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org.jetbrains.kotlin.asJava.finder.JavaElementFinder Maven / Gradle / Ivy
/*
* Copyright 2010-2016 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.asJava.finder;
import com.google.common.collect.Collections2;
import com.google.common.collect.Sets;
import com.intellij.openapi.extensions.Extensions;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.Condition;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.*;
import com.intellij.psi.search.GlobalSearchScope;
import com.intellij.psi.util.PsiUtilCore;
import com.intellij.util.SmartList;
import com.intellij.util.containers.ContainerUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.kotlin.asJava.LightClassGenerationSupport;
import org.jetbrains.kotlin.load.java.JvmAbi;
import org.jetbrains.kotlin.name.FqName;
import org.jetbrains.kotlin.name.FqNamesUtilKt;
import org.jetbrains.kotlin.psi.KtClass;
import org.jetbrains.kotlin.psi.KtClassOrObject;
import org.jetbrains.kotlin.psi.KtEnumEntry;
import org.jetbrains.kotlin.psi.KtFile;
import org.jetbrains.kotlin.resolve.jvm.KotlinFinderMarker;
import java.util.Collection;
import java.util.Comparator;
import java.util.List;
import java.util.Set;
import static org.jetbrains.kotlin.asJava.LightClassUtilsKt.toLightClass;
public class JavaElementFinder extends PsiElementFinder implements KotlinFinderMarker {
@NotNull
public static JavaElementFinder getInstance(@NotNull Project project) {
PsiElementFinder[] extensions = Extensions.getArea(project).getExtensionPoint(PsiElementFinder.EP_NAME).getExtensions();
for (PsiElementFinder extension : extensions) {
if (extension instanceof JavaElementFinder) {
return (JavaElementFinder) extension;
}
}
throw new IllegalStateException(JavaElementFinder.class.getSimpleName() + " is not found for project " + project);
}
private final Project project;
private final PsiManager psiManager;
private final LightClassGenerationSupport lightClassGenerationSupport;
public JavaElementFinder(
@NotNull Project project,
@NotNull LightClassGenerationSupport lightClassGenerationSupport
) {
this.project = project;
this.psiManager = PsiManager.getInstance(project);
this.lightClassGenerationSupport = lightClassGenerationSupport;
}
@Override
public PsiClass findClass(@NotNull String qualifiedName, @NotNull GlobalSearchScope scope) {
PsiClass[] allClasses = findClasses(qualifiedName, scope);
return allClasses.length > 0 ? allClasses[0] : null;
}
@NotNull
@Override
public PsiClass[] findClasses(@NotNull String qualifiedNameString, @NotNull GlobalSearchScope scope) {
if (!FqNamesUtilKt.isValidJavaFqName(qualifiedNameString)) {
return PsiClass.EMPTY_ARRAY;
}
List answer = new SmartList<>();
FqName qualifiedName = new FqName(qualifiedNameString);
findClassesAndObjects(qualifiedName, scope, answer);
answer.addAll(lightClassGenerationSupport.getFacadeClasses(qualifiedName, scope));
answer.addAll(lightClassGenerationSupport.getKotlinInternalClasses(qualifiedName, scope));
return sortByClasspath(answer, scope).toArray(new PsiClass[answer.size()]);
}
// Finds explicitly declared classes and objects, not package classes
// Also DefaultImpls classes of interfaces
private void findClassesAndObjects(FqName qualifiedName, GlobalSearchScope scope, List answer) {
findInterfaceDefaultImpls(qualifiedName, scope, answer);
Collection classOrObjectDeclarations =
lightClassGenerationSupport.findClassOrObjectDeclarations(qualifiedName, scope);
for (KtClassOrObject declaration : classOrObjectDeclarations) {
if (!(declaration instanceof KtEnumEntry)) {
PsiClass lightClass = toLightClass(declaration);
if (lightClass != null) {
answer.add(lightClass);
}
}
}
}
private void findInterfaceDefaultImpls(FqName qualifiedName, GlobalSearchScope scope, List answer) {
if (qualifiedName.isRoot()) return;
if (!qualifiedName.shortName().asString().equals(JvmAbi.DEFAULT_IMPLS_CLASS_NAME)) return;
for (KtClassOrObject classOrObject : lightClassGenerationSupport.findClassOrObjectDeclarations(qualifiedName.parent(), scope)) {
//NOTE: can't filter out more interfaces right away because decompiled declarations do not have member bodies
if (classOrObject instanceof KtClass && ((KtClass) classOrObject).isInterface()) {
PsiClass interfaceClass = toLightClass(classOrObject);
if (interfaceClass != null) {
PsiClass implsClass = interfaceClass.findInnerClassByName(JvmAbi.DEFAULT_IMPLS_CLASS_NAME, false);
if (implsClass != null) {
answer.add(implsClass);
}
}
}
}
}
@NotNull
@Override
public Set getClassNames(@NotNull PsiPackage psiPackage, @NotNull GlobalSearchScope scope) {
FqName packageFQN = new FqName(psiPackage.getQualifiedName());
Collection declarations = lightClassGenerationSupport.findClassOrObjectDeclarationsInPackage(packageFQN, scope);
Set answer = Sets.newHashSet();
answer.addAll(lightClassGenerationSupport.getFacadeNames(packageFQN, scope));
for (KtClassOrObject declaration : declarations) {
String name = declaration.getName();
if (name != null) {
answer.add(name);
}
}
return answer;
}
@Override
public PsiPackage findPackage(@NotNull String qualifiedNameString) {
if (!FqNamesUtilKt.isValidJavaFqName(qualifiedNameString)) {
return null;
}
FqName fqName = new FqName(qualifiedNameString);
// allScope() because the contract says that the whole project
GlobalSearchScope allScope = GlobalSearchScope.allScope(project);
if (lightClassGenerationSupport.packageExists(fqName, allScope)) {
return new KtLightPackage(psiManager, fqName, allScope);
}
return null;
}
@NotNull
@Override
public PsiPackage[] getSubPackages(@NotNull PsiPackage psiPackage, @NotNull GlobalSearchScope scope) {
FqName packageFQN = new FqName(psiPackage.getQualifiedName());
Collection subpackages = lightClassGenerationSupport.getSubPackages(packageFQN, scope);
Collection answer = Collections2.transform(subpackages, input -> new KtLightPackage(psiManager, input, scope));
return answer.toArray(new PsiPackage[answer.size()]);
}
@NotNull
@Override
public PsiClass[] getClasses(@NotNull PsiPackage psiPackage, @NotNull GlobalSearchScope scope) {
List answer = new SmartList<>();
FqName packageFQN = new FqName(psiPackage.getQualifiedName());
answer.addAll(lightClassGenerationSupport.getFacadeClassesInPackage(packageFQN, scope));
Collection declarations = lightClassGenerationSupport.findClassOrObjectDeclarationsInPackage(packageFQN, scope);
for (KtClassOrObject declaration : declarations) {
PsiClass aClass = toLightClass(declaration);
if (aClass != null) {
answer.add(aClass);
}
}
return sortByClasspath(answer, scope).toArray(new PsiClass[answer.size()]);
}
@Override
@NotNull
public PsiFile[] getPackageFiles(@NotNull PsiPackage psiPackage, @NotNull GlobalSearchScope scope) {
FqName packageFQN = new FqName(psiPackage.getQualifiedName());
Collection result = lightClassGenerationSupport.findFilesForPackage(packageFQN, scope);
return result.toArray(new PsiFile[result.size()]);
}
@Override
@Nullable
public Condition getPackageFilesFilter(@NotNull PsiPackage psiPackage, @NotNull GlobalSearchScope scope) {
return input -> {
if (!(input instanceof KtFile)) {
return true;
}
return psiPackage.getQualifiedName().equals(((KtFile) input).getPackageFqName().asString());
};
}
@NotNull
public static Comparator byClasspathComparator(@NotNull GlobalSearchScope searchScope) {
return (o1, o2) -> {
VirtualFile f1 = PsiUtilCore.getVirtualFile(o1);
VirtualFile f2 = PsiUtilCore.getVirtualFile(o2);
if (f1 == f2) return 0;
if (f1 == null) return -1;
if (f2 == null) return 1;
return searchScope.compare(f2, f1);
};
}
private static Collection sortByClasspath(@NotNull List classes, @NotNull GlobalSearchScope searchScope) {
if (classes.size() > 1) {
ContainerUtil.quickSort(classes, byClasspathComparator(searchScope));
}
return classes;
}
}
