avoid loading JavaPsiFacade for default project while decompiling class files

java/java-impl/src/com/intellij/psi/impl/source/codeStyle/JavaCodeStyleManagerImpl.java

@@ -1005,7 +1005,7 @@ public class JavaCodeStyleManagerImpl extends JavaCodeStyleManager {
   }
 
   private boolean isIdentifier(String name) {
-    return JavaPsiFacade.getInstance(myProject).getNameHelper().isIdentifier(name, LanguageLevel.HIGHEST);
+    return PsiNameHelper.getInstance(myProject).isIdentifier(name, LanguageLevel.HIGHEST);
   }
 
   private CodeStyleSettings getSettings() {

java/java-psi-api/src/com/intellij/psi/JavaPsiFacade.java

@@ -101,6 +101,7 @@ public abstract class JavaPsiFacade {
    * Returns the name helper for the project, which can be used to validate
    * and parse Java identifiers.
    *
+   * @deprecated use {@link com.intellij.psi.PsiNameHelper#getInstance(com.intellij.openapi.project.Project)}
    * @return the name helper instance.
    */
   @NotNull

java/java-psi-api/src/com/intellij/psi/PsiNameHelper.java

@@ -15,6 +15,8 @@
  */
 package com.intellij.psi;
 
+import com.intellij.openapi.components.ServiceManager;
+import com.intellij.openapi.project.Project;
 import com.intellij.pom.java.LanguageLevel;
 import com.intellij.psi.util.PsiTreeUtil;
 import com.intellij.util.ArrayUtil;
@@ -31,6 +33,11 @@ import static com.intellij.util.ObjectUtils.notNull;
  * @see com.intellij.psi.JavaPsiFacade#getNameHelper()
  */
 public abstract class PsiNameHelper {
+
+  public static PsiNameHelper getInstance(Project project) {
+    return ServiceManager.getService(project, PsiNameHelper.class);
+  }
+  
   /**
    * Checks if the specified text is a Java identifier, using the language level of the project
    * with which the name helper is associated to filter out keywords.

java/java-psi-impl/src/com/intellij/psi/impl/JavaPsiFacadeImpl.java

@@ -58,7 +58,6 @@ import java.util.concurrent.ConcurrentMap;
  */
 public class JavaPsiFacadeImpl extends JavaPsiFacadeEx {
   private volatile PsiElementFinder[] myElementFinders;
-  private final PsiNameHelper myNameHelper;
   private final PsiConstantEvaluationHelper myConstantEvaluationHelper;
   private volatile SoftReference<ConcurrentMap<String, PsiPackage>> myPackageCache;
   private final Project myProject;
@@ -70,7 +69,6 @@ public class JavaPsiFacadeImpl extends JavaPsiFacadeEx {
                            MessageBus bus) {
     myProject = project;
     myFileManager = javaFileManager;
-    myNameHelper = new PsiNameHelperImpl(this);
     myConstantEvaluationHelper = new PsiConstantEvaluationHelperImpl();
 
     final PsiModificationTracker modificationTracker = psiManager.getModificationTracker();
@@ -223,7 +221,7 @@ public class JavaPsiFacadeImpl extends JavaPsiFacadeEx {
   @Override
   @NotNull
   public PsiNameHelper getNameHelper() {
-    return myNameHelper;
+    return PsiNameHelper.getInstance(myProject);
   }
 
   @NotNull

java/java-psi-impl/src/com/intellij/psi/impl/PsiNameHelperImpl.java

@@ -16,10 +16,10 @@
 package com.intellij.psi.impl;
 
 import com.intellij.lang.java.lexer.JavaLexer;
+import com.intellij.openapi.project.Project;
 import com.intellij.openapi.roots.LanguageLevelProjectExtension;
 import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.pom.java.LanguageLevel;
-import com.intellij.psi.JavaPsiFacade;
 import com.intellij.psi.PsiNameHelper;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -27,8 +27,8 @@ import org.jetbrains.annotations.Nullable;
 public class PsiNameHelperImpl extends PsiNameHelper {
   private final LanguageLevelProjectExtension myLanguageLevelExtension;
 
-  public PsiNameHelperImpl(JavaPsiFacade manager) {
-    myLanguageLevelExtension = LanguageLevelProjectExtension.getInstance(manager.getProject());
+  public PsiNameHelperImpl(Project project) {
+    myLanguageLevelExtension = LanguageLevelProjectExtension.getInstance(project);
   }
 
   @Override

java/java-psi-impl/src/com/intellij/psi/impl/compiled/ClsTypeElementImpl.java

@@ -21,6 +21,7 @@ import com.intellij.openapi.util.NullableLazyValue;
 import com.intellij.openapi.util.VolatileNullableLazyValue;
 import com.intellij.psi.*;
 import com.intellij.psi.impl.PsiImplUtil;
+import com.intellij.psi.impl.PsiJavaParserFacadeImpl;
 import com.intellij.psi.impl.cache.TypeInfo;
 import com.intellij.psi.impl.source.PsiClassReferenceType;
 import com.intellij.psi.impl.source.tree.JavaElementType;
@@ -136,7 +137,7 @@ public class ClsTypeElementImpl extends ClsElementImpl implements PsiTypeElement
   }
 
   private ClsElementImpl calculateChild() {
-    if (JavaPsiFacade.getInstance(getProject()).getElementFactory().createPrimitiveType(myTypeText) != null) {
+    if (PsiJavaParserFacadeImpl.getPrimitiveType(myTypeText) != null) {
       return null;
     }
     else if (isArray()) {
@@ -153,7 +154,7 @@ public class ClsTypeElementImpl extends ClsElementImpl implements PsiTypeElement
   }
 
   private PsiType calculateType() {
-    PsiType result = JavaPsiFacade.getInstance(getProject()).getElementFactory().createPrimitiveType(myTypeText);
+    PsiType result = PsiJavaParserFacadeImpl.getPrimitiveType(myTypeText);
     if (result != null) return result;
 
     ClsElementImpl childElement = myChild.getValue();

resources/src/META-INF/IdeaPlugin.xml

@@ -357,6 +357,8 @@
                     serviceImplementation="com.intellij.ide.util.TreeClassChooserFactoryImpl"/>
     <projectService serviceInterface="com.intellij.psi.JavaPsiFacade"
                     serviceImplementation="com.intellij.psi.impl.JavaPsiFacadeImpl"/>
+    <projectService serviceInterface="com.intellij.psi.PsiNameHelper"
+                    serviceImplementation="com.intellij.psi.impl.PsiNameHelperImpl"/>
     <projectService serviceInterface="com.intellij.psi.impl.file.impl.JavaFileManager"
                     serviceImplementation="com.intellij.psi.impl.file.impl.JavaFileManagerImpl"/>
     <projectService serviceInterface="com.intellij.codeInsight.guess.GuessManager"