public static void decodeQueryString(String s, int fromIndex, Map<String, String> params) {
if (fromIndex < 0) {
return;
}
if (fromIndex >= s.length()) {
return;
}
int queryStringLength = s.contains("#") ? s.indexOf("#") : s.length();
String name = null;
int pos = fromIndex; // Beginning of the unprocessed region
int i; // End of the unprocessed region
char c = 0; // Current character
for (i = fromIndex; i < queryStringLength; i++) {
c = s.charAt(i);
if (c == '=' && name == null) {
if (pos != i) {
name = decodeComponent(s.substring(pos, i));
}
pos = i + 1;
} else if (c == '&' || c == ';') {
if (name == null && pos != i) {
// We haven't seen an `=' so far but moved forward.
// Must be a param of the form '&a&' so add it with
// an empty value.
addParam(params, decodeComponent(s.substring(pos, i)), "");
} else if (name != null) {
addParam(params, name, decodeComponent(s.substring(pos, i)));
name = null;
}
pos = i + 1;
}
}
if (pos != i) { // Are there characters we haven't dealt with?
if (name == null) { // Yes and we haven't seen any `='.
addParam(params, decodeComponent(s.substring(pos, i)), "");
} else { // Yes and this must be the last value.
addParam(params, name, decodeComponent(s.substring(pos, i)));
}
} else if (name != null) { // Have we seen a name without value?
addParam(params, name, "");
}
}
