Package org.apache.tomcat.util.buf
package org.apache.tomcat.util.buf
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 an ISReader/OSWriter and keep everything allocated to do the conversions in any VM without any garbage.
This package must accommodate future extensions and additional converters ( most important: 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.
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ClassDescriptionBase class for the *Chunk implementation to reduce duplication.This class implements some basic ASCII character handling functions.This is a very basic ASN.1 parser that provides the limited functionality required by Tomcat.NIO based character decoder.Simple wrapper for aByteBufferthat remembers if the buffer has been flipped or not.This class is used to represent a chunk of bytes, and utilities to manipulate byte[].Input interface, used when the buffer is empty.When we need more space we'll either grow the buffer ( up to the limit ) or send it to a channel.NIO based character encoder.Utilities to manipulate char chunks.Input interface, used when the buffer is empty.When we need more space we'll either grow the buffer ( up to the limit ) or send it to a channel.Tables useful when converting byte arrays to and from strings of hexadecimal digits.This class is used to represent a subarray of bytes in an HTTP message.This class implements a String cache for ByteChunk and CharChunk.Utility methods to build a separated list from a given set (not java.util.Set) of inputs and return that list as a string or append it to an existing StringBuilder.All URL decoding happens here.Efficient implementation of a UTF-8 encoder.Utility class for working with URIs and URLs.Encodes characters as bytes using UTF-8.