/** Modifies the instance */
void addOrder(String condition) {
condition = condition.trim();
SortDirection dir = SortDirection.ASCENDING;
if (condition.startsWith("-")) {
dir = SortDirection.DESCENDING;
condition = condition.substring(1).trim();
}
boolean isNonKeyOrder = true;
// Check for @Id or @Parent fields. Any setting adjusts the key order. We only enforce that
// they are both set the same direction.
if (this.classRestriction != null) {
KeyMetadata<?> meta = Keys.getMetadataSafe(this.classRestriction);
if (condition.equals(meta.getParentFieldName()))
throw new IllegalStateException(
"You cannot order by @Parent field. Perhaps you wish to order by __key__ instead?");
if (condition.equals(meta.getIdFieldName())) {
if (meta.hasParentField())
throw new IllegalStateException(
"You cannot order by @Id field if class has a @Parent field. Perhaps you wish to order by __key__ instead?");
condition = "__key__";
isNonKeyOrder = false;
}
}
this.actual.addSort(condition, dir);
if (isNonKeyOrder) this.hasNonKeyOrder = true;
}
/** Modifies the instance */
void addFilter(String condition, Object value) {
String[] parts = condition.trim().split(" ");
if (parts.length < 1 || parts.length > 2)
throw new IllegalArgumentException("'" + condition + "' is not a legal filter condition");
String prop = parts[0].trim();
FilterOperator op = (parts.length == 2) ? this.translate(parts[1]) : FilterOperator.EQUAL;
// If we have a class restriction, check to see if the property is the @Parent or @Id
if (this.classRestriction != null) {
KeyMetadata<?> meta = Keys.getMetadataSafe(this.classRestriction);
if (prop.equals(meta.getParentFieldName())) {
throw new IllegalArgumentException(
"@Parent fields cannot be filtered on. Perhaps you wish to use filterKey() or ancestor() instead?");
} else if (prop.equals(meta.getIdFieldName())) {
if (meta.hasParentField())
throw new IllegalArgumentException(
"@Id fields cannot be filtered on classes that have @Parent fields. Perhaps you wish to use filterKey() instead?");
String kind = Key.getKind(this.classRestriction);
if (value instanceof Number) {
value =
DatastoreUtils.createKey(
null, kind, ((Number) value).longValue()); // accept non-long values
} else if (value instanceof String) {
value = DatastoreUtils.createKey(null, kind, value);
} else {
throw new IllegalArgumentException("Id filter values must be Long or String");
}
prop = "__key__";
}
}
// Convert to something filterable, possibly extracting/converting keys
value = loader.getObjectifyImpl().makeFilterable(value);
this.actual.addFilter(prop, op, value);
if (op == FilterOperator.IN || op == FilterOperator.NOT_EQUAL) hasMulti = true;
}
