// Next - see interface 'statemgmt.RangeScanIterator' for details
func (itr *RangeScanIterator) Next() bool {
if itr.done {
return false
}
for ; itr.dbItr.Valid(); itr.dbItr.Next() {
// making a copy of key-value bytes because, underlying key bytes are reused by itr.
// no need to free slices as iterator frees memory when closed.
trieKeyBytes := statemgmt.Copy(itr.dbItr.Key().Data())
trieNodeBytes := statemgmt.Copy(itr.dbItr.Value().Data())
value := unmarshalTrieNodeValue(trieNodeBytes)
if util.IsNil(value) {
continue
}
// found an actual key
currentCompositeKey := trieKeyEncoderImpl.decodeTrieKeyBytes(statemgmt.Copy(trieKeyBytes))
currentChaincodeID, currentKey := statemgmt.DecodeCompositeKey(currentCompositeKey)
if currentChaincodeID == itr.chaincodeID && (itr.endKey == "" || currentKey <= itr.endKey) {
itr.currentKey = currentKey
itr.currentValue = value
itr.dbItr.Next()
return true
}
// retrieved all the keys in the given range
break
}
itr.done = true
return false
}
func (bucketNode *bucketNode) mergeBucketNode(anotherBucketNode *bucketNode) {
if !bucketNode.bucketKey.equals(anotherBucketNode.bucketKey) {
panic(fmt.Errorf("Nodes with different keys can not be merged. BaseKey=[%#v], MergeKey=[%#v]", bucketNode.bucketKey, anotherBucketNode.bucketKey))
}
for i, childCryptoHash := range anotherBucketNode.childrenCryptoHash {
if !bucketNode.childrenUpdated[i] && util.IsNil(bucketNode.childrenCryptoHash[i]) {
bucketNode.childrenCryptoHash[i] = childCryptoHash
}
}
}
func fetchBucketNodeFromDB(bucketKey *bucketKey) (*bucketNode, error) {
openchainDB := db.GetDBHandle()
nodeBytes, err := openchainDB.GetFromStateCF(bucketKey.getEncodedBytes())
if err != nil {
return nil, err
}
if util.IsNil(nodeBytes) {
return nil, nil
}
return unmarshalBucketNode(bucketKey, nodeBytes), nil
}
func (c *bucketHashCalculator) computeCryptoHash() []byte {
if c.currentChaincodeID != "" {
c.appendCurrentChaincodeData()
c.currentChaincodeID = ""
c.dataNodes = nil
}
logger.Debug("Hashable content for bucket [%s]: length=%d, contentInStringForm=[%s]", c.bucketKey, len(c.hashingData), string(c.hashingData))
if util.IsNil(c.hashingData) {
return nil
}
return openchainUtil.ComputeCryptoHash(c.hashingData)
}
func unmarshalBucketNode(bucketKey *bucketKey, serializedBytes []byte) *bucketNode {
bucketNode := newBucketNode(bucketKey)
buffer := proto.NewBuffer(serializedBytes)
for i := 0; i < conf.getMaxGroupingAtEachLevel(); i++ {
childCryptoHash, err := buffer.DecodeRawBytes(false)
if err != nil {
panic(fmt.Errorf("this error should not occur: %s", err))
}
if !util.IsNil(childCryptoHash) {
bucketNode.childrenCryptoHash[i] = childCryptoHash
}
}
return bucketNode
}
func (dataNode *dataNode) isDelete() bool {
return util.IsNil(dataNode.value)
}