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Cannot define an identity index with unique constraint #627

@JPnCo

Description

@JPnCo

Environment Details

  • EclipseStore Version: 4.0.0
  • JDK version:25
  • OS:MacOS
  • Used frameworks: e.g. MicroFramework X, Spring, ... : no framework

Describe the bug

A clear and concise description of what the bug is.
In the paragraph Identity indexing of the manual, the following sample throws an exception at runtime.

// identity index with unique constraint
final GigaMap gigaMap = GigaMap.Builder()
.withBitmapIdentityIndex(PersonIndices.id)
.withBitmapUniqueIndex(PersonIndices.id) // enforce uniqueness at runtime
...
.build();

Exception in thread "main" java.lang.RuntimeException: BitmapIndex already registered for name "id".
at org.eclipse.store.gigamap.types.BitmapIndices$Default.validateIndexToAdd(BitmapIndices.java:1005)
at org.eclipse.store.gigamap.types.BitmapIndices$Default.addUniqueConstraints(BitmapIndices.java:1048)
at org.eclipse.store.gigamap.types.GigaMap$Builder$Default.build(GigaMap.java:854)
at issues.Issue1.main(Issue1.java:33)

To Reproduce

Step by step instructions to reproduce the problem.
Compile an run the following class 👍 import org.eclipse.store.gigamap.types.GigaMap;
import org.eclipse.store.gigamap.types.IndexerString;

public class Issue1 {
public class Indexes {
public final static IndexerString id = new IndexerString.Abstract<>() {
@OverRide
protected String getString(final Type type) {
return type.getId();
}
public String name() {
return "id";
}
};
}
class Type {
private String id;
public String getId() {
return id;
}
}
public static void main(final String[] args) {
GigaMap.Builder().withBitmapIdentityIndex(Indexes.id).withBitmapUniqueIndex(Indexes.id).build();
}
}

Expected behavior

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Defining an identity index with unique constraint must be possible.

Screenshots

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Additional context

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package issues;

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