public <A, Q extends SimpleExpression<A>> Collection<Predicate> list(
ListPath<A, Q> expr, ListExpression<A, Q> other, A knownElement) {
List<Predicate> rv = new ArrayList<Predicate>();
rv.addAll(collection(expr, other, knownElement));
rv.add(expr.get(0).eq(knownElement));
return ImmutableList.copyOf(rv);
}
/**
* Creates a Predicate from list of BooleanExpression predicates which represents all search
* filters.
*
* @param config PaginationConfiguration data holding object
* @return query to filter entities according pagination configuration data.
*/
@SuppressWarnings({"rawtypes", "unchecked"})
protected Predicate getPredicate(PaginationConfiguration config) {
PathBuilder<T> entityPath = new PathBuilder(entityClass, getAliasName(entityClass));
BooleanExpression predicate = null;
Map<String, Object> filters = config.getFilters();
if (filters != null) {
// first we process nonstandard filters
List<String> filtersToRemove = processNonStandardFilters(filters, entityPath);
filters = removeUsedFilters(filtersToRemove, filters);
if (!filters.isEmpty()) {
for (Map.Entry<String, Object> entry : filters.entrySet()) {
String key = entry.getKey();
Object filter = entry.getValue();
if (filter != null) {
// if ranged search (from - to fields)
if (key.contains("fromRange-")) {
// CHECKSTYLE:OFF
String parsedKey = key.substring(10);
// CHECKSTYLE:ON
if (filter instanceof Number) {
NumberPath path = createNumberPath(entityPath, parsedKey, filter);
predicate = and(predicate, path.goe((Number) filter));
} else if (filter instanceof Date) {
DatePath path = entityPath.getDate(parsedKey, Date.class);
predicate = and(predicate, path.goe((Date) filter));
}
} else if (key.contains("toRange-")) {
// CHECKSTYLE:OFF
String parsedKey = key.substring(8);
// CHECKSTYLE:ON
if (filter instanceof Number) {
NumberPath path = createNumberPath(entityPath, parsedKey, filter);
predicate = and(predicate, path.loe((Number) filter));
} else if (filter instanceof Date) {
DatePath path = entityPath.getDate(parsedKey, Date.class);
predicate = and(predicate, path.loe((Date) filter));
}
} else if (key.contains("list-")) {
// CHECKSTYLE:OFF
// if searching elements from list
String parsedKey = key.substring(5);
// CHECKSTYLE:ON
ListPath path = entityPath.getList(parsedKey, filter.getClass());
predicate = and(predicate, path.contains(filter));
} else { // if not ranged search
if (filter instanceof String) {
StringPath path = entityPath.getString(key);
String filterString = (String) filter;
predicate = and(predicate, path.startsWithIgnoreCase(filterString));
} else if (filter instanceof Date) {
DatePath path = entityPath.getDate(key, Date.class);
predicate = and(predicate, path.eq(filter));
} else if (filter instanceof Number) {
NumberPath path = createNumberPath(entityPath, key, filter);
predicate = and(predicate, path.eq(filter));
} else if (filter instanceof Boolean) {
BooleanPath path = entityPath.getBoolean(key);
predicate = and(predicate, path.eq((Boolean) filter));
} else if (filter instanceof Enum) {
EnumPath path = entityPath.getEnum(key, Enum.class);
predicate = and(predicate, path.eq(filter));
} else if (BaseEntity.class.isAssignableFrom(filter.getClass())) {
PathBuilder path = entityPath.get(key);
predicate = and(predicate, path.eq(filter));
}
}
}
}
}
}
return predicate;
}