implement sql type to DataType conversions specific to access 2016 format

git-svn-id: https://svn.code.sf.net/p/jackcess/code/jackcess/trunk@1132 f203690c-595d-4dc9-a70b-905162fa7fd2

src/main/java/com/healthmarketscience/jackcess/ColumnBuilder.java

@@ -94,7 +94,7 @@ public class ColumnBuilder {
    * Sets the type for the new column based on the given SQL type.
    */
   public ColumnBuilder setSQLType(int type) throws SQLException {
-    return setSQLType(type, 0);
+    return setSQLType(type, 0, null);
   }
   
   /**
@@ -104,7 +104,18 @@ public class ColumnBuilder {
   public ColumnBuilder setSQLType(int type, int lengthInUnits)
     throws SQLException
   {
-    return setType(DataType.fromSQLType(type, lengthInUnits));
+    return setSQLType(type, lengthInUnits, null);
+  }
+
+  /**
+   * Sets the type for the new column based on the given SQL type, target
+   * data length (in type specific units), and target FileFormat.
+   */
+  public ColumnBuilder setSQLType(int type, int lengthInUnits,
+                                  Database.FileFormat fileFormat)
+    throws SQLException
+  {
+    return setType(DataType.fromSQLType(type, lengthInUnits, fileFormat));
   }
 
   /**

src/main/java/com/healthmarketscience/jackcess/DataType.java

@@ -17,14 +17,15 @@ limitations under the License.
 package com.healthmarketscience.jackcess;
 
 import java.io.IOException;
+import java.math.BigDecimal;
+import java.math.BigInteger;
 import java.sql.SQLException;
 import java.sql.Types;
+import java.util.Date;
 import java.util.HashMap;
 import java.util.Map;
-import java.util.Date;
-import java.math.BigDecimal;
-import java.math.BigInteger;
 
+import com.healthmarketscience.jackcess.impl.DatabaseImpl;
 import com.healthmarketscience.jackcess.impl.JetFormat;
 
 /**
@@ -157,7 +158,7 @@ public enum DataType {
    * String and parsed as Double, or {@code null}.  Equivalent to SQL
    * {@link Types#BIGINT}.
    */
-  BIG_INT((byte) 0x13, null, 8),
+  BIG_INT((byte) 0x13, Types.BIGINT, 8),
   /**
    * Dummy type for a fixed length type which is not currently supported.
    * Handled like a fixed length {@link #BINARY}.
@@ -171,26 +172,26 @@ public enum DataType {
       1);
 
   /** Map of SQL types to Access data types */
-  private static final Map<Integer, DataType> SQL_TYPES =
-    new HashMap<Integer, DataType>();
+  private static final Map<Integer, DataType[]> SQL_TYPES =
+    new HashMap<Integer, DataType[]>();
   /** Alternate map of SQL types to Access data types */
   private static final Map<Integer, DataType> ALT_SQL_TYPES =
     new HashMap<Integer, DataType>();
   static {
     for (DataType type : DataType.values()) {
       if (type._sqlType != null) {
-        SQL_TYPES.put(type._sqlType, type);
+        SQL_TYPES.put(type._sqlType, new DataType[]{type});
       }
     }
-    SQL_TYPES.put(Types.BIT, BYTE);
-    SQL_TYPES.put(Types.BLOB, OLE);
-    SQL_TYPES.put(Types.CLOB, MEMO);
-    SQL_TYPES.put(Types.BIGINT, LONG);
-    SQL_TYPES.put(Types.CHAR, TEXT);
-    SQL_TYPES.put(Types.DATE, SHORT_DATE_TIME);
-    SQL_TYPES.put(Types.REAL, DOUBLE);
-    SQL_TYPES.put(Types.TIME, SHORT_DATE_TIME);
-    SQL_TYPES.put(Types.VARBINARY, BINARY);
+    SQL_TYPES.put(Types.BIT, new DataType[]{BYTE});
+    SQL_TYPES.put(Types.BLOB, new DataType[]{OLE});
+    SQL_TYPES.put(Types.CLOB, new DataType[]{MEMO});
+    SQL_TYPES.put(Types.BIGINT, new DataType[]{LONG, BIG_INT});
+    SQL_TYPES.put(Types.CHAR, new DataType[]{TEXT});
+    SQL_TYPES.put(Types.DATE, new DataType[]{SHORT_DATE_TIME});
+    SQL_TYPES.put(Types.REAL, new DataType[]{DOUBLE});
+    SQL_TYPES.put(Types.TIME, new DataType[]{SHORT_DATE_TIME});
+    SQL_TYPES.put(Types.VARBINARY, new DataType[]{BINARY});
 
     // the "alternate" types allow for larger values
     ALT_SQL_TYPES.put(Types.VARCHAR, MEMO);
@@ -458,16 +459,38 @@ public enum DataType {
   public static DataType fromSQLType(int sqlType)
     throws SQLException
   {
-    return fromSQLType(sqlType, 0);
+    return fromSQLType(sqlType, 0, null);
   }
   
   public static DataType fromSQLType(int sqlType, int lengthInUnits)
     throws SQLException
   {
-    DataType rtn = SQL_TYPES.get(sqlType);
-    if(rtn == null) {
+    return fromSQLType(sqlType, lengthInUnits, null);
+  }
+
+  public static DataType fromSQLType(int sqlType, int lengthInUnits,
+                                     Database.FileFormat fileFormat)
+    throws SQLException
+  {
+    DataType[] rtnArr = SQL_TYPES.get(sqlType);
+    if(rtnArr == null) {
       throw new SQLException("Unsupported SQL type: " + sqlType);
     }
+    DataType rtn = rtnArr[0];
+    if((rtnArr.length > 1) && (fileFormat != null)) {
+      // there are multiple possibilities, ordered from lowest version to
+      // highest version supported.  go in opposite order to find the best
+      // type for this format
+      JetFormat format = DatabaseImpl.getFileFormatDetails(fileFormat)
+        .getFormat();
+      for(int i = rtnArr.length - 1; i >= 0; --i) {
+        DataType tmp = rtnArr[i];
+        if(format.isSupportedDataType(tmp)) {
+          rtn = tmp;
+          break;
+        }
+      }
+    }
 
     // make sure size is reasonable
     int size = lengthInUnits * rtn.getUnitSize();
@@ -495,7 +518,7 @@ public enum DataType {
     try {
       java.lang.reflect.Field sqlTypeField = Types.class.getField(typeName);
       Integer value = (Integer)sqlTypeField.get(null);
-      SQL_TYPES.put(value, type);
+      SQL_TYPES.put(value, new DataType[]{type});
       if(altType != null) {
         ALT_SQL_TYPES.put(value, altType);
       }

src/test/java/com/healthmarketscience/jackcess/impl/JetFormatTest.java

@@ -5,11 +5,13 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.nio.channels.FileChannel;
 import java.nio.channels.NonWritableChannelException;
+import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.EnumSet;
 import java.util.List;
 import java.util.Set;
 
+import com.healthmarketscience.jackcess.DataType;
 import com.healthmarketscience.jackcess.Database;
 import static com.healthmarketscience.jackcess.Database.*;
 import com.healthmarketscience.jackcess.DatabaseBuilder;
@@ -265,6 +267,30 @@ public class JetFormatTest extends TestCase {
     }
   }
 
+  public void testSqlTypes() throws Exception {
+    
+    JetFormat v2000 = JetFormat.VERSION_4;
+    for(DataType dt : DataType.values()) {
+      if(v2000.isSupportedDataType(dt)) {
+        Integer sqlType = null;
+        try {
+          sqlType = dt.getSQLType();
+        } catch(SQLException ignored) {}
+
+        if(sqlType != null) {
+          assertEquals(dt, DataType.fromSQLType(sqlType));
+        }
+      }
+    }
+
+    assertEquals(DataType.LONG, DataType.fromSQLType(java.sql.Types.BIGINT));
+    assertEquals(DataType.BIG_INT, DataType.fromSQLType(
+                     java.sql.Types.BIGINT, 0, Database.FileFormat.V2016));
+    assertEquals(java.sql.Types.BIGINT, DataType.BIG_INT.getSQLType());
+    assertEquals(DataType.MEMO, DataType.fromSQLType(
+                     java.sql.Types.VARCHAR, 1000));
+  }
+
   public static void transferDbFrom(FileChannel channel, InputStream in)
     throws IOException
   {