org.eclipse.jdt.core.dom.ASTNode#SUPER_FIELD_ACCESS源码实例Demo

static boolean isLeftHandSideOfAssignment(ASTNode node) {
	Assignment assignment = (Assignment) ASTNodes.getParent(node, ASTNode.ASSIGNMENT);
	if (assignment != null) {
		Expression leftHandSide = assignment.getLeftHandSide();
		if (leftHandSide == node) {
			return true;
		}
		if (ASTNodes.isParent(node, leftHandSide)) {
			switch (leftHandSide.getNodeType()) {
				case ASTNode.SIMPLE_NAME:
					return true;
				case ASTNode.FIELD_ACCESS:
					return node == ((FieldAccess) leftHandSide).getName();
				case ASTNode.QUALIFIED_NAME:
					return node == ((QualifiedName) leftHandSide).getName();
				case ASTNode.SUPER_FIELD_ACCESS:
					return node == ((SuperFieldAccess) leftHandSide).getName();
				default:
					return false;
			}
		}
	}
	return false;
}
 

private static boolean isLeftHandSideOfAssignment(ASTNode node) {
	Assignment assignment= (Assignment)ASTNodes.getParent(node, ASTNode.ASSIGNMENT);
	if (assignment != null) {
		Expression leftHandSide= assignment.getLeftHandSide();
		if (leftHandSide == node) {
			return true;
		}
		if (ASTNodes.isParent(node, leftHandSide)) {
			switch (leftHandSide.getNodeType()) {
				case ASTNode.SIMPLE_NAME:
					return true;
				case ASTNode.FIELD_ACCESS:
					return node == ((FieldAccess)leftHandSide).getName();
				case ASTNode.QUALIFIED_NAME:
					return node == ((QualifiedName)leftHandSide).getName();
				case ASTNode.SUPER_FIELD_ACCESS:
					return node == ((SuperFieldAccess)leftHandSide).getName();
				default:
					return false;
			}
		}
	}
	return false;
}
 

/**
 * Returns the binding of the variable written in an Assignment.
 * @param assignment The assignment
 * @return The binding or <code>null</code> if no bindings are available.
 */
public static IVariableBinding getAssignedVariable(Assignment assignment) {
	Expression leftHand = assignment.getLeftHandSide();
	switch (leftHand.getNodeType()) {
		case ASTNode.SIMPLE_NAME:
			return (IVariableBinding) ((SimpleName) leftHand).resolveBinding();
		case ASTNode.QUALIFIED_NAME:
			return (IVariableBinding) ((QualifiedName) leftHand).getName().resolveBinding();
		case ASTNode.FIELD_ACCESS:
			return ((FieldAccess) leftHand).resolveFieldBinding();
		case ASTNode.SUPER_FIELD_ACCESS:
			return ((SuperFieldAccess) leftHand).resolveFieldBinding();
		default:
			return null;
	}
}
 

private Expression getQualifier(ASTNode parent) {
	switch (parent.getNodeType()) {
		case ASTNode.FIELD_ACCESS:
			return ((FieldAccess) parent).getExpression();
		case ASTNode.QUALIFIED_NAME:
			return ((QualifiedName)parent).getQualifier();
		case ASTNode.SUPER_FIELD_ACCESS:
			return ((SuperFieldAccess)parent).getQualifier();
		default:
			return null;
	}
}
 

public static boolean isWriteAccess(Name selectedNode) {
	ASTNode curr= selectedNode;
	ASTNode parent= curr.getParent();
	while (parent != null) {
		switch (parent.getNodeType()) {
			case ASTNode.QUALIFIED_NAME:
				if (((QualifiedName) parent).getQualifier() == curr) {
					return false;
				}
				break;
			case ASTNode.FIELD_ACCESS:
				if (((FieldAccess) parent).getExpression() == curr) {
					return false;
				}
				break;
			case ASTNode.SUPER_FIELD_ACCESS:
				break;
			case ASTNode.ASSIGNMENT:
				return ((Assignment) parent).getLeftHandSide() == curr;
			case ASTNode.VARIABLE_DECLARATION_FRAGMENT:
			case ASTNode.SINGLE_VARIABLE_DECLARATION:
				return ((VariableDeclaration) parent).getName() == curr;
			case ASTNode.POSTFIX_EXPRESSION:
				return true;
			case ASTNode.PREFIX_EXPRESSION:
				PrefixExpression.Operator op= ((PrefixExpression) parent).getOperator();
				return op == PrefixExpression.Operator.DECREMENT || op == PrefixExpression.Operator.INCREMENT;
			default:
				return false;
		}

		curr= parent;
		parent= curr.getParent();
	}
	return false;
}
 

private Expression convert(org.eclipse.jdt.core.dom.Expression expression) {
  switch (expression.getNodeType()) {
    case ASTNode.ARRAY_ACCESS:
      return convert((org.eclipse.jdt.core.dom.ArrayAccess) expression);
    case ASTNode.ARRAY_CREATION:
      return convert((org.eclipse.jdt.core.dom.ArrayCreation) expression);
    case ASTNode.ARRAY_INITIALIZER:
      return convert((org.eclipse.jdt.core.dom.ArrayInitializer) expression);
    case ASTNode.ASSIGNMENT:
      return convert((org.eclipse.jdt.core.dom.Assignment) expression);
    case ASTNode.BOOLEAN_LITERAL:
      return convert((org.eclipse.jdt.core.dom.BooleanLiteral) expression);
    case ASTNode.CAST_EXPRESSION:
      return convert((org.eclipse.jdt.core.dom.CastExpression) expression);
    case ASTNode.CHARACTER_LITERAL:
      return convert((org.eclipse.jdt.core.dom.CharacterLiteral) expression);
    case ASTNode.CLASS_INSTANCE_CREATION:
      return convert((org.eclipse.jdt.core.dom.ClassInstanceCreation) expression);
    case ASTNode.CONDITIONAL_EXPRESSION:
      return convert((org.eclipse.jdt.core.dom.ConditionalExpression) expression);
    case ASTNode.EXPRESSION_METHOD_REFERENCE:
      return convert((org.eclipse.jdt.core.dom.ExpressionMethodReference) expression);
    case ASTNode.CREATION_REFERENCE:
      return convert((org.eclipse.jdt.core.dom.CreationReference) expression);
    case ASTNode.TYPE_METHOD_REFERENCE:
      return convert((org.eclipse.jdt.core.dom.TypeMethodReference) expression);
    case ASTNode.SUPER_METHOD_REFERENCE:
      return convert((org.eclipse.jdt.core.dom.SuperMethodReference) expression);
    case ASTNode.FIELD_ACCESS:
      return convert((org.eclipse.jdt.core.dom.FieldAccess) expression);
    case ASTNode.INFIX_EXPRESSION:
      return convert((org.eclipse.jdt.core.dom.InfixExpression) expression);
    case ASTNode.INSTANCEOF_EXPRESSION:
      return convert((org.eclipse.jdt.core.dom.InstanceofExpression) expression);
    case ASTNode.LAMBDA_EXPRESSION:
      return convert((org.eclipse.jdt.core.dom.LambdaExpression) expression);
    case ASTNode.METHOD_INVOCATION:
      return convert((org.eclipse.jdt.core.dom.MethodInvocation) expression);
    case ASTNode.NULL_LITERAL:
      return NullLiteral.get();
    case ASTNode.NUMBER_LITERAL:
      return convert((org.eclipse.jdt.core.dom.NumberLiteral) expression);
    case ASTNode.PARENTHESIZED_EXPRESSION:
      return convert((org.eclipse.jdt.core.dom.ParenthesizedExpression) expression);
    case ASTNode.POSTFIX_EXPRESSION:
      return convert((org.eclipse.jdt.core.dom.PostfixExpression) expression);
    case ASTNode.PREFIX_EXPRESSION:
      return convert((org.eclipse.jdt.core.dom.PrefixExpression) expression);
    case ASTNode.QUALIFIED_NAME:
      return convert((org.eclipse.jdt.core.dom.QualifiedName) expression);
    case ASTNode.SIMPLE_NAME:
      return convert((org.eclipse.jdt.core.dom.SimpleName) expression);
    case ASTNode.STRING_LITERAL:
      return convert((org.eclipse.jdt.core.dom.StringLiteral) expression);
    case ASTNode.SUPER_FIELD_ACCESS:
      return convert((org.eclipse.jdt.core.dom.SuperFieldAccess) expression);
    case ASTNode.SUPER_METHOD_INVOCATION:
      return convert((org.eclipse.jdt.core.dom.SuperMethodInvocation) expression);
    case ASTNode.THIS_EXPRESSION:
      return convert((org.eclipse.jdt.core.dom.ThisExpression) expression);
    case ASTNode.TYPE_LITERAL:
      return convert((org.eclipse.jdt.core.dom.TypeLiteral) expression);
    case ASTNode.VARIABLE_DECLARATION_EXPRESSION:
      return convert((org.eclipse.jdt.core.dom.VariableDeclarationExpression) expression);
    default:
      throw internalCompilerError(
          "Unexpected type for Expression: %s", expression.getClass().getName());
  }
}
 

public static Type guessTypeForReference(AST ast, ASTNode node) {
	ASTNode parent= node.getParent();
	while (parent != null) {
		switch (parent.getNodeType()) {
			case ASTNode.VARIABLE_DECLARATION_FRAGMENT:
				if (((VariableDeclarationFragment) parent).getInitializer() == node) {
					return ASTNodeFactory.newType(ast, (VariableDeclaration) parent);
				}
				return null;
			case ASTNode.SINGLE_VARIABLE_DECLARATION:
				if (((VariableDeclarationFragment) parent).getInitializer() == node) {
					return ASTNodeFactory.newType(ast, (VariableDeclaration) parent);
				}
				return null;
			case ASTNode.ARRAY_ACCESS:
				if (!((ArrayAccess) parent).getIndex().equals(node)) {
					Type type = guessTypeForReference(ast, parent);
					if (type != null) {
						return ASTNodeFactory.newArrayType(type);
					}
				}
				return null;
			case ASTNode.FIELD_ACCESS:
				if (node.equals(((FieldAccess) parent).getName())) {
					node = parent;
					parent = parent.getParent();
				} else {
					return null;
				}
				break;
			case ASTNode.SUPER_FIELD_ACCESS:
			case ASTNode.PARENTHESIZED_EXPRESSION:
				node= parent;
				parent= parent.getParent();
				break;
			case ASTNode.QUALIFIED_NAME:
				if (node.equals(((QualifiedName) parent).getName())) {
					node = parent;
					parent = parent.getParent();
				} else {
					return null;
				}
				break;
			default:
				return null;
		}
	}
	return null;
}
 

private RefactoringStatus replaceReferences(ParameterObjectFactory pof, SearchResultGroup group, CompilationUnitRewrite cuRewrite) {
	TextEditGroup writeGroup= cuRewrite.createGroupDescription(RefactoringCoreMessages.ExtractClassRefactoring_group_replace_write);
	TextEditGroup readGroup= cuRewrite.createGroupDescription(RefactoringCoreMessages.ExtractClassRefactoring_group_replace_read);
	ITypeRoot typeRoot= cuRewrite.getCu();
	IJavaProject javaProject= typeRoot.getJavaProject();
	AST ast= cuRewrite.getAST();

	RefactoringStatus status= new RefactoringStatus();
	String parameterName= fDescriptor.getFieldName();

	SearchMatch[] searchResults= group.getSearchResults();
	for (int j= 0; j < searchResults.length; j++) {
		SearchMatch searchMatch= searchResults[j];
		ASTNode node= NodeFinder.perform(cuRewrite.getRoot(), searchMatch.getOffset(), searchMatch.getLength());
		ASTNode parent= node.getParent();
		boolean isDeclaration= parent instanceof VariableDeclaration && ((VariableDeclaration)parent).getInitializer() != node;
		if (!isDeclaration && node instanceof SimpleName) {
			ASTRewrite rewrite= cuRewrite.getASTRewrite();
			if (parent.getNodeType() == ASTNode.SWITCH_CASE)
				status.addError(RefactoringCoreMessages.ExtractClassRefactoring_error_switch, JavaStatusContext.create(typeRoot, node));

			SimpleName name= (SimpleName) node;
			ParameterInfo pi= getFieldInfo(name.getIdentifier()).pi;
			boolean writeAccess= ASTResolving.isWriteAccess(name);
			if (writeAccess && fDescriptor.isCreateGetterSetter()) {
				boolean useSuper= parent.getNodeType() == ASTNode.SUPER_FIELD_ACCESS;
				Expression qualifier= getQualifier(parent);
				ASTNode replaceNode= getReplacementNode(parent, useSuper, qualifier);
				Expression assignedValue= getAssignedValue(pof, parameterName, javaProject, status, rewrite, pi, useSuper, name.resolveTypeBinding(), qualifier, replaceNode, typeRoot);
				if (assignedValue == null) {
					status.addError(RefactoringCoreMessages.ExtractClassRefactoring_error_unable_to_convert_node, JavaStatusContext.create(typeRoot, replaceNode));
				} else {
					NullLiteral marker= qualifier == null ? null : ast.newNullLiteral();
					Expression access= pof.createFieldWriteAccess(pi, parameterName, ast, javaProject, assignedValue, useSuper, marker);
					replaceMarker(rewrite, qualifier, access, marker);
					rewrite.replace(replaceNode, access, writeGroup);
				}
			} else {
				Expression fieldReadAccess= pof.createFieldReadAccess(pi, parameterName, ast, javaProject, false, null); //qualifier is already there
				rewrite.replace(name, fieldReadAccess, readGroup);
			}
		}
	}
	return status;
}
 

/**
 * Resolve the binding (<em>not</em> the type binding) for the expression or a nested expression
 * (e.g. nested in parentheses, cast, ...).
 * 
 * @param expression an expression node
 * @param goIntoCast iff <code>true</code>, go into a CastExpression's expression to resolve
 * @return the expression binding, or <code>null</code> if the expression has no binding or the
 *         binding could not be resolved
 * 
 * @see StubUtility#getVariableNameSuggestions(int, IJavaProject, ITypeBinding, Expression, java.util.Collection)
 * @since 3.5
 */
public static IBinding resolveExpressionBinding(Expression expression, boolean goIntoCast) {
	//TODO: search for callers of resolve*Binding() methods and replace with call to this method
	
	// similar to StubUtility#getVariableNameSuggestions(int, IJavaProject, ITypeBinding, Expression, Collection)
	switch (expression.getNodeType()) {
		case ASTNode.SIMPLE_NAME:
		case ASTNode.QUALIFIED_NAME:
			return ((Name) expression).resolveBinding();
			
		case ASTNode.FIELD_ACCESS:
			return ((FieldAccess) expression).resolveFieldBinding();
		case ASTNode.SUPER_FIELD_ACCESS:
			return ((SuperFieldAccess) expression).resolveFieldBinding();
			
		case ASTNode.METHOD_INVOCATION:
			return ((MethodInvocation) expression).resolveMethodBinding();
		case ASTNode.SUPER_METHOD_INVOCATION:
			return ((SuperMethodInvocation) expression).resolveMethodBinding();
		case ASTNode.CLASS_INSTANCE_CREATION:
			return ((ClassInstanceCreation) expression).resolveConstructorBinding();
			
		case ASTNode.MARKER_ANNOTATION:
		case ASTNode.SINGLE_MEMBER_ANNOTATION:
		case ASTNode.NORMAL_ANNOTATION:
			return ((Annotation) expression).resolveAnnotationBinding();
			
		case ASTNode.ARRAY_ACCESS:
			return resolveExpressionBinding(((ArrayAccess) expression).getArray(), goIntoCast);
		case ASTNode.CAST_EXPRESSION:
			if (goIntoCast) {
				return resolveExpressionBinding(((CastExpression) expression).getExpression(), true);
			} else {
				return null;
			}
		case ASTNode.PARENTHESIZED_EXPRESSION:
			return resolveExpressionBinding(((ParenthesizedExpression) expression).getExpression(), goIntoCast);
		case ASTNode.PREFIX_EXPRESSION:
			return resolveExpressionBinding(((PrefixExpression) expression).getOperand(), goIntoCast);
		case ASTNode.POSTFIX_EXPRESSION:
			return resolveExpressionBinding(((PostfixExpression) expression).getOperand(), goIntoCast);
		default:
			return null;
	}
}
 

public static Type guessTypeForReference(AST ast, ASTNode node) {
	ASTNode parent= node.getParent();
	while (parent != null) {
		switch (parent.getNodeType()) {
			case ASTNode.VARIABLE_DECLARATION_FRAGMENT:
				if (((VariableDeclarationFragment) parent).getInitializer() == node) {
					return ASTNodeFactory.newType(ast, (VariableDeclaration) parent);
				}
				return null;
			case ASTNode.SINGLE_VARIABLE_DECLARATION:
				if (((VariableDeclarationFragment) parent).getInitializer() == node) {
					return ASTNodeFactory.newType(ast, (VariableDeclaration) parent);
				}
				return null;
			case ASTNode.ARRAY_ACCESS:
				if (!((ArrayAccess) parent).getIndex().equals(node)) {
					Type type= guessTypeForReference(ast, parent);
					if (type != null) {
						return ASTNodeFactory.newArrayType(type);
					}
				}
				return null;
			case ASTNode.FIELD_ACCESS:
				if (node.equals(((FieldAccess) parent).getName())) {
					node= parent;
					parent= parent.getParent();
				} else {
					return null;
				}
				break;
			case ASTNode.SUPER_FIELD_ACCESS:
			case ASTNode.PARENTHESIZED_EXPRESSION:
				node= parent;
				parent= parent.getParent();
				break;
			case ASTNode.QUALIFIED_NAME:
				if (node.equals(((QualifiedName) parent).getName())) {
					node= parent;
					parent= parent.getParent();
				} else {
					return null;
				}
				break;
			default:
				return null;
		}
	}
	return null;
}