Adding LocalDateTime Support via Extensions (Issue FasterXML#100)

jr-annotation-support/src/main/java/com/fasterxml/jackson/jr/annotationsupport/JacksonLocalDateTimeExtension.java

@@ -0,0 +1,12 @@
+package com.fasterxml.jackson.jr.annotationsupport;
+
+import com.fasterxml.jackson.jr.ob.JacksonJrExtension;
+import com.fasterxml.jackson.jr.ob.api.ExtensionContext;
+import com.fasterxml.jackson.jr.ob.impl.LocalDateTimeReaderWriterProvider;
+
+public class JacksonLocalDateTimeExtension extends JacksonJrExtension {
+    @Override
+    protected void register(ExtensionContext ctxt) {
+        ctxt.insertProvider(new LocalDateTimeReaderWriterProvider());
+    }
+}

jr-objects/src/main/java/com/fasterxml/jackson/jr/ob/impl/LocalDateTimeReaderWriterProvider.java

@@ -0,0 +1,19 @@
+package com.fasterxml.jackson.jr.ob.impl;
+
+import com.fasterxml.jackson.jr.ob.api.ReaderWriterProvider;
+import com.fasterxml.jackson.jr.ob.api.ValueReader;
+import com.fasterxml.jackson.jr.ob.api.ValueWriter;
+
+import java.time.LocalDateTime;
+
+public class LocalDateTimeReaderWriterProvider extends ReaderWriterProvider {
+    @Override
+    public ValueReader findValueReader(JSONReader readContext, Class<?> type) {
+        return type.equals(LocalDateTime.class) ? new LocalDateTimeValueReader() : null;
+    }
+
+    @Override
+    public ValueWriter findValueWriter(JSONWriter writeContext, Class<?> type) {
+        return type.equals(LocalDateTime.class) ? new LocalDateTimeValueWriter() : null;
+    }
+}

jr-objects/src/main/java/com/fasterxml/jackson/jr/ob/impl/LocalDateTimeValueReader.java

@@ -0,0 +1,19 @@
+package com.fasterxml.jackson.jr.ob.impl;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.jr.ob.api.ValueReader;
+
+import java.io.IOException;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+
+public class LocalDateTimeValueReader extends ValueReader {
+    LocalDateTimeValueReader() {
+        super(LocalDateTime.class);
+    }
+
+    @Override
+    public Object read(JSONReader reader, JsonParser p) throws IOException {
+        return LocalDateTime.parse(p.getText(), DateTimeFormatter.ISO_LOCAL_DATE_TIME);
+    }
+}

jr-objects/src/main/java/com/fasterxml/jackson/jr/ob/impl/LocalDateTimeValueWriter.java

@@ -0,0 +1,21 @@
+package com.fasterxml.jackson.jr.ob.impl;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.jr.ob.api.ValueWriter;
+
+import java.io.IOException;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+
+public class LocalDateTimeValueWriter implements ValueWriter {
+    @Override
+    public void writeValue(JSONWriter context, JsonGenerator g, Object value) throws IOException {
+        String localDateTimeString = ((LocalDateTime) value).format(DateTimeFormatter.ISO_LOCAL_DATE_TIME);
+        context.writeValue(localDateTimeString);
+    }
+
+    @Override
+    public Class<?> valueType() {
+        return LocalDateTime.class;
+    }
+}