/**
* Parses {@link #input} by extracting URL without schema and parameters and than encodes this
* URL.
*
* <p>Expected {@link #input} format is (schema):(//)URL(?|#)(parameters)
*
* @return Either encoded string or unchanged if it does not match format.
*/
String parse() {
int n = input.length();
// Scheme.
int p = scan(0, n, "/?#", ":");
if (p > 0 && at(p, n, ':')) {
p++; // Skip ':'
if (at(p, n, '/')) {
if (at(p, n, '/') == true && at(p + 1, n, '/')) {
p += 2;
// Seek authority.
int q = scan(p, n, "", "/?#");
if (q > p) {
p = q;
}
}
int q = scan(p, n, "", "?#");
StringBuilder buf = new StringBuilder(input.substring(0, p));
buf.append(encodePath(input.substring(p, q)));
buf.append(input.substring(q, n));
encoded = buf.toString();
}
}
return encoded;
}
/**
* Encodes given path by replacing all occurrences of space with '%20', percent sign with '%25'
* and semicolon with '%3B'.
*
* @param path Path to be encoded.
* @return Encoded path.
*/
private String encodePath(String path) {
StringBuilder buf = new StringBuilder(path.length());
for (int i = 0; i < path.length(); i++) {
char c = path.charAt(i);
switch (c) {
case ' ':
{
buf.append("%20");
break;
}
case '%':
{
buf.append("%25");
break;
}
case ';':
{
buf.append("%3B");
break;
}
default:
{
buf.append(c);
}
}
}
return buf.toString();
}