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org.jetbrains.kotlin.resolve.lazy.LazyDeclarationResolver Maven / Gradle / Ivy
/*
* Copyright 2010-2017 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.kotlin.resolve.lazy;
import com.intellij.psi.PsiElement;
import com.intellij.psi.util.PsiTreeUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.kotlin.context.GlobalContext;
import org.jetbrains.kotlin.descriptors.*;
import org.jetbrains.kotlin.incremental.KotlinLookupLocation;
import org.jetbrains.kotlin.incremental.components.LookupLocation;
import org.jetbrains.kotlin.incremental.components.NoLookupLocation;
import org.jetbrains.kotlin.name.FqName;
import org.jetbrains.kotlin.name.Name;
import org.jetbrains.kotlin.psi.*;
import org.jetbrains.kotlin.psi.psiUtil.PsiUtilsKt;
import org.jetbrains.kotlin.renderer.DescriptorRenderer;
import org.jetbrains.kotlin.resolve.BindingContext;
import org.jetbrains.kotlin.resolve.BindingTrace;
import org.jetbrains.kotlin.resolve.lazy.descriptors.AbstractLazyMemberScope;
import org.jetbrains.kotlin.resolve.lazy.descriptors.LazyPackageDescriptor;
import org.jetbrains.kotlin.resolve.scopes.MemberScope;
import org.jetbrains.kotlin.storage.LockBasedLazyResolveStorageManager;
import javax.inject.Inject;
import java.util.List;
public class LazyDeclarationResolver {
@NotNull private final TopLevelDescriptorProvider topLevelDescriptorProvider;
@NotNull private final AbsentDescriptorHandler absentDescriptorHandler;
@NotNull private final BindingTrace trace;
protected DeclarationScopeProvider scopeProvider;
// component dependency cycle
@Inject
public void setDeclarationScopeProvider(@NotNull DeclarationScopeProviderImpl scopeProvider) {
this.scopeProvider = scopeProvider;
}
@Deprecated
public LazyDeclarationResolver(
@NotNull GlobalContext globalContext,
@NotNull BindingTrace delegationTrace,
@NotNull TopLevelDescriptorProvider topLevelDescriptorProvider,
@NotNull AbsentDescriptorHandler absentDescriptorHandler
) {
this.topLevelDescriptorProvider = topLevelDescriptorProvider;
this.absentDescriptorHandler = absentDescriptorHandler;
LockBasedLazyResolveStorageManager lockBasedLazyResolveStorageManager =
new LockBasedLazyResolveStorageManager(globalContext.getStorageManager());
this.trace = lockBasedLazyResolveStorageManager.createSafeTrace(delegationTrace);
}
@NotNull
public ClassDescriptor getClassDescriptor(@NotNull KtClassOrObject classOrObject, @NotNull LookupLocation location) {
return findClassDescriptor(classOrObject, location);
}
@NotNull
public ScriptDescriptor getScriptDescriptor(@NotNull KtScript script, @NotNull LookupLocation location) {
return (ScriptDescriptor) findClassDescriptor(script, location);
}
@NotNull
private ClassDescriptor findClassDescriptor(
@NotNull KtNamedDeclaration classObjectOrScript,
@NotNull LookupLocation location
) {
MemberScope scope = getMemberScopeDeclaredIn(classObjectOrScript, location);
// Why not use the result here. Because it may be that there is a redeclaration:
// class A {} class A { fun foo(): A}
// and if we find the class by name only, we may b-not get the right one.
// This call is only needed to make sure the classes are written to trace
ClassifierDescriptor scopeDescriptor = scope.getContributedClassifier(classObjectOrScript.getNameAsSafeName(), location);
DeclarationDescriptor descriptor = getBindingContext().get(BindingContext.DECLARATION_TO_DESCRIPTOR, classObjectOrScript);
if (descriptor == null) {
String providerInfoString = null;
if (scope instanceof AbstractLazyMemberScope) {
AbstractLazyMemberScope lazyMemberScope = (AbstractLazyMemberScope) scope;
providerInfoString = lazyMemberScope.toProviderString();
}
throw new IllegalArgumentException(
String.format(
"Could not find a classifier for %s.\n" +
"Found descriptor: %s (%s).\n" +
"Scope: %s.\n" +
"Provider: %s.",
PsiUtilsKt.getElementTextWithContext(classObjectOrScript),
scopeDescriptor != null ? DescriptorRenderer.DEBUG_TEXT.render(scopeDescriptor) : "null",
scopeDescriptor != null ? (scopeDescriptor.getContainingDeclaration().getClass()) : null,
scope,
providerInfoString != null ? providerInfoString : "null"
)
);
}
return (ClassDescriptor) descriptor;
}
@NotNull
private BindingContext getBindingContext() {
return trace.getBindingContext();
}
@NotNull
public DeclarationDescriptor resolveToDescriptor(@NotNull KtDeclaration declaration) {
return resolveToDescriptor(declaration, /*track =*/true);
}
@NotNull
private DeclarationDescriptor resolveToDescriptor(@NotNull KtDeclaration declaration, boolean track) {
DeclarationDescriptor result = declaration.accept(new KtVisitor() {
@NotNull
private LookupLocation lookupLocationFor(@NotNull KtDeclaration declaration, boolean isTopLevel) {
return isTopLevel && track ? new KotlinLookupLocation(declaration) : NoLookupLocation.WHEN_RESOLVE_DECLARATION;
}
@Override
public DeclarationDescriptor visitClass(@NotNull KtClass klass, Void data) {
return getClassDescriptor(klass, lookupLocationFor(klass, klass.isTopLevel()));
}
@Override
public DeclarationDescriptor visitObjectDeclaration(@NotNull KtObjectDeclaration declaration, Void data) {
return getClassDescriptor(declaration, lookupLocationFor(declaration, declaration.isTopLevel()));
}
@Override
public DeclarationDescriptor visitTypeParameter(@NotNull KtTypeParameter parameter, Void data) {
KtTypeParameterListOwner ownerElement = PsiTreeUtil.getParentOfType(parameter, KtTypeParameterListOwner.class);
assert ownerElement != null : "Owner not found for type parameter: " + parameter.getText();
DeclarationDescriptor ownerDescriptor = resolveToDescriptor(ownerElement, /*track =*/false);
List typeParameters;
if (ownerDescriptor instanceof CallableDescriptor) {
CallableDescriptor callableDescriptor = (CallableDescriptor) ownerDescriptor;
typeParameters = callableDescriptor.getTypeParameters();
}
else if (ownerDescriptor instanceof ClassifierDescriptorWithTypeParameters) {
ClassifierDescriptorWithTypeParameters classifierDescriptor = (ClassifierDescriptorWithTypeParameters) ownerDescriptor;
typeParameters = classifierDescriptor.getTypeConstructor().getParameters();
}
else {
throw new IllegalStateException("Unknown owner kind for a type parameter: " + ownerDescriptor);
}
Name name = parameter.getNameAsSafeName();
for (TypeParameterDescriptor typeParameterDescriptor : typeParameters) {
if (typeParameterDescriptor.getName().equals(name)) {
return typeParameterDescriptor;
}
}
throw new IllegalStateException("Type parameter " + name + " not found for " + ownerDescriptor);
}
@Override
public DeclarationDescriptor visitNamedFunction(@NotNull KtNamedFunction function, Void data) {
LookupLocation location = lookupLocationFor(function, function.isTopLevel());
MemberScope scopeForDeclaration = getMemberScopeDeclaredIn(function, location);
scopeForDeclaration.getContributedFunctions(function.getNameAsSafeName(), location);
return getBindingContext().get(BindingContext.DECLARATION_TO_DESCRIPTOR, function);
}
@Override
public DeclarationDescriptor visitParameter(@NotNull KtParameter parameter, Void data) {
PsiElement grandFather = parameter.getParent().getParent();
if (grandFather instanceof KtPrimaryConstructor) {
KtClassOrObject jetClass = ((KtPrimaryConstructor) grandFather).getContainingClassOrObject();
// This is a primary constructor parameter
ClassDescriptor classDescriptor = getClassDescriptor(jetClass, lookupLocationFor(jetClass, false));
if (parameter.hasValOrVar()) {
classDescriptor.getDefaultType().getMemberScope().getContributedVariables(parameter.getNameAsSafeName(), lookupLocationFor(parameter, false));
return getBindingContext().get(BindingContext.PRIMARY_CONSTRUCTOR_PARAMETER, parameter);
}
else {
ConstructorDescriptor constructor = classDescriptor.getUnsubstitutedPrimaryConstructor();
assert constructor != null: "There are constructor parameters found, so a constructor should also exist";
constructor.getValueParameters();
return getBindingContext().get(BindingContext.VALUE_PARAMETER, parameter);
}
}
else if (grandFather instanceof KtNamedFunction) {
FunctionDescriptor function = (FunctionDescriptor) visitNamedFunction((KtNamedFunction) grandFather, data);
function.getValueParameters();
return getBindingContext().get(BindingContext.VALUE_PARAMETER, parameter);
}
else if (grandFather instanceof KtSecondaryConstructor) {
ConstructorDescriptor constructorDescriptor = (ConstructorDescriptor) visitSecondaryConstructor(
(KtSecondaryConstructor) grandFather, data
);
constructorDescriptor.getValueParameters();
return getBindingContext().get(BindingContext.VALUE_PARAMETER, parameter);
}
else {
//TODO: support parameters in accessors and other places(?)
return super.visitParameter(parameter, data);
}
}
@Override
public DeclarationDescriptor visitSecondaryConstructor(@NotNull KtSecondaryConstructor constructor, Void data) {
getClassDescriptor((KtClassOrObject) constructor.getParent().getParent(), lookupLocationFor(constructor, false)).getConstructors();
return getBindingContext().get(BindingContext.CONSTRUCTOR, constructor);
}
@Override
public DeclarationDescriptor visitPrimaryConstructor(@NotNull KtPrimaryConstructor constructor, Void data) {
getClassDescriptor(constructor.getContainingClassOrObject(), lookupLocationFor(constructor, false)).getConstructors();
return getBindingContext().get(BindingContext.CONSTRUCTOR, constructor);
}
@Override
public DeclarationDescriptor visitProperty(@NotNull KtProperty property, Void data) {
LookupLocation location = lookupLocationFor(property, property.isTopLevel());
MemberScope scopeForDeclaration = getMemberScopeDeclaredIn(property, location);
scopeForDeclaration.getContributedVariables(property.getNameAsSafeName(), location);
return getBindingContext().get(BindingContext.DECLARATION_TO_DESCRIPTOR, property);
}
@Override
public DeclarationDescriptor visitDestructuringDeclarationEntry(
@NotNull KtDestructuringDeclarationEntry destructuringDeclarationEntry, Void data
) {
LookupLocation location = lookupLocationFor(destructuringDeclarationEntry, false);
KtDestructuringDeclaration destructuringDeclaration = ((KtDestructuringDeclaration) destructuringDeclarationEntry.getParent());
MemberScope scopeForDeclaration = getMemberScopeDeclaredIn(destructuringDeclaration, location);
scopeForDeclaration.getContributedVariables(destructuringDeclarationEntry.getNameAsSafeName(), location);
return getBindingContext().get(BindingContext.DECLARATION_TO_DESCRIPTOR, destructuringDeclarationEntry);
}
@Override
public DeclarationDescriptor visitTypeAlias(@NotNull KtTypeAlias typeAlias, Void data) {
LookupLocation location = lookupLocationFor(typeAlias, typeAlias.isTopLevel());
MemberScope scopeForDeclaration = getMemberScopeDeclaredIn(typeAlias, location);
scopeForDeclaration.getContributedClassifier(typeAlias.getNameAsSafeName(), location);
return getBindingContext().get(BindingContext.DECLARATION_TO_DESCRIPTOR, typeAlias);
}
@Override
public DeclarationDescriptor visitScript(@NotNull KtScript script, Void data) {
return getScriptDescriptor(script, lookupLocationFor(script, true));
}
@Override
public DeclarationDescriptor visitKtElement(@NotNull KtElement element, Void data) {
throw new IllegalArgumentException("Unsupported declaration type: " + element + " " +
PsiUtilsKt.getElementTextWithContext(element));
}
}, null);
if (result == null) {
return absentDescriptorHandler.diagnoseDescriptorNotFound(declaration);
}
return result;
}
@NotNull
/*package*/ MemberScope getMemberScopeDeclaredIn(@NotNull KtDeclaration declaration, @NotNull LookupLocation location) {
KtDeclaration parentDeclaration = KtStubbedPsiUtil.getContainingDeclaration(declaration);
boolean isTopLevel = parentDeclaration == null;
if (isTopLevel) { // for top level declarations we search directly in package because of possible conflicts with imports
KtFile ktFile = (KtFile) declaration.getContainingFile();
FqName fqName = ktFile.getPackageFqName();
LazyPackageDescriptor packageDescriptor = topLevelDescriptorProvider.getPackageFragment(fqName);
if (packageDescriptor == null) {
if (topLevelDescriptorProvider instanceof LazyClassContext) {
((LazyClassContext) topLevelDescriptorProvider).getDeclarationProviderFactory().diagnoseMissingPackageFragment(ktFile);
}
else {
throw new IllegalStateException("Cannot find package fragment for file " + ktFile.getName() + " with package " + fqName);
}
}
return packageDescriptor.getMemberScope();
}
else {
if (parentDeclaration instanceof KtClassOrObject) {
return getClassDescriptor((KtClassOrObject) parentDeclaration, location).getUnsubstitutedMemberScope();
}
else if (parentDeclaration instanceof KtScript) {
return getScriptDescriptor((KtScript) parentDeclaration, location).getUnsubstitutedMemberScope();
}
else {
throw new IllegalStateException("Don't call this method for local declarations: " + declaration + "\n" +
PsiUtilsKt.getElementTextWithContext(declaration));
}
}
}
}
