public static void rewriteModifiers(
final FieldDeclaration declarationNode,
final VariableDeclarationFragment[] toChange,
final int includedModifiers,
final int excludedModifiers,
final ASTRewrite rewrite,
final TextEditGroup group) {
final List<VariableDeclarationFragment> fragmentsToChange = Arrays.asList(toChange);
AST ast = declarationNode.getAST();
/*
* Problem: Same declarationNode can be the subject of multiple calls to this method.
* For the 2nd++ calls, the original declarationNode has already been rewritten, and this has to be taken into account.
*
* Assumption:
* - Modifiers for each VariableDeclarationFragment are modified at most once.
*
* Solution:
* - Maintain a map from original VariableDeclarationFragments to their new FieldDeclaration.
* - Original modifiers in declarationNode belong to the first fragment.
* - When a later fragment needs different modifiers, we create a new FieldDeclaration and move all successive fragments into that
* declaration
* - When a fragment has been moved to a new declaration, make sure we don't create a new move target again,
* but instead use the already created one
*/
List<VariableDeclarationFragment> fragments = declarationNode.fragments();
Iterator<VariableDeclarationFragment> iter = fragments.iterator();
ListRewrite blockRewrite;
if (declarationNode.getParent() instanceof AbstractTypeDeclaration) {
blockRewrite =
rewrite.getListRewrite(
declarationNode.getParent(),
((AbstractTypeDeclaration) declarationNode.getParent())
.getBodyDeclarationsProperty());
} else {
blockRewrite =
rewrite.getListRewrite(
declarationNode.getParent(), AnonymousClassDeclaration.BODY_DECLARATIONS_PROPERTY);
}
VariableDeclarationFragment lastFragment = iter.next();
ASTNode lastStatement = declarationNode;
if (fragmentsToChange.contains(lastFragment)) {
ModifierRewrite modifierRewrite = ModifierRewrite.create(rewrite, declarationNode);
modifierRewrite.setModifiers(includedModifiers, excludedModifiers, group);
}
ListRewrite fragmentsRewrite = null;
while (iter.hasNext()) {
VariableDeclarationFragment currentFragment = iter.next();
Map<VariableDeclarationFragment, MovedFragment> lookup =
(Map<VariableDeclarationFragment, MovedFragment>)
rewrite.getProperty(MovedFragment.class.getName());
if (lookup == null) {
lookup = new HashMap<VariableDeclarationFragment, MovedFragment>();
rewrite.setProperty(MovedFragment.class.getName(), lookup);
}
MovedFragment currentMovedFragment = lookup.get(currentFragment);
boolean changeLast = fragmentsToChange.contains(lastFragment);
boolean changeCurrent = fragmentsToChange.contains(currentFragment);
if (changeLast != changeCurrent || lookup.containsKey(lastFragment)) {
ModifierRewrite modifierRewrite = null;
if (currentMovedFragment != null) {
// Current fragment has already been moved.
if (currentMovedFragment.fUsesOriginalModifiers) {
// Need to put in the right modifiers (removing any existing ones).
modifierRewrite = ModifierRewrite.create(rewrite, currentMovedFragment.fDeclaration);
ListRewrite listRewrite =
rewrite.getListRewrite(
currentMovedFragment.fDeclaration, FieldDeclaration.MODIFIERS2_PROPERTY);
List<ASTNode> extendedList = listRewrite.getRewrittenList();
for (int i = 0; i < extendedList.size(); i++) {
ASTNode curr = extendedList.get(i);
if (curr instanceof Modifier) rewrite.remove(curr, group);
}
}
// otherwise, don't need to touch the modifiers, so leave modifierRewrite null
} else { // need to split an existing field declaration
VariableDeclarationFragment moveTarget;
moveTarget = (VariableDeclarationFragment) rewrite.createMoveTarget(currentFragment);
FieldDeclaration newStatement =
(FieldDeclaration) ast.createInstance(FieldDeclaration.FIELD_DECLARATION);
rewrite
.getListRewrite(newStatement, FieldDeclaration.FRAGMENTS_PROPERTY)
.insertLast(moveTarget, group);
lookup.put(currentFragment, new MovedFragment(moveTarget, newStatement, !changeCurrent));
rewrite.set(
newStatement,
FieldDeclaration.TYPE_PROPERTY,
rewrite.createCopyTarget(declarationNode.getType()),
group);
modifierRewrite = ModifierRewrite.create(rewrite, newStatement);
modifierRewrite.copyAllAnnotations(declarationNode, group);
blockRewrite.insertAfter(newStatement, lastStatement, group);
fragmentsRewrite =
rewrite.getListRewrite(newStatement, FieldDeclaration.FRAGMENTS_PROPERTY);
lastStatement = newStatement;
}
if (modifierRewrite != null) {
if (changeCurrent) {
int newModifiers =
(declarationNode.getModifiers() & ~excludedModifiers) | includedModifiers;
modifierRewrite.setModifiers(newModifiers, excludedModifiers, group);
} else {
int newModifiers = declarationNode.getModifiers();
modifierRewrite.setModifiers(newModifiers, Modifier.NONE, group);
}
}
} else if (fragmentsRewrite != null) {
VariableDeclarationFragment fragment0;
boolean usesOriginalModifiers = true;
if (currentMovedFragment != null) {
fragment0 = currentMovedFragment.fMoveTarget;
usesOriginalModifiers = currentMovedFragment.fUsesOriginalModifiers;
rewrite
.getListRewrite(
currentMovedFragment.fDeclaration, FieldDeclaration.FRAGMENTS_PROPERTY)
.remove(fragment0, group);
} else {
fragment0 = (VariableDeclarationFragment) rewrite.createMoveTarget(currentFragment);
}
lookup.put(
currentFragment, new MovedFragment(fragment0, lastStatement, usesOriginalModifiers));
fragmentsRewrite.insertLast(fragment0, group);
}
lastFragment = currentFragment;
}
}