@Override
public boolean visit(WhileStatement node) {
final Object constantCondition = node.getExpression().resolveConstantExpressionValue();
if (Boolean.FALSE.equals(constantCondition)) {
this.ctx.getRefactorings().remove(node);
return DO_NOT_VISIT_SUBTREE;
}
return VISIT_SUBTREE;
}
@Override
public boolean visit(IfStatement node) {
final ASTBuilder b = this.ctx.getASTBuilder();
final Refactorings r = this.ctx.getRefactorings();
final Statement thenStmt = node.getThenStatement();
final Statement elseStmt = node.getElseStatement();
final Expression condition = node.getExpression();
if (elseStmt != null && asList(elseStmt).isEmpty()) {
r.remove(elseStmt);
return DO_NOT_VISIT_SUBTREE;
} else if (thenStmt != null && asList(thenStmt).isEmpty()) {
if (elseStmt != null) {
r.replace(node, b.if0(b.negate(condition), b.move(elseStmt)));
} else {
final List<Expression> sideEffectExprs = new ArrayList<Expression>();
collectSideEffects(condition, sideEffectExprs);
if (!sideEffectExprs.isEmpty()) {
for (Expression sideEffectExpr : sideEffectExprs) {
r.insertBefore(b.toStmt(b.move(sideEffectExpr)), node);
}
}
r.remove(node);
}
return DO_NOT_VISIT_SUBTREE;
}
final Object constantCondition = condition.resolveConstantExpressionValue();
if (Boolean.TRUE.equals(constantCondition)) {
r.replace(node, b.copy(thenStmt));
if (lastStmtIsThrowOrReturn(thenStmt)) {
r.remove(getNextSiblings(node));
}
return DO_NOT_VISIT_SUBTREE;
} else if (Boolean.FALSE.equals(constantCondition)) {
if (elseStmt != null) {
r.replace(node, b.copy(elseStmt));
if (lastStmtIsThrowOrReturn(elseStmt)) {
r.remove(getNextSiblings(node));
}
} else {
r.remove(node);
}
return DO_NOT_VISIT_SUBTREE;
}
return VISIT_SUBTREE;
}