/**
* Appends to current pattern new part which is could be a thread coupling pattern or just a
* different thing to look up in the data.
*
* @param val pattern to be added
* @param qualifier identifies how to conjunct it with previous patterns
*/
protected void addExtendedFilterPattern(String val, String qualifier) {
if (LOGGER.isTraceEnabled())
LOGGER.trace("adding complex pattern: val={} qual={}", val, qualifier);
if (qualifier != null)
patternBuilder = patternBuilder.append(Qualifier.valueOf(qualifier).getPattern());
patternBuilder = patternBuilder.append("(?:").append(val).append(")");
if (LOGGER.isTraceEnabled()) {
LOGGER.trace("Built so far: {}", patternBuilder.toString());
}
}
/**
* Parses supplied filterPattern. If it contains any qualifiers like %and&|%or% parses them into
* valid regex representation.
*
* @param val pattern String
*/
protected void extractPatternParts(String val) {
String qRegex = "";
for (Qualifier it : Qualifier.values()) {
qRegex += qRegex.length() > 0 ? "|%" + it + "%" : "%" + it + "%";
}
if (LOGGER.isTraceEnabled())
LOGGER.trace("Trying to match supplied pattern /{}/ if it contains /{}/", val, qRegex);
Matcher qualifierMatcher =
Pattern.compile(qRegex).matcher(val); // matching any qualifiers with % signs
if (qualifierMatcher.find()) {
if (LOGGER.isTraceEnabled()) LOGGER.trace("Processing extended pattern");
String[] tokens = val.split("%");
String nextQualifier = null;
if (tokens != null) {
qRegex = qRegex.replaceAll("%", ""); // matching only qualifier names
for (String grp : tokens) {
if (LOGGER.isTraceEnabled()) LOGGER.trace("Next group in match: {}", grp);
qualifierMatcher = Pattern.compile(qRegex).matcher(grp);
if (qualifierMatcher.matches()) {
nextQualifier = qualifierMatcher.group();
continue;
}
addExtendedFilterPattern(grp, nextQualifier);
nextQualifier = null;
}
} else throw new IllegalArgumentException("Check your extended pattern:/" + val + "/");
} else {
if (LOGGER.isTraceEnabled())
LOGGER.trace("No extended pattern supplied; keeping things simple");
patternBuilder.append(val);
}
}