Add getType method to different columns

Author: awalter17

src/main/java/net/imagej/table/BoolColumn.java

@@ -61,4 +61,9 @@ public void setHeader(final String header) {
 		this.header = header;
 	}
 
+	@Override
+	public Class<Boolean> getType() {
+		return Boolean.class;
+	}
+
 }

src/main/java/net/imagej/table/ByteColumn.java

@@ -61,4 +61,9 @@ public void setHeader(final String header) {
 		this.header = header;
 	}
 
+	@Override
+	public Class<Byte> getType() {
+		return Byte.class;
+	}
+
 }

src/main/java/net/imagej/table/CharColumn.java

@@ -61,4 +61,9 @@ public void setHeader(final String header) {
 		this.header = header;
 	}
 
+	@Override
+	public Class<Character> getType() {
+		return Character.class;
+	}
+
 }

src/main/java/net/imagej/table/Column.java

@@ -56,5 +56,7 @@ public interface Column<T> extends List<T>, Sizable {
 	/** Sets the column's size (i.e., number of rows). */
 	@Override
 	void setSize(int size);
-	
+
+	/** Returns the actual type of data stored in the column. */
+	Class<T> getType();
 }

src/main/java/net/imagej/table/DefaultColumn.java

@@ -41,12 +41,16 @@
  */
 public class DefaultColumn<T> extends SizableArrayList<T> implements Column<T> {
 
+	/** The type of this column. */
+	private Class<T> type;
+
 	/** The column header. */
 	private String header;
 
 	public DefaultColumn() {}
 
-	public DefaultColumn(final String header) {
+	public DefaultColumn(final Class<T> type, final String header) {
+		this.type = type;
 		this.header = header;
 	}
 
@@ -62,4 +66,9 @@ public void setHeader(final String header) {
 		this.header = header;
 	}
 
+	@Override
+	public Class<T> getType() {
+		return type;
+	}
+
 }

src/main/java/net/imagej/table/DoubleColumn.java

@@ -61,4 +61,9 @@ public void setHeader(final String header) {
 		this.header = header;
 	}
 
+	@Override
+	public Class<Double> getType() {
+		return Double.class;
+	}
+
 }

src/main/java/net/imagej/table/FloatColumn.java

@@ -61,4 +61,9 @@ public void setHeader(final String header) {
 		this.header = header;
 	}
 
+	@Override
+	public Class<Float> getType() {
+		return Float.class;
+	}
+
 }

src/main/java/net/imagej/table/GenericColumn.java

@@ -43,7 +43,7 @@ public GenericColumn() {
 	}
 
 	public GenericColumn(final String header) {
-		super(header);
+		super(Object.class, header);
 	}
 
 }

src/main/java/net/imagej/table/IntColumn.java

@@ -61,4 +61,9 @@ public void setHeader(final String header) {
 		this.header = header;
 	}
 
+	@Override
+	public Class<Integer> getType() {
+		return Integer.class;
+	}
+
 }

src/main/java/net/imagej/table/LongColumn.java

@@ -61,4 +61,9 @@ public void setHeader(final String header) {
 		this.header = header;
 	}
 
+	@Override
+	public Class<Long> getType() {
+		return Long.class;
+	}
+
 }