1 files changed, 149 insertions, 0 deletions

diff --git a/vendor/symfony/form/Symfony/Component/Form/Extension/Core/ChoiceList/LazyChoiceList.php b/vendor/symfony/form/Symfony/Component/Form/Extension/Core/ChoiceList/LazyChoiceList.php
new file mode 100644
index 00000000..996f900c
--- /dev/null
+++ b/vendor/symfony/form/Symfony/Component/Form/Extension/Core/ChoiceList/LazyChoiceList.php
@@ -0,0 +1,149 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Form\Extension\Core\ChoiceList;
+
+use Symfony\Component\Form\Exception\InvalidArgumentException;
+
+/**
+ * A choice list that is loaded lazily
+ *
+ * This list loads itself as soon as any of the getters is accessed for the
+ * first time. You should implement loadChoiceList() in your child classes,
+ * which should return a ChoiceListInterface instance.
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ */
+abstract class LazyChoiceList implements ChoiceListInterface
+{
+    /**
+     * The loaded choice list
+     *
+     * @var ChoiceListInterface
+     */
+    private $choiceList;
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getChoices()
+    {
+        if (!$this->choiceList) {
+            $this->load();
+        }
+
+        return $this->choiceList->getChoices();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getValues()
+    {
+        if (!$this->choiceList) {
+            $this->load();
+        }
+
+        return $this->choiceList->getValues();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getPreferredViews()
+    {
+        if (!$this->choiceList) {
+            $this->load();
+        }
+
+        return $this->choiceList->getPreferredViews();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getRemainingViews()
+    {
+        if (!$this->choiceList) {
+            $this->load();
+        }
+
+        return $this->choiceList->getRemainingViews();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getChoicesForValues(array $values)
+    {
+        if (!$this->choiceList) {
+            $this->load();
+        }
+
+        return $this->choiceList->getChoicesForValues($values);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getValuesForChoices(array $choices)
+    {
+        if (!$this->choiceList) {
+            $this->load();
+        }
+
+        return $this->choiceList->getValuesForChoices($choices);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getIndicesForChoices(array $choices)
+    {
+        if (!$this->choiceList) {
+            $this->load();
+        }
+
+        return $this->choiceList->getIndicesForChoices($choices);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getIndicesForValues(array $values)
+    {
+        if (!$this->choiceList) {
+            $this->load();
+        }
+
+        return $this->choiceList->getIndicesForValues($values);
+    }
+
+    /**
+     * Loads the choice list
+     *
+     * Should be implemented by child classes.
+     *
+     * @return ChoiceListInterface The loaded choice list
+     */
+    abstract protected function loadChoiceList();
+
+    private function load()
+    {
+        $choiceList = $this->loadChoiceList();
+
+        if (!$choiceList instanceof ChoiceListInterface) {
+            throw new InvalidArgumentException(sprintf('loadChoiceList() should return a ChoiceListInterface instance. Got %s', gettype($choiceList)));
+        }
+
+        $this->choiceList = $choiceList;
+    }
+}