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PsiUtil.java
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PsiUtil.java
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/*
* Copyright 2000-2015 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.idea.devkit.util;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.roots.ProjectRootManager;
import com.intellij.openapi.util.Key;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.*;
import com.intellij.psi.search.GlobalSearchScope;
import com.intellij.psi.search.GlobalSearchScopesCore;
import com.intellij.psi.util.CachedValueProvider;
import com.intellij.psi.util.CachedValuesManager;
import com.intellij.ui.components.JBList;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.annotations.TestOnly;
/**
* @author Konstantin Bulenkov
*/
public class PsiUtil {
private static final Key<Boolean> IDEA_PROJECT = Key.create("idea.internal.inspections.enabled");
private static final String IDE_PROJECT_MARKER_CLASS = JBList.class.getName();
private PsiUtil() { }
public static boolean isInstantiable(@NotNull PsiClass cls) {
PsiModifierList modList = cls.getModifierList();
if (modList == null || cls.isInterface() || modList.hasModifierProperty(PsiModifier.ABSTRACT) || !isPublicOrStaticInnerClass(cls)) {
return false;
}
PsiMethod[] constructors = cls.getConstructors();
if (constructors.length == 0) return true;
for (PsiMethod constructor : constructors) {
if (constructor.getParameterList().getParameters().length == 0
&& constructor.hasModifierProperty(PsiModifier.PUBLIC)) {
return true;
}
}
return false;
}
public static boolean isPublicOrStaticInnerClass(@NotNull PsiClass cls) {
PsiModifierList modifiers = cls.getModifierList();
if (modifiers == null) return false;
return modifiers.hasModifierProperty(PsiModifier.PUBLIC) &&
(cls.getParent() instanceof PsiFile || modifiers.hasModifierProperty(PsiModifier.STATIC));
}
@Nullable
public static String getReturnedLiteral(PsiMethod method, PsiClass cls) {
PsiExpression value = getReturnedExpression(method);
if (value instanceof PsiLiteralExpression) {
Object str = ((PsiLiteralExpression)value).getValue();
return str == null ? null : str.toString();
}
else if (value instanceof PsiMethodCallExpression) {
if (isSimpleClassNameExpression((PsiMethodCallExpression)value)) {
return cls.getName();
}
}
return null;
}
private static boolean isSimpleClassNameExpression(PsiMethodCallExpression expr) {
String text = expr.getText();
if (text == null) return false;
text = text.replaceAll(" ", "")
.replaceAll("\n", "")
.replaceAll("\t", "")
.replaceAll("\r", "");
return "getClass().getSimpleName()".equals(text) || "this.getClass().getSimpleName()".equals(text);
}
@Nullable
public static PsiExpression getReturnedExpression(PsiMethod method) {
PsiCodeBlock body = method.getBody();
if (body != null) {
PsiStatement[] statements = body.getStatements();
if (statements.length == 1 && statements[0] instanceof PsiReturnStatement) {
PsiExpression value = ((PsiReturnStatement)statements[0]).getReturnValue();
if (value instanceof PsiReferenceExpression) {
PsiElement element = ((PsiReferenceExpression)value).resolve();
if (element instanceof PsiField) {
PsiField field = (PsiField)element;
if (field.hasModifierProperty(PsiModifier.FINAL)) {
return field.getInitializer();
}
}
}
return value;
}
}
return null;
}
@Nullable
public static PsiMethod findNearestMethod(String name, @Nullable PsiClass cls) {
if (cls == null) return null;
for (PsiMethod method : cls.getMethods()) {
if (method.getParameterList().getParametersCount() == 0 && method.getName().equals(name)) {
return method.getModifierList().hasModifierProperty(PsiModifier.ABSTRACT) ? null : method;
}
}
return findNearestMethod(name, cls.getSuperClass());
}
public static boolean isIdeaProject(@Nullable Project project) {
if (project == null) return false;
Boolean flag = project.getUserData(IDEA_PROJECT);
if (flag == null) {
flag = checkIdeaProject(project);
project.putUserData(IDEA_PROJECT, flag);
}
return flag;
}
public static boolean isPluginProject(final Project project) {
return CachedValuesManager.getManager(project).getCachedValue(project, new CachedValueProvider<Boolean>() {
@Nullable
@Override
public Result<Boolean> compute() {
boolean foundMarkerClass =
JavaPsiFacade.getInstance(project).findClass(IDE_PROJECT_MARKER_CLASS,
GlobalSearchScope.allScope(project)) != null;
return Result.createSingleDependency(foundMarkerClass, ProjectRootManager.getInstance(project));
}
});
}
private static boolean isIntelliJBasedDir(VirtualFile baseDir) {
if (baseDir == null) {
return false;
}
for (VirtualFile dir : new VirtualFile[]{baseDir, baseDir.findChild("community")}) {
if (dir == null || !dir.isDirectory()) {
continue;
}
if (dir.findChild("idea.iml") != null || dir.findChild("community-main.iml") != null) {
return true;
}
}
return false;
}
@TestOnly
public static void markAsIdeaProject(@NotNull Project project, boolean value) {
project.putUserData(IDEA_PROJECT, value);
}
private static boolean checkIdeaProject(@NotNull Project project) {
if (!isIntelliJBasedDir(project.getBaseDir())) {
return false;
}
GlobalSearchScope scope = GlobalSearchScopesCore.projectProductionScope(project);
if (JavaPsiFacade.getInstance(project).findClass(IDE_PROJECT_MARKER_CLASS, scope) == null) {
return false;
}
return true;
}
@NotNull
public static <E extends PsiElement> SmartPsiElementPointer<E> createPointer(@NotNull E e) {
return SmartPointerManager.getInstance(e.getProject()).createSmartPsiElementPointer(e);
}
}