DATACMNS-951 - Added Converter implementations for JSR-310 Duration and Period.

Original pull request: #186.

Author: Barak Schuster

src/main/java/org/springframework/data/convert/Jsr310Converters.java

@@ -19,11 +19,7 @@
 import static java.time.LocalDateTime.*;
 import static java.time.ZoneId.*;
 
-import java.time.Instant;
-import java.time.LocalDate;
-import java.time.LocalDateTime;
-import java.time.LocalTime;
-import java.time.ZoneId;
+import java.time.*;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
@@ -66,6 +62,10 @@ public abstract class Jsr310Converters {
 		converters.add(InstantToDateConverter.INSTANCE);
 		converters.add(ZoneIdToStringConverter.INSTANCE);
 		converters.add(StringToZoneIdConverter.INSTANCE);
+		converters.add(DurationToStringConverter.INSTANCE);
+		converters.add(StringToDurationConverter.INSTANCE);
+		converters.add(PeriodToStringConverter.INSTANCE);
+		converters.add(StringToPeriodConverter.INSTANCE);
 
 		return converters;
 	}
@@ -181,4 +181,58 @@ public ZoneId convert(String source) {
 			return ZoneId.of(source);
 		}
 	}
+
+	/**
+	 * enable jsr-310 {@link java.time.Duration} write
+	 */
+	@WritingConverter
+	public static enum DurationToStringConverter implements Converter<Duration, String> {
+		INSTANCE;
+
+		@Override
+		public String convert(Duration duration) {
+			return duration.toString();
+		}
+	}
+
+	/**
+	 * enable jsr-310 {@link java.time.Duration} read
+	 */
+	@ReadingConverter
+	public static enum StringToDurationConverter implements Converter<String, Duration> {
+
+		INSTANCE;
+
+		@Override
+		public Duration convert(String s) {
+			return Duration.parse(s);
+		}
+	}
+
+	/**
+	 * enable jsr-310 {@link java.time.Period} write
+	 */
+	@WritingConverter
+	public static enum PeriodToStringConverter implements Converter<Period, String> {
+		INSTANCE;
+
+		@Override
+		public String convert(Period period) {
+			return period.toString();
+		}
+	}
+
+	/**
+	 * enable jsr-310 {@link java.time.Period} read
+	 */
+	@ReadingConverter
+	public static enum StringToPeriodConverter implements Converter<String, Period> {
+
+		INSTANCE;
+
+		@Override
+		public Period convert(String s) {
+			return Period.parse(s);
+		}
+	}
 }

src/test/java/org/springframework/data/convert/Jsr310ConvertersUnitTests.java

@@ -19,11 +19,7 @@
 import static org.junit.Assert.*;
 
 import java.text.SimpleDateFormat;
-import java.time.Instant;
-import java.time.LocalDate;
-import java.time.LocalDateTime;
-import java.time.LocalTime;
-import java.time.ZoneId;
+import java.time.*;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.Map;
@@ -37,7 +33,7 @@
 /**
  * Unit tests for {@link Jsr310Converters}.
  * 
- * @author Oliver Gierke
+ * @author Oliver Gierke & Barak Schoster
  */
 public class Jsr310ConvertersUnitTests {
 
@@ -143,6 +139,38 @@ public void convertsZoneIdToStringAndBack() {
 		}
 	}
 
+	@Test
+	public void convertsDurationToStringAndBack() {
+
+		Map<String, Duration> ids = new HashMap<String, Duration>();
+		ids.put("PT240H", Duration.ofDays(10));
+		ids.put("PT2H", Duration.ofHours(2));
+		ids.put("PT3M", Duration.ofMinutes(3));
+		ids.put("PT4S", Duration.ofSeconds(4));
+		ids.put("PT0.005S", Duration.ofMillis(5));
+		ids.put("PT0.000000006S", Duration.ofNanos(6));
+
+
+		for (Entry<String, Duration> entry : ids.entrySet()) {
+			assertThat(CONVERSION_SERVICE.convert(entry.getValue(), String.class), is(entry.getKey()));
+			assertThat(CONVERSION_SERVICE.convert(entry.getKey(), Duration.class), is(entry.getValue()));
+		}
+	}
+
+	@Test
+	public void convertsPeriodToStringAndBack() {
+
+		Map<String, Period> ids = new HashMap<String, Period>();
+		ids.put("P2D", Period.ofDays(2));
+		ids.put("P21D", Period.ofWeeks(3));
+		ids.put("P4M", Period.ofMonths(4));
+		ids.put("P5Y", Period.ofYears(5));
+
+		for (Entry<String, Period> entry : ids.entrySet()) {
+			assertThat(CONVERSION_SERVICE.convert(entry.getValue(), String.class), is(entry.getKey()));
+			assertThat(CONVERSION_SERVICE.convert(entry.getKey(), Period.class), is(entry.getValue()));
+		}
+	}
 	private static String format(Date date, String format) {
 		return new SimpleDateFormat(format).format(date);
 	}