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<?php
/*
* $Id: 0a881c0b67c96c20345980fd033f006379949dda $
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the LGPL. For more information please see
* <http://phing.info>.
*/
include_once 'phing/filters/BaseParamFilterReader.php';
include_once 'phing/types/RegularExpression.php';
include_once 'phing/filters/ChainableReader.php';
/**
* Filter which includes only those lines that contain the user-specified
* regular expression matching strings.
*
* Example:
* <pre><linecontainsregexp>
* <regexp pattern="foo*">
* </linecontainsregexp></pre>
*
* Or:
*
* <pre><filterreader classname="phing.filters.LineContainsRegExp">
* <param type="regexp" value="foo*"/>
* </filterreader></pre>
*
* This will fetch all those lines that contain the pattern <code>foo</code>
*
* @author Yannick Lecaillez <yl@seasonfive.com>
* @author Hans Lellelid <hans@xmpl.org>
* @version $Id$
* @see FilterReader
* @package phing.filters
*/
class LineContainsRegexp extends BaseParamFilterReader implements ChainableReader {
/**
* Parameter name for regular expression.
* @var string
*/
const REGEXP_KEY = "regexp";
/**
* Regular expressions that are applied against lines.
* @var array
*/
private $_regexps = array();
/**
* Returns all lines in a buffer that contain specified strings.
* @return mixed buffer, -1 on EOF
*/
function read($len = null) {
if ( !$this->getInitialized() ) {
$this->_initialize();
$this->setInitialized(true);
}
$buffer = $this->in->read($len);
if ($buffer === -1) {
return -1;
}
$lines = explode("\n", $buffer);
$matched = array();
$regexpsSize = count($this->_regexps);
foreach($lines as $line) {
for($i = 0 ; $i<$regexpsSize ; $i++) {
$regexp = $this->_regexps[$i];
$re = $regexp->getRegexp($this->getProject());
$matches = $re->matches($line);
if ( !$matches ) {
$line = null;
break;
}
}
if($line !== null) {
$matched[] = $line;
}
}
$filtered_buffer = implode("\n", $matched);
return $filtered_buffer;
}
/**
* Adds a <code>regexp</code> element.
*
* @return object regExp The <code>regexp</code> element added.
*/
function createRegexp() {
$num = array_push($this->_regexps, new RegularExpression());
return $this->_regexps[$num-1];
}
/**
* Sets the vector of regular expressions which must be contained within
* a line read from the original stream in order for it to match this
* filter.
*
* @param regexps An array of regular expressions which must be contained
* within a line in order for it to match in this filter. Must not be
* <code>null</code>.
*/
function setRegexps($regexps) {
// type check, error must never occur, bad code of it does
if ( !is_array($regexps) ) {
throw new Exception("Excpected an 'array', got something else");
}
$this->_regexps = $regexps;
}
/**
* Returns the array of regular expressions which must be contained within
* a line read from the original stream in order for it to match this
* filter.
*
* @return array The array of regular expressions which must be contained within
* a line read from the original stream in order for it to match this
* filter. The returned object is "live" - in other words, changes made to
* the returned object are mirrored in the filter.
*/
function getRegexps() {
return $this->_regexps;
}
/**
* Creates a new LineContainsRegExp using the passed in
* Reader for instantiation.
*
* @param object A Reader object providing the underlying stream.
* Must not be <code>null</code>.
*
* @return object A new filter based on this configuration, but filtering
* the specified reader
*/
function chain(Reader $reader) {
$newFilter = new LineContainsRegExp($reader);
$newFilter->setRegexps($this->getRegexps());
$newFilter->setInitialized(true);
$newFilter->setProject($this->getProject());
return $newFilter;
}
/**
* Parses parameters to add user defined regular expressions.
*/
private function _initialize() {
$params = $this->getParameters();
if ( $params !== null ) {
for($i = 0 ; $i<count($params) ; $i++) {
if ( self::REGEXP_KEY === $params[$i]->getType() ) {
$pattern = $params[$i]->getValue();
$regexp = new RegularExpression();
$regexp->setPattern($pattern);
array_push($this->_regexps, $regexp);
}
}
}
}
}
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