private boolean match0(Map properties) {
switch (op) {
case AND:
{
FilterImpl[] filters = (FilterImpl[]) value;
for (int i = 0, size = filters.length; i < size; i++) {
if (!filters[i].match0(properties)) {
return false;
}
}
return true;
}
case OR:
{
FilterImpl[] filters = (FilterImpl[]) value;
for (int i = 0, size = filters.length; i < size; i++) {
if (filters[i].match0(properties)) {
return true;
}
}
return false;
}
case NOT:
{
FilterImpl filter = (FilterImpl) value;
return !filter.match0(properties);
}
case SUBSTRING:
case EQUAL:
case GREATER:
case LESS:
case APPROX:
case SUBSET:
case SUPERSET:
{
Object prop = (properties == null) ? null : properties.get(attr);
return compare(op, prop, value);
}
case PRESENT:
{
Object prop = (properties == null) ? null : properties.get(attr);
return prop != null;
}
}
return false;
}
/**
* Returns this <code>Filter</code>'s normalized filter string.
*
* <p>The filter string is normalized by removing whitespace which does not affect the meaning of
* the filter.
*
* @return This <code>Filter</code>'s filter string.
*/
private String normalize() {
StringBuffer sb = new StringBuffer();
sb.append('(');
switch (op) {
case AND:
{
sb.append('&');
FilterImpl[] filters = (FilterImpl[]) value;
for (int i = 0, size = filters.length; i < size; i++) {
sb.append(filters[i].normalize());
}
break;
}
case OR:
{
sb.append('|');
FilterImpl[] filters = (FilterImpl[]) value;
for (int i = 0, size = filters.length; i < size; i++) {
sb.append(filters[i].normalize());
}
break;
}
case NOT:
{
sb.append('!');
FilterImpl filter = (FilterImpl) value;
sb.append(filter.normalize());
break;
}
case SUBSTRING:
{
sb.append(attr);
sb.append('=');
String[] substrings = (String[]) value;
for (int i = 0, size = substrings.length; i < size; i++) {
String substr = substrings[i];
if (substr == null) /* * */ {
sb.append('*');
} else /* xxx */ {
sb.append(encodeValue(substr));
}
}
break;
}
case EQUAL:
{
sb.append(attr);
sb.append('=');
sb.append(encodeValue((String) value));
break;
}
case GREATER:
{
sb.append(attr);
sb.append(">=");
sb.append(encodeValue((String) value));
break;
}
case LESS:
{
sb.append(attr);
sb.append("<=");
sb.append(encodeValue((String) value));
break;
}
case APPROX:
{
sb.append(attr);
sb.append("~=");
sb.append(encodeValue(approxString((String) value)));
break;
}
case PRESENT:
{
sb.append(attr);
sb.append("=*");
break;
}
case SUBSET:
{
sb.append(attr);
sb.append("<*");
sb.append(encodeValue(approxString((String) value)));
break;
}
case SUPERSET:
{
sb.append(attr);
sb.append("*>");
sb.append(encodeValue(approxString((String) value)));
break;
}
}
sb.append(')');
return sb.toString();
}
/**
* Construct a Filter object. This filter object may be used to match a ServiceReference or a
* Dictionary. See Filter for a description of the filter string syntax.
*
* @param filter The filter string.
* @return A Filter object encapsulating the filter string.
* @exception InvalidSyntaxException If the filter parameter contains an invalid filter string
* which cannot be parsed.
*/
public Filter createFilter(String filter) throws InvalidSyntaxException {
checkValid();
return FilterImpl.newInstance(filter);
}