org.apache.commons.lang3.text.translate
Class CharSequenceTranslator

java.lang.Object
  org.apache.commons.lang3.text.translate.CharSequenceTranslator

Direct Known Subclasses:

AggregateTranslator, CodePointTranslator, LookupTranslator, NumericEntityUnescaper, OctalUnescaper, UnicodeUnescaper

public abstract class CharSequenceTranslator
extends Object

An API for translating text. Its core use is to escape and unescape text. Because escaping and unescaping is completely contextual, the API does not present two separate signatures.

Since:

3.0

Version:

$Id: CharSequenceTranslator.java 1146844 2011-07-14 18:49:51Z mbenson $

Constructor Summary

CharSequenceTranslator()

Method Summary

static String	hex(int codepoint) Returns an upper case hexadecimal String for the given character.
String	translate(CharSequence input) Helper for non-Writer usage.
abstract int	translate(CharSequence input, int index, Writer out) Translate a set of codepoints, represented by an int index into a CharSequence, into another set of codepoints.
void	translate(CharSequence input, Writer out) Translate an input onto a Writer.
CharSequenceTranslator	with(CharSequenceTranslator... translators) Helper method to create a merger of this translator with another set of translators.

Methods inherited from class java.lang.Object

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

Constructor Detail

CharSequenceTranslator

public CharSequenceTranslator()

Method Detail

translate

public abstract int translate(CharSequence input,
                              int index,
                              Writer out)
                       throws IOException

Translate a set of codepoints, represented by an int index into a CharSequence, into another set of codepoints. The number of codepoints consumed must be returned, and the only IOExceptions thrown must be from interacting with the Writer so that the top level API may reliable ignore StringWriter IOExceptions.

Parameters:

input - CharSequence that is being translated

index - int representing the current point of translation

out - Writer to translate the text to

Returns:

int count of codepoints consumed

Throws:

IOException - if and only if the Writer produces an IOException

translate

public final String translate(CharSequence input)

Helper for non-Writer usage.

Parameters:

input - CharSequence to be translated

Returns:

String output of translation

translate

public final void translate(CharSequence input,
                            Writer out)
                     throws IOException

Translate an input onto a Writer. This is intentionally final as its algorithm is tightly coupled with the abstract method of this class.

Parameters:

input - CharSequence that is being translated

out - Writer to translate the text to

Throws:

IOException - if and only if the Writer produces an IOException

with

public final CharSequenceTranslator with(CharSequenceTranslator... translators)

Helper method to create a merger of this translator with another set of translators. Useful in customizing the standard functionality.

Parameters:

translators - CharSequenceTranslator array of translators to merge with this one

Returns:

CharSequenceTranslator merging this translator with the others

hex

public static String hex(int codepoint)

Returns an upper case hexadecimal String for the given character.

Parameters:

codepoint - The codepoint to convert.

Returns:

An upper case hexadecimal String