diff options
Diffstat (limited to 'buildscripts/phing/classes/phing/tasks/system/IfTask.php')
| -rw-r--r-- | buildscripts/phing/classes/phing/tasks/system/IfTask.php | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/buildscripts/phing/classes/phing/tasks/system/IfTask.php b/buildscripts/phing/classes/phing/tasks/system/IfTask.php new file mode 100644 index 00000000..cff06ce1 --- /dev/null +++ b/buildscripts/phing/classes/phing/tasks/system/IfTask.php @@ -0,0 +1,227 @@ +<?php + +/* + * $Id: 4452f066ac71d51d3e2521d39cdee2caf4f7e9cc $ + * + * 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/tasks/system/condition/ConditionBase.php'; +require_once 'phing/tasks/system/SequentialTask.php'; + +/** + * Perform some tasks based on whether a given condition holds true or + * not. + * + * <p>This task is heavily based on the Condition framework that can + * be found in Ant 1.4 and later, therefore it cannot be used in + * conjunction with versions of Ant prior to 1.4.</p> + * + * <p>This task doesn't have any attributes, the condition to test is + * specified by a nested element - see the documentation of your + * <code><condition></code> task (see + * <a href="http://jakarta.apache.org/ant/manual/CoreTasks/condition.html">the + * online documentation</a> for example) for a complete list of nested + * elements.</p> + * + * <p>Just like the <code><condition></code> task, only a single + * condition can be specified - you combine them using + * <code><and></code> or <code><or></code> conditions.</p> + * + * <p>In addition to the condition, you can specify three different + * child elements, <code><elseif></code>, <code><then></code> and + * <code><else></code>. All three subelements are optional. + * + * Both <code><then></code> and <code><else></code> must not be + * used more than once inside the if task. Both are + * containers for Ant tasks, just like Ant's + * <code><parallel></code> and <code><sequential></code> + * tasks - in fact they are implemented using the same class as Ant's + * <code><sequential></code> task.</p> + * + * The <code><elseif></code> behaves exactly like an <code><if></code> + * except that it cannot contain the <code><else></code> element + * inside of it. You may specify as may of these as you like, and the + * order they are specified is the order they are evaluated in. If the + * condition on the <code><if></code> is false, then the first + * <code><elseif></code> who's conditional evaluates to true + * will be executed. The <code><else></code> will be executed + * only if the <code><if></code> and all <code><elseif></code> + * conditions are false. + * + * <p>Use the following task to define the <code><if></code> + * task before you use it the first time:</p> + * + * <pre><code> + * <taskdef name="if" classname="net.sf.antcontrib.logic.IfTask" /> + * </code></pre> + * + * <h3>Crude Example</h3> + * + * <code> + * <if> + * <equals arg1="${foo}" arg2="bar" /> + * <then> + * <echo message="The value of property foo is bar" /> + * </then> + * <else> + * <echo message="The value of property foo is not bar" /> + * </else> + * </if> + * </code> + * + * <code> + * <if> + * <equals arg1="${foo}" arg2="bar" /> + * <then> + * <echo message="The value of property foo is 'bar'" /> + * </then> + * + * <elseif> + * <equals arg1="${foo}" arg2="foo" /> + * <then> + * <echo message="The value of property foo is 'foo'" /> + * </then> + * </elseif> + * + * <else> + * <echo message="The value of property foo is not 'foo' or 'bar'" /> + * </else> + * </if> + * </code> + * + * @author <a href="mailto:stefan.bodewig@freenet.de">Stefan Bodewig</a> + * @package phing.tasks.system + */ +class IfTask extends ConditionBase { + + + private $thenTasks = null; + private $elseIfTasks = array(); + private $elseTasks = null; + + /*** + * A nested Else if task + */ + public function addElseIf(ElseIfTask $ei) + { + $this->elseIfTasks[] = $ei; + } + + /** + * A nested <then> element - a container of tasks that will + * be run if the condition holds true. + * + * <p>Not required.</p> + */ + public function addThen(SequentialTask $t) { + if ($this->thenTasks != null) { + throw new BuildException("You must not nest more than one <then> into <if>"); + } + $this->thenTasks = $t; + } + + /** + * A nested <else> element - a container of tasks that will + * be run if the condition doesn't hold true. + * + * <p>Not required.</p> + */ + public function addElse(SequentialTask $e) { + if ($this->elseTasks != null) { + throw new BuildException("You must not nest more than one <else> into <if>"); + } + $this->elseTasks = $e; + } + + public function main() { + + if ($this->countConditions() > 1) { + throw new BuildException("You must not nest more than one condition into <if>"); + } + if ($this->countConditions() < 1) { + throw new BuildException("You must nest a condition into <if>"); + } + $conditions = $this->getConditions(); + $c = $conditions[0]; + + if ($c->evaluate()) { + if ($this->thenTasks != null) { + $this->thenTasks->main(); + } + } else { + $done = false; + $sz = count($this->elseIfTasks); + for($i=0; $i < $sz && !$done; $i++) { + $ei = $this->elseIfTasks[$i]; + if ($ei->evaluate()) { + $done = true; + $ei->main(); + } + } + + if (!$done && $this->elseTasks != null) { + $this->elseTasks->main(); + } + } + } +} + +/** + * "Inner" class for IfTask. + * This class has same basic structure as the IfTask, although of course it doesn't support <else> tags. + * + * @package phing.tasks.system + */ +class ElseIfTask extends ConditionBase { + + private $thenTasks = null; + + public function addThen(SequentialTask $t) { + if ($this->thenTasks != null) { + throw new BuildException("You must not nest more than one <then> into <elseif>"); + } + $this->thenTasks = $t; + } + + /** + * @return boolean + */ + public function evaluate() { + + if ($this->countConditions() > 1) { + throw new BuildException("You must not nest more than one condition into <elseif>"); + } + if ($this->countConditions() < 1) { + throw new BuildException("You must nest a condition into <elseif>"); + } + + $conditions = $this->getConditions(); + $c = $conditions[0]; + + return $c->evaluate(); + } + + /** + * + */ + public function main() { + if ($this->thenTasks != null) { + $this->thenTasks->main(); + } + } + } |