BlockFileLoader (bitcoinj-core 0.16.1 API)

java.lang.Object
- org.bitcoinj.utils.BlockFileLoader

All Implemented Interfaces:

java.lang.Iterable<Block>, java.util.Iterator<Block>
```
public class BlockFileLoader
extends java.lang.Object
implements java.lang.Iterable<Block>, java.util.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, 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 or higher) 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	Description
`BlockFileLoader(NetworkParameters params, java.io.File blocksDir)`
`BlockFileLoader(NetworkParameters params, java.util.List<java.io.File> files)`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static java.io.File`	`defaultBlocksDir()`
`static java.util.List<java.io.File>`	`getReferenceClientBlockFileList()`
`static java.util.List<java.io.File>`	`getReferenceClientBlockFileList(java.io.File blocksDir)`	Gets the list of files which contain blocks from Bitcoin Core.
`boolean`	`hasNext()`
`java.util.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,
                       java.io.File blocksDir)

BlockFileLoader

public BlockFileLoader(NetworkParameters params,
                       java.util.List<java.io.File> files)

Method Detail
- getReferenceClientBlockFileList
```
public static java.util.List<java.io.File> getReferenceClientBlockFileList(java.io.File blocksDir)
```
  Gets the list of files which contain blocks from Bitcoin Core.
- getReferenceClientBlockFileList
```
public static java.util.List<java.io.File> getReferenceClientBlockFileList()
```
- defaultBlocksDir
```
public static java.io.File defaultBlocksDir()
```
- hasNext
```
public boolean hasNext()
```
  Specified by:
  
  hasNext in interface java.util.Iterator<Block>
- next
```
public Block next()
           throws java.util.NoSuchElementException
```
  Specified by:
  
  next in interface java.util.Iterator<Block>
  
  Throws:
  
  java.util.NoSuchElementException
- remove
```
public void remove()
            throws java.lang.UnsupportedOperationException
```
  Specified by:
  
  remove in interface java.util.Iterator<Block>
  
  Throws:
  
  java.lang.UnsupportedOperationException
- iterator
```
public java.util.Iterator<Block> iterator()
```
  Specified by:
  
  iterator in interface java.lang.Iterable<Block>