1 /* Copyright 2015 The TensorFlow Authors. All Rights Reserved. 2 3 Licensed under the Apache License, Version 2.0 (the "License"); 4 you may not use this file except in compliance with the License. 5 You may obtain a copy of the License at 6 7 http://www.apache.org/licenses/LICENSE-2.0 8 9 Unless required by applicable law or agreed to in writing, software 10 distributed under the License is distributed on an "AS IS" BASIS, 11 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 See the License for the specific language governing permissions and 13 limitations under the License. 14 ==============================================================================*/ 15 16 #ifndef TENSORFLOW_LIB_IO_TWO_LEVEL_ITERATOR_H_ 17 #define TENSORFLOW_LIB_IO_TWO_LEVEL_ITERATOR_H_ 18 19 #include "tensorflow/core/lib/io/iterator.h" 20 21 namespace tensorflow { 22 namespace table { 23 24 // Return a new two level iterator. A two-level iterator contains an 25 // index iterator whose values point to a sequence of blocks where 26 // each block is itself a sequence of key,value pairs. The returned 27 // two-level iterator yields the concatenation of all key/value pairs 28 // in the sequence of blocks. Takes ownership of "index_iter" and 29 // will delete it when no longer needed. 30 // 31 // Uses a supplied function to convert an index_iter value into 32 // an iterator over the contents of the corresponding block. 33 extern Iterator* NewTwoLevelIterator( 34 Iterator* index_iter, 35 Iterator* (*block_function)(void* arg, const StringPiece& index_value), 36 void* arg); 37 38 } // namespace table 39 } // namespace tensorflow 40 41 #endif // TENSORFLOW_LIB_IO_TWO_LEVEL_ITERATOR_H_ 42
