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+<?php
+
+/*
+ * $Id: AbstractHandler.php,v 1.6 2004/02/27 18:16:10 hlellelid 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/parser/ExpatParseException.php';
+
+/**
+ * This is an abstract class all SAX handler classes must extend
+ *
+ * @author Andreas Aderhold <andi@binarycloud.com>
+ * @copyright © 2001,2002 THYRELL. All rights reserved
+ * @version $Revision: 1.6 $
+ * @package phing.parser
+ */
+abstract class AbstractHandler {
+
+ public $parentHandler = null;
+ public $parser = null;
+
+ /**
+ * Constructs a SAX handler parser.
+ *
+ * The constructor must be called by all derived classes.
+ *
+ * @param object the parser object
+ * @param object the parent handler of this handler
+ */
+ protected function __construct($parser, $parentHandler) {
+ $this->parentHandler = $parentHandler;
+ $this->parser = $parser;
+ $this->parser->setHandler($this);
+ }
+
+ /**
+ * Gets invoked when a XML open tag occurs
+ *
+ * Must be overloaded by the child class. Throws an ExpatParseException
+ * if there is no handler registered for an element.
+ *
+ * @param string the name of the XML element
+ * @param array the attributes of the XML element
+ */
+ public function startElement($name, $attribs) {
+ throw new ExpatParseException("Unexpected element $name");
+ }
+
+ /**
+ * Gets invoked when element closes method.
+ *
+ */
+ protected function finished() {}
+
+ /**
+ * Gets invoked when a XML element ends.
+ *
+ * Can be overloaded by the child class. But should not. It hands
+ * over control to the parentHandler of this.
+ *
+ * @param string the name of the XML element
+ */
+ public function endElement($name) {
+ $this->finished();
+ $this->parser->setHandler($this->parentHandler);
+ }
+
+ /**
+ * Invoked by occurance of #PCDATA.
+ *
+ * @param string the name of the XML element
+ * @exception ExpatParserException if there is no CDATA but method
+ * was called
+ * @access public
+ */
+ public function characters($data) {
+ $s = trim($data);
+ if (strlen($s) > 0) {
+ throw new ExpatParseException("Unexpected text '$s'", $this->parser->getLocation());
+ }
+ }
+}