Examples with BodyDeclaration org.eclipse.jdt.core.dom.BodyDeclaration used on opensource projects

Example 11 with BodyDeclaration

use of org.eclipse.jdt.core.dom.BodyDeclaration in project buck by facebook.

the class JavaFileParser method extractFeaturesFromJavaCode.

public JavaFileFeatures extractFeaturesFromJavaCode(String code) {
    // For now, we will harcode this. Ultimately, we probably want to make this configurable via
    // .buckconfig. For example, the Buck project itself is diligent about disallowing wildcard
    // imports, but the one exception is the Java code generated via Thrift in src-gen.
    final boolean shouldThrowForUnsupportedWildcardImport = false;
    final AtomicBoolean isPoisonedByUnsupportedWildcardImport = new AtomicBoolean(false);
    final CompilationUnit compilationUnit = makeCompilationUnitFromSource(code);
    final ImmutableSortedSet.Builder<String> providedSymbols = ImmutableSortedSet.naturalOrder();
    final ImmutableSortedSet.Builder<String> requiredSymbols = ImmutableSortedSet.naturalOrder();
    final ImmutableSortedSet.Builder<String> exportedSymbols = ImmutableSortedSet.naturalOrder();
    final ImmutableSortedSet.Builder<String> requiredSymbolsFromExplicitImports = ImmutableSortedSet.naturalOrder();
    compilationUnit.accept(new ASTVisitor() {

        @Nullable
        private String packageName;

        /** Maps simple name to fully-qualified name. */
        private Map<String, String> simpleImportedTypes = new HashMap<>();

        /**
       * Maps wildcard import prefixes, such as {@code "java.util"} to the types in the respective
       * package if a wildcard import such as {@code import java.util.*} is used.
       */
        private Map<String, ImmutableSet<String>> wildcardImports = new HashMap<>();

        @Override
        public boolean visit(PackageDeclaration node) {
            Preconditions.checkState(packageName == null, "There should be at most one package declaration");
            packageName = node.getName().getFullyQualifiedName();
            return false;
        }

        // providedSymbols
        @Override
        public boolean visit(TypeDeclaration node) {
            // Local classes can be declared inside of methods. Skip over these.
            if (node.getParent() instanceof TypeDeclarationStatement) {
                return true;
            }
            String fullyQualifiedName = getFullyQualifiedTypeName(node);
            if (fullyQualifiedName != null) {
                providedSymbols.add(fullyQualifiedName);
            }
            @SuppressWarnings("unchecked") List<Type> interfaceTypes = node.superInterfaceTypes();
            for (Type interfaceType : interfaceTypes) {
                tryAddType(interfaceType, DependencyType.EXPORTED);
            }
            Type superclassType = node.getSuperclassType();
            if (superclassType != null) {
                tryAddType(superclassType, DependencyType.EXPORTED);
            }
            return true;
        }

        @Override
        public boolean visit(EnumDeclaration node) {
            String fullyQualifiedName = getFullyQualifiedTypeName(node);
            if (fullyQualifiedName != null) {
                providedSymbols.add(fullyQualifiedName);
            }
            return true;
        }

        @Override
        public boolean visit(AnnotationTypeDeclaration node) {
            String fullyQualifiedName = getFullyQualifiedTypeName(node);
            if (fullyQualifiedName != null) {
                providedSymbols.add(fullyQualifiedName);
            }
            return true;
        }

        // requiredSymbols
        /**
       * Uses heuristics to try to figure out what type of QualifiedName this is. Returns a non-null
       * value if this is believed to be a reference that qualifies as a "required symbol"
       * relationship.
       */
        @Override
        public boolean visit(QualifiedName node) {
            QualifiedName ancestor = findMostQualifiedAncestor(node);
            ASTNode parent = ancestor.getParent();
            if (!(parent instanceof PackageDeclaration) && !(parent instanceof ImportDeclaration)) {
                String symbol = ancestor.getFullyQualifiedName();
                // lookup.
                if (CharMatcher.javaUpperCase().matches(symbol.charAt(0))) {
                    addTypeFromDotDelimitedSequence(symbol, DependencyType.REQUIRED);
                }
            }
            return false;
        }

        /**
       * @param expr could be "Example", "Example.field", "com.example.Example". Note it could also
       *     be a built-in type, such as "java.lang.Integer", in which case it will not be added to
       *     the set of required symbols.
       */
        private void addTypeFromDotDelimitedSequence(String expr, DependencyType dependencyType) {
            // check it against JAVA_LANG_TYPES.
            if (startsWithUppercaseChar(expr)) {
                int index = expr.indexOf('.');
                if (index >= 0) {
                    String leftmostComponent = expr.substring(0, index);
                    if (JAVA_LANG_TYPES.contains(leftmostComponent)) {
                        return;
                    }
                }
            }
            expr = qualifyWithPackageNameIfNecessary(expr);
            addSymbol(expr, dependencyType);
        }

        @Override
        public boolean visit(ImportDeclaration node) {
            String fullyQualifiedName = node.getName().getFullyQualifiedName();
            // third-party code. As such, we will tolerate these for some of the common cases.
            if (node.isOnDemand()) {
                ImmutableSet<String> value = SUPPORTED_WILDCARD_IMPORTS.get(fullyQualifiedName);
                if (value != null) {
                    wildcardImports.put(fullyQualifiedName, value);
                    return false;
                } else if (shouldThrowForUnsupportedWildcardImport) {
                    throw new RuntimeException(String.format("Use of wildcard 'import %s.*' makes it impossible to statically determine " + "required symbols in this file. Please enumerate explicit imports.", fullyQualifiedName));
                } else {
                    isPoisonedByUnsupportedWildcardImport.set(true);
                    return false;
                }
            }
            // Only worry about the dependency on the enclosing type.
            Optional<String> simpleName = getSimpleNameFromFullyQualifiedName(fullyQualifiedName);
            if (simpleName.isPresent()) {
                String name = simpleName.get();
                int index = fullyQualifiedName.indexOf("." + name);
                String enclosingType = fullyQualifiedName.substring(0, index + name.length() + 1);
                requiredSymbolsFromExplicitImports.add(enclosingType);
                simpleImportedTypes.put(name, enclosingType);
            } else {
                LOG.warn("Suspicious import lacks obvious enclosing type: %s", fullyQualifiedName);
                // The one example we have seen of this in the wild is
                // "org.whispersystems.curve25519.java.curve_sigs". In practice, we still need to add it
                // as a required symbol in this case.
                requiredSymbols.add(fullyQualifiedName);
            }
            return false;
        }

        @Override
        public boolean visit(MethodInvocation node) {
            if (node.getExpression() == null) {
                return true;
            }
            String receiver = node.getExpression().toString();
            if (looksLikeAType(receiver)) {
                addTypeFromDotDelimitedSequence(receiver, DependencyType.REQUIRED);
            }
            return true;
        }

        /** An annotation on a member with zero arguments. */
        @Override
        public boolean visit(MarkerAnnotation node) {
            DependencyType dependencyType = findDependencyTypeForAnnotation(node);
            addSimpleTypeName(node.getTypeName(), dependencyType);
            return true;
        }

        /** An annotation on a member with named arguments. */
        @Override
        public boolean visit(NormalAnnotation node) {
            DependencyType dependencyType = findDependencyTypeForAnnotation(node);
            addSimpleTypeName(node.getTypeName(), dependencyType);
            return true;
        }

        /** An annotation on a member with a single, unnamed argument. */
        @Override
        public boolean visit(SingleMemberAnnotation node) {
            DependencyType dependencyType = findDependencyTypeForAnnotation(node);
            addSimpleTypeName(node.getTypeName(), dependencyType);
            return true;
        }

        private DependencyType findDependencyTypeForAnnotation(Annotation annotation) {
            ASTNode parentNode = annotation.getParent();
            if (parentNode == null) {
                return DependencyType.REQUIRED;
            }
            if (parentNode instanceof BodyDeclaration) {
                // Note that BodyDeclaration is an abstract class. Its subclasses are things like
                // FieldDeclaration and MethodDeclaration. We want to be sure that an annotation on any
                // non-private declaration is considered an exported symbol.
                BodyDeclaration declaration = (BodyDeclaration) parentNode;
                int modifiers = declaration.getModifiers();
                if ((modifiers & Modifier.PRIVATE) == 0) {
                    return DependencyType.EXPORTED;
                }
            }
            return DependencyType.REQUIRED;
        }

        @Override
        public boolean visit(SimpleType node) {
            // This method is responsible for finding the overwhelming majority of the required symbols
            // in the AST.
            tryAddType(node, DependencyType.REQUIRED);
            return true;
        }

        // exportedSymbols
        @Override
        public boolean visit(MethodDeclaration node) {
            // Types from private method signatures need not be exported.
            if ((node.getModifiers() & Modifier.PRIVATE) != 0) {
                return true;
            }
            Type returnType = node.getReturnType2();
            if (returnType != null) {
                tryAddType(returnType, DependencyType.EXPORTED);
            }
            @SuppressWarnings("unchecked") List<SingleVariableDeclaration> params = node.parameters();
            for (SingleVariableDeclaration decl : params) {
                tryAddType(decl.getType(), DependencyType.EXPORTED);
            }
            @SuppressWarnings("unchecked") List<Type> exceptions = node.thrownExceptionTypes();
            for (Type exception : exceptions) {
                tryAddType(exception, DependencyType.EXPORTED);
            }
            return true;
        }

        @Override
        public boolean visit(FieldDeclaration node) {
            // Types from private fields need not be exported.
            if ((node.getModifiers() & Modifier.PRIVATE) == 0) {
                tryAddType(node.getType(), DependencyType.EXPORTED);
            }
            return true;
        }

        private void tryAddType(Type type, DependencyType dependencyType) {
            if (type.isSimpleType()) {
                SimpleType simpleType = (SimpleType) type;
                Name simpleTypeName = simpleType.getName();
                String simpleName = simpleTypeName.toString();
                // rather than simply required.
                if (!CharMatcher.javaUpperCase().matchesAllOf(simpleName) || (dependencyType == DependencyType.EXPORTED && simpleImportedTypes.containsKey(simpleName))) {
                    addSimpleTypeName(simpleTypeName, dependencyType);
                }
            } else if (type.isArrayType()) {
                ArrayType arrayType = (ArrayType) type;
                tryAddType(arrayType.getElementType(), dependencyType);
            } else if (type.isParameterizedType()) {
                ParameterizedType parameterizedType = (ParameterizedType) type;
                tryAddType(parameterizedType.getType(), dependencyType);
                @SuppressWarnings("unchecked") List<Type> argTypes = parameterizedType.typeArguments();
                for (Type argType : argTypes) {
                    tryAddType(argType, dependencyType);
                }
            }
        }

        private void addSimpleTypeName(Name simpleTypeName, DependencyType dependencyType) {
            String simpleName = simpleTypeName.toString();
            if (JAVA_LANG_TYPES.contains(simpleName)) {
                return;
            }
            String fullyQualifiedNameForSimpleName = simpleImportedTypes.get(simpleName);
            if (fullyQualifiedNameForSimpleName != null) {
                // May need to promote from required to exported in this case.
                if (dependencyType == DependencyType.EXPORTED) {
                    addSymbol(fullyQualifiedNameForSimpleName, DependencyType.EXPORTED);
                }
                return;
            }
            // the iterator most of the time.
            if (!wildcardImports.isEmpty()) {
                for (Map.Entry<String, ImmutableSet<String>> entry : wildcardImports.entrySet()) {
                    Set<String> types = entry.getValue();
                    if (types.contains(simpleName)) {
                        String packageName = entry.getKey();
                        addSymbol(packageName + "." + simpleName, dependencyType);
                        return;
                    }
                }
            }
            String symbol = simpleTypeName.getFullyQualifiedName();
            symbol = qualifyWithPackageNameIfNecessary(symbol);
            addSymbol(symbol, dependencyType);
        }

        private void addSymbol(String symbol, DependencyType dependencyType) {
            ((dependencyType == DependencyType.REQUIRED) ? requiredSymbols : exportedSymbols).add(symbol);
        }

        private String qualifyWithPackageNameIfNecessary(String symbol) {
            if (!startsWithUppercaseChar(symbol)) {
                return symbol;
            }
            // If the symbol starts with a capital letter, then we assume that it is a reference to
            // a type in the same package.
            int index = symbol.indexOf('.');
            if (index >= 0) {
                symbol = symbol.substring(0, index);
            }
            if (packageName != null) {
                symbol = packageName + "." + symbol;
            }
            return symbol;
        }
    });
    // TODO(bolinfest): Special treatment for exportedSymbols when poisoned by wildcard import.
    ImmutableSortedSet<String> totalExportedSymbols = exportedSymbols.build();
    // If we were poisoned by an unsupported wildcard import, then we should rely exclusively on
    // the explicit imports to determine the required symbols.
    Set<String> totalRequiredSymbols = new HashSet<>();
    if (isPoisonedByUnsupportedWildcardImport.get()) {
        totalRequiredSymbols.addAll(requiredSymbolsFromExplicitImports.build());
    } else {
        totalRequiredSymbols.addAll(requiredSymbolsFromExplicitImports.build());
        totalRequiredSymbols.addAll(requiredSymbols.build());
    }
    // Make sure that required and exported symbols are disjoint sets.
    totalRequiredSymbols.removeAll(totalExportedSymbols);
    return new JavaFileFeatures(providedSymbols.build(), ImmutableSortedSet.copyOf(totalRequiredSymbols), totalExportedSymbols);
}

Example 12 with BodyDeclaration

use of org.eclipse.jdt.core.dom.BodyDeclaration in project che by eclipse.

the class ConvertAnonymousToNestedRefactoring method updateAndMoveBodyDeclarations.

private void updateAndMoveBodyDeclarations(CompilationUnitRewrite rewriter, IVariableBinding[] bindings, String[] fieldNames, List<BodyDeclaration> newBodyDeclarations, MethodDeclaration newConstructorDecl) {
    final ASTRewrite astRewrite = rewriter.getASTRewrite();
    final AST ast = astRewrite.getAST();
    final boolean useThisAccess = useThisForFieldAccess();
    int fieldInsertIndex = newConstructorDecl != null ? newBodyDeclarations.lastIndexOf(newConstructorDecl) : newBodyDeclarations.size();
    for (Iterator<BodyDeclaration> iterator = fAnonymousInnerClassNode.bodyDeclarations().iterator(); iterator.hasNext(); ) {
        BodyDeclaration body = iterator.next();
        for (int i = 0; i < bindings.length; i++) {
            SimpleName[] names = LinkedNodeFinder.findByBinding(body, bindings[i]);
            String fieldName = fieldNames[i];
            for (int k = 0; k < names.length; k++) {
                SimpleName newNode = ast.newSimpleName(fieldName);
                if (useThisAccess) {
                    FieldAccess access = ast.newFieldAccess();
                    access.setExpression(ast.newThisExpression());
                    access.setName(newNode);
                    astRewrite.replace(names[k], access, null);
                } else {
                    astRewrite.replace(names[k], newNode, null);
                }
                addLinkedPosition(KEY_FIELD_NAME_EXT + i, newNode, astRewrite, false);
            }
        }
        if (body instanceof Initializer || body instanceof FieldDeclaration) {
            newBodyDeclarations.add(fieldInsertIndex++, (BodyDeclaration) astRewrite.createMoveTarget(body));
        } else {
            newBodyDeclarations.add((BodyDeclaration) astRewrite.createMoveTarget(body));
        }
    }
    if (newConstructorDecl != null) {
        // move initialization of existing fields to constructor if an outer is referenced
        List<Statement> bodyStatements = newConstructorDecl.getBody().statements();
        List<VariableDeclarationFragment> fieldsToInitializeInConstructor = getFieldsToInitializeInConstructor();
        for (Iterator<VariableDeclarationFragment> iter = fieldsToInitializeInConstructor.iterator(); iter.hasNext(); ) {
            VariableDeclarationFragment fragment = iter.next();
            Expression initializer = fragment.getInitializer();
            Expression replacement = (Expression) astRewrite.get(fragment, VariableDeclarationFragment.INITIALIZER_PROPERTY);
            if (replacement == initializer) {
                replacement = (Expression) astRewrite.createMoveTarget(initializer);
            }
            astRewrite.remove(initializer, null);
            SimpleName fieldNameNode = ast.newSimpleName(fragment.getName().getIdentifier());
            bodyStatements.add(newFieldAssignment(ast, fieldNameNode, replacement, useThisAccess));
        }
    }
}

Example 13 with BodyDeclaration

use of org.eclipse.jdt.core.dom.BodyDeclaration in project che by eclipse.

the class ConvertAnonymousToNestedRefactoring method createNewNestedClass.

private AbstractTypeDeclaration createNewNestedClass(CompilationUnitRewrite rewrite, ITypeBinding[] typeParameters) throws CoreException {
    final AST ast = fAnonymousInnerClassNode.getAST();
    final TypeDeclaration newDeclaration = ast.newTypeDeclaration();
    newDeclaration.setInterface(false);
    newDeclaration.setJavadoc(null);
    newDeclaration.modifiers().addAll(ASTNodeFactory.newModifiers(ast, createModifiersForNestedClass()));
    newDeclaration.setName(ast.newSimpleName(fClassName));
    TypeParameter parameter = null;
    for (int index = 0; index < typeParameters.length; index++) {
        parameter = ast.newTypeParameter();
        parameter.setName(ast.newSimpleName(typeParameters[index].getName()));
        newDeclaration.typeParameters().add(parameter);
    }
    setSuperType(newDeclaration);
    IJavaProject project = fCu.getJavaProject();
    IVariableBinding[] bindings = getUsedLocalVariables();
    ArrayList<String> fieldNames = new ArrayList<String>();
    for (int i = 0; i < bindings.length; i++) {
        String name = StubUtility.getBaseName(bindings[i], project);
        String[] fieldNameProposals = StubUtility.getVariableNameSuggestions(NamingConventions.VK_INSTANCE_FIELD, project, name, 0, fieldNames, true);
        fieldNames.add(fieldNameProposals[0]);
        if (fLinkedProposalModel != null) {
            LinkedProposalPositionGroup positionGroup = fLinkedProposalModel.getPositionGroup(KEY_FIELD_NAME_EXT + i, true);
            for (int k = 0; k < fieldNameProposals.length; k++) {
                positionGroup.addProposal(fieldNameProposals[k], null, fieldNameProposals.length - k);
            }
        }
    }
    String[] allFieldNames = fieldNames.toArray(new String[fieldNames.size()]);
    List<BodyDeclaration> newBodyDeclarations = newDeclaration.bodyDeclarations();
    createFieldsForAccessedLocals(rewrite, bindings, allFieldNames, newBodyDeclarations);
    MethodDeclaration newConstructorDecl = createNewConstructor(rewrite, bindings, allFieldNames);
    if (newConstructorDecl != null) {
        newBodyDeclarations.add(newConstructorDecl);
    }
    updateAndMoveBodyDeclarations(rewrite, bindings, allFieldNames, newBodyDeclarations, newConstructorDecl);
    if (doAddComments()) {
        String[] parameterNames = new String[typeParameters.length];
        for (int index = 0; index < parameterNames.length; index++) {
            parameterNames[index] = typeParameters[index].getName();
        }
        String string = CodeGeneration.getTypeComment(rewrite.getCu(), fClassName, parameterNames, StubUtility.getLineDelimiterUsed(fCu));
        if (string != null) {
            Javadoc javadoc = (Javadoc) rewrite.getASTRewrite().createStringPlaceholder(string, ASTNode.JAVADOC);
            newDeclaration.setJavadoc(javadoc);
        }
    }
    if (fLinkedProposalModel != null) {
        addLinkedPosition(KEY_TYPE_NAME, newDeclaration.getName(), rewrite.getASTRewrite(), false);
        ModifierCorrectionSubProcessor.installLinkedVisibilityProposals(fLinkedProposalModel, rewrite.getASTRewrite(), newDeclaration.modifiers(), false);
    }
    return newDeclaration;
}

Example 14 with BodyDeclaration

use of org.eclipse.jdt.core.dom.BodyDeclaration in project che by eclipse.

the class SurroundWithAnalyzer method endVisit.

@Override
public void endVisit(CompilationUnit node) {
    postProcessSelectedNodes(internalGetSelectedNodes());
    BodyDeclaration enclosingNode = null;
    superCall: {
        if (getStatus().hasFatalError())
            break superCall;
        if (!hasSelectedNodes()) {
            ASTNode coveringNode = getLastCoveringNode();
            if (coveringNode instanceof Block) {
                Block block = (Block) coveringNode;
                Message[] messages = ASTNodes.getMessages(block, ASTNodes.NODE_ONLY);
                if (messages.length > 0) {
                    invalidSelection(RefactoringCoreMessages.SurroundWithTryCatchAnalyzer_compile_errors, JavaStatusContext.create(getCompilationUnit(), block));
                    break superCall;
                }
            }
            invalidSelection(RefactoringCoreMessages.SurroundWithTryCatchAnalyzer_doesNotCover);
            break superCall;
        }
        enclosingNode = (BodyDeclaration) ASTNodes.getParent(getFirstSelectedNode(), BodyDeclaration.class);
        if (!(enclosingNode instanceof MethodDeclaration) && !(enclosingNode instanceof Initializer)) {
            invalidSelection(RefactoringCoreMessages.SurroundWithTryCatchAnalyzer_doesNotContain);
            break superCall;
        }
        if (!onlyStatements()) {
            invalidSelection(RefactoringCoreMessages.SurroundWithTryCatchAnalyzer_onlyStatements);
        }
        fLocals = LocalDeclarationAnalyzer.perform(enclosingNode, getSelection());
    }
    super.endVisit(node);
}

Example 15 with BodyDeclaration

use of org.eclipse.jdt.core.dom.BodyDeclaration in project che by eclipse.

the class ExtractMethodRefactoring method checkFinalConditions.

/* (non-Javadoc)
	 * Method declared in Refactoring
	 */
@Override
public RefactoringStatus checkFinalConditions(IProgressMonitor pm) throws CoreException {
    pm.beginTask(RefactoringCoreMessages.ExtractMethodRefactoring_checking_new_name, 2);
    pm.subTask(EMPTY);
    RefactoringStatus result = checkMethodName();
    result.merge(checkParameterNames());
    result.merge(checkVarargOrder());
    pm.worked(1);
    if (pm.isCanceled())
        throw new OperationCanceledException();
    BodyDeclaration node = fAnalyzer.getEnclosingBodyDeclaration();
    if (node != null) {
        fAnalyzer.checkInput(result, fMethodName, fDestination);
        pm.worked(1);
    }
    pm.done();
    return result;
}