@Override
public Set<SearchFilter> visitLessThanFilter(
Set<SearchFilter> filters, JsonPointer field, Object valueAssertion) {
filters.add(
comparison(field.leaf(), SearchFilter.Operator.LESS_THAN_OPERATOR, valueAssertion));
return filters;
}
@Override
public Set<SearchFilter> visitGreaterThanOrEqualToFilter(
Set<SearchFilter> filters, JsonPointer field, Object valueAssertion) {
filters.add(
comparison(
field.leaf(), SearchFilter.Operator.GREATER_THAN_OR_EQUAL_OPERATOR, valueAssertion));
return filters;
}
/**
* Returns a JSON object containing only the specified fields from the provided JSON value. If the
* list of fields is empty then the value is returned unchanged.
*
* <p><b>NOTE:</b> this method only performs a shallow copy of extracted fields, so changes to the
* filtered JSON value may impact the original JSON value, and vice-versa.
*
* @param resource The JSON value whose fields are to be filtered.
* @param fields The list of fields to be extracted.
* @return The filtered JSON value.
*/
public static JsonValue filterResource(
final JsonValue resource, final Collection<JsonPointer> fields) {
if (fields.isEmpty() || resource.isNull() || resource.size() == 0) {
return resource;
} else {
final Map<String, Object> filtered = new LinkedHashMap<String, Object>(fields.size());
for (JsonPointer field : fields) {
if (field.isEmpty()) {
// Special case - copy resource fields (assumes Map).
filtered.putAll(resource.asMap());
} else {
// FIXME: what should we do if the field refers to an array element?
final JsonValue value = resource.get(field);
if (value != null) {
final String key = field.leaf();
filtered.put(key, value.getObject());
}
}
}
return new JsonValue(filtered);
}
}
@Override
public Set<SearchFilter> visitEqualsFilter(
Set<SearchFilter> filters, JsonPointer field, Object valueAssertion) {
filters.add(comparison(field.leaf(), SearchFilter.Operator.EQUALS_OPERATOR, valueAssertion));
return filters;
}