/** {@inheritDoc} */
public void rewriteAST(CompilationUnitRewrite cuRewrite, List textEditGroups)
throws CoreException {
TextEditGroup group =
createTextEditGroup(FixMessages.ExpressionsFix_removeUnnecessaryParenthesis_description);
textEditGroups.add(group);
ASTRewrite rewrite = cuRewrite.getASTRewrite();
while (fExpressions.size() > 0) {
ParenthesizedExpression parenthesizedExpression =
(ParenthesizedExpression) fExpressions.iterator().next();
fExpressions.remove(parenthesizedExpression);
ParenthesizedExpression down = parenthesizedExpression;
while (fExpressions.contains(down.getExpression())) {
down = (ParenthesizedExpression) down.getExpression();
fExpressions.remove(down);
}
ASTNode move = rewrite.createMoveTarget(down.getExpression());
ParenthesizedExpression top = parenthesizedExpression;
while (fExpressions.contains(top.getParent())) {
top = (ParenthesizedExpression) top.getParent();
fExpressions.remove(top);
}
rewrite.replace(top, move, group);
}
}
public void postVisit(ASTNode node) {
if (!(node instanceof ParenthesizedExpression)) {
return;
}
ParenthesizedExpression parenthesizedExpression = (ParenthesizedExpression) node;
Expression expression = parenthesizedExpression.getExpression();
while (expression instanceof ParenthesizedExpression) {
expression = ((ParenthesizedExpression) expression).getExpression();
}
// if this is part of another expression, check for this and parent precedences
if (parenthesizedExpression.getParent() instanceof Expression) {
Expression parentExpression = (Expression) parenthesizedExpression.getParent();
int expressionPrecedence = getExpressionPrecedence(expression);
int parentPrecedence = getExpressionPrecedence(parentExpression);
if ((expressionPrecedence > parentPrecedence)
&& !(parenthesizedExpression.getParent() instanceof ParenthesizedExpression)) {
return;
}
// check for case when precedences for expression and parent are same
if ((expressionPrecedence == parentPrecedence)
&& (parentExpression instanceof InfixExpression)) {
// we have expr infix (expr infix expr) removing the parenthesis is equal to (expr infix
// expr) infix expr
InfixExpression parentInfix = (InfixExpression) parentExpression;
Operator parentOperator = parentInfix.getOperator();
if (parentInfix.getLeftOperand() == parenthesizedExpression) {
fNodes.add(node);
} else if (isAssoziative(parentOperator)) {
if (parentOperator == InfixExpression.Operator.PLUS) {
if (isStringExpression(parentInfix.getLeftOperand())
|| isStringExpression(parentInfix.getRightOperand())) {
return;
}
for (Iterator J = parentInfix.extendedOperands().iterator(); J.hasNext(); ) {
Expression operand = (Expression) J.next();
if (isStringExpression(operand)) {
return;
}
}
}
fNodes.add(node);
}
return;
} else if (expressionPrecedence == parentPrecedence
&& parentExpression instanceof ConditionalExpression) {
if (((ConditionalExpression) parentExpression).getElseExpression()
!= parenthesizedExpression) return;
}
}
fNodes.add(node);
}
