Class Stream

Streaming interface base class.

Core\Object implements Core\Chainable

Core\Set implements Core\Accessor

Core\Stream

Direct known subclasses

Core\Stream\Buildin, Core\Stream\Driver\csv, Core\Stream\Driver\null

Indirect known subclasses

Core\Stream\Driver\file, Core\Stream\Driver\input, Core\Stream\Driver\memory, Core\Stream\Driver\output, Core\Stream\Driver\stderr, Core\Stream\Driver\stdin, Core\Stream\Driver\stdout, Core\Stream\Driver\swap

Abstract
Namespace: Core
Package: Core\Stream
Since: 3.0
Requires: PHP 5.3
Version: 1.0
Located at Stream.inc.php

Methods summary

`public`	# `__construct( Core\URI $uri )` Initialises a new stream interface. Initialises a new stream interface. Parameters `$uri` URI instance describing the stream interface to initialise. Since 3.0
`public`	# `__destruct( )` Automatically dismantles the stream, if required. Automatically dismantles the stream, if required. Since 3.0
`protected`	# `_verifyAccess( integer $access )` Parameters `$access` Throws `Core\Exception\Stream` Since 3.0
`public static Core\Stream`	# `autocreate( Core\URI $uri )` Creates a new stream object specified by the given URI. Creates a new stream object specified by the given URI. Parameters `$uri` URI object describing the requested stream interface. Returns `Core\Stream` New Stream object from given identifier. Throws `Core\Exception\InvalidDriver` Failed to load driver specified by the named interface. Since 3.0
`public boolean`	# `canCreate( )` Returns boolean Since 3.0
`public boolean`	# `canRead( )` Returns boolean Since 3.0
`public boolean`	# `canWrite( )` Returns boolean Since 3.0
`public boolean`	# `canStat( )` Returns boolean Since 3.0
`public boolean`	# `canTruncate( )` Returns boolean Since 3.0
`public integer\|boolean`	# `chain( Core\Chainable $object, array $flags = null )` Connects another object to the current object. Usage depends on the actual class implementation; common examples are lazy configuration completion or layer expansions. Assigned Encoder or Decoder wrappers to the current Stream object. Connects another object to the current object. Usage depends on the actual class implementation; common examples are lazy configuration completion or layer expansions. Assigned Encoder or Decoder wrappers to the current Stream object. Support for Encoder oder Decoder wrappers depend on the implementation of the derived Stream class. Supporting Stream derivations pass segments for writing through the chain of Encoders, read segments are passed through the chain of Decoders. Parameters `$object` Object to chain to instance. `$flags` Optional array of additional chain flags. Usage depends on the actual chain implementation. Returns integer\|boolean Returns a non-zero value on success, otherwise `false`. Throws `Core\Exception\InvalidArgument` Class of provided object is not supported. Since 3.0 Overrides `Core\Object::chain`
`public`	# `dismantle( )` Returns $this Event Delegate Stream.Dismantle triggered after a stream has been dismantled. Since 3.0
`public`	# `establish( integer $access )` Establishes the stream interface. Establishes the stream interface. Parameters `$access` Returns $this Since 3.0
`public boolean`	# `flush( )` Flushes any stream-specific output buffers. Flushes any stream-specific output buffers. This method is heavily depended on the actual driver back-end. The default implementation does nothing and returns `true`. Returns boolean `true` on success, otherwise `false`. Since 3.0
`abstract public integer\|null`	# `length( )` Returns the size of the Stream in units. Returns the size of the Stream in units. Returns integer\|null Size of stream in units or `null`, if length is unknown. Since 3.0
`abstract public mixed`	# `read( integer $units )` Reads from stream. Reads from stream. Parameters `$units` Length in units to read from stream. Returns mixed Returns segments read from stream or `null` on error. Remark Implementations of derived classes should implement support for chained Decoder instances. See `Core\Stream::readln()` Since 3.0
`public mixed\|null`	# `readln( integer $limit = null )` Reads a line from the stream. Reads a line from the stream. Parameters `$limit` Optional. Maximum number of units to read from stream. Returns mixed\|null Returns segments read from stream or `null` on error. Remark Chained Decoder instances are applied equally to the standard `Core\Stream::read()` method (with a ending newline character excluded). See `Core\Stream::read()` Since 3.0
`public mixed\|null`	# `readRemainingSegments( )` Reads all available segments from stream, if stream is finite. Reads all available segments from stream, if stream is finite. Returns mixed\|null Returns segments read from stream or `null`, if stream is infinite. Remark The default implementation is based on the value returned from `Core\Stream::length()`; thus even though a stream is finite, this method might not work as expected for incomplete wrappers. Since 3.0
`public static Core\Stream`	# `stderr( )` Returns a new and established standard error Stream object. Returns a new and established standard error Stream object. Returns `Core\Stream` New established standard error Stream object. See `Core\Stream::stdout()` `Core\Stream::stdin()` Since 3.1
`public static Core\Stream`	# `stdin( )` Returns a new and established standard input Stream object. Returns a new and established standard input Stream object. Returns `Core\Stream` New established standard input Stream object. See `Core\Stream::stdout()` `Core\Stream::stderr()` Since 3.1
`public static Core\Stream`	# `stdout( )` Returns a new and established standard output Stream object. Returns a new and established standard output Stream object. Returns `Core\Stream` New established standard output Stream object. See `Core\Stream::stderr()` `Core\Stream::stdin()` Since 3.1
`abstract public integer`	# `write( mixed $segments, integer $units = null )` Writes to stream. Writes to stream. Parameters `$segments` Segments to write to stream. `$units` Maximum number of units to write to stream. Returns integer Returns the number of units written to the stream. Remark Implementations of derived classes should implement support for chained Encoder instances. See `Core\Stream::writeln()` Since 3.0
`public integer`	# `writeln( string $string = null )` Writes a string, followed by a newline (LF) character, to the stream. Writes a string, followed by a newline (LF) character, to the stream. Parameters `$string` String to write to stream. Returns integer Returns the number of units written to the stream. Remark Chained Encoder instances are applied equaly to the standard `Core\Stream::write()` method (with the ending newline character included). See `Core\Stream::write()` Since 3.0

Methods inherited from Core\Set

__get(), __isset()

Methods inherited from Core\Object

__autocreateFactory(), __call(), __processParameters(), __toString(), attachMethod(), getValueForKey(), getValueForKeyPath(), getValueForUndefinedKey(), hash(), issetValueForKey(), setValueForKey(), setValueForKeyPath(), setValueForUndefinedKey(), uuid()

Constants summary

`string`	`CharsetParameter` Charset of Stream data (for reading and writing). Defaults to `false`, which does not perform on-the-fly character set translations. Charset of Stream data (for reading and writing). Defaults to `false`, which does not perform on-the-fly character set translations. Since 3.0	# `'charset'`
`integer`	`Stat` Access flag for readings stream status information. Access flag for readings stream status information. Since 3.0	# `1`
`integer`	`Read` Establishes Stream connection for reading. Establishes Stream connection for reading. Since 3.0	# `2`
`integer`	`Write` Establishes Stream connection for writing. Establishes Stream connection for writing. This flag does not create a non-existing the Stream endpoint. Write operations will append the Stream, if the Truncate flag is not set. See `Core\Stream::Create` `Core\Stream::Truncate` Since 3.0	# `4`
`integer`	`Truncate` Truncates the Stream if possible. Otherwise write operations append stream data. Truncates the Stream if possible. Otherwise write operations append stream data. Since 3.0	# `8`
`integer`	`Create` Creates the Stream endpoint, if the destination does not exist. Creates the Stream endpoint, if the destination does not exist. If this flag is not set, status flags, reading and writing will fail, if the Stream endpoint does not exist. Since 3.0	# `16`

Constants inherited from Core\Object

AnyParameterType, AutochainParameterType, AutocreateParameterType, BooleanParameterType, CharParameterType, EnumParameterType, IntegerParameterType, RealParameterType, StringParameterType, UserParameterType

Properties summary

`protected integer`	`$_v_access` Currently established access bit flags. Currently established access bit flags. Since 3.0	# `0`
`protected Core\Decoder`	`$_v_decoder` Active (chained) decoder instance or `null`, if no decoder is used. Active (chained) decoder instance or `null`, if no decoder is used. Since 3.0	#
`protected Core\Encoder`	`$_v_encoder` Active (chained) encoder instance or `null`, if no encoder is used. Active (chained) encoder instance or `null`, if no encoder is used. Since 3.0	#
`protected boolean`	`$_v_established` `true`, if stream is established, otherwise `false`. `true`, if stream is established, otherwise `false`. Since 3.0	#
`protected Core\Delegate`	`$_v_onDismantle` Delegate invoked if an established stream is dismantled. Delegate invoked if an established stream is dismantled. Since 3.1	#
`protected array`	`$_v_parameters` Associative array of Stream parameters set for this instance. Associative array of Stream parameters set for this instance. Since 3.0	#
`protected Core\URI`	`$_v_uri` URI used to create the current Stream instance. URI used to create the current Stream instance. Since 3.0	#

Magic properties

`public read-only integer`	`$access` Access status flag.
`public read-only boolean`	`$canCreate` `true`, if the stream is established and has create access, otherwise `false`.
`public read-only boolean`	`$canRead` `true`, if the stream is established and has read access, otherwise `false`.
`public read-only boolean`	`$canStat` `true`, if the stream is established and has stat access, otherwise `false`.
`public read-only boolean`	`$canTruncate` `true`, if the stream is established and has truncation enabled, otherwise `false`.
`public read-only boolean`	`$canWrite` `true`, if the stream is established and has write access, otherwise `false`.
`public read-only Core\Decoder`	`$decoder` Chained decoder instance to transparently decode data being read.
`public read-only Core\Encoder`	`$encoder` Chained encoder instance to transparently encode data being written.
`public read-only boolean`	`$established` `true`, if the stream is established, otherwise `false`.
`public read-only integer`	`$length` Length of the stream in units or `null`, if the length is unknown.
`public read-only Core\Delegate`	`$onDismantle` Callback invoked if stream is dismantled.
`public read-only array`	`$parameters` Associative array of stream parameters from configuration URI.
`public read-only Core\URI`	`$uri` Configuration URI.

Magic properties inherited from Core\Object

$hash, $uuid

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Class Stream

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Methods inherited from Core\Set

Methods inherited from Core\Object

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