/**
* Removes comments from the specified string and returns the first characters of a query.
*
* @param qu query string
* @param max maximum length of string to return
* @return result
*/
public static String removeComments(final String qu, final int max) {
final StringBuilder sb = new StringBuilder();
int m = 0;
boolean s = false;
final int cl = qu.length();
for (int c = 0; c < cl && sb.length() < max; ++c) {
final char ch = qu.charAt(c);
if (ch == 0x0d) continue;
if (ch == '(' && c + 1 < cl && qu.charAt(c + 1) == ':') {
if (m == 0 && !s) {
sb.append(' ');
s = true;
}
++m;
++c;
} else if (m != 0 && ch == ':' && c + 1 < cl && qu.charAt(c + 1) == ')') {
--m;
++c;
} else if (m == 0) {
if (ch > ' ') sb.append(ch);
else if (!s) sb.append(' ');
s = ch <= ' ';
}
}
if (sb.length() >= max) sb.append("...");
return sb.toString().trim();
}
@Override
public String getHeaderField(final String field) {
final List<String> values = headers.get(field);
final StringBuilder sb = new StringBuilder();
for (final String v : values) sb.append(v).append(';');
return sb.substring(0, sb.length() - 1);
}
/**
* Returns a map with variable bindings.
*
* @param opts main options
* @return bindings
*/
public static HashMap<String, String> bindings(final MainOptions opts) {
final HashMap<String, String> bindings = new HashMap<>();
final String bind = opts.get(MainOptions.BINDINGS).trim();
final StringBuilder key = new StringBuilder();
final StringBuilder val = new StringBuilder();
boolean first = true;
final int sl = bind.length();
for (int s = 0; s < sl; s++) {
final char ch = bind.charAt(s);
if (first) {
if (ch == '=') {
first = false;
} else {
key.append(ch);
}
} else {
if (ch == ',') {
if (s + 1 == sl || bind.charAt(s + 1) != ',') {
bindings.put(key.toString().trim(), val.toString());
key.setLength(0);
val.setLength(0);
first = true;
continue;
}
// literal commas are escaped by a second comma
s++;
}
val.append(ch);
}
}
if (key.length() != 0) bindings.put(key.toString().trim(), val.toString());
return bindings;
}
@Override
public final String toString() {
final StringBuilder sb = new StringBuilder();
if (root != null) sb.append(root);
for (final Expr s : steps) {
if (sb.length() != 0) sb.append(s instanceof Bang ? " ! " : "/");
sb.append(s);
}
return sb.toString();
}