git-svn-id: https://svn.code.sf.net/p/jackcess/code/jackcess/trunk@9 f203690c-595d-4dc9-a70b-905162fa7fd2

diff --git a/src/java/com/healthmarketscience/jackcess/DataType.java b/src/java/com/healthmarketscience/jackcess/DataType.java
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+++ b/src/java/com/healthmarketscience/jackcess/DataType.java
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+/*
+Copyright (c) 2005 Health Market Science, Inc.
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library 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
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
+USA
+
+You can contact Health Market Science at info@healthmarketscience.com
+or at the following address:
+
+Health Market Science
+2700 Horizon Drive
+Suite 200
+King of Prussia, PA 19406
+*/
+
+package com.healthmarketscience.jackcess;
+
+import java.sql.SQLException;
+import java.sql.Types;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Access data type
+ * @author Tim McCune
+ */
+public enum DataType {
+  
+  BOOLEAN((byte) 0x01, Types.BOOLEAN, 0),
+  BYTE((byte) 0x02, Types.TINYINT, 1),
+  INT((byte) 0x03, Types.SMALLINT, 2),
+  LONG((byte) 0x04, Types.INTEGER, 4),
+  MONEY((byte) 0x05, Types.DECIMAL, 8),
+  FLOAT((byte) 0x06, Types.FLOAT, 4),
+  DOUBLE((byte) 0x07, Types.DOUBLE, 8),
+  SHORT_DATE_TIME((byte) 0x08, Types.TIMESTAMP, 8),
+  BINARY((byte) 0x09, Types.BINARY, 255, true),
+  TEXT((byte) 0x0A, Types.VARCHAR, 50 * 2, true),
+  OLE((byte) 0x0B, Types.LONGVARBINARY, 12),
+  MEMO((byte) 0x0C, Types.LONGVARCHAR, 12),
+  UNKNOWN_0D((byte) 0x0D),
+  GUID((byte) 0x0F),
+  NUMERIC((byte) 0x10);
+
+  /** Map of SQL types to Access data types */
+  private static Map<Integer, DataType> SQL_TYPES = new HashMap<Integer, DataType>();
+  static {
+    for (DataType type : DataType.values()) {
+      if (type._sqlType != null) {
+        SQL_TYPES.put(type._sqlType, type);
+      }
+    }
+  }
+  
+  private static Map<Byte, DataType> DATA_TYPES = new HashMap<Byte, DataType>();
+  static {
+    for (DataType type : DataType.values()) {
+      DATA_TYPES.put(type._value, type);
+    }
+  }
+  
+  private boolean _variableLength = false;
+  /** Internal Access value */
+  private byte _value;
+  /** Size in bytes */
+  private Integer _size;
+  /** SQL type equivalent, or null if none defined */
+  private Integer _sqlType;
+  
+  DataType(byte value) {
+    _value = value;
+  }
+  
+  DataType(byte value, int sqlType, int size) {
+    this(value);
+    _sqlType = sqlType;
+    _size = size;
+  }
+  
+  DataType(byte value, int sqlType, int size, boolean variableLength) {
+    this(value, sqlType, size);
+    _variableLength = variableLength;
+  }
+  
+  public byte getValue() {
+    return _value;
+  }
+  
+  public boolean isVariableLength() {
+    return _variableLength;
+  }
+  
+  public int getSize() {
+    if (_size != null) {
+      return _size;
+    } else {
+      throw new IllegalArgumentException("FIX ME");
+    }
+  }
+  
+  public int getSQLType() throws SQLException {
+    if (_sqlType != null) {
+      return _sqlType;
+    } else {
+      throw new SQLException("Unsupported data type: " + toString());
+    }
+  }
+  
+  public static DataType fromByte(byte b) throws SQLException {
+    DataType rtn = DATA_TYPES.get(b);
+    if (rtn != null) {
+      return rtn;
+    } else {
+      throw new SQLException("Unrecognized data type: " + b);
+    }
+  }
+  
+  public static DataType fromSQLType(int sqlType) throws SQLException {
+    DataType rtn = SQL_TYPES.get(sqlType);
+    if (rtn != null) {
+      return rtn;
+    } else {
+      throw new SQLException("Unsupported SQL type: " + sqlType);
+    }
+  }
+  
+}