Example #1
0
 /**
  * @param strict if strict is true this method checks if the conflicting class which is imported
  *     is actually used in the file. If it isn't the on demand import can be overridden with an
  *     exact import for the fqName without breaking stuff.
  */
 private static boolean hasOnDemandImportConflict(
     @NotNull String fqName, @NotNull PsiJavaFile file, boolean strict) {
   final PsiImportList imports = file.getImportList();
   if (imports == null) {
     return false;
   }
   final PsiImportStatement[] importStatements = imports.getImportStatements();
   final String shortName = ClassUtil.extractClassName(fqName);
   final String packageName = ClassUtil.extractPackageName(fqName);
   for (final PsiImportStatement importStatement : importStatements) {
     if (!importStatement.isOnDemand()) {
       continue;
     }
     final PsiJavaCodeReferenceElement importReference = importStatement.getImportReference();
     if (importReference == null) {
       continue;
     }
     final String packageText = importReference.getText();
     if (packageText.equals(packageName)) {
       continue;
     }
     final PsiElement element = importReference.resolve();
     if (!(element instanceof PsiPackage)) {
       continue;
     }
     final PsiPackage aPackage = (PsiPackage) element;
     if (!strict && aPackage.containsClassNamed(shortName)) {
       return true;
     } else {
       final PsiClass[] classes = aPackage.findClassByShortName(shortName, file.getResolveScope());
       for (final PsiClass aClass : classes) {
         final String qualifiedClassName = aClass.getQualifiedName();
         if (qualifiedClassName == null || fqName.equals(qualifiedClassName)) {
           continue;
         }
         return containsConflictingReference(file, qualifiedClassName);
       }
     }
   }
   return hasJavaLangImportConflict(fqName, file);
 }
Example #2
0
  /**
   * Adds import if it is needed.
   *
   * @return false when the FQ-name have to be used in code (e.g. when conflicting imports already
   *     exist)
   */
  public boolean addImport(@NotNull PsiJavaFile file, @NotNull PsiClass refClass) {
    final JavaPsiFacade facade = JavaPsiFacade.getInstance(file.getProject());
    PsiElementFactory factory = facade.getElementFactory();
    PsiResolveHelper helper = facade.getResolveHelper();

    String className = refClass.getQualifiedName();
    if (className == null) return true;
    String packageName = getPackageOrClassName(className);
    String shortName = PsiNameHelper.getShortClassName(className);

    PsiClass conflictSingleRef = findSingleImportByShortName(file, shortName);
    if (conflictSingleRef != null) {
      return className.equals(conflictSingleRef.getQualifiedName());
    }

    PsiClass curRefClass = helper.resolveReferencedClass(shortName, file);
    if (file.getManager().areElementsEquivalent(refClass, curRefClass)) {
      return true;
    }

    boolean useOnDemand = true;
    if (packageName.length() == 0) {
      useOnDemand = false;
    }

    PsiElement conflictPackageRef = findImportOnDemand(file, packageName);
    if (conflictPackageRef != null) {
      useOnDemand = false;
    }

    List<PsiElement> classesToReimport = new ArrayList<PsiElement>();

    List<PsiJavaCodeReferenceElement> importRefs = getImportsFromPackage(file, packageName);
    if (useOnDemand) {
      if (mySettings.USE_SINGLE_CLASS_IMPORTS
          && importRefs.size() + 1 < mySettings.CLASS_COUNT_TO_USE_IMPORT_ON_DEMAND
          && !mySettings.PACKAGES_TO_USE_IMPORT_ON_DEMAND.contains(packageName)) {
        useOnDemand = false;
      }
      // name of class we try to import is the same as of the class defined in this file
      if (curRefClass != null) {
        useOnDemand = true;
      }
      // check conflicts
      if (useOnDemand) {
        PsiElement[] onDemandRefs = file.getOnDemandImports(false, true);
        if (onDemandRefs.length > 0) {
          PsiPackage aPackage = facade.findPackage(packageName);
          if (aPackage != null) {
            PsiDirectory[] dirs = aPackage.getDirectories();
            for (PsiDirectory dir : dirs) {
              PsiFile[] files = dir.getFiles(); // do not iterate classes - too slow when not loaded
              for (PsiFile aFile : files) {
                if (aFile instanceof PsiJavaFile) {
                  String name = aFile.getVirtualFile().getNameWithoutExtension();
                  for (PsiElement ref : onDemandRefs) {
                    String refName =
                        ref instanceof PsiClass
                            ? ((PsiClass) ref).getQualifiedName()
                            : ((PsiPackage) ref).getQualifiedName();
                    String conflictClassName = refName + "." + name;
                    GlobalSearchScope resolveScope = file.getResolveScope();
                    PsiClass conflictClass = facade.findClass(conflictClassName, resolveScope);
                    if (conflictClass != null && helper.isAccessible(conflictClass, file, null)) {
                      String conflictClassName2 = aPackage.getQualifiedName() + "." + name;
                      PsiClass conflictClass2 = facade.findClass(conflictClassName2, resolveScope);
                      if (conflictClass2 != null
                          && helper.isAccessible(conflictClass2, file, null)) {
                        if (ReferencesSearch.search(
                                    conflictClass, new LocalSearchScope(file), false)
                                .findFirst()
                            != null) {
                          classesToReimport.add(conflictClass);
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    }

    try {
      PsiImportList importList = file.getImportList();
      PsiImportStatement statement;
      if (useOnDemand) {
        statement = factory.createImportStatementOnDemand(packageName);
      } else {
        statement = factory.createImportStatement(refClass);
      }
      importList.add(statement);
      if (useOnDemand) {
        for (PsiJavaCodeReferenceElement ref : importRefs) {
          LOG.assertTrue(ref.getParent() instanceof PsiImportStatement);
          if (!ref.isValid()) continue; // todo[dsl] Q?
          classesToReimport.add(ref.resolve());
          PsiImportStatement importStatement = (PsiImportStatement) ref.getParent();
          importStatement.delete();
        }
      }

      for (PsiElement aClassesToReimport : classesToReimport) {
        PsiClass aClass = (PsiClass) aClassesToReimport;
        if (aClass != null) {
          addImport(file, aClass);
        }
      }
    } catch (IncorrectOperationException e) {
      LOG.error(e);
    }
    return true;
  }
Example #3
0
  @NotNull
  private static Set<String> findSingleImports(
      @NotNull final PsiJavaFile file,
      @NotNull String[] names,
      @NotNull final Set<String> onDemandImports,
      @NotNull Set<String> namesToImportStaticly) {
    final GlobalSearchScope resolveScope = file.getResolveScope();
    Set<String> namesToUseSingle = new THashSet<String>();
    final String thisPackageName = file.getPackageName();
    final Set<String> implicitlyImportedPackages =
        new THashSet<String>(Arrays.asList(file.getImplicitlyImportedPackages()));
    final PsiManager manager = file.getManager();
    for (String name : names) {
      String prefix = getPackageOrClassName(name);
      if (prefix.length() == 0) continue;
      final boolean isImplicitlyImported = implicitlyImportedPackages.contains(prefix);
      if (!onDemandImports.contains(prefix) && !isImplicitlyImported) continue;
      String shortName = PsiNameHelper.getShortClassName(name);

      String thisPackageClass =
          thisPackageName.length() > 0 ? thisPackageName + "." + shortName : shortName;
      if (JavaPsiFacade.getInstance(manager.getProject()).findClass(thisPackageClass, resolveScope)
          != null) {
        namesToUseSingle.add(name);
        continue;
      }
      if (!isImplicitlyImported) {
        String langPackageClass = JAVA_LANG_PACKAGE + "." + shortName; // TODO : JSP!
        if (JavaPsiFacade.getInstance(manager.getProject())
                .findClass(langPackageClass, resolveScope)
            != null) {
          namesToUseSingle.add(name);
          continue;
        }
      }
      for (String onDemandName : onDemandImports) {
        if (prefix.equals(onDemandName)) continue;
        if (namesToImportStaticly.contains(name)) {
          PsiClass aClass =
              JavaPsiFacade.getInstance(manager.getProject()).findClass(onDemandName, resolveScope);
          if (aClass != null) {
            PsiField field = aClass.findFieldByName(shortName, true);
            if (field != null && field.hasModifierProperty(PsiModifier.STATIC)) {
              namesToUseSingle.add(name);
            } else {
              PsiClass inner = aClass.findInnerClassByName(shortName, true);
              if (inner != null && inner.hasModifierProperty(PsiModifier.STATIC)) {
                namesToUseSingle.add(name);
              } else {
                PsiMethod[] methods = aClass.findMethodsByName(shortName, true);
                for (PsiMethod method : methods) {
                  if (method.hasModifierProperty(PsiModifier.STATIC)) {
                    namesToUseSingle.add(name);
                  }
                }
              }
            }
          }
        } else {
          PsiClass aClass =
              JavaPsiFacade.getInstance(manager.getProject())
                  .findClass(onDemandName + "." + shortName, resolveScope);
          if (aClass != null) {
            namesToUseSingle.add(name);
          }
        }
      }
    }
    return namesToUseSingle;
  }