{"record":{"id":"4fdee0e22570aa61","repo":"hibernate/hibernate-orm","slug":"not-an-entity-entityname","errorCode":null,"errorMessage":"Not an entity: ${entityName}","messagePattern":"Not an entity: (.+?)","errorType":"exception","errorClass":"IllegalArgumentException","httpStatus":null,"severity":"error","filePath":"hibernate-core/src/main/java/org/hibernate/metamodel/model/domain/internal/JpaMetamodelImpl.java","lineNumber":174,"sourceCode":"\n\t\tfor ( var entry : managedTypeByName.entrySet() ) {\n\t\t\tif ( entry.getValue() instanceof EntityDomainType<?> possibility ) {\n\t\t\t\tif ( entityName.equals( possibility.getName() ) ) {\n\t\t\t\t\treturn possibility;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t@Override\n\t@Nonnull\n\tpublic EntityDomainType<?> entity(@Nullable String entityName) {\n\t\tfinal EntityDomainType<?> entityType = findEntityType( entityName );\n\t\tif ( entityType == null ) {\n\t\t\t// per JPA, this is an exception\n\t\t\tthrow new IllegalArgumentException( \"Not an entity: \" + entityName );\n\t\t}\n\t\treturn entityType;\n\n\t}\n\n\t@Override\n\t@Nullable\n\tpublic EmbeddableDomainType<?> findEmbeddableType(@Nullable String embeddableName) {\n\t\tif ( embeddableName == null ) {\n\t\t\treturn null;\n\t\t}\n\t\tfinal var managedType = managedTypeByName.get( embeddableName );\n\t\tif ( !( managedType instanceof EmbeddableDomainType<?> embeddableDomainType ) ) {\n\t\t\treturn null;\n\t\t}\n\t\treturn embeddableDomainType;\n\t}\n","sourceCodeStart":156,"sourceCodeEnd":192,"githubUrl":"https://github.com/hibernate/hibernate-orm/blob/fad1729dce015f908198d57a8d80274a30f905a5/hibernate-core/src/main/java/org/hibernate/metamodel/model/domain/internal/JpaMetamodelImpl.java#L156-L192","documentation":"Error \"Not an entity: ${entityName}\" thrown in hibernate/hibernate-orm.","triggerScenarios":"Thrown when JpaMetamodel.entity() is called with a type name that is not a mapped entity.","commonSituations":"See trigger scenarios.","solutions":["Pass the name of a mapped entity; check spelling and that the class is annotated @Entity."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"fad1729dce015f908198d57a8d80274a30f905a5","analyzedAt":"2026-08-22T04:13:57.527Z","schemaVersion":2},"datasetVersion":"2026-08-22T09:17:25.309Z"}