org.eclipse.jdt.core.dom.FieldAccess#getName ( )源码实例Demo

public static SimpleName isGetter(MethodDeclaration methodDeclaration) {
	Block methodBody = methodDeclaration.getBody();
	List<SingleVariableDeclaration> parameters = methodDeclaration.parameters();
	if(methodBody != null) {
		List<Statement> statements = methodBody.statements();
		if(statements.size() == 1 && parameters.size() == 0) {
			Statement statement = statements.get(0);
    		if(statement instanceof ReturnStatement) {
    			ReturnStatement returnStatement = (ReturnStatement)statement;
    			Expression returnStatementExpression = returnStatement.getExpression();
    			if(returnStatementExpression instanceof SimpleName) {
    				return (SimpleName)returnStatementExpression;
    			}
    			else if(returnStatementExpression instanceof FieldAccess) {
    				FieldAccess fieldAccess = (FieldAccess)returnStatementExpression;
    				return fieldAccess.getName();
    			}
    		}
		}
	}
	return null;
}
 

@Override
public ITypeConstraint[] create(FieldAccess access){
	Expression expression= access.getExpression();
	SimpleName name= access.getName();
	IBinding binding= name.resolveBinding();
	if (! (binding instanceof IVariableBinding))
		return new ITypeConstraint[0];
	IVariableBinding vb= (IVariableBinding)binding;
	return createConstraintsForAccessToField(vb, expression, access);
}
 

public static SimpleName isSetter(MethodDeclaration methodDeclaration) {
	Block methodBody = methodDeclaration.getBody();
	List<SingleVariableDeclaration> parameters = methodDeclaration.parameters();
	if(methodBody != null) {
		List<Statement> statements = methodBody.statements();
		if(statements.size() == 1 && parameters.size() == 1) {
			Statement statement = statements.get(0);
    		if(statement instanceof ExpressionStatement) {
    			ExpressionStatement expressionStatement = (ExpressionStatement)statement;
    			Expression expressionStatementExpression = expressionStatement.getExpression();
    			if(expressionStatementExpression instanceof Assignment) {
    				Assignment assignment = (Assignment)expressionStatementExpression;
    				Expression rightHandSide = assignment.getRightHandSide();
    				if(rightHandSide instanceof SimpleName) {
    					SimpleName rightHandSideSimpleName = (SimpleName)rightHandSide;
    					if(rightHandSideSimpleName.resolveBinding().isEqualTo(parameters.get(0).resolveBinding())) {
    						Expression leftHandSide = assignment.getLeftHandSide();
    						if(leftHandSide instanceof SimpleName) {
    		    				return (SimpleName)leftHandSide;
    		    			}
    		    			else if(leftHandSide instanceof FieldAccess) {
    		    				FieldAccess fieldAccess = (FieldAccess)leftHandSide;
    		    				return fieldAccess.getName();
    		    			}
    					}
    				}
    			}
    		}
		}
	}
	return null;
}
 

public static boolean isLengthFieldAccess(Expression expression)
{
	SimpleName name          = null;
	ITypeBinding typeBinding = null;
	if (expression instanceof QualifiedName)
	{
		QualifiedName qualifiedName = (QualifiedName) expression;
		name                        = qualifiedName.getName();
		Name qualifier              = qualifiedName.getQualifier();
		typeBinding                 = qualifier.resolveTypeBinding();
	}
	else if (expression instanceof FieldAccess)
	{
		FieldAccess fieldAccess           = (FieldAccess)expression;
		name                              = fieldAccess.getName();
		Expression fieldAsccessExpression = fieldAccess.getExpression();
		typeBinding                       = fieldAsccessExpression.resolveTypeBinding();
	}
	if (name != null && typeBinding != null)
	{
		IBinding nameBinding = name.resolveBinding();
		if (nameBinding != null && nameBinding.getKind() == IBinding.VARIABLE && typeBinding != null)
		{
			IVariableBinding nameVariableBinding = (IVariableBinding) nameBinding;
			return (nameVariableBinding.getName().equals("length") && typeBinding.isArray());
		}
	}
	return false;
}
 

private Expression extractOperand(Expression operand) {
	if(operand instanceof SimpleName) {
		SimpleName operandSimpleName = (SimpleName)operand;
		return operandSimpleName;
	}
	else if(operand instanceof QualifiedName) {
		QualifiedName operandQualifiedName = (QualifiedName)operand;
		return operandQualifiedName.getName();
	}
	else if(operand instanceof FieldAccess) {
		FieldAccess operandFieldAccess = (FieldAccess)operand;
		return operandFieldAccess.getName();
	}
	else if(operand instanceof MethodInvocation) {
		MethodInvocation methodInvocation = (MethodInvocation)operand;
		for(MethodDeclaration method : methods) {
			SimpleName fieldInstruction = MethodDeclarationUtility.isGetter(method);
			if(fieldInstruction != null && method.resolveBinding().isEqualTo(methodInvocation.resolveMethodBinding())) {
				return fieldInstruction;
			}
			MethodInvocation delegateMethodInvocation = MethodDeclarationUtility.isDelegate(method);
			if(delegateMethodInvocation != null && method.resolveBinding().isEqualTo(methodInvocation.resolveMethodBinding())) {
				return delegateMethodInvocation;
			}
		}
		return methodInvocation;
	}
	return null;
}
 

/**
 * {@inheritDoc}
 */
@Override
public boolean visit(final FieldAccess node) {
	if (!fRemoveFieldQualifiers)
		return true;

	Expression expression= node.getExpression();
	if (!(expression instanceof ThisExpression))
		return true;

	final SimpleName name= node.getName();
	if (hasConflict(expression.getStartPosition(), name, ScopeAnalyzer.VARIABLES | ScopeAnalyzer.CHECK_VISIBILITY))
		return true;

	Name qualifier= ((ThisExpression) expression).getQualifier();
	if (qualifier != null) {
		ITypeBinding outerClass= (ITypeBinding) qualifier.resolveBinding();
		if (outerClass == null)
			return true;

		IVariableBinding nameBinding= (IVariableBinding) name.resolveBinding();
		if (nameBinding == null)
			return true;

		ITypeBinding variablesDeclaringClass= nameBinding.getDeclaringClass();
		if (outerClass != variablesDeclaringClass)
			//be conservative: We have a reference to a field of an outer type, and this type inherited
			//the field. It's possible that the inner type inherits the same field. We must not remove
			//the qualifier in this case.
			return true;
		
		ITypeBinding enclosingTypeBinding= Bindings.getBindingOfParentType(node);
		if (enclosingTypeBinding == null || Bindings.isSuperType(variablesDeclaringClass, enclosingTypeBinding))
			//We have a reference to a field of an outer type, and this type inherited
			//the field. The inner type inherits the same field. We must not remove
			//the qualifier in this case.
			return true;
	}

	fOperations.add(new CompilationUnitRewriteOperation() {
		@Override
		public void rewriteAST(CompilationUnitRewrite cuRewrite, LinkedProposalModel model) throws CoreException {
			ASTRewrite rewrite= cuRewrite.getASTRewrite();
			TextEditGroup group= createTextEditGroup(FixMessages.CodeStyleFix_removeThis_groupDescription, cuRewrite);
			rewrite.replace(node, rewrite.createCopyTarget(name), group);
		}
	});
	return super.visit(node);
}