private void visitBackwards(List<? extends ASTNode> list) {
if (fBreak) return;
for (int i = list.size() - 1; i >= 0; i--) {
ASTNode curr = list.get(i);
if (curr.getStartPosition() < fPosition) {
curr.accept(this);
}
}
}
private void removeStatement(ASTRewrite rewrite, ASTNode statementNode, TextEditGroup group) {
if (ASTNodes.isControlStatementBody(statementNode.getLocationInParent())) {
rewrite.replace(statementNode, rewrite.getAST().newBlock(), group);
} else {
rewrite.remove(statementNode, group);
}
}
private static ITypeBinding getQualifier(SimpleName selector) {
ASTNode parent = selector.getParent();
switch (parent.getNodeType()) {
case ASTNode.METHOD_INVOCATION:
MethodInvocation decl = (MethodInvocation) parent;
if (selector == decl.getName()) {
return getBinding(decl.getExpression());
}
return null;
case ASTNode.QUALIFIED_NAME:
QualifiedName qualifiedName = (QualifiedName) parent;
if (selector == qualifiedName.getName()) {
return getBinding(qualifiedName.getQualifier());
}
return null;
case ASTNode.FIELD_ACCESS:
FieldAccess fieldAccess = (FieldAccess) parent;
if (selector == fieldAccess.getName()) {
return getBinding(fieldAccess.getExpression());
}
return null;
case ASTNode.SUPER_FIELD_ACCESS:
{
ITypeBinding curr = Bindings.getBindingOfParentType(parent);
return curr.getSuperclass();
}
case ASTNode.SUPER_METHOD_INVOCATION:
{
SuperMethodInvocation superInv = (SuperMethodInvocation) parent;
if (selector == superInv.getName()) {
ITypeBinding curr = Bindings.getBindingOfParentType(parent);
return curr.getSuperclass();
}
return null;
}
default:
if (parent instanceof Type) {
// bug 67644: in 'a.new X()', all member types of A are visible as location of X.
ASTNode normalizedNode = ASTNodes.getNormalizedNode(parent);
if (normalizedNode.getLocationInParent() == ClassInstanceCreation.TYPE_PROPERTY) {
ClassInstanceCreation creation = (ClassInstanceCreation) normalizedNode.getParent();
return getBinding(creation.getExpression());
}
}
return null;
}
}
private boolean addOuterDeclarationsForLocalType(
ITypeBinding localBinding, int flags, IBindingRequestor requestor) {
ASTNode node = fRoot.findDeclaringNode(localBinding);
if (node == null) {
return false;
}
if (node instanceof AbstractTypeDeclaration || node instanceof AnonymousClassDeclaration) {
if (addLocalDeclarations(node.getParent(), flags, requestor)) return true;
ITypeBinding parentTypeBinding = Bindings.getBindingOfParentType(node.getParent());
if (parentTypeBinding != null) {
if (addTypeDeclarations(parentTypeBinding, flags, requestor)) return true;
}
}
return false;
}
public static Statement findParentStatement(ASTNode node) {
while ((node != null) && (!(node instanceof Statement))) {
node = node.getParent();
if (node instanceof BodyDeclaration) {
return null;
}
}
return (Statement) node;
}
public IBinding[] getDeclarationsAfter(int offset, int flags) {
try {
org.eclipse.che.ide.ext.java.jdt.core.dom.NodeFinder finder =
new org.eclipse.che.ide.ext.java.jdt.core.dom.NodeFinder(fRoot, offset, 0);
ASTNode node = finder.getCoveringNode();
if (node == null) {
return null;
}
ASTNode declaration = findParentStatement(node);
while (declaration instanceof Statement && declaration.getNodeType() != ASTNode.BLOCK) {
declaration = declaration.getParent();
}
if (declaration instanceof Block) {
DefaultBindingRequestor requestor = new DefaultBindingRequestor();
DeclarationsAfterVisitor visitor =
new DeclarationsAfterVisitor(node.getStartPosition(), flags, requestor);
declaration.accept(visitor);
List<IBinding> result = requestor.getResult();
return result.toArray(new IBinding[result.size()]);
}
return NO_BINDING;
} finally {
clearLists();
}
}
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;
}
private void removeUnusedName(CompilationUnitRewrite cuRewrite, SimpleName simpleName) {
ASTRewrite rewrite = cuRewrite.getASTRewrite();
CompilationUnit completeRoot = cuRewrite.getRoot();
IBinding binding = simpleName.resolveBinding();
CompilationUnit root = (CompilationUnit) simpleName.getRoot();
String displayString = getDisplayString(binding);
TextEditGroup group = createTextEditGroup(displayString, cuRewrite);
if (binding.getKind() == IBinding.METHOD) {
IMethodBinding decl = ((IMethodBinding) binding).getMethodDeclaration();
ASTNode declaration = root.findDeclaringNode(decl);
rewrite.remove(declaration, group);
} else if (binding.getKind() == IBinding.TYPE) {
ITypeBinding decl = ((ITypeBinding) binding).getTypeDeclaration();
ASTNode declaration = root.findDeclaringNode(decl);
if (declaration.getParent() instanceof TypeDeclarationStatement) {
declaration = declaration.getParent();
}
rewrite.remove(declaration, group);
} else if (binding.getKind() == IBinding.VARIABLE) {
SimpleName nameNode =
(SimpleName)
NodeFinder.perform(
completeRoot, simpleName.getStartPosition(), simpleName.getLength());
SimpleName[] references =
LinkedNodeFinder.findByBinding(completeRoot, nameNode.resolveBinding());
for (int i = 0; i < references.length; i++) {
removeVariableReferences(rewrite, references[i], group);
}
IVariableBinding bindingDecl =
((IVariableBinding) nameNode.resolveBinding()).getVariableDeclaration();
ASTNode declaringNode = completeRoot.findDeclaringNode(bindingDecl);
if (declaringNode instanceof SingleVariableDeclaration) {
removeParamTag(rewrite, (SingleVariableDeclaration) declaringNode, group);
}
} else {
// unexpected
}
}
private void removeVariableWithInitializer(
ASTRewrite rewrite, ASTNode initializerNode, ASTNode statementNode, TextEditGroup group) {
boolean performRemove = fForceRemove;
if (!performRemove) {
ArrayList<Expression> sideEffectNodes = new ArrayList<Expression>();
initializerNode.accept(new SideEffectFinder(sideEffectNodes));
performRemove = sideEffectNodes.isEmpty();
}
if (performRemove) {
removeStatement(rewrite, statementNode, group);
fRemovedAssignmentsCount++;
} else {
ASTNode initNode = rewrite.createMoveTarget(initializerNode);
ExpressionStatement statement =
rewrite.getAST().newExpressionStatement((Expression) initNode);
rewrite.replace(statementNode, statement, null);
fAlteredAssignmentsCount++;
}
}
public static BodyDeclaration findParentBodyDeclaration(ASTNode node) {
while ((node != null) && (!(node instanceof BodyDeclaration))) {
node = node.getParent();
}
return (BodyDeclaration) node;
}
private boolean addLocalDeclarations(ASTNode node, int flags, IBindingRequestor requestor) {
return addLocalDeclarations(node, node.getStartPosition(), flags, requestor);
}
private boolean isInside(ASTNode node) {
int start = node.getStartPosition();
int end = start + node.getLength();
return start <= fPosition && fPosition < end;
}
/**
* 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();
if (initializer instanceof CastExpression) {
initializer = ((CastExpression) initializer).getExpression();
}
boolean sideEffectInitializer =
initializer instanceof MethodInvocation || initializer instanceof ClassInstanceCreation;
if (fragments.size() == fUnusedNames.length) {
if (fForceRemove) {
rewrite.remove(varDecl, group);
return;
}
if (parent.getParent() instanceof FieldDeclaration) {
rewrite.remove(varDecl, group);
return;
}
if (sideEffectInitializer) {
Expression movedInit = (Expression) rewrite.createMoveTarget(initializer);
ExpressionStatement wrapped = rewrite.getAST().newExpressionStatement(movedInit);
rewrite.replace(varDecl, 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) {
ASTNode lst = declaration.getParent();
ListRewrite listRewrite = null;
if (lst instanceof Block) {
listRewrite = rewrite.getListRewrite(lst, Block.STATEMENTS_PROPERTY);
} else if (lst instanceof SwitchStatement) {
listRewrite = rewrite.getListRewrite(lst, SwitchStatement.STATEMENTS_PROPERTY);
} else {
Assert.isTrue(false);
}
splitUpDeclarations(
rewrite, group, frag, listRewrite, (VariableDeclarationStatement) declaration);
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);
}
}
}