Java Code Examples for org.eclipse.jdt.core.dom.Expression#getNodeType()

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;
}
 

public static boolean isResolvedTypeInferredFromExpectedType(Expression invocation) {
	if (invocation == null)
		return false;
	
	switch (invocation.getNodeType()) {
		case ASTNode.METHOD_INVOCATION:
			return ((MethodInvocation) invocation).isResolvedTypeInferredFromExpectedType();
		case ASTNode.SUPER_METHOD_INVOCATION:
			return ((SuperMethodInvocation) invocation).isResolvedTypeInferredFromExpectedType();
		case ASTNode.CLASS_INSTANCE_CREATION:
			return ((ClassInstanceCreation) invocation).isResolvedTypeInferredFromExpectedType();
			
		default:
			return false;
	}
}
 

private boolean isLiteralNodeSelected() throws JavaModelException {
	IExpressionFragment fragment= getSelectedExpression();
	if (fragment == null)
		return false;
	Expression expression= fragment.getAssociatedExpression();
	if (expression == null)
		return false;
	switch (expression.getNodeType()) {
		case ASTNode.BOOLEAN_LITERAL:
		case ASTNode.CHARACTER_LITERAL:
		case ASTNode.NULL_LITERAL:
		case ASTNode.NUMBER_LITERAL:
			return true;

		default:
			return false;
	}
}
 

private boolean isLiteralNodeSelected() throws JavaModelException {
	IExpressionFragment fragment= getSelectedExpression();
	if (fragment == null)
		return false;
	Expression expression= fragment.getAssociatedExpression();
	if (expression == null)
		return false;
	switch (expression.getNodeType()) {
		case ASTNode.BOOLEAN_LITERAL :
		case ASTNode.CHARACTER_LITERAL :
		case ASTNode.NULL_LITERAL :
		case ASTNode.NUMBER_LITERAL :
			return true;

		default :
			return false;
	}
}
 

@SuppressWarnings("unchecked")
private static boolean containsAnnotationValue(Expression annotationValue,
    String value) {
  if (annotationValue.getNodeType() == ASTNode.STRING_LITERAL) {
    String valueString = ((StringLiteral) annotationValue).getLiteralValue();
    return value.equals(valueString);
  } else if (annotationValue.getNodeType() == ASTNode.ARRAY_INITIALIZER) {
    // If the annotation value is actually an array, check each element
    List<Expression> warningTypes = ((ArrayInitializer) annotationValue).expressions();
    for (Expression warningType : warningTypes) {
      if (containsAnnotationValue(warningType, value)) {
        return true;
      }
    }
  }

  return false;
}
 

private Expression getAssignedValue(ParameterObjectFactory pof, String parameterName, IJavaProject javaProject, RefactoringStatus status, ASTRewrite rewrite, ParameterInfo pi, boolean useSuper, ITypeBinding typeBinding, Expression qualifier, ASTNode replaceNode, ITypeRoot typeRoot) {
	AST ast= rewrite.getAST();
	boolean is50OrHigher= JavaModelUtil.is50OrHigher(javaProject);
	Expression assignedValue= handleSimpleNameAssignment(replaceNode, pof, parameterName, ast, javaProject, useSuper);
	if (assignedValue == null) {
		NullLiteral marker= qualifier == null ? null : ast.newNullLiteral();
		Expression fieldReadAccess= pof.createFieldReadAccess(pi, parameterName, ast, javaProject, useSuper, marker);
		assignedValue= GetterSetterUtil.getAssignedValue(replaceNode, rewrite, fieldReadAccess, typeBinding, is50OrHigher);
		boolean markerReplaced= replaceMarker(rewrite, qualifier, assignedValue, marker);
		if (markerReplaced) {
			switch (qualifier.getNodeType()) {
				case ASTNode.METHOD_INVOCATION:
				case ASTNode.CLASS_INSTANCE_CREATION:
				case ASTNode.SUPER_METHOD_INVOCATION:
				case ASTNode.PARENTHESIZED_EXPRESSION:
					status.addWarning(RefactoringCoreMessages.ExtractClassRefactoring_warning_semantic_change, JavaStatusContext.create(typeRoot, replaceNode));
					break;
			}
		}
	}
	return assignedValue;
}
 

private Expression handleSimpleNameAssignment(ASTNode replaceNode, ParameterObjectFactory pof, String parameterName, AST ast, IJavaProject javaProject, boolean useSuper) {
	if (replaceNode instanceof Assignment) {
		Assignment assignment= (Assignment) replaceNode;
		Expression rightHandSide= assignment.getRightHandSide();
		if (rightHandSide.getNodeType() == ASTNode.SIMPLE_NAME) {
			SimpleName sn= (SimpleName) rightHandSide;
			IVariableBinding binding= ASTNodes.getVariableBinding(sn);
			if (binding != null && binding.isField()) {
				if (fDescriptor.getType().getFullyQualifiedName().equals(binding.getDeclaringClass().getQualifiedName())) {
					FieldInfo fieldInfo= getFieldInfo(binding.getName());
					if (fieldInfo != null && binding == fieldInfo.pi.getOldBinding()) {
						return pof.createFieldReadAccess(fieldInfo.pi, parameterName, ast, javaProject, useSuper, null);
					}
				}
			}
		}
	}
	return null;
}
 

public ExpressionVariable(Expression expression){
	super(expression.resolveTypeBinding());
	fSource= expression.toString();
	ICompilationUnit cu= ASTCreator.getCu(expression);
	Assert.isNotNull(cu);
	fRange= new CompilationUnitRange(cu, expression);
	fExpressionBinding= resolveBinding(expression);
	fExpressionType= expression.getNodeType();
}
 

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;
}
 

public static ListRewrite getInferredTypeArgumentsRewrite(ASTRewrite rewrite, Expression invocation) {
	switch (invocation.getNodeType()) {
		case ASTNode.METHOD_INVOCATION:
			return rewrite.getListRewrite(invocation, MethodInvocation.TYPE_ARGUMENTS_PROPERTY);
		case ASTNode.SUPER_METHOD_INVOCATION:
			return rewrite.getListRewrite(invocation, SuperMethodInvocation.TYPE_ARGUMENTS_PROPERTY);
		case ASTNode.CLASS_INSTANCE_CREATION:
			Type type= ((ClassInstanceCreation) invocation).getType();
			return rewrite.getListRewrite(type, ParameterizedType.TYPE_ARGUMENTS_PROPERTY);
			
		default:
			throw new IllegalArgumentException(invocation.toString());
	}
}
 

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;
}
 

public static ASTRewriteCorrectionProposal createCastProposal(IInvocationContext context, ITypeBinding castTypeBinding, Expression nodeToCast, int relevance) {
	ICompilationUnit cu= context.getCompilationUnit();

	String label;
	String castType= BindingLabelProviderCore.getBindingLabel(castTypeBinding, JavaElementLabels.ALL_DEFAULT);
	if (nodeToCast.getNodeType() == ASTNode.CAST_EXPRESSION) {
		label= Messages.format(CorrectionMessages.TypeMismatchSubProcessor_changecast_description, castType);
	} else {
		label= Messages.format(CorrectionMessages.TypeMismatchSubProcessor_addcast_description, castType);
	}
	return new CastCorrectionProposal(label, cu, nodeToCast, castTypeBinding, relevance);
}
 

/**
 * 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
		}
	}
}
 

public boolean match(VariableDeclarationStatement node, Object other) {
	List fragments = node.fragments();
	if(fragments.size() == 1 && other instanceof ExpressionStatement) {
		VariableDeclarationFragment fragment = (VariableDeclarationFragment)fragments.get(0);
		ExpressionStatement expressionStatement = (ExpressionStatement)other;
		Expression expression = expressionStatement.getExpression();
		if(expression instanceof Assignment) {
			Assignment assignment = (Assignment)expression;
			Expression leftHandSide = assignment.getLeftHandSide();
			if(leftHandSide instanceof SimpleName) {
				SimpleName simpleName = (SimpleName)leftHandSide;
				boolean variableMatch = safeSubtreeMatch(fragment.getName(), simpleName);
				boolean variableTypeMatch = false;
				IBinding simpleNameBinding = simpleName.resolveBinding();
				IBinding fragmentNameBinding = fragment.getName().resolveBinding();
				if(simpleNameBinding.getKind() == IBinding.VARIABLE && fragmentNameBinding.getKind() == IBinding.VARIABLE) {
					IVariableBinding simpleNameVariableBinding = (IVariableBinding)simpleNameBinding;
					IVariableBinding fragmentNameVariableBinding = (IVariableBinding)fragmentNameBinding;
					variableTypeMatch = simpleNameVariableBinding.getType().isEqualTo(fragmentNameVariableBinding.getType()) &&
							simpleNameVariableBinding.getType().getQualifiedName().equals(fragmentNameVariableBinding.getType().getQualifiedName());;
				}
				boolean initializerMatch = false;
				boolean initializerTypeMatch = false;
				Expression initializer = fragment.getInitializer();
				Expression rightHandSide = assignment.getRightHandSide();
				if(initializer != null && initializer.getNodeType() == rightHandSide.getNodeType()) {
					initializerMatch = safeSubtreeMatch(initializer, rightHandSide);
					initializerTypeMatch = initializer.resolveTypeBinding().isEqualTo(rightHandSide.resolveTypeBinding()) &&
							initializer.resolveTypeBinding().getQualifiedName().equals(rightHandSide.resolveTypeBinding().getQualifiedName());
				}
				if(variableMatch && variableTypeMatch && initializerMatch && initializerTypeMatch) {
					VariableDeclaration variableDeclaration = AbstractLoopUtilities.getVariableDeclaration(simpleName);
					if(variableDeclaration != null && hasEmptyInitializer(variableDeclaration)) {
						safeSubtreeMatch(fragment.getName(), variableDeclaration.getName());
						List<ASTNode> astNodes = new ArrayList<ASTNode>();
						astNodes.add(variableDeclaration);
						ASTInformationGenerator.setCurrentITypeRoot(typeRoot2);
						reportAdditionalFragments(astNodes, this.additionallyMatchedFragments2);
						return true;
					}
				}
			}
		}
	}
	return super.match(node, other);
}
 

/**
 * 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);
		}
	}
}
 

@Override
public boolean consumesLiteral(SemanticToken token) {
	Expression expr= token.getLiteral();
	return expr != null && expr.getNodeType() == ASTNode.NUMBER_LITERAL;
}
 

private void initReturnType(ImportRewrite rewriter) {
	AST ast = fEnclosingBodyDeclaration.getAST();
	fReturnType = null;
	fReturnTypeBinding = null;
	switch (fReturnKind) {
		case ACCESS_TO_LOCAL:
			VariableDeclaration declaration = ASTNodes.findVariableDeclaration(fReturnValue, fEnclosingBodyDeclaration);
			fReturnType = ASTNodeFactory.newType(ast, declaration, rewriter, new ContextSensitiveImportRewriteContext(declaration, rewriter));
			if (declaration.resolveBinding() != null) {
				fReturnTypeBinding = declaration.resolveBinding().getType();
			}
			break;
		case EXPRESSION:
			Expression expression = (Expression) getFirstSelectedNode();
			if (expression.getNodeType() == ASTNode.CLASS_INSTANCE_CREATION) {
				fExpressionBinding = ((ClassInstanceCreation) expression).getType().resolveBinding();
			} else {
				fExpressionBinding = expression.resolveTypeBinding();
			}
			if (fExpressionBinding != null) {
				if (fExpressionBinding.isNullType()) {
					getStatus().addFatalError(RefactoringCoreMessages.ExtractMethodAnalyzer_cannot_extract_null_type, JavaStatusContext.create(fCUnit, expression));
				} else {
					ITypeBinding normalizedBinding = Bindings.normalizeForDeclarationUse(fExpressionBinding, ast);
					if (normalizedBinding != null) {
						ImportRewriteContext context = new ContextSensitiveImportRewriteContext(fEnclosingBodyDeclaration, rewriter);
						fReturnType = rewriter.addImport(normalizedBinding, ast, context, TypeLocation.RETURN_TYPE);
						fReturnTypeBinding = normalizedBinding;
					}
				}
			} else {
				fReturnType = ast.newPrimitiveType(PrimitiveType.VOID);
				fReturnTypeBinding = ast.resolveWellKnownType("void"); //$NON-NLS-1$
				getStatus().addError(RefactoringCoreMessages.ExtractMethodAnalyzer_cannot_determine_return_type, JavaStatusContext.create(fCUnit, expression));
			}
			break;
		case RETURN_STATEMENT_VALUE:
			LambdaExpression enclosingLambdaExpr = ASTResolving.findEnclosingLambdaExpression(getFirstSelectedNode());
			if (enclosingLambdaExpr != null) {
				fReturnType = ASTNodeFactory.newReturnType(enclosingLambdaExpr, ast, rewriter, null);
				IMethodBinding methodBinding = enclosingLambdaExpr.resolveMethodBinding();
				fReturnTypeBinding = methodBinding != null ? methodBinding.getReturnType() : null;
			} else if (fEnclosingBodyDeclaration.getNodeType() == ASTNode.METHOD_DECLARATION) {
				fReturnType = ((MethodDeclaration) fEnclosingBodyDeclaration).getReturnType2();
				fReturnTypeBinding = fReturnType != null ? fReturnType.resolveBinding() : null;
			}
			break;
		default:
			fReturnType = ast.newPrimitiveType(PrimitiveType.VOID);
			fReturnTypeBinding = ast.resolveWellKnownType("void"); //$NON-NLS-1$
	}
	if (fReturnType == null) {
		fReturnType = ast.newPrimitiveType(PrimitiveType.VOID);
		fReturnTypeBinding = ast.resolveWellKnownType("void"); //$NON-NLS-1$
	}
}
 

private void initReturnType(ImportRewrite rewriter) {
	AST ast= fEnclosingBodyDeclaration.getAST();
	fReturnType= null;
	fReturnTypeBinding= null;
	switch (fReturnKind) {
		case ACCESS_TO_LOCAL:
			VariableDeclaration declaration= ASTNodes.findVariableDeclaration(fReturnValue, fEnclosingBodyDeclaration);
			fReturnType= ASTNodeFactory.newType(ast, declaration, rewriter, new ContextSensitiveImportRewriteContext(declaration, rewriter));
			if (declaration.resolveBinding() != null) {
				fReturnTypeBinding= declaration.resolveBinding().getType();
			}
			break;
		case EXPRESSION:
			Expression expression= (Expression)getFirstSelectedNode();
			if (expression.getNodeType() == ASTNode.CLASS_INSTANCE_CREATION) {
				fExpressionBinding= ((ClassInstanceCreation)expression).getType().resolveBinding();
			} else {
				fExpressionBinding= expression.resolveTypeBinding();
			}
			if (fExpressionBinding != null) {
				if (fExpressionBinding.isNullType()) {
					getStatus().addFatalError(RefactoringCoreMessages.ExtractMethodAnalyzer_cannot_extract_null_type, JavaStatusContext.create(fCUnit, expression));
				} else {
					ITypeBinding normalizedBinding= Bindings.normalizeForDeclarationUse(fExpressionBinding, ast);
					if (normalizedBinding != null) {
						ImportRewriteContext context= new ContextSensitiveImportRewriteContext(fEnclosingBodyDeclaration, rewriter);
						fReturnType= rewriter.addImport(normalizedBinding, ast, context);
						fReturnTypeBinding= normalizedBinding;
					}
				}
			} else {
				fReturnType= ast.newPrimitiveType(PrimitiveType.VOID);
				fReturnTypeBinding= ast.resolveWellKnownType("void"); //$NON-NLS-1$
				getStatus().addError(RefactoringCoreMessages.ExtractMethodAnalyzer_cannot_determine_return_type, JavaStatusContext.create(fCUnit, expression));
			}
			break;
		case RETURN_STATEMENT_VALUE:
			LambdaExpression enclosingLambdaExpr= ASTResolving.findEnclosingLambdaExpression(getFirstSelectedNode());
			if (enclosingLambdaExpr != null) {
				fReturnType= ASTNodeFactory.newReturnType(enclosingLambdaExpr, ast, rewriter, null);
				IMethodBinding methodBinding= enclosingLambdaExpr.resolveMethodBinding();
				fReturnTypeBinding= methodBinding != null ? methodBinding.getReturnType() : null;
			} else if (fEnclosingBodyDeclaration.getNodeType() == ASTNode.METHOD_DECLARATION) {
				fReturnType= ((MethodDeclaration) fEnclosingBodyDeclaration).getReturnType2();
				fReturnTypeBinding= fReturnType != null ? fReturnType.resolveBinding() : null;
			}
			break;
		default:
			fReturnType= ast.newPrimitiveType(PrimitiveType.VOID);
			fReturnTypeBinding= ast.resolveWellKnownType("void"); //$NON-NLS-1$
	}
	if (fReturnType == null) {
		fReturnType= ast.newPrimitiveType(PrimitiveType.VOID);
		fReturnTypeBinding= ast.resolveWellKnownType("void"); //$NON-NLS-1$
	}
}
 

public ConstraintVariable makeExpressionOrTypeVariable(Expression expression,
												       IContext context) {
	IBinding binding= ExpressionVariable.resolveBinding(expression);

	if (binding instanceof ITypeBinding){
		ICompilationUnit cu= ASTCreator.getCu(expression);
		Assert.isNotNull(cu);
		CompilationUnitRange range= new CompilationUnitRange(cu, expression);
		return makeTypeVariable((ITypeBinding)getKey(binding), expression.toString(), range);
	}

	if (ASTNodes.isLiteral(expression)){
		Integer nodeType= new Integer(expression.getNodeType());
		if (! fLiteralMap.containsKey(nodeType)){
			fLiteralMap.put(nodeType, new ExpressionVariable(expression));
			if (REPORT) nrCreated++;
		} else {
			if (REPORT) nrRetrieved++;
		}
		if (REPORT) dumpConstraintStats();
		return fLiteralMap.get(nodeType);
	}

	// For ExpressionVariables, there are two cases. If the expression has a binding
	// we use that as the key. Otherwise, we use the CompilationUnitRange. See
	// also ExpressionVariable.equals()
	ExpressionVariable ev;
	Object key;
	if (binding != null){
		key= getKey(binding);
	} else {
		key= new CompilationUnitRange(ASTCreator.getCu(expression), expression);
	}
	ev= fExpressionMap.get(key);

	if (ev != null){
		if (REPORT) nrRetrieved++;
	} else {
		ev= new ExpressionVariable(expression);
		fExpressionMap.put(key, ev);
		if (REPORT) nrCreated++;
		if (REPORT) dumpConstraintStats();
	}
	return ev;
}