ml.shifu.guagua.util
类 DiskList<T extends Serializable>

java.lang.Object
  ml.shifu.guagua.util.DiskList<T>

所有已实现的接口：

Iterable<T>, AppendList<T>

public class DiskList<T extends Serializable>
extends Object
implements AppendList<T>

A list wrapper to implement store data into disk.

No size limit for this list but user should make sure valid fileName when constructing.

Only two stages support in such kind of list. The first one is WRITE, the next is read. So far random WRITE and READ are not supported in this list.

WARNING: close() should be called at last if use such List.

作者：

Zhang David (pengzhang@paypal.com)

嵌套类摘要

从接口 ml.shifu.guagua.util.AppendList 继承的嵌套类/接口

AppendList.State

构造方法摘要

DiskList(String fileName)
Constructor with file name in current working dir.

方法摘要

boolean	append(T t) Append object to this list
void	clear() Clear all elements.
void	close() This method should be called at the end of DiskList usage to release file descriptors.
ObjectSerializer<T>	getSerializer()
Iterator<T>	iterator()
void	reOpen() Re-open stream for iterators.
void	setSerializer(ObjectSerializer<T> serializer)
long	size() Return size of this list.
void	switchState() Switch state from WRITE to READ

从类 java.lang.Object 继承的方法

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

构造方法详细信息

DiskList

public DiskList(String fileName)

Constructor with file name in current working dir.

方法详细信息

switchState

public void switchState()

Switch state from WRITE to READ

指定者：

接口 AppendList<T extends Serializable> 中的 switchState

reOpen

public void reOpen()

Re-open stream for iterators.

append

public boolean append(T t)

从接口 AppendList 复制的描述

Append object to this list

指定者：

接口 AppendList<T extends Serializable> 中的 append

参数：

t - the object to append

返回：

whether appending object successful

close

public void close()

This method should be called at the end of DiskList usage to release file descriptors.

iterator

public Iterator<T> iterator()

指定者：

接口 Iterable<T extends Serializable> 中的 iterator

getSerializer

public ObjectSerializer<T> getSerializer()

返回：

the serializer

setSerializer

public void setSerializer(ObjectSerializer<T> serializer)

参数：

serializer - the serializer to set

size

public long size()

从接口 AppendList 复制的描述

Return size of this list.

指定者：

接口 AppendList<T extends Serializable> 中的 size

clear

public void clear()

从接口 AppendList 复制的描述

Clear all elements.

指定者：

接口 AppendList<T extends Serializable> 中的 clear