Package org.eclipse.jetty.util

Class Utf8Appendable

java.lang.Object

org.eclipse.jetty.util.Utf8Appendable

Direct Known Subclasses:

NullAppendable, Utf8StringBuffer, Utf8StringBuilder

public abstract class Utf8Appendable
extends Object

Utf8 Appendable abstract base class This abstract class wraps a standard Appendable and provides methods to append UTF-8 encoded bytes, that are converted into characters. This class is stateful and up to 4 calls to append(byte) may be needed before state a character is appended to the string buffer. The UTF-8 decoding is done by this class and no additional buffers or Readers are used. The UTF-8 code was inspired by http://bjoern.hoehrmann.de/utf-8/decoder/dfa/ License information for Bjoern Hoehrmann's code: Copyright (c) 2008-2009 Bjoern Hoehrmann <bjoern@hoehrmann.de> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Utf8Appendable.NotUtf8Exception

Field Summary

Fields

Modifier and Type	Field	Description
protected final Appendable	_appendable
protected int	_state
protected static final org.slf4j.Logger	LOG
static final char	REPLACEMENT
static final byte[]	REPLACEMENT_UTF8

Constructor Summary

Constructors

Constructor	Description
Utf8Appendable(Appendable appendable)

Method Summary

Modifier and Type	Method	Description
void	append(byte b)
void	append(byte[] b)
void	append(byte[] b, int offset, int length)
boolean	append(byte[] b, int offset, int length, int maxChars)
void	append(char c)
void	append(String s)
void	append(String s, int offset, int length)
void	append(ByteBuffer buf)
protected void	appendByte(byte b)
void	checkState()
abstract String	getPartialString()
boolean	isUtf8SequenceComplete()
abstract int	length()
protected void	reset()
String	takePartialString()	Take the partial string an reset in internal buffer, but retain partial code points.
String	toReplacedString()

Methods inherited from class java.lang.Object

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

Field Details

LOG

protected static final org.slf4j.Logger LOG

REPLACEMENT

public static final char REPLACEMENT

See Also:

• Constant Field Values

REPLACEMENT_UTF8

public static final byte[] REPLACEMENT_UTF8

_appendable

protected final Appendable _appendable

_state

protected int _state

Constructor Details

Utf8Appendable

public Utf8Appendable(Appendable appendable)

Method Details

length

public abstract int length()

reset

protected void reset()

append

public void append(char c)

append

public void append(String s)

append

public void append(String s,
 int offset,
 int length)

append

public void append(byte b)

append

public void append(ByteBuffer buf)

append

public void append(byte[] b)

append

public void append(byte[] b,
 int offset,
 int length)

append

public boolean append(byte[] b,
 int offset,
 int length,
 int maxChars)

appendByte

protected void appendByte(byte b)
                   throws IOException

Throws:

IOException

isUtf8SequenceComplete

public boolean isUtf8SequenceComplete()

checkState

public void checkState()

getPartialString

public abstract String getPartialString()

Returns:

The UTF8 so far decoded, ignoring partial code points

takePartialString

public String takePartialString()

Take the partial string an reset in internal buffer, but retain partial code points.

Returns:

The UTF8 so far decoded, ignoring partial code points

toReplacedString

public String toReplacedString()