private static boolean canAddFinal(IBinding binding, ASTNode declNode) {
if (!(binding instanceof IVariableBinding)) return false;
IVariableBinding varbinding = (IVariableBinding) binding;
int modifiers = varbinding.getModifiers();
if (Modifier.isFinal(modifiers)
|| Modifier.isVolatile(modifiers)
|| Modifier.isTransient(modifiers)) return false;
ASTNode parent = ASTNodes.getParent(declNode, VariableDeclarationExpression.class);
if (parent != null && ((VariableDeclarationExpression) parent).fragments().size() > 1)
return false;
if (varbinding.isField() && !Modifier.isPrivate(modifiers)) return false;
if (varbinding.isParameter()) {
ASTNode varDecl = declNode.getParent();
if (varDecl instanceof MethodDeclaration) {
MethodDeclaration declaration = (MethodDeclaration) varDecl;
if (declaration.getBody() == null) return false;
}
}
return true;
}
/**
* Returns the type to which the new constant will be added to. It is the first non-anonymous
* parent.
*
* @return the type to add the new constant to
* @throws JavaModelException shouldn't happen
*/
private AbstractTypeDeclaration getContainingTypeDeclarationNode() throws JavaModelException {
AbstractTypeDeclaration result =
(AbstractTypeDeclaration)
ASTNodes.getParent(
getSelectedExpression().getAssociatedNode(), AbstractTypeDeclaration.class);
Assert.isNotNull(result);
return result;
}
private static VariableDeclaration getVariableDeclaration(Name node) {
IBinding binding = node.resolveBinding();
if (binding == null && node.getParent() instanceof VariableDeclaration)
return (VariableDeclaration) node.getParent();
if (binding != null && binding.getKind() == IBinding.VARIABLE) {
CompilationUnit cu = (CompilationUnit) ASTNodes.getParent(node, CompilationUnit.class);
return ASTNodes.findVariableDeclaration(((IVariableBinding) binding), cu);
}
return null;
}
public static ASTNode getEnclosingNode(ASTNode firstSelectedNode) {
ASTNode enclosingNode;
if (firstSelectedNode instanceof MethodReference) {
enclosingNode = firstSelectedNode;
} else {
enclosingNode = ASTResolving.findEnclosingLambdaExpression(firstSelectedNode);
if (enclosingNode != null) {
enclosingNode = ((LambdaExpression) enclosingNode).getBody();
} else {
enclosingNode = ASTNodes.getParent(firstSelectedNode, BodyDeclaration.class);
}
}
return enclosingNode;
}
private MethodDeclaration getWritingConstructor(SimpleName name) {
Assignment assignement = (Assignment) ASTNodes.getParent(name, Assignment.class);
if (assignement == null) return null;
ASTNode expression = assignement.getParent();
if (!(expression instanceof ExpressionStatement)) return null;
ASTNode block = expression.getParent();
if (!(block instanceof Block)) return null;
ASTNode methodDeclaration = block.getParent();
if (!(methodDeclaration instanceof MethodDeclaration)) return null;
return (MethodDeclaration) methodDeclaration;
}
private void checkExpression(RefactoringStatus status) {
ASTNode[] nodes = getSelectedNodes();
if (nodes != null && nodes.length == 1) {
ASTNode node = nodes[0];
if (node instanceof Type) {
status.addFatalError(
RefactoringCoreMessages.ExtractMethodAnalyzer_cannot_extract_type_reference,
JavaStatusContext.create(fCUnit, node));
} else if (node.getLocationInParent() == SwitchCase.EXPRESSION_PROPERTY) {
status.addFatalError(
RefactoringCoreMessages.ExtractMethodAnalyzer_cannot_extract_switch_case,
JavaStatusContext.create(fCUnit, node));
} else if (node instanceof Annotation || ASTNodes.getParent(node, Annotation.class) != null) {
status.addFatalError(
RefactoringCoreMessages.ExtractMethodAnalyzer_cannot_extract_from_annotation,
JavaStatusContext.create(fCUnit, node));
}
}
}
private boolean fieldCanBeFinal(
VariableDeclarationFragment fragment, IVariableBinding binding) {
if (Modifier.isStatic(((FieldDeclaration) fragment.getParent()).getModifiers())) return false;
if (!fWrittenVariables.containsKey(binding)) {
// variable is not written
if (fragment.getInitializer() == null) { // variable is not initialized
return false;
} else {
return true;
}
}
if (fragment.getInitializer() != null) // variable is initialized and written
return false;
ITypeBinding declaringClass = binding.getDeclaringClass();
if (declaringClass == null) return false;
ArrayList writes = (ArrayList) fWrittenVariables.get(binding);
if (!isWrittenInTypeConstructors(writes, declaringClass)) return false;
HashSet writingConstructorBindings = new HashSet();
ArrayList writingConstructors = new ArrayList();
for (int i = 0; i < writes.size(); i++) {
SimpleName name = (SimpleName) writes.get(i);
MethodDeclaration constructor = getWritingConstructor(name);
if (writingConstructors.contains(
constructor)) // variable is written twice or more in constructor
return false;
if (canReturn(constructor)) return false;
writingConstructors.add(constructor);
IMethodBinding constructorBinding = constructor.resolveBinding();
if (constructorBinding == null) return false;
writingConstructorBindings.add(constructorBinding);
}
for (int i = 0; i < writingConstructors.size(); i++) {
MethodDeclaration constructor = (MethodDeclaration) writingConstructors.get(i);
if (callsWritingConstructor(
constructor,
writingConstructorBindings)) // writing constructor calls other writing constructor
return false;
}
MethodDeclaration constructor = (MethodDeclaration) writingConstructors.get(0);
TypeDeclaration typeDecl =
(TypeDeclaration) ASTNodes.getParent(constructor, TypeDeclaration.class);
if (typeDecl == null) return false;
MethodDeclaration[] methods = typeDecl.getMethods();
for (int i = 0; i < methods.length; i++) {
if (methods[i].isConstructor()) {
IMethodBinding methodBinding = methods[i].resolveBinding();
if (methodBinding == null) return false;
if (!writingConstructorBindings.contains(methodBinding)) {
if (!callsWritingConstructor(
methods[i],
writingConstructorBindings)) // non writing constructor does not call a writing
// constructor
return false;
}
}
}
return true;
}
@Override
public void endVisit(CompilationUnit node) {
RefactoringStatus status = getStatus();
superCall:
{
if (status.hasFatalError()) break superCall;
if (!hasSelectedNodes()) {
ASTNode coveringNode = getLastCoveringNode();
if (coveringNode instanceof Block
&& coveringNode.getParent() instanceof MethodDeclaration) {
MethodDeclaration methodDecl = (MethodDeclaration) coveringNode.getParent();
Message[] messages = ASTNodes.getMessages(methodDecl, ASTNodes.NODE_ONLY);
if (messages.length > 0) {
status.addFatalError(
Messages.format(
RefactoringCoreMessages.ExtractMethodAnalyzer_compile_errors,
BasicElementLabels.getJavaElementName(methodDecl.getName().getIdentifier())),
JavaStatusContext.create(fCUnit, methodDecl));
break superCall;
}
}
status.addFatalError(RefactoringCoreMessages.ExtractMethodAnalyzer_invalid_selection);
break superCall;
}
fEnclosingBodyDeclaration =
(BodyDeclaration) ASTNodes.getParent(getFirstSelectedNode(), BodyDeclaration.class);
if (fEnclosingBodyDeclaration == null
|| (fEnclosingBodyDeclaration.getNodeType() != ASTNode.METHOD_DECLARATION
&& fEnclosingBodyDeclaration.getNodeType() != ASTNode.FIELD_DECLARATION
&& fEnclosingBodyDeclaration.getNodeType() != ASTNode.INITIALIZER)) {
status.addFatalError(RefactoringCoreMessages.ExtractMethodAnalyzer_invalid_selection);
break superCall;
} else if (ASTNodes.getEnclosingType(fEnclosingBodyDeclaration) == null) {
status.addFatalError(
RefactoringCoreMessages.ExtractMethodAnalyzer_compile_errors_no_parent_binding);
break superCall;
} else if (fEnclosingBodyDeclaration.getNodeType() == ASTNode.METHOD_DECLARATION) {
fEnclosingMethodBinding = ((MethodDeclaration) fEnclosingBodyDeclaration).resolveBinding();
}
if (!isSingleExpressionOrStatementSet()) {
status.addFatalError(
RefactoringCoreMessages.ExtractMethodAnalyzer_single_expression_or_set);
break superCall;
}
if (isExpressionSelected()) {
ASTNode expression = getFirstSelectedNode();
if (expression instanceof Name) {
Name name = (Name) expression;
if (name.resolveBinding() instanceof ITypeBinding) {
status.addFatalError(
RefactoringCoreMessages.ExtractMethodAnalyzer_cannot_extract_type_reference);
break superCall;
}
if (name.resolveBinding() instanceof IMethodBinding) {
status.addFatalError(
RefactoringCoreMessages.ExtractMethodAnalyzer_cannot_extract_method_name_reference);
break superCall;
}
if (name.resolveBinding() instanceof IVariableBinding) {
StructuralPropertyDescriptor locationInParent = name.getLocationInParent();
if (locationInParent == QualifiedName.NAME_PROPERTY
|| (locationInParent == FieldAccess.NAME_PROPERTY
&& !(((FieldAccess) name.getParent()).getExpression()
instanceof ThisExpression))) {
status.addFatalError(
RefactoringCoreMessages
.ExtractMethodAnalyzer_cannot_extract_part_of_qualified_name);
break superCall;
}
}
if (name.isSimpleName() && ((SimpleName) name).isDeclaration()) {
status.addFatalError(
RefactoringCoreMessages.ExtractMethodAnalyzer_cannot_extract_name_in_declaration);
break superCall;
}
}
fForceStatic =
ASTNodes.getParent(expression, ASTNode.SUPER_CONSTRUCTOR_INVOCATION) != null
|| ASTNodes.getParent(expression, ASTNode.CONSTRUCTOR_INVOCATION) != null;
}
status.merge(LocalTypeAnalyzer.perform(fEnclosingBodyDeclaration, getSelection()));
computeLastStatementSelected();
}
super.endVisit(node);
}
private boolean isInTypeDeclarationAnnotation(ASTNode node) throws JavaModelException {
ASTNode enclosingAnnotation = ASTNodes.getParent(node, Annotation.class);
return enclosingAnnotation != null
&& enclosingAnnotation.getParent() == getContainingTypeDeclarationNode();
}
public BodyDeclaration getEnclosingBodyDeclaration() {
ASTNode node = getFirstSelectedNode();
if (node == null) return null;
return (BodyDeclaration) ASTNodes.getParent(node, BodyDeclaration.class);
}