Update CSVEncoder.

Author: gk-brown

kilo-client/src/main/java/org/httprpc/kilo/io/CSVEncoder.java

@@ -18,6 +18,7 @@
 
 import java.io.IOException;
 import java.io.Writer;
+import java.util.Date;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -145,24 +146,27 @@ private void encode(Iterable<?> rows, Writer writer) throws IOException {
                 var value = map.get(key);
 
                 if (value != null) {
-                    var type = value.getClass();
+                    if (!formatters.isEmpty()) {
+                        var type = value.getClass();
 
-                    while (type != null) {
-                        var formatter = formatters.get(type);
+                        while (type != null) {
+                            var formatter = formatters.get(type);
 
-                        if (formatter != null) {
-                            value = formatter.apply(value);
+                            if (formatter != null) {
+                                value = formatter.apply(value);
 
-                            break;
-                        }
+                                break;
+                            }
 
-                        type = type.getSuperclass();
+                            type = type.getSuperclass();
+                        }
                     }
 
                     switch (value) {
                         case CharSequence text -> encode(text, writer);
                         case Number number -> encode(number, writer);
                         case Boolean flag -> encode(flag, writer);
+                        case Date date -> encode(date, writer);
                         default -> encode(value.toString(), writer);
                     }
                 }
@@ -197,4 +201,8 @@ private void encode(Number number, Writer writer) throws IOException {
     private void encode(Boolean flag, Writer writer) throws IOException {
         writer.write(flag.toString());
     }
+
+    private void encode(Date date, Writer writer) throws IOException {
+        writer.write(String.valueOf(date.getTime()));
+    }
 }

kilo-client/src/test/java/org/httprpc/kilo/io/CSVEncoderTest.java

@@ -64,7 +64,8 @@ public void testMaps() throws IOException {
                 entry("a", "A,B,\"C\" "),
                 entry("b", 1),
                 entry("c", 2.0),
-                entry("d", true)
+                entry("d", true),
+                entry("e", new Date(0))
             ),
             mapOf(
                 entry("a", " D\r\nÉ\r\nF\r\n"),
@@ -82,7 +83,7 @@ public void testMaps() throws IOException {
         csvEncoder.write(rows, writer);
 
         var expected = "\"a\",\"b\",\"c\",\"D\",\"É\"\r\n"
-            + "\"A,B,\"\"C\"\" \",1,2.0,true,\r\n"
+            + "\"A,B,\"\"C\"\" \",1,2.0,true,0\r\n"
             + "\" D\r\nÉ\r\nF\r\n\",2,4.0,,\r\n";
 
         assertEquals(expected, writer.toString());