Java Code Examples for org.eclipse.jdt.core.dom.ASTParser#createAST()

/**
 * Parse the routeFile given while building the instance and fill the model.
 * @param model The EIP Model to fill with parsed elements from routeFile.
 * @throws InvalidArgumentException if given file is not a valid Spring integration file
 */
public void parseAndFillModel(EIPModel model) throws Exception {
   // Read source content.
   routeSource = parseRouteClass();
   
   // Parse and get the compilation unit.
   ASTParser parser = ASTParser.newParser(AST.JLS8);
   parser.setKind(ASTParser.K_COMPILATION_UNIT);
   parser.setSource(routeSource.toCharArray());
   parser.setResolveBindings(false);
   routeCU = (CompilationUnit) parser.createAST(null);
   
   // Visit and build a comment map before parsing.
   for (Object comment : routeCU.getCommentList()) {
      ((Comment) comment).accept(this);
   }
   
   // Initialize and build a route.
   route = EipFactory.eINSTANCE.createRoute();
   model.getOwnedRoutes().add(route);
   
   // 
   routeCU.accept(this);
}
 

@SuppressWarnings("unchecked")
public Javadoc getJavaDoc() {
	if (context == null || context.eResource() == null || context.eResource().getResourceSet() == null)
		return null;
	Object classpathURIContext = ((XtextResourceSet) context.eResource().getResourceSet()).getClasspathURIContext();
	if (classpathURIContext instanceof IJavaProject) {
		IJavaProject javaProject = (IJavaProject) classpathURIContext;
		@SuppressWarnings("all")
		ASTParser parser = ASTParser.newParser(AST.JLS3);
		parser.setProject(javaProject);
		Map<String, String> options = javaProject.getOptions(true);
		options.put(JavaCore.COMPILER_DOC_COMMENT_SUPPORT, JavaCore.ENABLED); // workaround for https://bugs.eclipse.org/bugs/show_bug.cgi?id=212207
		parser.setCompilerOptions(options);
		String source = rawJavaDoc + "class C{}"; //$NON-NLS-1$
		parser.setSource(source.toCharArray());
		CompilationUnit root = (CompilationUnit) parser.createAST(null);
		if (root == null)
			return null;
		List<AbstractTypeDeclaration> types = root.types();
		if (types.size() != 1)
			return null;
		AbstractTypeDeclaration type = types.get(0);
		return type.getJavadoc();
	}
	return null;
}
 

protected static void dumpJava(final String content) {
	final ASTParser parser = ASTParser.newParser(astLevel);
	parser.setKind(ASTParser.K_COMPILATION_UNIT);
	parser.setSource(content.toCharArray());

	final Map<?, ?> options = JavaCore.getOptions();
	JavaCore.setComplianceOptions(javaVersion, options);
	parser.setCompilerOptions(options);

	final CompilationUnit cu = (CompilationUnit) parser.createAST(null);

	try {
		final UglyMathCommentsExtractor cex = new UglyMathCommentsExtractor(cu, content);
		final ASTDumper dumper = new ASTDumper(cex);
		dumper.dump(cu);
		cex.close();
	} catch (final Exception e) {}
}
 

private CompilationUnit makeCompilationUnitFromSource(String code) {
  ASTParser parser = ASTParser.newParser(jlsLevel);
  parser.setSource(code.toCharArray());
  parser.setKind(ASTParser.K_COMPILATION_UNIT);

  Map<String, String> options = JavaCore.getOptions();
  JavaCore.setComplianceOptions(javaVersion, options);
  parser.setCompilerOptions(options);

  return (CompilationUnit) parser.createAST(/* monitor */ null);
}
 

private Expression createExpression(String expr) {
	ASTParser parser = ASTParser.newParser(AST.JLS8);
	parser.setKind(ASTParser.K_EXPRESSION);
	parser.setResolveBindings(true);
	parser.setSource(expr.toCharArray());
	
	org.eclipse.jdt.core.dom.ASTNode astNode = parser.createAST(new NullProgressMonitor());
	return (Expression) astNode;
}
 

private CompilationUnit getSuperClassCU(Type superClass) {
	ICompilationUnit element = (ICompilationUnit) superClass.resolveBinding().getTypeDeclaration().getJavaElement()
			.getParent();

	ASTParser parser = ASTParser.newParser(AST.JLS8);
	parser.setResolveBindings(true);
	parser.setBindingsRecovery(true);
	parser.setSource(element);

	return (CompilationUnit) parser.createAST(null);
}
 

private List<String> getStringRepresentation(IMethod method, ProjectVersion version) {
	List<String> stringRepresentation = null;
	if(method != null) {
		ICompilationUnit iCompilationUnit = method.getCompilationUnit();
		ASTParser parser = ASTParser.newParser(ASTReader.JLS);
		parser.setKind(ASTParser.K_COMPILATION_UNIT);
		parser.setSource(iCompilationUnit);
		parser.setResolveBindings(true);
		CompilationUnit compilationUnit = (CompilationUnit)parser.createAST(null);
		IType declaringType = method.getDeclaringType();
		TypeDeclaration typeDeclaration = (TypeDeclaration)compilationUnit.findDeclaringNode(declaringType.getKey());
		MethodDeclaration matchingMethodDeclaration = null;
		for(MethodDeclaration methodDeclaration : typeDeclaration.getMethods()) {
			IMethod resolvedMethod = (IMethod)methodDeclaration.resolveBinding().getJavaElement();
			if(resolvedMethod.isSimilar(method)) {
				matchingMethodDeclaration = methodDeclaration;
				break;
			}
		}
		if(matchingMethodDeclaration != null && matchingMethodDeclaration.getBody() != null) {
			methodCodeMap.put(version, matchingMethodDeclaration.toString());
			ASTInformationGenerator.setCurrentITypeRoot(iCompilationUnit);
			MethodBodyObject methodBody = new MethodBodyObject(matchingMethodDeclaration.getBody());
			stringRepresentation = methodBody.stringRepresentation();
		}
	}
	return stringRepresentation;
}
 

public static List<ParsedCu> parseCus(IJavaProject javaProject, String compilerCompliance, String text) {
	ASTParser parser= ASTParser.newParser(ASTProvider.SHARED_AST_LEVEL);
	if (javaProject != null) {
		parser.setProject(javaProject);
	} else if (compilerCompliance != null) {
		Map<String, String> options= JavaCore.getOptions();
		JavaModelUtil.setComplianceOptions(options, compilerCompliance);
		parser.setCompilerOptions(options);
	}
	parser.setSource(text.toCharArray());
	parser.setStatementsRecovery(true);
	CompilationUnit unit= (CompilationUnit) parser.createAST(null);

	if (unit.types().size() > 0)
		return parseAsTypes(text, unit);

	parser.setProject(javaProject);
	parser.setSource(text.toCharArray());
	parser.setStatementsRecovery(true);
	parser.setKind(ASTParser.K_CLASS_BODY_DECLARATIONS);
	ASTNode root= parser.createAST(null);
	if (root instanceof TypeDeclaration) {
		List<BodyDeclaration> bodyDeclarations= ((TypeDeclaration) root).bodyDeclarations();
		if (bodyDeclarations.size() > 0)
			return Collections.singletonList(new ParsedCu(text, ASTParser.K_CLASS_BODY_DECLARATIONS, null, null));
	}

	parser.setProject(javaProject);
	parser.setSource(text.toCharArray());
	parser.setStatementsRecovery(true);
	parser.setKind(ASTParser.K_STATEMENTS);
	root= parser.createAST(null);
	if (root instanceof Block) {
		List<Statement> statements= ((Block) root).statements();
		if (statements.size() > 0)
			return Collections.singletonList(new ParsedCu(text, ASTParser.K_STATEMENTS, null, null));
	}

	return Collections.emptyList();
}
 

private static CompilationUnit createAST(IJavaElement element, String cuSource) {
	ASTParser parser = ASTParser.newParser(IASTSharedValues.SHARED_AST_LEVEL);

	IJavaProject javaProject= element.getJavaProject();
	parser.setProject(javaProject);
	Map<String, String> options= javaProject.getOptions(true);
	options.put(JavaCore.COMPILER_DOC_COMMENT_SUPPORT, JavaCore.ENABLED); // workaround for https://bugs.eclipse.org/bugs/show_bug.cgi?id=212207
	parser.setCompilerOptions(options);

	parser.setSource(cuSource.toCharArray());
	return (CompilationUnit) parser.createAST(null);
}
 

public static CompilationUnit parseCompilationUnit(
    ICompilationUnit compilationUnit) {
  ASTParser parser = ASTParser.newParser(AST.JLS3);
  parser.setResolveBindings(true);
  parser.setSource(compilationUnit);
  return (CompilationUnit) parser.createAST(null);
}
 

private CompilationUnit createSourceCuNode() {
	Assert.isTrue(getSourceCu() != null || getSourceClassFile() != null);
	Assert.isTrue(getSourceCu() == null || getSourceClassFile() == null);
	ASTParser parser= ASTParser.newParser(ASTProvider.SHARED_AST_LEVEL);
	parser.setBindingsRecovery(true);
	parser.setResolveBindings(true);
	if (getSourceCu() != null)
		parser.setSource(getSourceCu());
	else
		parser.setSource(getSourceClassFile());
	return (CompilationUnit) parser.createAST(null);
}
 

@Override
public Change createChange(IProgressMonitor pm) throws CoreException {
	ASTParser p= ASTParser.newParser(ASTProvider.SHARED_AST_LEVEL);
	p.setSource(getDestinationCu());
	CompilationUnit cuNode= (CompilationUnit) p.createAST(pm);
	ASTRewrite rewrite= ASTRewrite.create(cuNode.getAST());
	TypedSource source= null;
	for (int i= fSources.length - 1; i >= 0; i--) {
		source= fSources[i];
		final ASTNode destination= getDestinationNodeForSourceElement(fDestination, source.getType(), cuNode);
		if (destination != null) {
			if (destination instanceof CompilationUnit)
				insertToCu(rewrite, createNewNodeToInsertToCu(source, rewrite), (CompilationUnit) destination);
			else if (destination instanceof AbstractTypeDeclaration)
				insertToType(rewrite, createNewNodeToInsertToType(source, rewrite), (AbstractTypeDeclaration) destination);
		}
	}
	final CompilationUnitChange result= new CompilationUnitChange(ReorgMessages.PasteAction_change_name, getDestinationCu());
	try {
		ITextFileBuffer buffer= RefactoringFileBuffers.acquire(getDestinationCu());
		TextEdit rootEdit= rewrite.rewriteAST(buffer.getDocument(), fDestination.getJavaProject().getOptions(true));
		if (getDestinationCu().isWorkingCopy())
			result.setSaveMode(TextFileChange.LEAVE_DIRTY);
		TextChangeCompatibility.addTextEdit(result, ReorgMessages.PasteAction_edit_name, rootEdit);
	} finally {
		RefactoringFileBuffers.release(getDestinationCu());
	}
	return result;
}
 

/**
 * setupParser Method that sets up the Parser and creates a visitor for a specific unit
 *
 * @param unit Unit from getUnitForParser
 */
private void setupParser(final ICompilationUnit unit) {
	final ASTParser parser = ASTParser.newParser(AST.JLS10);
	parser.setKind(ASTParser.K_COMPILATION_UNIT);
	parser.setSource(unit);
	parser.setResolveBindings(true);
	final CompilationUnit cu = (CompilationUnit) parser.createAST(null);
	cu.accept(createMarkerVisitor(unit, cu));
}
 

public static String getPackageName(IJavaProject javaProject, String fileContent) {
	if (fileContent == null) {
		return "";
	}
	//TODO probably not the most efficient way to get the package name as this reads the whole file;
	char[] source = fileContent.toCharArray();
	ASTParser parser = ASTParser.newParser(IASTSharedValues.SHARED_AST_LEVEL);
	parser.setProject(javaProject);
	parser.setIgnoreMethodBodies(true);
	parser.setSource(source);
	CompilationUnit ast = (CompilationUnit) parser.createAST(null);
	PackageDeclaration pkg = ast.getPackage();
	return (pkg == null || pkg.getName() == null)?"":pkg.getName().getFullyQualifiedName();
}
 

private static Type parseType(String typeString, IJavaProject javaProject, List<String> problemsCollector) {
	if ("".equals(typeString.trim())) //speed up for a common case //$NON-NLS-1$
		return null;
	if (! typeString.trim().equals(typeString))
		return null;

	StringBuffer cuBuff= new StringBuffer();
	cuBuff.append("interface A{"); //$NON-NLS-1$
	int offset= cuBuff.length();
	cuBuff.append(typeString).append(" m();}"); //$NON-NLS-1$

	ASTParser p= ASTParser.newParser(ASTProvider.SHARED_AST_LEVEL);
	p.setSource(cuBuff.toString().toCharArray());
	p.setProject(javaProject);
	CompilationUnit cu= (CompilationUnit) p.createAST(null);
	Selection selection= Selection.createFromStartLength(offset, typeString.length());
	SelectionAnalyzer analyzer= new SelectionAnalyzer(selection, false);
	cu.accept(analyzer);
	ASTNode selected= analyzer.getFirstSelectedNode();
	if (!(selected instanceof Type))
		return null;
	Type type= (Type)selected;
	if (MethodTypesSyntaxChecker.isVoidArrayType(type))
		return null;
	IProblem[] problems= ASTNodes.getProblems(type, ASTNodes.NODE_ONLY, ASTNodes.PROBLEMS);
	if (problems.length > 0) {
		for (int i= 0; i < problems.length; i++)
			problemsCollector.add(problems[i].getMessage());
	}

	String typeNodeRange= cuBuff.substring(type.getStartPosition(), ASTNodes.getExclusiveEnd(type));
	if (typeString.equals(typeNodeRange))
		return type;
	else
		return null;
}
 

private IStructureComparator createStructureComparator(final Object input, char[] buffer, IDocument doc, ISharedDocumentAdapter adapter, IProgressMonitor monitor) {
	String contents;
	Map<String, String> compilerOptions= null;

	if (input instanceof IResourceProvider) {
		IResource resource= ((IResourceProvider) input).getResource();
		if (resource != null) {
			IJavaElement element= JavaCore.create(resource);
			if (element != null) {
				IJavaProject javaProject= element.getJavaProject();
				if (javaProject != null)
					compilerOptions= javaProject.getOptions(true);
			}
		}
	}
	if (compilerOptions == null)
		compilerOptions= fDefaultCompilerOptions;

	if (doc != null) {
		boolean isEditable= false;
		if (input instanceof IEditableContent)
			isEditable= ((IEditableContent) input).isEditable();

		// we hook into the root node to intercept all node changes
		JavaNode root= new RootJavaNode(doc, isEditable, input, adapter);

		if (buffer == null) {
			contents= doc.get();
			int n= contents.length();
			buffer= new char[n];
			contents.getChars(0, n, buffer, 0);
		}

		ASTParser parser= ASTParser.newParser(ASTProvider.SHARED_AST_LEVEL);
		if (compilerOptions != null)
			parser.setCompilerOptions(compilerOptions);
		parser.setSource(buffer);
		parser.setFocalPosition(0);
		CompilationUnit cu= (CompilationUnit) parser.createAST(monitor);
		cu.accept(new JavaParseTreeBuilder(root, buffer, true));

		return root;
	}
	return null;
}
 

@Override
protected boolean isNewContext() {

	final String templateVariableRegEx= "\\$\\{[^\\}]*\\}"; //$NON-NLS-1$

	String template= fTemplate.getPattern();
	int currentPosition= template.indexOf($_LINE_SELECTION);
	int insertionPosition= -1;
	while (currentPosition != -1) {
		insertionPosition= currentPosition;
		template= template.replaceFirst(templateVariableRegEx, ""); //$NON-NLS-1$
		currentPosition= template.indexOf($_LINE_SELECTION);
	}
	template= template.replaceAll(templateVariableRegEx, ""); //$NON-NLS-1$

	AST ast= getAst();
	ASTParser parser= ASTParser.newParser(ast.apiLevel());
	parser.setSource(template.toCharArray());
	parser.setProject(fCurrentProject);
	parser.setKind(ASTParser.K_STATEMENTS);
	ASTNode root= parser.createAST(null);
	if (((Block)root).statements().isEmpty()) {
		parser= ASTParser.newParser(ast.apiLevel());
		parser.setSource(template.toCharArray());
		parser.setProject(fCurrentProject);
		parser.setKind(ASTParser.K_EXPRESSION);
		root= parser.createAST(null);
	}

	final int lineSelectionPosition= insertionPosition;
	root.accept(new GenericVisitor() {
		@Override
		public void endVisit(Block node) {
			super.endVisit(node);
			if (fTemplateNode == null && node.getStartPosition() <= lineSelectionPosition && node.getLength() + node.getStartPosition() >= lineSelectionPosition) {
				fTemplateNode= node;
			}
		}
	});

	if (fTemplateNode != null && ASTNodes.getParent(fTemplateNode, MethodDeclaration.class) != null) {
		return true;
	}

	return false;
}
 

/**
 * Returns a resolved AST with {@link AST#JLS3 JLS3} level.
 * It is created from the current state of the working copy.
 * Creates one if none exists yet.
 * Returns <code>null</code> if the current state of the working copy
 * doesn't allow the AST to be created (e.g. if the working copy's content
 * cannot be parsed).
 * <p>
 * If the AST level requested during reconciling is not {@link AST#JLS3}
 * or if binding resolutions was not requested, then a different AST is created.
 * Note that this AST does not become the current AST and it is only valid for
 * the requestor.
 * </p>
 *
 * @return the AST created from the current state of the working copy,
 *   or <code>null</code> if none could be created
 * @exception JavaModelException  if the contents of the working copy
 *		cannot be accessed. Reasons include:
 * <ul>
 * <li> The working copy does not exist (ELEMENT_DOES_NOT_EXIST)</li>
 * </ul>
 * @deprecated JLS3 has been deprecated. This method has been replaced by {@link #getAST4()} which returns an AST
 * with JLS4 level.
 */
public org.eclipse.jdt.core.dom.CompilationUnit getAST3() throws JavaModelException {
	if (this.operation.astLevel != AST.JLS3 || !this.operation.resolveBindings) {
		// create AST (optionally resolving bindings)
		ASTParser parser = ASTParser.newParser(AST.JLS3);
		parser.setCompilerOptions(this.workingCopy.getJavaProject().getOptions(true));
		if (JavaProject.hasJavaNature(this.workingCopy.getJavaProject().getProject()))
			parser.setResolveBindings(true);
		parser.setStatementsRecovery((this.operation.reconcileFlags & ICompilationUnit.ENABLE_STATEMENTS_RECOVERY) != 0);
		parser.setBindingsRecovery((this.operation.reconcileFlags & ICompilationUnit.ENABLE_BINDINGS_RECOVERY) != 0);
		parser.setSource(this.workingCopy);
		parser.setIgnoreMethodBodies((this.operation.reconcileFlags & ICompilationUnit.IGNORE_METHOD_BODIES) != 0);
		return (org.eclipse.jdt.core.dom.CompilationUnit) parser.createAST(this.operation.progressMonitor);
	}
	return this.operation.makeConsistent(this.workingCopy);
}
 

/**
 * Hook method that gets called when the type name has changed. The method validates the
 * type name and returns the status of the validation.
 * <p>
 * Subclasses may extend this method to perform their own validation.
 * </p>
 *
 * @return the status of the validation
 */
protected IStatus typeNameChanged() {
	StatusInfo status= new StatusInfo();
	fCurrType= null;
	String typeNameWithParameters= getTypeName();
	// must not be empty
	if (typeNameWithParameters.length() == 0) {
		status.setError(NewWizardMessages.NewTypeWizardPage_error_EnterTypeName);
		return status;
	}

	String typeName= getTypeNameWithoutParameters();
	if (typeName.indexOf('.') != -1) {
		status.setError(NewWizardMessages.NewTypeWizardPage_error_QualifiedName);
		return status;
	}

	IJavaProject project= getJavaProject();
	IStatus val= validateJavaTypeName(typeName, project);
	if (val.getSeverity() == IStatus.ERROR) {
		status.setError(Messages.format(NewWizardMessages.NewTypeWizardPage_error_InvalidTypeName, val.getMessage()));
		return status;
	} else if (val.getSeverity() == IStatus.WARNING) {
		status.setWarning(Messages.format(NewWizardMessages.NewTypeWizardPage_warning_TypeNameDiscouraged, val.getMessage()));
		// continue checking
	}

	// must not exist
	if (!isEnclosingTypeSelected()) {
		IPackageFragment pack= getPackageFragment();
		if (pack != null) {
			ICompilationUnit cu= pack.getCompilationUnit(getCompilationUnitName(typeName));
			fCurrType= cu.getType(typeName);
			IResource resource= cu.getResource();

			if (resource.exists()) {
				status.setError(NewWizardMessages.NewTypeWizardPage_error_TypeNameExists);
				return status;
			}
			if (!ResourcesPlugin.getWorkspace().validateFiltered(resource).isOK()) {
				status.setError(NewWizardMessages.NewTypeWizardPage_error_TypeNameFiltered);
				return status;
			}
			URI location= resource.getLocationURI();
			if (location != null) {
				try {
					IFileStore store= EFS.getStore(location);
					if (store.fetchInfo().exists()) {
						status.setError(NewWizardMessages.NewTypeWizardPage_error_TypeNameExistsDifferentCase);
						return status;
					}
				} catch (CoreException e) {
					status.setError(Messages.format(
						NewWizardMessages.NewTypeWizardPage_error_uri_location_unkown,
						BasicElementLabels.getURLPart(Resources.getLocationString(resource))));
				}
			}
		}
	} else {
		IType type= getEnclosingType();
		if (type != null) {
			fCurrType= type.getType(typeName);
			if (fCurrType.exists()) {
				status.setError(NewWizardMessages.NewTypeWizardPage_error_TypeNameExists);
				return status;
			}
		}
	}

	if (!typeNameWithParameters.equals(typeName) && project != null) {
		if (!JavaModelUtil.is50OrHigher(project)) {
			status.setError(NewWizardMessages.NewTypeWizardPage_error_TypeParameters);
			return status;
		}
		String typeDeclaration= "class " + typeNameWithParameters + " {}"; //$NON-NLS-1$//$NON-NLS-2$
		ASTParser parser= ASTParser.newParser(ASTProvider.SHARED_AST_LEVEL);
		parser.setSource(typeDeclaration.toCharArray());
		parser.setProject(project);
		CompilationUnit compilationUnit= (CompilationUnit) parser.createAST(null);
		IProblem[] problems= compilationUnit.getProblems();
		if (problems.length > 0) {
			status.setError(Messages.format(NewWizardMessages.NewTypeWizardPage_error_InvalidTypeName, problems[0].getMessage()));
			return status;
		}
	}
	return status;
}
 

/**
 * Get the AST of a file, including additional source paths to resolve
 * cross-file bindings. It is assumed that a CompilationUnit will be
 * returned. A heuristic is used to set the file's path variable.
 * <p>
 * Note: this may only yield a big improvement if the above heuristic fails
 * and srcPaths contains the correct source path.
 *
 * @param file
 * @param srcPaths
 *            for binding resolution
 * @return the compilation unit of the file
 * @throws IOException
 */
public final CompilationUnit getAST(final File file,
		final Set<String> srcPaths) throws IOException {
	final String sourceFile = FileUtils.readFileToString(file);
	final ASTParser parser = ASTParser.newParser(AST.JLS8);
	parser.setKind(ASTParser.K_COMPILATION_UNIT);

	final Map<String, String> options = new Hashtable<String, String>();
	options.put(JavaCore.COMPILER_CODEGEN_TARGET_PLATFORM,
			JavaCore.VERSION_1_8);
	options.put(JavaCore.COMPILER_SOURCE, JavaCore.VERSION_1_8);
	if (useJavadocs) {
		options.put(JavaCore.COMPILER_DOC_COMMENT_SUPPORT, JavaCore.ENABLED);
	}
	parser.setCompilerOptions(options);
	parser.setSource(sourceFile.toCharArray()); // set source
	parser.setResolveBindings(useBindings);
	parser.setBindingsRecovery(useBindings);

	parser.setStatementsRecovery(true);

	parser.setUnitName(file.getAbsolutePath());

	// Heuristic to retrieve source file path
	final String srcFilePath;
	if (file.getAbsolutePath().contains("/src")) {
		srcFilePath = file.getAbsolutePath().substring(0,
				file.getAbsolutePath().indexOf("src", 0) + 3);
	} else {
		srcFilePath = "";
	}

	// Add file to source paths if not already present
	srcPaths.add(srcFilePath);

	final String[] sourcePathEntries = srcPaths.toArray(new String[srcPaths
			.size()]);
	final String[] classPathEntries = new String[0];
	parser.setEnvironment(classPathEntries, sourcePathEntries, null, true);

	final CompilationUnit compilationUnit = (CompilationUnit) parser
			.createAST(null);
	return compilationUnit;
}