void delete(Iterator<FieldSegment> iter) {
FieldSegment field = iter.next();
if (field == null) return;
int index = field.getIndexSegment().getIndex();
JsonValue kv = getJsonValueAt(index);
// if value doesn't exist in array then return null
if (kv == null) {
return;
}
// if this is the last path then return the value at this key in map
if (field.isLastPath()) {
list.remove(kv.key);
}
if (field.isMap()) {
if (kv.getType() != Type.MAP) {
return;
}
((JsonDocument) kv).delete(iter);
}
if (kv.getType() != Type.ARRAY) {
return;
}
JsonList l = (JsonList) kv;
l.delete(iter);
}
JsonValue getJsonValueAt(Iterator<FieldSegment> iter) {
FieldSegment field = iter.next();
if (field == null) return null;
int index = field.getIndexSegment().getIndex();
JsonValue kv = getJsonValueAt(index);
// if value doesn't exist in map then return null
if (kv == null) {
return null;
}
// if this is the last path then return the value at this index
if (field.isLastPath()) {
return kv;
}
if (field.isMap()) {
if (kv.getType() != Type.MAP) {
return null;
}
return ((JsonDocument) kv).getKeyValueAt(iter);
}
if (kv.getType() != Type.ARRAY) {
return null;
}
return ((JsonList) kv).getJsonValueAt(iter);
}
JsonValue createOrInsert(Iterator<FieldSegment> iter, JsonValue inJsonValue) {
/* if the field is null then get the next field from the iterator */
FieldSegment field;
field = iter.next();
int index = field.getIndexSegment().getIndex();
JsonValue oldJsonValue = getJsonValueAt(index);
/*
* If this is the last element in the path then just
* overwrite the previous value for the same key with
* new value
*/
if (field.isLastPath()) {
if (index >= list.size()) {
list.add(inJsonValue);
} else {
list.set(index, inJsonValue);
}
return this;
}
if (field.isMap()) {
/*
* if the new value for the same field is not
* a map then delete the existing value and write new
*/
JsonDocument newDocument;
if ((oldJsonValue == null) || (oldJsonValue.getType() != Type.MAP)) {
newDocument = new JsonDocument();
newDocument.createOrInsert(iter, inJsonValue);
if (index >= list.size()) {
list.add(newDocument);
} else {
list.set(index, newDocument);
}
return this;
}
newDocument = (JsonDocument) oldJsonValue;
return newDocument.createOrInsert(iter, inJsonValue);
}
/* next field is an array element - like a[3][5] */
JsonList newList;
if (oldJsonValue == null || ((oldJsonValue.getType() != Type.ARRAY))) {
newList = new JsonList();
newList.createOrInsert(iter, inJsonValue);
if (index >= list.size()) {
list.add(newList);
} else {
list.set(index, newList);
}
return this;
}
// Existing element is already an array so insert the element inside it
newList = (JsonList) oldJsonValue;
return newList.createOrInsert(iter, inJsonValue);
}
