Fix date serialization

src/main/java/com/github/reinert/jjschema/SimpleTypeMappings.java

@@ -24,10 +24,7 @@
 import java.time.Instant;
 import java.time.LocalDate;
 import java.time.ZonedDateTime;
-import java.util.AbstractCollection;
-import java.util.IdentityHashMap;
-import java.util.Map;
-import java.util.UUID;
+import java.util.*;
 
 /**
  * Mapping of builtin Java types to their matching JSON Schema primitive type
@@ -60,9 +57,10 @@ public enum SimpleTypeMappings {
     CHARSEQUENCE(CharSequence.class, "string"),
     STRING(String.class, "string"),
     UUID(UUID.class, "string"),
-    ZONEDDATETIME(ZonedDateTime.class,"string"),
-    LOCALDATE(LocalDate.class,"string"),
-    INSTANT(Instant.class,"string");
+    DATE(Date.class, "string"),
+    ZONEDDATETIME(ZonedDateTime.class, "string"),
+    LOCALDATE(LocalDate.class, "string"),
+    INSTANT(Instant.class, "string");
 
     private static final Map<Class<?>, String> MAPPINGS;
 

src/test/java/com/github/reinert/jjschema/v1/DateTimeTest.java

@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2018, Danilo Reinert (daniloreinert@growbit.com)
+ *
+ * This software is dual-licensed under:
+ *
+ * - the Lesser General Public License (LGPL) version 3.0 or, at your option, any
+ *   later version;
+ * - the Apache Software License (ASL) version 2.0.
+ *
+ * The text of both licenses is available under the src/resources/ directory of
+ * this project (under the names LGPL-3.0.txt and ASL-2.0.txt respectively).
+ *
+ * Direct link to the sources:
+ *
+ * - LGPL 3.0: https://www.gnu.org/licenses/lgpl-3.0.txt
+ * - ASL 2.0: http://www.apache.org/licenses/LICENSE-2.0.txt
+ */
+
+package com.github.reinert.jjschema.v1;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.github.reinert.jjschema.exception.UnavailableVersion;
+import junit.framework.TestCase;
+
+import java.io.IOException;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.ZonedDateTime;
+import java.util.Date;
+import java.util.Map;
+
+/**
+ * @author reinert
+ */
+public class DateTimeTest extends TestCase {
+
+    static ObjectMapper MAPPER = new ObjectMapper();
+    JsonSchemaFactory schemaFactory = new JsonSchemaV4Factory();
+
+    public DateTimeTest(String testName) {
+        super(testName);
+    }
+
+    @SuppressWarnings({ "unchecked", "rawtypes" })
+    public void testGenerateSchema() throws UnavailableVersion, JsonProcessingException, IOException {
+        JsonNode fromJavaType = schemaFactory.createSchema(DateTime.class);
+//        System.out.println(MAPPER.writerWithDefaultPrettyPrinter().writeValueAsString(fromJavaType));
+        String str = MAPPER.writeValueAsString(fromJavaType);
+        Map<String, Object> result = MAPPER.readValue(str, Map.class);
+        assertNotNull(result);
+        assertEquals("object", result.get("type"));
+        assertNotNull(result.get("properties"));
+        Map properties = (Map) result.get("properties");
+        assertEquals("string", ((Map) properties.get("date")).get("type"));
+        assertEquals("string", ((Map) properties.get("instant")).get("type"));
+        assertEquals("string", ((Map) properties.get("localDate")).get("type"));
+        assertEquals("string", ((Map) properties.get("zonedDateTime")).get("type"));
+    }
+
+    static class DateTime {
+        private Date date;
+        private Instant instant;
+        private LocalDate localDate;
+        private ZonedDateTime zonedDateTime;
+
+        public Date getDate() {
+            return date;
+        }
+
+        public Instant getInstant() {
+            return instant;
+        }
+
+        public LocalDate getLocalDate() {
+            return localDate;
+        }
+
+        public ZonedDateTime getZonedDateTime() {
+            return zonedDateTime;
+        }
+    }
+}