Java Code Examples for org.eclipse.jdt.core.dom.ASTNode#ASSIGNMENT

public static CUCorrectionProposal getAssignVariableProposal(CodeActionParams params, IInvocationContext context, boolean problemsAtLocation, Map formatterOptions, boolean returnAsCommand,
		IProblemLocationCore[] locations)
		throws CoreException {
	ASTNode node = context.getCoveringNode();
	Statement statement = ASTResolving.findParentStatement(node);
	if (!(statement instanceof ExpressionStatement)) {
		return null;
	}
	ExpressionStatement expressionStatement = (ExpressionStatement) statement;
	Expression expression = expressionStatement.getExpression();
	if (expression.getNodeType() == ASTNode.ASSIGNMENT) {
		return null;
	}
	ITypeBinding typeBinding = expression.resolveTypeBinding();
	typeBinding = Bindings.normalizeTypeBinding(typeBinding);
	if (typeBinding == null) {
		return null;
	}
	if (containsMatchingProblem(locations, IProblem.UnusedObjectAllocation)) {
		return null;
	}
	final ICompilationUnit cu = context.getCompilationUnit();
	int relevance;
	if (context.getSelectionLength() == 0) {
		relevance = IProposalRelevance.EXTRACT_LOCAL_ZERO_SELECTION;
	} else if (problemsAtLocation) {
		relevance = IProposalRelevance.EXTRACT_LOCAL_ERROR;
	} else {
		relevance = IProposalRelevance.EXTRACT_LOCAL;
	}
	if (returnAsCommand) {
		return new AssignToVariableAssistCommandProposal(cu, JavaCodeActionKind.REFACTOR_ASSIGN_VARIABLE, AssignToVariableAssistProposal.LOCAL, expressionStatement, typeBinding, relevance, APPLY_REFACTORING_COMMAND_ID,
				Arrays.asList(ASSIGN_VARIABLE_COMMAND, params));
	} else {
		return new AssignToVariableAssistProposal(cu, JavaCodeActionKind.REFACTOR_ASSIGN_VARIABLE, AssignToVariableAssistProposal.LOCAL, expressionStatement, typeBinding, relevance);
	}
}
 

public static CUCorrectionProposal getAssignFieldProposal(CodeActionParams params, IInvocationContext context, boolean problemsAtLocation, Map formatterOptions, boolean returnAsCommand,
		IProblemLocationCore[] locations) throws CoreException {
	ASTNode node = context.getCoveringNode();
	Statement statement = ASTResolving.findParentStatement(node);
	if (!(statement instanceof ExpressionStatement)) {
		return null;
	}
	ExpressionStatement expressionStatement = (ExpressionStatement) statement;
	Expression expression = expressionStatement.getExpression();
	if (expression.getNodeType() == ASTNode.ASSIGNMENT) {
		return null;
	}
	ITypeBinding typeBinding = expression.resolveTypeBinding();
	typeBinding = Bindings.normalizeTypeBinding(typeBinding);
	if (typeBinding == null) {
		return null;
	}
	if (containsMatchingProblem(locations, IProblem.UnusedObjectAllocation)) {
		return null;
	}
	final ICompilationUnit cu = context.getCompilationUnit();
	ASTNode type = ASTResolving.findParentType(expression);
	if (type != null) {
		int relevance;
		if (context.getSelectionLength() == 0) {
			relevance = IProposalRelevance.EXTRACT_LOCAL_ZERO_SELECTION;
		} else if (problemsAtLocation) {
			relevance = IProposalRelevance.EXTRACT_LOCAL_ERROR;
		} else {
			relevance = IProposalRelevance.EXTRACT_LOCAL;
		}
		if (returnAsCommand) {
			return new AssignToVariableAssistCommandProposal(cu, JavaCodeActionKind.REFACTOR_ASSIGN_FIELD, AssignToVariableAssistProposal.FIELD, expressionStatement, typeBinding, relevance, APPLY_REFACTORING_COMMAND_ID,
					Arrays.asList(ASSIGN_FIELD_COMMAND, params));
		} else {
			return new AssignToVariableAssistProposal(cu, JavaCodeActionKind.REFACTOR_ASSIGN_FIELD, AssignToVariableAssistProposal.FIELD, expressionStatement, typeBinding, relevance);
		}
	}
	return null;
}
 

private static boolean needsInnerParantheses(ASTNode nodeToCast) {
	int nodeType= nodeToCast.getNodeType();

	// nodes have weaker precedence than cast
	return nodeType == ASTNode.INFIX_EXPRESSION || nodeType == ASTNode.CONDITIONAL_EXPRESSION
			|| nodeType == ASTNode.ASSIGNMENT || nodeType == ASTNode.INSTANCEOF_EXPRESSION;
}
 

private static boolean expressionTypeNeedsParentheses(Expression expression) {
	int type= expression.getNodeType();
	return type == ASTNode.INFIX_EXPRESSION
			|| type == ASTNode.CONDITIONAL_EXPRESSION
			|| type == ASTNode.PREFIX_EXPRESSION
			|| type == ASTNode.POSTFIX_EXPRESSION
			|| type == ASTNode.CAST_EXPRESSION
			|| type == ASTNode.INSTANCEOF_EXPRESSION
			|| type == ASTNode.ARRAY_CREATION
			|| type == ASTNode.ASSIGNMENT;
}
 

private static boolean hasSideEffect(SimpleName reference) {
	ASTNode parent= reference.getParent();
	while (parent instanceof QualifiedName) {
		parent= parent.getParent();
	}
	if (parent instanceof FieldAccess) {
		parent= parent.getParent();
	}

	ASTNode node= null;
	int nameParentType= parent.getNodeType();
	if (nameParentType == ASTNode.ASSIGNMENT) {
		Assignment assignment= (Assignment) parent;
		node= assignment.getRightHandSide();
	} else if (nameParentType == ASTNode.SINGLE_VARIABLE_DECLARATION) {
		SingleVariableDeclaration decl= (SingleVariableDeclaration)parent;
		node= decl.getInitializer();
		if (node == null)
			return false;
	} else if (nameParentType == ASTNode.VARIABLE_DECLARATION_FRAGMENT) {
		node= parent;
	} else {
		return false;
	}

	ArrayList<Expression> sideEffects= new ArrayList<Expression>();
	node.accept(new SideEffectFinder(sideEffects));
	return sideEffects.size() > 0;
}
 

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;
}
 

public static boolean getAssignToVariableProposals(IInvocationContext context, ASTNode node, IProblemLocation[] locations, Collection<ICommandAccess> resultingCollections) {
	Statement statement= ASTResolving.findParentStatement(node);
	if (!(statement instanceof ExpressionStatement)) {
		return false;
	}
	ExpressionStatement expressionStatement= (ExpressionStatement) statement;

	Expression expression= expressionStatement.getExpression();
	if (expression.getNodeType() == ASTNode.ASSIGNMENT) {
		return false; // too confusing and not helpful
	}

	ITypeBinding typeBinding= expression.resolveTypeBinding();
	typeBinding= Bindings.normalizeTypeBinding(typeBinding);
	if (typeBinding == null) {
		return false;
	}
	if (resultingCollections == null) {
		return true;
	}

	// don't add if already added as quick fix
	if (containsMatchingProblem(locations, IProblem.UnusedObjectAllocation))
		return false;
	
	ICompilationUnit cu= context.getCompilationUnit();

	AssignToVariableAssistProposal localProposal= new AssignToVariableAssistProposal(cu, AssignToVariableAssistProposal.LOCAL, expressionStatement, typeBinding, IProposalRelevance.ASSIGN_TO_LOCAL);
	localProposal.setCommandId(ASSIGN_TO_LOCAL_ID);
	resultingCollections.add(localProposal);

	ASTNode type= ASTResolving.findParentType(expression);
	if (type != null) {
		AssignToVariableAssistProposal fieldProposal= new AssignToVariableAssistProposal(cu, AssignToVariableAssistProposal.FIELD, expressionStatement, typeBinding, IProposalRelevance.ASSIGN_TO_FIELD);
		fieldProposal.setCommandId(ASSIGN_TO_FIELD_ID);
		resultingCollections.add(fieldProposal);
	}
	return true;

}
 

private static boolean needsInnerParantheses(ASTNode nodeToCast) {
	int nodeType= nodeToCast.getNodeType();

	// nodes have weaker precedence than cast
	return nodeType == ASTNode.INFIX_EXPRESSION || nodeType == ASTNode.CONDITIONAL_EXPRESSION
	|| nodeType == ASTNode.ASSIGNMENT || nodeType == ASTNode.INSTANCEOF_EXPRESSION;
}
 

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());
  }
}
 

private void parseExpression(MethodInfo methodInfo, Expression expression) {
    if (expression == null) {
        return;
    }//System.out.println(expression.toString()+" "+Annotation.nodeClassForType(expression.getNodeType()));
    if (expression.getNodeType() == ASTNode.ARRAY_INITIALIZER) {
        List<Expression> expressions = ((ArrayInitializer) expression).expressions();
        for (Expression expression2 : expressions) {
            parseExpression(methodInfo, expression2);
        }
    }
    if (expression.getNodeType() == ASTNode.CAST_EXPRESSION) {
        parseExpression(methodInfo, ((CastExpression) expression).getExpression());
    }
    if (expression.getNodeType() == ASTNode.CONDITIONAL_EXPRESSION) {
        parseExpression(methodInfo, ((ConditionalExpression) expression).getExpression());
        parseExpression(methodInfo, ((ConditionalExpression) expression).getElseExpression());
        parseExpression(methodInfo, ((ConditionalExpression) expression).getThenExpression());
    }
    if (expression.getNodeType() == ASTNode.INFIX_EXPRESSION) {
        parseExpression(methodInfo, ((InfixExpression) expression).getLeftOperand());
        parseExpression(methodInfo, ((InfixExpression) expression).getRightOperand());
    }
    if (expression.getNodeType() == ASTNode.INSTANCEOF_EXPRESSION) {
        parseExpression(methodInfo, ((InstanceofExpression) expression).getLeftOperand());
    }
    if (expression.getNodeType() == ASTNode.PARENTHESIZED_EXPRESSION) {
        parseExpression(methodInfo, ((ParenthesizedExpression) expression).getExpression());
    }
    if (expression.getNodeType() == ASTNode.POSTFIX_EXPRESSION) {
        parseExpression(methodInfo, ((PostfixExpression) expression).getOperand());
    }
    if (expression.getNodeType() == ASTNode.PREFIX_EXPRESSION) {
        parseExpression(methodInfo, ((PrefixExpression) expression).getOperand());
    }
    if (expression.getNodeType() == ASTNode.THIS_EXPRESSION) {
        parseExpression(methodInfo, ((ThisExpression) expression).getQualifier());
    }
    if (expression.getNodeType() == ASTNode.METHOD_INVOCATION) {
        List<Expression> arguments = ((MethodInvocation) expression).arguments();
        IMethodBinding methodBinding = ((MethodInvocation) expression).resolveMethodBinding();
        if (methodBinding != null)
            methodInfo.methodCalls.add(methodBinding);
        for (Expression exp : arguments)
            parseExpression(methodInfo, exp);
        parseExpression(methodInfo, ((MethodInvocation) expression).getExpression());
    }
    if (expression.getNodeType() == ASTNode.ASSIGNMENT) {
        parseExpression(methodInfo, ((Assignment) expression).getLeftHandSide());
        parseExpression(methodInfo, ((Assignment) expression).getRightHandSide());
    }
    if (expression.getNodeType() == ASTNode.QUALIFIED_NAME) {
        if (((QualifiedName) expression).getQualifier().resolveTypeBinding() != null) {
            String name = ((QualifiedName) expression).getQualifier().resolveTypeBinding().getQualifiedName() + "." + ((QualifiedName) expression).getName().getIdentifier();
            methodInfo.fieldUsesSet.add(name);
        }
        parseExpression(methodInfo, ((QualifiedName) expression).getQualifier());
    }
}
 

/**
 * Converts an assignment, postfix expression or prefix expression into an assignable equivalent expression using the getter.
 *
 * @param node the assignment/prefix/postfix node
 * @param astRewrite the astRewrite to use
 * @param getterExpression the expression to insert for read accesses or <code>null</code> if such an expression does not exist
 * @param variableType the type of the variable that the result will be assigned to
 * @param is50OrHigher <code>true</code> if a 5.0 or higher environment can be used
 * @return an expression that can be assigned to the type variableType with node being replaced by a equivalent expression using the getter
 */
public static Expression getAssignedValue(ASTNode node, ASTRewrite astRewrite, Expression getterExpression, ITypeBinding variableType, boolean is50OrHigher) {
	InfixExpression.Operator op= null;
	AST ast= astRewrite.getAST();
	if (isNotInBlock(node))
		return null;
	if (node.getNodeType() == ASTNode.ASSIGNMENT) {
		Assignment assignment= ((Assignment) node);
		Expression rightHandSide= assignment.getRightHandSide();
		Expression copiedRightOp= (Expression) astRewrite.createCopyTarget(rightHandSide);
		if (assignment.getOperator() == Operator.ASSIGN) {
			ITypeBinding rightHandSideType= rightHandSide.resolveTypeBinding();
			copiedRightOp= createNarrowCastIfNessecary(copiedRightOp, rightHandSideType, ast, variableType, is50OrHigher);
			return copiedRightOp;
		}
		if (getterExpression != null) {
			InfixExpression infix= ast.newInfixExpression();
			infix.setLeftOperand(getterExpression);
			infix.setOperator(ASTNodes.convertToInfixOperator(assignment.getOperator()));
			ITypeBinding infixType= infix.resolveTypeBinding();
			if (NecessaryParenthesesChecker.needsParenthesesForRightOperand(rightHandSide, infix, variableType)) {
				ParenthesizedExpression p= ast.newParenthesizedExpression();
				p.setExpression(copiedRightOp);
				copiedRightOp= p;
			}
			infix.setRightOperand(copiedRightOp);
			return createNarrowCastIfNessecary(infix, infixType, ast, variableType, is50OrHigher);
		}
	} else if (node.getNodeType() == ASTNode.POSTFIX_EXPRESSION) {
		PostfixExpression po= (PostfixExpression) node;
		if (po.getOperator() == PostfixExpression.Operator.INCREMENT)
			op= InfixExpression.Operator.PLUS;
		if (po.getOperator() == PostfixExpression.Operator.DECREMENT)
			op= InfixExpression.Operator.MINUS;
	} else if (node.getNodeType() == ASTNode.PREFIX_EXPRESSION) {
		PrefixExpression pe= (PrefixExpression) node;
		if (pe.getOperator() == PrefixExpression.Operator.INCREMENT)
			op= InfixExpression.Operator.PLUS;
		if (pe.getOperator() == PrefixExpression.Operator.DECREMENT)
			op= InfixExpression.Operator.MINUS;
	}
	if (op != null && getterExpression != null) {
		return createInfixInvocationFromPostPrefixExpression(op, getterExpression, ast, variableType, is50OrHigher);
	}
	return null;
}
 

/**
 * Remove the field or variable declaration including the initializer.
 * @param rewrite the AST rewriter to use
 * @param reference a reference to the variable to remove
 * @param group the text edit group to use
 */
private void removeVariableReferences(ASTRewrite rewrite, SimpleName reference, TextEditGroup group) {
	ASTNode parent= reference.getParent();
	while (parent instanceof QualifiedName) {
		parent= parent.getParent();
	}
	if (parent instanceof FieldAccess) {
		parent= parent.getParent();
	}

	int nameParentType= parent.getNodeType();
	if (nameParentType == ASTNode.ASSIGNMENT) {
		Assignment assignment= (Assignment) parent;
		Expression rightHand= assignment.getRightHandSide();

		ASTNode assignParent= assignment.getParent();
		if (assignParent.getNodeType() == ASTNode.EXPRESSION_STATEMENT && rightHand.getNodeType() != ASTNode.ASSIGNMENT) {
			removeVariableWithInitializer(rewrite, rightHand, assignParent, group);
		}	else {
			rewrite.replace(assignment, rewrite.createCopyTarget(rightHand), group);
		}
	} else if (nameParentType == ASTNode.SINGLE_VARIABLE_DECLARATION) {
		rewrite.remove(parent, group);
	} else if (nameParentType == ASTNode.VARIABLE_DECLARATION_FRAGMENT) {
		VariableDeclarationFragment frag= (VariableDeclarationFragment) parent;
		ASTNode varDecl= frag.getParent();
		List<VariableDeclarationFragment> fragments;
		if (varDecl instanceof VariableDeclarationExpression) {
			fragments= ((VariableDeclarationExpression) varDecl).fragments();
		} else if (varDecl instanceof FieldDeclaration) {
			fragments= ((FieldDeclaration) varDecl).fragments();
		} else {
			fragments= ((VariableDeclarationStatement) varDecl).fragments();
		}
		Expression initializer = frag.getInitializer();
		ArrayList<Expression> sideEffects= new ArrayList<Expression>();
		if (initializer != null) {
			initializer.accept(new SideEffectFinder(sideEffects));
		}
		boolean sideEffectInitializer= sideEffects.size() > 0;
		if (fragments.size() == fUnusedNames.length) {
			if (fForceRemove) {
				rewrite.remove(varDecl, group);
				return;
			}
			if (parent.getParent() instanceof FieldDeclaration) {
				rewrite.remove(varDecl, group);
				return;
			}
			if (sideEffectInitializer) {
				Statement[] wrapped= new Statement[sideEffects.size()];
				for (int i= 0; i < wrapped.length; i++) {
					Expression sideEffect= sideEffects.get(i);
					Expression movedInit= (Expression) rewrite.createMoveTarget(sideEffect);
					wrapped[i]= rewrite.getAST().newExpressionStatement(movedInit);
				}
				StatementRewrite statementRewrite= new StatementRewrite(rewrite, new ASTNode[] { varDecl });
				statementRewrite.replace(wrapped, group);
			} else {
				rewrite.remove(varDecl, group);
			}
		} else {
			if (fForceRemove) {
				rewrite.remove(frag, group);
				return;
			}
			//multiple declarations in one line
			ASTNode declaration = parent.getParent();
			if (declaration instanceof FieldDeclaration) {
				rewrite.remove(frag, group);
				return;
			}
			if (declaration instanceof VariableDeclarationStatement) {
				splitUpDeclarations(rewrite, group, frag, (VariableDeclarationStatement) declaration, sideEffects);
				rewrite.remove(frag, group);
				return;
			}
			if (declaration instanceof VariableDeclarationExpression) {
				//keep constructors and method invocations
				if (!sideEffectInitializer){
					rewrite.remove(frag, group);
				}
			}
		}
	} else if (nameParentType == ASTNode.POSTFIX_EXPRESSION || nameParentType == ASTNode.PREFIX_EXPRESSION) {
		Expression expression= (Expression)parent;
		ASTNode expressionParent= expression.getParent();
		if (expressionParent.getNodeType() == ASTNode.EXPRESSION_STATEMENT) {
			removeStatement(rewrite, expressionParent, group);
		} else {
			rewrite.remove(expression, group);
		}
	}
}
 

/**
 * Remove the field or variable declaration including the initializer.
 * @param rewrite the ast rewrite
 * @param reference the reference
 */
private void removeVariableReferences(ASTRewrite rewrite, SimpleName reference) {
	ASTNode parent= reference.getParent();
	while (parent instanceof QualifiedName) {
		parent= parent.getParent();
	}
	if (parent instanceof FieldAccess) {
		parent= parent.getParent();
	}

	int nameParentType= parent.getNodeType();
	if (nameParentType == ASTNode.ASSIGNMENT) {
		Assignment assignment= (Assignment) parent;
		Expression rightHand= assignment.getRightHandSide();

		ASTNode assignParent= assignment.getParent();
		if (assignParent.getNodeType() == ASTNode.EXPRESSION_STATEMENT && rightHand.getNodeType() != ASTNode.ASSIGNMENT) {
			removeVariableWithInitializer(rewrite, rightHand, assignParent);
		}	else {
			rewrite.replace(assignment, rewrite.createCopyTarget(rightHand), null);
		}
	} else if (nameParentType == ASTNode.SINGLE_VARIABLE_DECLARATION) {
		rewrite.remove(parent, null);
	} else if (nameParentType == ASTNode.VARIABLE_DECLARATION_FRAGMENT) {
		VariableDeclarationFragment frag= (VariableDeclarationFragment) parent;
		ASTNode varDecl= frag.getParent();
		List<VariableDeclarationFragment> fragments;
		if (varDecl instanceof VariableDeclarationExpression) {
			fragments= ((VariableDeclarationExpression) varDecl).fragments();
		} else if (varDecl instanceof FieldDeclaration) {
			fragments= ((FieldDeclaration) varDecl).fragments();
		} else {
			fragments= ((VariableDeclarationStatement) varDecl).fragments();
		}
		if (fragments.size() == 1) {
			rewrite.remove(varDecl, null);
		} else {
			rewrite.remove(frag, null); // don't try to preserve
		}
	}
}