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Diffstat (limited to 'buildscripts/phing/classes/phing/filters/util/ChainReaderHelper.php')
| -rw-r--r-- | buildscripts/phing/classes/phing/filters/util/ChainReaderHelper.php | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/buildscripts/phing/classes/phing/filters/util/ChainReaderHelper.php b/buildscripts/phing/classes/phing/filters/util/ChainReaderHelper.php new file mode 100644 index 00000000..80508a82 --- /dev/null +++ b/buildscripts/phing/classes/phing/filters/util/ChainReaderHelper.php @@ -0,0 +1,184 @@ +<?php +/* + * $Id: ChainReaderHelper.php,v 1.8 2005/02/27 20:52:09 mrook Exp $ + * + * 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: 2005/02/27 20:52:09 $ + * @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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