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Better error message for missing adapters #305

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Merged
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May 28, 2025
Merged

Better error message for missing adapters #305

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11 changes: 8 additions & 3 deletions validator/src/main/java/io/avaje/validation/core/CoreAdapterBuilder.java
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Original file line number Diff line number Diff line change
Expand Up @@ -12,15 +12,15 @@
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.Supplier;

import io.avaje.validation.adapter.ConstraintAdapter;
import io.avaje.validation.groups.Default;
import org.jspecify.annotations.Nullable;

import io.avaje.validation.adapter.ConstraintAdapter;
import io.avaje.validation.adapter.ValidationAdapter;
import io.avaje.validation.adapter.ValidationContext;
import io.avaje.validation.core.adapters.BasicAdapters;
import io.avaje.validation.core.adapters.FuturePastAdapterFactory;
import io.avaje.validation.core.adapters.NumberAdapters;
import io.avaje.validation.groups.Default;
import io.avaje.validation.spi.AdapterFactory;
import io.avaje.validation.spi.AnnotationFactory;

Expand Down Expand Up @@ -72,7 +72,12 @@ private <T> ValidationAdapter<T> buildForType(Type type) {
return result;
}
}
throw new IllegalArgumentException("No ValidationAdapter for " + type + ". Perhaps needs @Valid or @Valid.Import?");
throw new IllegalArgumentException(
"No ValidationAdapter for "
+ type
+ "\nPossible Causes: \n"
+ "1. Missing @Valid or @Valid.Import annotation.\n"
+ "2. The avaje-validator-generator dependency was not present during compilation\n");
}

<T> ValidationAdapter<T> annotationAdapter(
Expand Down