(streampipes) branch 4101-precision-loss-in-correctionvaluetransformationruledescription-migration updated: fix(#4101): Increase precision for correction value transformation migration

[zehnder]

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zehnder pushed a commit to branch 
4101-precision-loss-in-correctionvaluetransformationruledescription-migration
in repository https://gitbox.apache.org/repos/asf/streampipes.git


The following commit(s) were added to 
refs/heads/4101-precision-loss-in-correctionvaluetransformationruledescription-migration
 by this push:
     new 0b04771663 fix(#4101): Increase precision for correction value 
transformation migration
0b04771663 is described below

commit 0b0477166339a827d99e48c74a3de6aba53a58de
Author: Philipp Zehnder <ten...@users.noreply.github.com>
AuthorDate: Fri Jan 16 10:10:47 2026 +0100

    fix(#4101): Increase precision for correction value transformation migration
---
 .../migrations/v099/connect/AdapterRuleConverter.java  |  2 +-
 .../v099/MigrateAdaptersToUseScriptTest.java           | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git 
a/streampipes-service-core/src/main/java/org/apache/streampipes/service/core/migrations/v099/connect/AdapterRuleConverter.java
 
b/streampipes-service-core/src/main/java/org/apache/streampipes/service/core/migrations/v099/connect/AdapterRuleConverter.java
index 193a712d1d..d964ae32ed 100644
--- 
a/streampipes-service-core/src/main/java/org/apache/streampipes/service/core/migrations/v099/connect/AdapterRuleConverter.java
+++ 
b/streampipes-service-core/src/main/java/org/apache/streampipes/service/core/migrations/v099/connect/AdapterRuleConverter.java
@@ -130,7 +130,7 @@ public class AdapterRuleConverter {
     }
 
     var symbols = new DecimalFormatSymbols(Locale.US);
-    var df = new DecimalFormat("0.###", symbols);
+    var df = new DecimalFormat("0.########################", symbols);
     var formattedValue = df.format(rule.getCorrectionValue());
 
     scriptBuilder.appendLine(String.format("event['%s'] = Number(event['%s']) 
%s %s;",
diff --git 
a/streampipes-service-core/src/test/java/org/apache/streampipes/service/core/migrations/v099/MigrateAdaptersToUseScriptTest.java
 
b/streampipes-service-core/src/test/java/org/apache/streampipes/service/core/migrations/v099/MigrateAdaptersToUseScriptTest.java
index b12978ec67..4d816d9432 100644
--- 
a/streampipes-service-core/src/test/java/org/apache/streampipes/service/core/migrations/v099/MigrateAdaptersToUseScriptTest.java
+++ 
b/streampipes-service-core/src/test/java/org/apache/streampipes/service/core/migrations/v099/MigrateAdaptersToUseScriptTest.java
@@ -189,6 +189,24 @@ class MigrateAdaptersToUseScriptTest {
     assertTrue(adapter.getTransformationConfig().isScriptActive());
   }
 
+  @Test
+  void executeMigration_TransformsCorrectionValueRuleWithVerySmallNumber() 
throws IOException {
+    CorrectionValueTransformationRuleDescription rule = new 
CorrectionValueTransformationRuleDescription();
+    rule.setRuntimeKey("temperature");
+    rule.setOperator("MULTIPLY");
+    rule.setCorrectionValue(0.000000000000000000001);
+
+    var adapter = createBaseAdapter(rule);
+    when(mockStorage.findAll()).thenReturn(List.of(adapter));
+
+    migration.executeMigration();
+
+    var script = adapter.getTransformationConfig().getScript();
+    assertTrue(script.contains("event['temperature'] = 
Number(event['temperature']) * 0.000000000000000000001"));
+    assertTrue(adapter.getTransformationConfig().isScriptActive());
+  }
+
+
   @Test
   void executeMigration_TransformsRegexRule() throws IOException {
     RegexTransformationRuleDescription rule = new 
RegexTransformationRuleDescription();