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<?php
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/**
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 *
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 * This software consists of voluntary contributions made by many individuals
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 * and is licensed under the LGPL. For more information please see
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 * <http://phing.info>.
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 */
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/**
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 * Condition that tests whether a given property has been set.
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 *
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 * @author  Hans Lellelid <hans@xmpl.org> (Phing)
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 * @author  Stefan Bodewig <stefan.bodewig@epost.de> (Ant)
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 * @package phing.tasks.system.condition
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 */
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class IsSetCondition extends ProjectComponent implements Condition
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{
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    private $property;
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    /**
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     * @param $p
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     */
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    public function setProperty($p)
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    {
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        $this->property = $p;
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    }
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    /**
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     * Check whether property is set.
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     *
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     * @throws BuildException
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     */
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    public function evaluate()
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    {
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        if ($this->property === null) {
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            throw new BuildException(
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                "No property specified for isset "
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                . "condition"
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            );
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        }
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        return $this->project->getProperty($this->property) !== null;
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    }
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}

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