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<?php /* * $Id: ChainReaderHelper.php 325 2007-12-20 15:44:58Z hans $ * * 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/Project.php'; include_once 'phing/filters/BaseFilterReader.php'; include_once 'phing/types/PhingFilterReader.php'; include_once 'phing/types/FilterChain.php'; include_once 'phing/types/Parameter.php'; include_once 'phing/util/FileUtils.php'; include_once 'phing/util/StringHelper.php'; include_once 'phing/filters/ChainableReader.php'; /* * Process a FilterReader chain. * * Here, the interesting method is 'getAssembledReader'. * The purpose of this one is to create a simple Reader object which * apply all filters on another primary Reader object. * * For example : In copyFile (phing.util.FileUtils) the primary Reader * is a FileReader object (more accuratly, a BufferedReader) previously * setted for the source file to copy. So, consider this filterchain : * * <filterchain> * <stripphpcomments /> * <linecontains> * <contains value="foo"> * </linecontains> * <tabtospaces tablength="8" /> * </filterchain> * * getAssembledReader will return a Reader object wich read on each * of these filters. Something like this : ('->' = 'which read data from') : * * [TABTOSPACES] -> [LINECONTAINS] -> [STRIPPHPCOMMENTS] -> [FILEREADER] * (primary reader) * * So, getAssembledReader will return the TABTOSPACES Reader object. Then * each read done with this Reader object will follow this path. * * Hope this explanation is clear :) * * TODO: Implement the classPath feature. * * @author <a href="mailto:yl@seasonfive.com">Yannick Lecaillez</a> * @version $Revision: 1.8 $ $Date: 2007-12-20 15:44:58 +0000 (Thu, 20 Dec 2007) $ * @access public * @package phing.filters.util / class ChainReaderHelper { /* Primary reader to wich the reader chain is to be attached / private $primaryReader = null; /* The site of the buffer to be used. / private $bufferSize = 8192; /* Chain of filters / private $filterChains = array(); /* The Phing project / private $project; / * Sets the primary reader / function setPrimaryReader(Reader $reader) { $this->primaryReader = $reader; } / * Set the project to work with / function setProject(Project $project) { $this->project = $project; } / * Get the project / function getProject() { return $this->project; } / * Sets the buffer size to be used. Defaults to 8192, * if this method is not invoked. / function setBufferSize($size) { $this->bufferSize = $size; } / * Sets the collection of filter reader sets / function setFilterChains(&$fchain) { $this->filterChains = &$fchain; } / * Assemble the reader */ function getAssembledReader() { $instream = $this->primaryReader; $filterReadersCount = count($this->filterChains); $finalFilters = array(); // Collect all filter readers of all filter chains used ... for($i = 0 ; $i<$filterReadersCount ; $i++) { $filterchain = &$this->filterChains[$i]; $filterReaders = $filterchain->getFilterReaders(); $readerCount = count($filterReaders); for($j = 0 ; $j<$readerCount ; $j++) { $finalFilters[] = $filterReaders[$j]; } } // ... then chain the filter readers. $filtersCount = count($finalFilters); if ( $filtersCount > 0 ) { for($i = 0 ; $i<$filtersCount ; $i++) { $filter = $finalFilters[$i]; if ( $filter instanceof PhingFilterReader ) { // This filter reader is an external class. $className = $filter->getClassName(); $classpath = $filter->getClasspath(); $project = $filter->getProject(); if ( $className !== null ) { $cls = Phing::import($className, $classpath); $impl = new $cls(); } if ( !($impl instanceof FilterReader) ) { throw new Exception($className." does not extend phing.system.io.FilterReader"); } $impl->setReader($instream); // chain $impl->setProject($this->getProject()); // what about $project above ? if ( $impl instanceof Parameterizable ) { $impl->setParameters($filter->getParams()); } $instream = $impl; // now that it's been chained } elseif (($filter instanceof ChainableReader) && ($filter instanceof Reader)) { if ( $this->getProject() !== null && ($filter instanceof BaseFilterReader) ) { $filter->setProject($this->getProject()); } $instream = $filter->chain($instream); } else { throw new Exception("Cannot chain invalid filter: " . get_class($filter)); } } } return $instream; } }

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