✨ #4 Support for boolean

src/main/java/org/moditect/jfranalytics/JfrSchema.java

@@ -19,6 +19,7 @@
 import java.lang.System.Logger.Level;
 import java.nio.file.Path;
 import java.sql.Timestamp;
+import java.time.Duration;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -108,6 +109,9 @@ private static RelDataType getRelDataType(EventType eventType, ValueDescriptor f
             case "int":
                 type = typeFactory.createJavaType(int.class);
                 break;
+            case "boolean":
+                type = typeFactory.createJavaType(boolean.class);
+                break;
             case "long":
                 if ("jdk.jfr.Timestamp".equals(field.getContentType())) {
                     type = typeFactory.createJavaType(Timestamp.class);
@@ -178,7 +182,12 @@ else if (recordedClassLoader.getName() != null) {
 
         // 3. further special cases
         else if (field.getAnnotation(Timespan.class) != null) {
-            return event -> event.getDuration(field.getName()).toNanos();
+            return event -> {
+                Duration duration = event.getDuration(field.getName());
+                // Long.MIN_VALUE is used as a sentinel value for absent values e.g. for jdk.GCConfiguration.pauseTarget
+                // TODO: handle nanos value overflow
+                return duration.getSeconds() == Long.MIN_VALUE ? Long.MIN_VALUE : duration.toNanos();
+            };
         }
 
         // 4. default pass-through

src/test/java/org/moditect/jfranalytics/JfrSchemaFactoryTest.java

@@ -200,6 +200,33 @@ public void canRunSimpleSelectFromClassLoad() throws Exception {
         }
     }
 
+    @Test
+    public void canRunSimpleSelectFromGcConfiguration() throws Exception {
+        try (Connection connection = getConnection("gc-configuration.jfr")) {
+            PreparedStatement statement = connection.prepareStatement("""
+                    SELECT *
+                    FROM "jfr"."jdk.GCConfiguration"
+                    """);
+
+            try (ResultSet rs = statement.executeQuery()) {
+                assertThat(rs.next()).isTrue();
+
+                assertThat(rs.getTimestamp(1)).isEqualTo(Timestamp.from(ZonedDateTime.parse("2021-12-28T16:13:32.114000000+01:00").toInstant()));
+                assertThat(rs.getString(2)).isEqualTo("G1New");
+                assertThat(rs.getString(3)).isEqualTo("G1Old");
+                assertThat(rs.getInt(4)).isEqualTo(10);
+                assertThat(rs.getInt(5)).isEqualTo(3);
+                assertThat(rs.getBoolean(6)).isTrue();
+                assertThat(rs.getBoolean(7)).isFalse();
+                assertThat(rs.getBoolean(8)).isFalse();
+                assertThat(rs.getLong(9)).isEqualTo(Long.MIN_VALUE);
+                assertThat(rs.getInt(10)).isEqualTo(12);
+
+                assertThat(rs.next()).isFalse();
+            }
+        }
+    }
+
     @Test
     public void canUseGetClassNameFunction() throws Exception {
         try (Connection connection = getConnection("class-loading.jfr")) {