# filters/PrefixLines.php

## \PrefixLines
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Package: phing\filters

Attaches a prefix to every line.

Example:

Or:

Implements
  \ChainableReader
Parent(s)
  \BaseParamFilterReader < \BaseFilterReader < \FilterReader < \Reader
See
  \FilterReader
Access
  public
Author
  Yannick Lecaillez
Author
  hans lellelid, hans@velum.net
Copyright
  © 2003 seasonfive. All rights reserved
Version
  $Revision: 526 $ $Date: 2009-08-11 14:11:17 +0200 (Tue, 11 Aug 2009) $

### Constants

`string PREFIX_KEY = "lines"`

Parameter name for the prefix.

  string

### Properties

`$_parameters= 'array()'`
inherited

The passed in parameter array.

Inherited from: \BaseParamFilterReader::$$_parameters
Default value `array()`Details

Type
  n/a
Inherited_from
  \BaseParamFilterReader::$$_parameters

`string $_prefix= 'null'`

The prefix to be used.

Default value `null` Details

Type
  string

`$initialized= 'false'`
inherited

Have the parameters passed been interpreted?

Inherited from: \BaseFilterReader::$$initialized\BaseParamFilterReader::$$initialized
Default value `false` Details

Type
  n/a
Inherited_from
  \BaseFilterReader::$$initialized
Inherited_from
  \BaseParamFilterReader::$$initialized

`$project= 'null'`
inherited

The Phing project this filter is part of.

Inherited from: \BaseFilterReader::$$project\BaseParamFilterReader::$$project
Default value `null` Details

Type
  n/a
Inherited_from
  \BaseFilterReader::$$project
Inherited_from
  \BaseParamFilterReader::$$project

### Methods

`__construct( \Reader $in = null ) : void`
inherited

Constructor used by Phing's introspection mechanism.

Inherited from: \BaseFilterReader::__construct()\BaseParamFilterReader::__construct()

The original filter reader is only used for chaining purposes, never for filtering purposes (and indeed it would be useless for filtering purposes, as it has no real data to filter). ChainedReaderHelper uses this placeholder instance to create a chain of real filters.

Parameters

Name | Type | Description
--- | --- | ---
$in | \Reader |

`_initialize( ) : void`

Initializes the prefix if it is available from the parameters.

`chain( object $reader ) : object`

Creates a new PrefixLines filter using the passed in Reader for instantiation.

Parameters

Name | Type | Description
--- | --- | ---
$reader | object | A Reader object providing the underlying stream. Must not be `null`.

Returns

Type | Description
--- | ---
object | A new filter based on this configuration, but filtering the specified reader

`close( ) : void`
inherited

Inherited from: FilterReader::close()\BaseFilterReader::close()\BaseParamFilterReader::close()
`eof( ) : boolean`
inherited

Returns whether the end of file has been reached with input stream.

Inherited from: \BaseFilterReader::eof()\BaseParamFilterReader::eof()
Returns

Type | Description
--- | ---
boolean |

`getInitialized( ) : boolean`
inherited

Returns the initialized status.

Inherited from: \BaseFilterReader::getInitialized()\BaseParamFilterReader::getInitialized()
Returns

Type | Description
--- | ---
boolean | whether or not the filter is initialized

`getParameters( ) : void`
inherited

Inherited from: \BaseParamFilterReader::getParameters()
`getPrefix( ) : string`

Returns the prefix which will be added at the start of each input line.

Returns

Type | Description
--- | ---
string | The prefix which will be added at the start of each input line

`getProject( ) : object`
inherited

Returns the project this filter is part of.

Inherited from: \BaseFilterReader::getProject()\BaseParamFilterReader::getProject()
Returns

Type | Description
--- | ---
object | The project this filter is part of

`getResource( ) : void`
inherited

Inherited from: FilterReader::getResource()\BaseFilterReader::getResource()\BaseParamFilterReader::getResource()
`log( string $msg, int $level = Project::MSG_INFO ) : void`
inherited

Convenience method to support logging in filters.

Inherited from: \BaseFilterReader::log()\BaseParamFilterReader::log()
Parameters

Name | Type | Description
--- | --- | ---
$msg | string | Message to log.
$level | int | Priority level.

`mark( ) : void`
inherited

Inherited from: Reader::mark()\BaseFilterReader::mark()\BaseParamFilterReader::mark()
`markSupported( ) : void`
inherited

Inherited from: Reader::markSupported()\BaseFilterReader::markSupported()\BaseParamFilterReader::markSupported()
`read( \off $len = null ) : mixed`

Adds a prefix to each line of input stream and returns resulting stream.

Parameters

Name | Type | Description
--- | --- | ---
$len | \off | Offset at which to start storing characters.

Returns

Type | Description
--- | ---
mixed | buffer, -1 on EOF

Throws

Exception | Description
--- | ---
\IOException | If an I/O error occurs

`readLine( ) : \the`
inherited

Reads a line of text ending with '\n' (or until the end of the stream).

Inherited from: \BaseFilterReader::readLine()\BaseParamFilterReader::readLine()

The returned String retains the '\n'.

Returns

Type | Description
--- | ---
\the | line read, or <code>null</code> if the end of the stream has already been reached

Throws

Exception | Description
--- | ---
\IOException | if the underlying reader throws one during reading

`ready( ) : void`
inherited

Inherited from: Reader::ready()\BaseFilterReader::ready()\BaseParamFilterReader::ready()
`reset( ) : void`
inherited

Inherited from: FilterReader::reset()\BaseFilterReader::reset()\BaseParamFilterReader::reset()
`setInitialized( boolean $initialized ) : void`
inherited

Sets the initialized status.

Inherited from: \BaseFilterReader::setInitialized()\BaseParamFilterReader::setInitialized()
Parameters

Name | Type | Description
--- | --- | ---
$initialized | boolean | Whether or not the filter is initialized.

`setParameters( $parameters ) : void`
inherited

Inherited from: \BaseParamFilterReader::setParameters()
Parameters

Name | Type | Description
--- | --- | ---
$parameters |  |

`setPrefix( string $prefix ) : void`

Sets the prefix to add at the start of each input line.

Parameters

Name | Type | Description
--- | --- | ---
$prefix | string | The prefix to add at the start of each input line. May be `null`, in which case no prefix is added.

`setProject( object $project ) : void`
inherited

Sets the project to work with.

Inherited from: \BaseFilterReader::setProject()\BaseParamFilterReader::setProject()
Parameters

Name | Type | Description
--- | --- | ---
$project | object | The project this filter is part of. Should not be `null`.

`setReader( ) : void`
inherited

Inherited from: FilterReader::setReader()\BaseFilterReader::setReader()\BaseParamFilterReader::setReader()
`skip( ) : void`
inherited

Inherited from: FilterReader::skip()\BaseFilterReader::skip()\BaseParamFilterReader::skip()
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