private Expression getConditionChild(TreeNode conditional) {
if (conditional instanceof InfixExpression) {
return ((InfixExpression) conditional).getOperands().get(0);
} else if (conditional instanceof ConditionalExpression) {
return ((ConditionalExpression) conditional).getExpression();
} else {
throw new AssertionError(
"Unexpected conditional node type: " + conditional.getClass().toString());
}
}
private void extractOrderedAccesses(
List<Statement> stmtList, TreeNode subExpr, List<VariableAccess> toExtract) {
for (int i = 0; i < toExtract.size(); i++) {
VariableAccess access = toExtract.get(i);
TreeNode topConditional = getTopConditional(access.expression, subExpr);
if (topConditional != null) {
// Conditional expressions require special handling when extracting the
// access because execution of the access may not be guaranteed.
// Here we collect all accesses that are decendant of the conditional
// expression and pass them to an appropriate extraction method.
int j = i + 1;
for (; j < toExtract.size(); j++) {
if (getTopConditional(toExtract.get(j).expression, subExpr) != topConditional) {
break;
}
}
if (topConditional instanceof InfixExpression) {
extractInfixConditional(
stmtList, (InfixExpression) topConditional, toExtract.subList(i, j));
} else if (topConditional instanceof ConditionalExpression) {
extractConditionalExpression(
stmtList, (ConditionalExpression) topConditional, toExtract.subList(i, j));
} else {
throw new AssertionError(
"Unexpected conditional node type: " + topConditional.getClass().toString());
}
i = j - 1;
} else {
IVariableBinding newVar =
new GeneratedVariableBinding(
"unseq$" + count++,
0,
access.expression.getTypeBinding(),
false,
false,
null,
currentMethod);
stmtList.add(new VariableDeclarationStatement(newVar, access.expression.copy()));
access.expression.replaceWith(new SimpleName(newVar));
}
}
}