Package org.apache.tomcat.util.buf

Buffers and Encodings

This package contains buffers and utils to perform encoding/decoding of buffers.

Interface Summary

ByteChunk.ByteInputChannel
ByteChunk.ByteOutputChannel
CharChunk.CharInputChannel
CharChunk.CharOutputChannel When we need more space we'll either grow the buffer ( up to the limit ) or send it to a channel.

Class Summary

Ascii This class implements some basic ASCII character handling functions.
B2CConverterEfficient conversion of bytes to character .
Base64 This class provides encode/decode for RFC 2045 Base64 as defined by RFC 2045, N.
ByteChunk This class is used to represent a chunk of bytes, and utilities to manipulate byte[].
C2BConverterEfficient conversion of character to bytes.
CharChunk Utilities to manipluate char chunks.
DateTool Common place for date utils.
HexUtils Library of utility methods useful in dealing with converting byte arrays to and from strings of hexadecimal digits.
MessageBytes This class is used to represent a subarray of bytes in an HTTP message.
MessageBytes.MessageBytesFactory
TimeStamp Main tool for object expiry.
UDecoder All URL decoding happens here.
UEncoderEfficient implementation for encoders.
UTF8Decoder Moved from ByteChunk - code to convert from UTF8 bytes to chars.

Buffers and Encodings

This package contains buffers and utils to perform encoding/decoding of buffers. That includes byte to char conversions, URL encodings, etc.

Encoding is a critical operation for performance. There are few tricks in this package - the C2B and B2C converters are caching a ISReader/OSWriter and keep everything allocated to do the conversions in any VM without any garbage.

This package must accomodate future extensions and additional converters ( most imporant: the nio.charset, which should be detected and used if available ). Also, we do have one hand-written UTF8Decoder, and other tuned encoders could be added.

My benchmarks ( I'm costin :-) show only small differences between C2B, B2C and hand-written codders/decoders, so UTF8Decoder may be disabled.


Copyright B) 2000-2003 Apache Software Foundation. All Rights Reserved.