(Unique) constraint for TableDefinition is generated

src/main/java/de/kreth/dbmanager/DbManager.java

@@ -129,7 +129,12 @@ public class DbManager {
 				sql.append(" ").append(col.getColumnParameters());
 			}
 		}
+		for(UniqueConstraint uni: def.getUnique()) {
 
+			sql.append(",\n\tCONSTRAINT UNIQUE (");
+			sql.append(String.join(",", uni.getNames()));
+			sql.append(")");
+		}
 		sql.append("\n");
 		sql.append(")");
 		return sql.toString();

src/main/java/de/kreth/dbmanager/TableDefinition.java

@@ -1,6 +1,7 @@
 package de.kreth.dbmanager;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
@@ -16,17 +17,18 @@ import java.util.stream.Collectors;
  */
 public class TableDefinition {
 	public static final String COLUMN_ID_NAME = "_id";
-	private String tableName;
-	private Collection<ColumnDefinition> columns;
+	private final String tableName;
+	private final Collection<ColumnDefinition> columns;
+	private Collection<UniqueConstraint> unique;
 
-	public TableDefinition(String tableName, Collection<ColumnDefinition> columns) {
-		super();
+	public TableDefinition(String tableName, List<ColumnDefinition> columns, UniqueConstraint... unique) {
 		this.tableName = tableName;
 		ColumnDefinition id = new ColumnDefinition(DataType.INTEGER, COLUMN_ID_NAME, "primary key AUTO_INCREMENT");
 		List<ColumnDefinition> def = new ArrayList<ColumnDefinition>();
 		def.add(id);
 		def.addAll(columns);
 		this.columns = Collections.unmodifiableCollection(def);
+		this.unique = Collections.unmodifiableCollection(Arrays.asList(unique));
 	}
 
 	public String getTableName() {
@@ -37,6 +39,10 @@ public class TableDefinition {
 		return columns;
 	}
 
+	public Collection<UniqueConstraint> getUnique() {
+		return unique;
+	}
+	
 	@Override
 	public String toString() {
 		return tableName + "[" + String.join(",", columns.stream().map(m -> m.toString()).collect(Collectors.toList())) + "]";

src/main/java/de/kreth/dbmanager/UniqueConstraint.java

@@ -0,0 +1,19 @@
+package de.kreth.dbmanager;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class UniqueConstraint {
+	private List<String> names = new ArrayList<>();
+	
+	public UniqueConstraint(ColumnDefinition... defs) {
+		for(ColumnDefinition c: defs) {
+			names.add(c.getColumnName());
+		}
+	}
+	
+	public List<String> getNames() {
+		return Collections.unmodifiableList(names);
+	}
+}

src/test/java/de/kreth/dbmanager/DbManagerCreateTablesTest.java

@@ -1,28 +1,69 @@
 package de.kreth.dbmanager;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotNull;
-
 import java.util.ArrayList;
 import java.util.List;
 
 import org.junit.Before;
 import org.junit.Test;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+
 public class DbManagerCreateTablesTest {
+    @Test
+    public void testCreateSqlStatement() {
+        List<ColumnDefinition> columns = new ArrayList<ColumnDefinition>();
+        TableDefinition        def     = new TableDefinition("testtable", columns);
+        String                 sql     = DbManager.createSqlStatement(def);
 
-	@Before
-	public void setUp() throws Exception {
+        assertNotNull(sql);
+        assertEquals("CREATE TABLE testtable (\n" + "	_id INTEGER primary key AUTO_INCREMENT\n" + ")", sql);
     }
 
     @Test
-	public void testCreateSqlStatement() {
+    public void testCreateTable2Columns() {
         List<ColumnDefinition> columns = new ArrayList<ColumnDefinition>();
+
+        columns.add(new ColumnDefinition(DataType.VARCHAR100, "name", " NOT NULL"));
+        columns.add(new ColumnDefinition(DataType.DATETIME, "theDate"));
+
         TableDefinition def = new TableDefinition("testtable", columns);
         String          sql = DbManager.createSqlStatement(def);
+
         assertNotNull(sql);
-		System.out.println(sql);
-		assertEquals("CREATE TABLE testtable (\n" + "	_id INTEGER primary key AUTO_INCREMENT\n" + ")", sql);
+        assertEquals("CREATE TABLE testtable (\n"
+        		+ "	_id INTEGER primary key AUTO_INCREMENT,\n"
+        		+ "	name VARCHAR(100)  NOT NULL,\n"
+        		+ "	theDate DATETIME\n" + ")",
+                     sql);
+    }
+
+    @Test
+    public void testCreateTable2ColumnsUnique() {
+        List<ColumnDefinition> columns = new ArrayList<ColumnDefinition>();
+
+        columns.add(new ColumnDefinition(DataType.VARCHAR100, "name", " NOT NULL"));
+        columns.add(new ColumnDefinition(DataType.DATETIME, "theDate"));
+
+        UniqueConstraint unique = new UniqueConstraint(columns.get(0), columns.get(1));
+        TableDefinition def = new TableDefinition("testtable", columns, unique);
+        String          sql = DbManager.createSqlStatement(def);
+
+        assertNotNull(sql);
+
+        String expected = "CREATE TABLE testtable (\n" 
+        		+ "	_id INTEGER primary key AUTO_INCREMENT,\n"
+        		+ "	name VARCHAR(100)  NOT NULL,\n" 
+        		+ "	theDate DATETIME,\n"
+        		+ "	CONSTRAINT UNIQUE (name,theDate)\n"
+        		+ ")";
+
+        assertEquals(expected, sql);
     }
 
+    @Before
+    public void setUp() throws Exception {}
 }
+
+
+//~ Formatted by Jindent --- http://www.jindent.com