8025719: Change Chronology to an interface

Summary: Split Chronology and add AbstractChronology
Reviewed-by: darcy
Contributed-by: scolebourne@joda.org

src/share/classes/java/time/chrono/ChronoLocalDate.java

@@ -262,7 +262,7 @@ public interface ChronoLocalDate
      * @see #isEqual
      */
     static Comparator<ChronoLocalDate> timeLineOrder() {
-        return Chronology.DATE_ORDER;
+        return AbstractChronology.DATE_ORDER;
     }
 
     //-----------------------------------------------------------------------

src/share/classes/java/time/chrono/ChronoLocalDateTime.java

@@ -136,7 +136,7 @@ public interface ChronoLocalDateTime<D extends ChronoLocalDate>
      * @see #isEqual
      */
     static Comparator<ChronoLocalDateTime<?>> timeLineOrder() {
-        return Chronology.DATE_TIME_ORDER;
+        return AbstractChronology.DATE_TIME_ORDER;
     }
 
     //-----------------------------------------------------------------------

src/share/classes/java/time/chrono/ChronoZonedDateTime.java

@@ -137,7 +137,7 @@ public interface ChronoZonedDateTime<D extends ChronoLocalDate>
      * @see #isEqual
      */
     static Comparator<ChronoZonedDateTime<?>> timeLineOrder() {
-        return Chronology.INSTANT_ORDER;
+        return AbstractChronology.INSTANT_ORDER;
     }
 
     //-----------------------------------------------------------------------

src/share/classes/java/time/chrono/HijrahChronology.java

@@ -214,7 +214,7 @@ import sun.util.logging.PlatformLogger;
  *
  * @since 1.8
  */
-public final class HijrahChronology extends Chronology implements Serializable {
+public final class HijrahChronology extends AbstractChronology implements Serializable {
 
     /**
      * The Hijrah Calendar id.
@@ -308,8 +308,8 @@ public final class HijrahChronology extends Chronology implements Serializable {
         try {
             INSTANCE = new HijrahChronology("Hijrah-umalqura");
             // Register it by its aliases
-            Chronology.registerChrono(INSTANCE, "Hijrah");
-            Chronology.registerChrono(INSTANCE, "islamic");
+            AbstractChronology.registerChrono(INSTANCE, "Hijrah");
+            AbstractChronology.registerChrono(INSTANCE, "islamic");
         } catch (DateTimeException ex) {
             // Absence of Hijrah calendar is fatal to initializing this class.
             PlatformLogger logger = PlatformLogger.getLogger("java.time.chrono");
@@ -336,7 +336,7 @@ public final class HijrahChronology extends Chronology implements Serializable {
                 try {
                     // Create and register the variant
                     HijrahChronology chrono = new HijrahChronology(id);
-                    Chronology.registerChrono(chrono);
+                    AbstractChronology.registerChrono(chrono);
                 } catch (DateTimeException ex) {
                     // Log error and continue
                     PlatformLogger logger = PlatformLogger.getLogger("java.time.chrono");

src/share/classes/java/time/chrono/IsoChronology.java

@@ -120,7 +120,7 @@ import java.util.Objects;
  *
  * @since 1.8
  */
-public final class IsoChronology extends Chronology implements Serializable {
+public final class IsoChronology extends AbstractChronology implements Serializable {
 
     /**
      * Singleton instance of the ISO chronology.

src/share/classes/java/time/chrono/JapaneseChronology.java

@@ -120,7 +120,7 @@ import sun.util.calendar.LocalGregorianCalendar;
  *
  * @since 1.8
  */
-public final class JapaneseChronology extends Chronology implements Serializable {
+public final class JapaneseChronology extends AbstractChronology implements Serializable {
 
     static final LocalGregorianCalendar JCAL =
         (LocalGregorianCalendar) CalendarSystem.forName("japanese");

src/share/classes/java/time/chrono/MinguoChronology.java

@@ -105,7 +105,7 @@ import java.util.Map;
  *
  * @since 1.8
  */
-public final class MinguoChronology extends Chronology implements Serializable {
+public final class MinguoChronology extends AbstractChronology implements Serializable {
 
     /**
      * Singleton instance for the Minguo chronology.

src/share/classes/java/time/chrono/Ser.java

@@ -161,7 +161,7 @@ final class Ser implements Externalizable {
         out.writeByte(type);
         switch (type) {
             case CHRONO_TYPE:
-                ((Chronology) object).writeExternal(out);
+                ((AbstractChronology) object).writeExternal(out);
                 break;
             case CHRONO_LOCAL_DATE_TIME_TYPE:
                 ((ChronoLocalDateTimeImpl<?>) object).writeExternal(out);
@@ -231,7 +231,7 @@ final class Ser implements Externalizable {
 
     private static Object readInternal(byte type, ObjectInput in) throws IOException, ClassNotFoundException {
         switch (type) {
-            case CHRONO_TYPE: return Chronology.readExternal(in);
+            case CHRONO_TYPE: return AbstractChronology.readExternal(in);
             case CHRONO_LOCAL_DATE_TIME_TYPE: return ChronoLocalDateTimeImpl.readExternal(in);
             case CHRONO_ZONE_DATE_TIME_TYPE: return ChronoZonedDateTimeImpl.readExternal(in);
             case JAPANESE_DATE_TYPE:  return JapaneseDate.readExternal(in);

src/share/classes/java/time/chrono/ThaiBuddhistChronology.java

@@ -106,7 +106,7 @@ import java.util.Map;
  *
  * @since 1.8
  */
-public final class ThaiBuddhistChronology extends Chronology implements Serializable {
+public final class ThaiBuddhistChronology extends AbstractChronology implements Serializable {
 
     /**
      * Singleton instance of the Buddhist chronology.

test/java/time/tck/java/time/chrono/CopticChronology.java

@@ -59,13 +59,11 @@ package tck.java.time.chrono;
 import static java.time.temporal.ChronoField.EPOCH_DAY;
 
 import java.io.Serializable;
-
+import java.time.chrono.AbstractChronology;
+import java.time.chrono.Era;
 import java.time.temporal.ChronoField;
 import java.time.temporal.TemporalAccessor;
 import java.time.temporal.ValueRange;
-import java.time.chrono.Chronology;
-import java.time.chrono.Era;
-
 import java.util.Arrays;
 import java.util.List;
 import java.util.Locale;
@@ -95,7 +93,7 @@ import java.util.Locale;
  * <h4>Implementation notes</h4>
  * This class is immutable and thread-safe.
  */
-public final class CopticChronology extends Chronology implements Serializable {
+public final class CopticChronology extends AbstractChronology implements Serializable {
 
     /**
      * Singleton instance of the Coptic chronology.