public ArrayAddExpressionEvaluator(
JsonNodeFactory factory, FieldTreeNode context, ArrayAddExpression expr) {
this.factory = factory;
if (expr.getOp() == UpdateOperator._insert) {
// Path should include an index
if (expr.getField().isIndex(expr.getField().numSegments() - 1)) {
arrayField = expr.getField().prefix(-1);
insertionIndex = expr.getField().getIndex(expr.getField().numSegments() - 1);
} else {
throw new EvaluationError(CrudConstants.ERR_REQUIRED_INSERTION_INDEX + expr.getField());
}
} else {
arrayField = expr.getField();
insertionIndex = -1;
}
if (arrayField.nAnys() > 0) {
throw new EvaluationError(CrudConstants.ERR_PATTERN_NOT_EXPECTED + arrayField);
}
FieldTreeNode ftn = context.resolve(arrayField);
if (ftn instanceof ArrayField) {
fieldMd = (ArrayField) ftn;
// Array size field should be at the same level as the array field
MutablePath abs = new MutablePath();
fieldMd.getFullPath(abs);
absArrayField = abs.mutableCopy();
abs.setLast(abs.getLast() + "#");
// At this point, arraySizeField is derived from metadata,
// so it has * as array indexes
arraySizeField = abs.immutableCopy();
values = new ArrayList<>(expr.getValues().size());
initializeArrayField(context, expr);
} else {
throw new EvaluationError(CrudConstants.ERR_REQUIRED_ARRAY + arrayField);
}
}
private void initializeArrayField(FieldTreeNode context, ArrayAddExpression expr) {
for (RValueExpression rvalue : expr.getValues()) {
Path refPath = null;
FieldTreeNode refMd = null;
if (rvalue.getType() == RValueExpression.RValueType._dereference) {
refPath = rvalue.getPath();
refMd = context.resolve(refPath);
if (refMd == null) {
throw new EvaluationError(CrudConstants.ERR_INVALID_DEREFERENCE + refPath);
}
}
ArrayElement element = fieldMd.getElement();
validateArrayElement(element, refMd, rvalue, refPath);
values.add(
new RValueData(
refPath,
refMd == null ? null : refMd.getType(),
rvalue.getValue(),
rvalue.getType()));
}
}