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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.document.select.simple;
import com.yahoo.document.select.rule.LiteralNode;
/**
* @author baldersheim
*/
public class IntegerParser extends Parser {
private LiteralNode value;
public LiteralNode getValue() { return value; }
public boolean parse(CharSequence s) {
boolean retval = false;
int pos = eatWhite(s);
if (pos < s.length()) {
boolean isHex = ((s.length() - pos) > 2) && (s.charAt(pos) == '0') && (s.charAt(pos+1) == 'x');
Long v = null;
int startPos = pos;
if (isHex) {
for(startPos = pos+2; (pos < s.length()) && (((s.charAt(pos) >= '0') && (s.charAt(pos) <= '9')) ||
((s.charAt(pos) >= 'a') && (s.charAt(pos) <= 'f')) ||
((s.charAt(pos) >= 'A') && (s.charAt(pos) <= 'F'))); pos++);
if (pos > startPos) {
v = Long.valueOf(s.subSequence(startPos, pos).toString(), 16);
retval = true;
}
} else {
if ((s.charAt(pos) == '-') || (s.charAt(pos) == '+')) {
pos++;
}
for(;(pos < s.length()) && (s.charAt(pos) >= '0') && (s.charAt(pos) <= '9') ; pos++);
if (pos > startPos) {
v = Long.valueOf(s.subSequence(startPos, pos).toString(), 10);
retval = true;
}
}
value = new LiteralNode(v);
}
setRemaining(s.subSequence(pos, s.length()));
return retval;
}
}
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