net.pwall.util.pipeline

Class SwitchableDecoder<R>

java.lang.Object

net.pwall.util.pipeline.BaseAbstractAcceptor<R>

net.pwall.util.pipeline.AbstractIntAcceptor<R>

net.pwall.util.pipeline.AbstractIntPipeline<R>

net.pwall.util.pipeline.SwitchableDecoder<R>

Type Parameters:

R - the "Result" class (may be Void)

All Implemented Interfaces:

AutoCloseable, BaseAcceptor<R>, IntAcceptor<R>, IntPipeline<R>

public class SwitchableDecoder<R>
extends AbstractIntPipeline<R>

A switchable decoder that allows the encoding of an input stream to be determined from the data in the early part of the stream.

An XML file declares its encoding on the prefix line, and an HTML can contain a META tag specifying the content type and encoding of the data. These rely on the declaration occurring early in the file, before any characters outside the base ASCII set are expected to be encountered.

This decoder allows the reading of an input stream to commence in ASCII decoding, switching to the full decoding once the declaration has been read.

Author:

Peter Wall

Constructor Summary

Constructors

Constructor and Description
SwitchableDecoder(IntAcceptor<R> downstream)

Method Summary

Modifier and Type	Method and Description
void	acceptInt(int value) Accept an int, after closed check and test for end of data.
void	switchTo(Charset charset)
void	switchTo(String charsetName)

Methods inherited from class net.pwall.util.pipeline.AbstractIntPipeline

close, emit, flush, getResult, isComplete

Methods inherited from class net.pwall.util.pipeline.AbstractIntAcceptor

accept

Methods inherited from class net.pwall.util.pipeline.BaseAbstractAcceptor

isClosed

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.pwall.util.pipeline.IntAcceptor

accept, accept, accept, accept, accept

Methods inherited from interface net.pwall.util.pipeline.BaseAcceptor

isClosed

Constructor Detail

SwitchableDecoder

public SwitchableDecoder(IntAcceptor<R> downstream)

Method Detail

acceptInt

public void acceptInt(int value)
               throws Exception

Description copied from class: AbstractIntAcceptor

Accept an int, after closed check and test for end of data. Implementing classes must supply an implementation of this method.

Specified by:

acceptInt in class AbstractIntAcceptor<R>

Parameters:

value - the input value

Throws:

Exception - if thrown by a close() method

switchTo

public void switchTo(Charset charset)

switchTo

public void switchTo(String charsetName)