org.bitcoinj.utils

Class BlockFileLoader

java.lang.Object

org.bitcoinj.utils.BlockFileLoader

All Implemented Interfaces:

Iterable<Block>, Iterator<Block>

public class BlockFileLoader
extends Object
implements Iterable<Block>, Iterator<Block>

This class reads block files stored in the Bitcoin Core format. This is simply a way to concatenate blocks together. Importing block data with this tool can be a lot faster than syncing over the network, if you have the files available.

In order to comply with Iterator<Block>, this class swallows a lot of IOExceptions, which may result in a few blocks being missed followed by a huge set of orphan blocks.

To blindly import all files which can be found in Bitcoin Core (version >= 0.8) datadir automatically, try this code fragment:
BlockFileLoader loader = new BlockFileLoader(BlockFileLoader.getReferenceClientBlockFileList());
for (Block block : loader) {
try { chain.add(block); } catch (Exception e) { }
}

Constructor Summary

Constructors

Constructor and Description
BlockFileLoader(NetworkParameters params, List<File> files)

Method Summary

Modifier and Type	Method and Description
static List<File>	getReferenceClientBlockFileList() Gets the list of files which contain blocks from Bitcoin Core.
boolean	hasNext()
Iterator<Block>	iterator()
Block	next()
void	remove()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Detail

BlockFileLoader

public BlockFileLoader(NetworkParameters params,
                       List<File> files)

Method Detail

getReferenceClientBlockFileList

public static List<File> getReferenceClientBlockFileList()

Gets the list of files which contain blocks from Bitcoin Core.

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<Block>

next

public Block next()
           throws NoSuchElementException

Specified by:

next in interface Iterator<Block>

Throws:

NoSuchElementException

remove

public void remove()
            throws UnsupportedOperationException

Specified by:

remove in interface Iterator<Block>

Throws:

UnsupportedOperationException

iterator

public Iterator<Block> iterator()

Specified by:

iterator in interface Iterable<Block>