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lib/symfony/vendor/phing/mappers/RegexpMapper.php

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+<?php
+/* 
+ *  $Id: RegexpMapper.php 3076 2006-12-18 08:52:12Z fabien $
+ *
+ * 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>. 
+ */
+
+require_once 'phing/mappers/FileNameMapper.php';
+include_once 'phing/util/StringHelper.php';
+include_once 'phing/util/regexp/Regexp.php';
+
+/**
+ * Uses regular expressions to perform filename transformations.
+ *
+ * @author Andreas Aderhold <andi@binarycloud.com>
+ * @author Hans Lellelid <hans@velum.net>
+ * @version $Revision: 1.9 $
+ * @package phing.mappers
+ */
+class RegexpMapper implements FileNameMapper {
+
+    /**
+     * @var string
+     */
+    private $to;
+    
+    /**
+     * The Regexp engine.
+     * @var Regexp
+     */
+    private $reg;
+
+    function __construct() {                
+        // instantiage regexp matcher here
+        $this->reg = new Regexp();
+    }
+
+    /**
+     * Sets the &quot;from&quot; pattern. Required.
+     */
+    function setFrom($from) {
+        $this->reg->SetPattern($from);
+    }
+
+    /**
+     * Sets the &quot;to&quot; pattern. Required.
+     */
+    function setTo($to) {
+    
+        // [HL] I'm changing the way this works for now to just use string
+        //$this->to = StringHelper::toCharArray($to);
+        
+        $this->to = $to;
+    }
+
+    function main($sourceFileName) {
+        if ($this->reg === null  || $this->to === null || !$this->reg->matches((string) $sourceFileName)) {
+            return null;
+        }
+        return array($this->replaceReferences($sourceFileName));
+    }
+
+    /**
+     * Replace all backreferences in the to pattern with the matched groups.
+     * groups of the source.
+     * @param string $source The source filename.
+     */
+    private function replaceReferences($source) {
+        
+        // FIXME
+        // Can't we just use engine->replace() to handle this?  the Preg engine
+        // will automatically convert \1 references to $1
+        
+        // the expression has already been processed (when ->matches() was run in Main())
+        // so no need to pass $source again to the engine.
+        $groups = (array) $this->reg->getGroups();            
+        
+        // replace \1 with value of $groups[1] and return the modified "to" string
+        return preg_replace('/\\\([\d]+)/e', "\$groups[$1]", $this->to);            
+    }
+    
+}
+