diff options
Diffstat (limited to 'BJC-Utils2/src/main/java/bjc/utils/ioutils/blocks/FlatMappedBlockReader.java')
| -rw-r--r-- | BJC-Utils2/src/main/java/bjc/utils/ioutils/blocks/FlatMappedBlockReader.java | 86 |
1 files changed, 0 insertions, 86 deletions
diff --git a/BJC-Utils2/src/main/java/bjc/utils/ioutils/blocks/FlatMappedBlockReader.java b/BJC-Utils2/src/main/java/bjc/utils/ioutils/blocks/FlatMappedBlockReader.java deleted file mode 100644 index f4d8439..0000000 --- a/BJC-Utils2/src/main/java/bjc/utils/ioutils/blocks/FlatMappedBlockReader.java +++ /dev/null @@ -1,86 +0,0 @@ -package bjc.utils.ioutils.blocks; - -import java.io.IOException; - -import java.util.Iterator; -import java.util.List; -import java.util.function.Function; -import java.util.function.UnaryOperator; - -/** - * A block reader that supports applying a flatmap operation to blocks. - * - * The use-case in mind for this was tokenizing blocks. - * - * @author Benjamin Culkin - */ -public class FlatMappedBlockReader implements BlockReader { - /* - * The source reader. - */ - private BlockReader reader; - - /* - * The current block, and any blocks pending from the last source block. - */ - private Iterator<Block> pending; - private Block current; - - /* - * The operator to open blocks with. - */ - private Function<Block, List<Block>> transform; - - /* - * The current block number. - */ - private int blockNo; - - public FlatMappedBlockReader(BlockReader source, Function<Block, List<Block>> trans) { - reader = source; - transform = trans; - - blockNo = 0; - } - - @Override - public boolean hasNextBlock() { - return pending.hasNext() || reader.hasNextBlock(); - } - - @Override - public Block getBlock() { - return current; - } - - @Override - public boolean nextBlock() { - /* - * Attempt to get a new pending list if the one we have isn't - * valid. - */ - while(pending == null || !pending.hasNext()) { - if(!reader.hasNext()) return false; - - pending = transform.apply(reader.next()).iterator(); - } - - /* - * Advance the iterator. - */ - current = pending.next(); - blockNo += 1; - - return true; - } - - @Override - public int getBlockCount() { - return blockNo; - } - - @Override - public void close() throws IOException { - reader.close(); - } -} |
