private PsiType rawTypeForTypeParameter(final PsiTypeParameter typeParameter) {
final PsiClassType[] extendsTypes = typeParameter.getExtendsListTypes();
if (extendsTypes.length > 0) {
// First bound
return substitute(extendsTypes[0]);
}
// Object
return PsiType.getJavaLangObject(typeParameter.getManager(), typeParameter.getResolveScope());
}
/**
* @param methodSignature method signature
* @param superMethodSignature super method signature
* @return null if signatures do not match
*/
@Nullable
public static PsiSubstitutor getSuperMethodSignatureSubstitutor(
@NotNull MethodSignature methodSignature, @NotNull MethodSignature superMethodSignature) {
PsiSubstitutor result =
getSuperMethodSignatureSubstitutorImpl(methodSignature, superMethodSignature);
if (result == null) return null;
PsiTypeParameter[] methodTypeParameters = methodSignature.getTypeParameters();
PsiTypeParameter[] superTypeParameters = superMethodSignature.getTypeParameters();
PsiSubstitutor methodSubstitutor = methodSignature.getSubstitutor();
// check bounds
for (int i = 0; i < methodTypeParameters.length; i++) {
PsiTypeParameter methodTypeParameter = methodTypeParameters[i];
PsiTypeParameter superTypeParameter = superTypeParameters[i];
final Set<PsiType> methodSupers = new HashSet<PsiType>();
for (PsiClassType methodSuper : methodTypeParameter.getSuperTypes()) {
methodSupers.add(methodSubstitutor.substitute(methodSuper));
}
final Set<PsiType> superSupers = new HashSet<PsiType>();
for (PsiClassType superSuper : superTypeParameter.getSuperTypes()) {
superSupers.add(
methodSubstitutor.substitute(
PsiUtil.captureToplevelWildcards(
result.substitute(superSuper), methodTypeParameter)));
}
methodSupers.remove(
PsiType.getJavaLangObject(
methodTypeParameter.getManager(), methodTypeParameter.getResolveScope()));
superSupers.remove(
PsiType.getJavaLangObject(
superTypeParameter.getManager(), superTypeParameter.getResolveScope()));
if (!methodSupers.equals(superSupers)) return null;
}
return result;
}
private PsiType addBounds(PsiType substituted, final PsiTypeParameter typeParameter) {
PsiElement captureContext = null;
if (substituted instanceof PsiCapturedWildcardType) {
final PsiCapturedWildcardType captured = (PsiCapturedWildcardType) substituted;
substituted = captured.getWildcard();
captureContext = captured.getContext();
}
if (substituted instanceof PsiWildcardType && !((PsiWildcardType) substituted).isSuper()) {
PsiType originalBound = ((PsiWildcardType) substituted).getBound();
PsiManager manager = typeParameter.getManager();
final PsiType[] boundTypes = typeParameter.getExtendsListTypes();
for (PsiType boundType : boundTypes) {
PsiType substitutedBoundType = boundType.accept(mySimpleSubstitutionVisitor);
PsiWildcardType wildcardType = (PsiWildcardType) substituted;
if (substitutedBoundType != null
&& !(substitutedBoundType instanceof PsiWildcardType)
&& !substitutedBoundType.equalsToText("java.lang.Object")) {
if (originalBound == null
|| (!TypeConversionUtil.erasure(substitutedBoundType)
.isAssignableFrom(TypeConversionUtil.erasure(originalBound))
&& !TypeConversionUtil.erasure(substitutedBoundType)
.isAssignableFrom(
originalBound))) { // erasure is essential to avoid infinite recursion
if (wildcardType.isExtends()) {
final PsiType glb =
GenericsUtil.getGreatestLowerBound(wildcardType.getBound(), substitutedBoundType);
if (glb != null) {
substituted = PsiWildcardType.createExtends(manager, glb);
}
} else {
// unbounded
substituted = PsiWildcardType.createExtends(manager, substitutedBoundType);
}
}
}
}
}
if (captureContext != null) {
LOG.assertTrue(substituted instanceof PsiWildcardType);
substituted = PsiCapturedWildcardType.create((PsiWildcardType) substituted, captureContext);
}
return substituted;
}
@Override
public boolean equals(PsiTypeParameter element1, PsiTypeParameter element2) {
return element1.getManager().areElementsEquivalent(element1, element2);
}