.
*/
require_once 'phing/filters/BaseFilterReader.php';
include_once 'phing/filters/ChainableReader.php';
include_once 'phing/types/RegularExpression.php';
/**
* Performs a regexp find/replace on stream.
*
* Example:
*
*
*
*
*
*
*
* @author Hans Lellelid
* @version $Id$
* @package phing.filters
*/
class ReplaceRegexp extends BaseFilterReader implements ChainableReader {
/**
* @var array RegularExpression[]
*/
private $regexps = array();
/**
* Creator method handles nested tags.
* @return RegularExpression
*/
function createRegexp() {
$num = array_push($this->regexps, new RegularExpression());
return $this->regexps[$num-1];
}
/**
* Sets the current regexps.
* (Used when, e.g., cloning/chaining the method.)
* @param array RegularExpression[]
*/
function setRegexps($regexps) {
$this->regexps = $regexps;
}
/**
* Gets the current regexps.
* (Used when, e.g., cloning/chaining the method.)
* @return array RegularExpression[]
*/
function getRegexps() {
return $this->regexps;
}
/**
* Returns the filtered stream.
* The original stream is first read in fully, and the regex replace is performed.
*
* @param int $len Required $len for Reader compliance.
*
* @return mixed The filtered stream, or -1 if the end of the resulting stream has been reached.
*
* @exception IOException if the underlying stream throws an IOException
* during reading
*/
function read($len = null) {
$buffer = $this->in->read($len);
if($buffer === -1) {
return -1;
}
// perform regex replace here ...
foreach($this->regexps as $exptype) {
$regexp = $exptype->getRegexp($this->project);
try {
$buffer = $regexp->replace($buffer);
$this->log("Performing regexp replace: /".$regexp->getPattern()."/".$regexp->getReplace()."/g".$regexp->getModifiers(), Project::MSG_VERBOSE);
} catch (Exception $e) {
// perhaps mismatch in params (e.g. no replace or pattern specified)
$this->log("Error performing regexp replace: " . $e->getMessage(), Project::MSG_WARN);
}
}
return $buffer;
}
/**
* Creates a new ReplaceRegExp filter using the passed in
* Reader for instantiation.
*
* @param Reader $reader A Reader object providing the underlying stream.
* Must not be null.
*
* @return ReplaceRegExp A new filter based on this configuration, but filtering
* the specified reader
*/
function chain(Reader $reader) {
$newFilter = new ReplaceRegExp($reader);
$newFilter->setProject($this->getProject());
$newFilter->setRegexps($this->getRegexps());
return $newFilter;
}
}