Using @TargetType as a parameter for @Condition causes NPE during compiling. #2882
Description
It is not that useful to use @TargetType with @Condition since the class that the @TargetType will return, is the same as the class of the conditional parameter.
found by @ivlcic while working on the TargetPropertyName annotation.
Reproduction:
import org.mapstruct.Condition;
import org.mapstruct.Mapper;
import org.mapstruct.TargetType;
@Mapper
public interface NPECheck {
class Source {
String val;
public String getVal() {
return val;
}
}
class Target {
String val;
public void setVal(String val) {
this.val = val;
}
}
Target map(Source source);
@Condition
default boolean check(String val, @TargetType Class<?> type) {
return true;
}
}log:
/home/helral/Documents/GitHub/Zegveld/mapstruct-bug/src/main/java/NPECheck.java:[6,8]
Internal error in the mapping processor: java.lang.RuntimeException:
org.mapstruct.ap.shaded.freemarker.core._TemplateModelException:
Java method "org.mapstruct.ap.internal.model.MethodReference.inferTypeWhenEnum(org.mapstruct.ap.internal.model.common.Type)" threw an exception when invoked on org.mapstruct.ap.internal.model.MethodReference object "boolean #check()";
see cause exception in the Java stack trace.
---- FTL stack trace ("~" means nesting-related):
- Failed at: @includeModel object=inferTypeWhenEnu... [in template "org/mapstruct/ap/internal/model/MethodReference.ftl" in macro "arguments" at line 42, column 13]
- Reached through: #list parameterBindings as param [in template "org/mapstruct/ap/internal/model/MethodReference.ftl" in macro "arguments" at line 39, column 5]
- Reached through: @arguments [in template "org/mapstruct/ap/internal/model/MethodReference.ftl" in macro "methodCall" at line 32, column 53]
- Reached through: @methodCall [in template "org/mapstruct/ap/internal/model/MethodReference.ftl" at line 24, column 9]
----
at org.mapstruct.ap.internal.writer.ModelWriter.writeModel(ModelWriter.java:77)
at org.mapstruct.ap.internal.processor.MapperRenderingProcessor.createSourceFile(MapperRenderingProcessor.java:62)
at org.mapstruct.ap.internal.processor.MapperRenderingProcessor.writeToSourceFile(MapperRenderingProcessor.java:39)
at org.mapstruct.ap.internal.processor.MapperRenderingProcessor.process(MapperRenderingProcessor.java:29)
at org.mapstruct.ap.internal.processor.MapperRenderingProcessor.process(MapperRenderingProcessor.java:24)
at org.mapstruct.ap.MappingProcessor.process(MappingProcessor.java:350)
at org.mapstruct.ap.MappingProcessor.processMapperTypeElement(MappingProcessor.java:330)
at org.mapstruct.ap.MappingProcessor.processMapperElements(MappingProcessor.java:279)
at org.mapstruct.ap.MappingProcessor.process(MappingProcessor.java:174)
.... rest of stack trace omitted