Fixing ClassCastException in Java15APIUsageInspection while casting IncreaseLanguageLevelFix to LocalQuickFix.

Author: unv-unv

java-analysis-impl/src/main/java/com/intellij/java/analysis/impl/codeInsight/daemon/impl/analysis/IncreaseLanguageLevelFix.java

@@ -18,13 +18,15 @@
 import com.intellij.java.language.LanguageLevel;
 import com.intellij.java.language.impl.projectRoots.JavaSdkVersionUtil;
 import com.intellij.java.language.projectRoots.JavaSdkVersion;
-import consulo.annotation.access.RequiredReadAction;
 import consulo.codeEditor.Editor;
 import consulo.content.bundle.Sdk;
 import consulo.java.language.module.extension.JavaModuleExtension;
 import consulo.java.language.module.extension.JavaMutableModuleExtension;
+import consulo.language.editor.inspection.LocalQuickFix;
+import consulo.language.editor.inspection.ProblemDescriptor;
 import consulo.language.editor.intention.SyntheticIntentionAction;
 import consulo.language.editor.localize.CodeInsightLocalize;
+import consulo.language.psi.PsiElement;
 import consulo.language.psi.PsiFile;
 import consulo.language.util.IncorrectOperationException;
 import consulo.language.util.ModuleUtilCore;
@@ -42,70 +44,85 @@
 /**
  * @author cdr
  */
-public class IncreaseLanguageLevelFix implements SyntheticIntentionAction {
-  private static final Logger LOG = Logger.getInstance(IncreaseLanguageLevelFix.class);
-
-  private final LanguageLevel myLevel;
-
-  public IncreaseLanguageLevelFix(LanguageLevel targetLevel) {
-    myLevel = targetLevel;
-  }
-
-  @Override
-  @Nonnull
-  public LocalizeValue getText() {
-    return CodeInsightLocalize.setLanguageLevelTo0(myLevel.getDescription().get());
-  }
-
-  private static boolean isJdkSupportsLevel(@Nullable final Sdk jdk, final LanguageLevel level) {
-    if (jdk == null) return true;
-    JavaSdkVersion version = JavaSdkVersionUtil.getJavaSdkVersion(jdk);
-    JavaSdkVersion required = JavaSdkVersion.fromLanguageLevel(level);
-    return version != null && (level.isPreview() ? version.equals(required) : version.isAtLeast(required));
-  }
-
-  @Override
-  public boolean isAvailable(@Nonnull final Project project, final Editor editor, final PsiFile file) {
-    final VirtualFile virtualFile = file.getVirtualFile();
-    if (virtualFile == null) {
-      return false;
+public class IncreaseLanguageLevelFix implements SyntheticIntentionAction, LocalQuickFix {
+    private static final Logger LOG = Logger.getInstance(IncreaseLanguageLevelFix.class);
+
+    private final LanguageLevel myLevel;
+
+    public IncreaseLanguageLevelFix(LanguageLevel targetLevel) {
+        myLevel = targetLevel;
+    }
+
+    @Nonnull
+    @Override
+    public LocalizeValue getText() {
+        return CodeInsightLocalize.setLanguageLevelTo0(myLevel.getDescription().get());
     }
 
-    final Module module = ModuleUtilCore.findModuleForFile(virtualFile, project);
-    return module != null && isLanguageLevelAcceptable(module, myLevel);
-  }
-
-  public static boolean isLanguageLevelAcceptable(Module module, final LanguageLevel level) {
-    return isJdkSupportsLevel(ModuleUtilCore.getSdk(module, JavaModuleExtension.class), level);
-  }
-
-  @Override
-  @RequiredUIAccess
-  public void invoke(@Nonnull final Project project, final Editor editor, final PsiFile file) throws IncorrectOperationException {
-    final VirtualFile virtualFile = file.getVirtualFile();
-    LOG.assertTrue(virtualFile != null);
-    final Module module = ModuleUtilCore.findModuleForFile(virtualFile, project);
-    if (module == null) {
-      return;
+    @Nonnull
+    @Override
+    public LocalizeValue getName() {
+        return getText();
     }
 
-    JavaModuleExtension extension = ModuleUtilCore.getExtension(module, JavaModuleExtension.class);
-    if (extension == null) {
-      return;
+    @Override
+    @RequiredUIAccess
+    public void applyFix(@Nonnull Project project, @Nonnull ProblemDescriptor descriptor) {
+        PsiElement element = descriptor.getPsiElement();
+        invoke(project, null, element.getContainingFile());
     }
 
-    final ModifiableRootModel rootModel = ModuleRootManager.getInstance(module).getModifiableModel();
-    JavaMutableModuleExtension mutableModuleExtension = rootModel.getExtension(JavaMutableModuleExtension.class);
+    private static boolean isJdkSupportsLevel(@Nullable Sdk jdk, LanguageLevel level) {
+        if (jdk == null) {
+            return true;
+        }
+        JavaSdkVersion version = JavaSdkVersionUtil.getJavaSdkVersion(jdk);
+        JavaSdkVersion required = JavaSdkVersion.fromLanguageLevel(level);
+        return version != null && (level.isPreview() ? version.equals(required) : version.isAtLeast(required));
+    }
+
+    @Override
+    public boolean isAvailable(@Nonnull Project project, Editor editor, PsiFile file) {
+        VirtualFile virtualFile = file.getVirtualFile();
+        if (virtualFile == null) {
+            return false;
+        }
 
-    assert mutableModuleExtension != null;
+        Module module = ModuleUtilCore.findModuleForFile(virtualFile, project);
+        return module != null && isLanguageLevelAcceptable(module, myLevel);
+    }
 
-    mutableModuleExtension.getInheritableLanguageLevel().set(null, myLevel.getName());
+    public static boolean isLanguageLevelAcceptable(Module module, LanguageLevel level) {
+        return isJdkSupportsLevel(ModuleUtilCore.getSdk(module, JavaModuleExtension.class), level);
+    }
 
-    project.getApplication().runWriteAction(rootModel::commit);
-  }
+    @Override
+    @RequiredUIAccess
+    public void invoke(@Nonnull Project project, Editor editor, PsiFile file) throws IncorrectOperationException {
+        VirtualFile virtualFile = file.getVirtualFile();
+        LOG.assertTrue(virtualFile != null);
+        Module module = ModuleUtilCore.findModuleForFile(virtualFile, project);
+        if (module == null) {
+            return;
+        }
 
-  @Override
-  public boolean startInWriteAction() {
-    return false;
-  }
+        JavaModuleExtension extension = ModuleUtilCore.getExtension(module, JavaModuleExtension.class);
+        if (extension == null) {
+            return;
+        }
+
+        ModifiableRootModel rootModel = ModuleRootManager.getInstance(module).getModifiableModel();
+        JavaMutableModuleExtension mutableModuleExtension = rootModel.getExtension(JavaMutableModuleExtension.class);
+
+        assert mutableModuleExtension != null;
+
+        mutableModuleExtension.getInheritableLanguageLevel().set(null, myLevel.getName());
+
+        project.getApplication().runWriteAction(rootModel::commit);
+    }
+
+    @Override
+    public boolean startInWriteAction() {
+        return false;
+    }
 }