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package io.dico.dicore.command.parameter.type;
import io.dico.dicore.Reflection;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
/**
* This class serves the purpose of having annotated parameter configurations (such as ranges for number parameters).
* Such configurations must be possible to obtain without using annotations, and as such, there should be a class conveying the information
* that is separate from the annotation itself. This class acts as a bridge from the annotation to said class conveying the information.
*
* @param <TAnnotation> the annotation type for parameters
* @param <TParamInfo> the object type that holds the information required in memory
*/
public abstract class ParameterConfig<TAnnotation extends Annotation, TParamInfo> implements Comparable<ParameterConfig<?, ?>> {
private final Class<TAnnotation> annotationClass;
// protected final TParamInfo defaultValue;
public ParameterConfig(Class<TAnnotation> annotationClass/*, TParamInfo defaultValue*/) {
this.annotationClass = annotationClass;
//this.defaultValue = defaultValue;
}
public final Class<TAnnotation> getAnnotationClass() {
return annotationClass;
}
/*
public TParamInfo getDefaultValue() {
return defaultValue;
}*/
protected abstract TParamInfo toParameterInfo(TAnnotation annotation);
public TParamInfo getParameterInfo(Annotation annotation) {
//noinspection unchecked
return toParameterInfo((TAnnotation) annotation);
}
public static <TAnnotation extends Annotation, TParamInfo> ParameterConfig<TAnnotation, TParamInfo>
includeMemoryClass(Class<TAnnotation> annotationClass, Class<TParamInfo> memoryClass) {
Constructor<TParamInfo> constructor;
//TParamInfo defaultValue;
try {
constructor = memoryClass.getConstructor(annotationClass);
//defaultValue = Reflection.getStaticFieldValue(annotationClass, "DEFAULT");
} catch (NoSuchMethodException | IllegalArgumentException ex) {
throw new IllegalArgumentException(ex);
}
/*
if (defaultValue == null) try {
defaultValue = memoryClass.newInstance();
} catch (IllegalAccessException | InstantiationException ex) {
throw new IllegalArgumentException("Failed to get a default value for the param info", ex);
}*/
return new ParameterConfig<TAnnotation, TParamInfo>(annotationClass/*, defaultValue*/) {
@Override
public TParamInfo toParameterInfo(TAnnotation annotation) {
try {
return constructor.newInstance(annotation);
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}
};
}
public static <TAnnotation extends Annotation, TParamInfo> ParameterConfig<TAnnotation, TParamInfo> getMemoryClassFromField(Class<TAnnotation> annotationClass) {
return ParameterConfig.includeMemoryClass(annotationClass, Reflection.getStaticFieldValue(annotationClass, "MEMORY_CLASS"));
}
@Override
public int compareTo(ParameterConfig<?, ?> o) {
return 0;
}
}
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