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developer/vendor/symfony/console/Helper/HelperSet.php

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+<?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\Console\Helper;
+
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Exception\InvalidArgumentException;
+
+/**
+ * HelperSet represents a set of helpers to be used with a command.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class HelperSet implements \IteratorAggregate
+{
+    /**
+     * @var Helper[]
+     */
+    private $helpers = array();
+    private $command;
+
+    /**
+     * Constructor.
+     *
+     * @param Helper[] $helpers An array of helper
+     */
+    public function __construct(array $helpers = array())
+    {
+        foreach ($helpers as $alias => $helper) {
+            $this->set($helper, is_int($alias) ? null : $alias);
+        }
+    }
+
+    /**
+     * Sets a helper.
+     *
+     * @param HelperInterface $helper The helper instance
+     * @param string          $alias  An alias
+     */
+    public function set(HelperInterface $helper, $alias = null)
+    {
+        $this->helpers[$helper->getName()] = $helper;
+        if (null !== $alias) {
+            $this->helpers[$alias] = $helper;
+        }
+
+        $helper->setHelperSet($this);
+    }
+
+    /**
+     * Returns true if the helper if defined.
+     *
+     * @param string $name The helper name
+     *
+     * @return bool true if the helper is defined, false otherwise
+     */
+    public function has($name)
+    {
+        return isset($this->helpers[$name]);
+    }
+
+    /**
+     * Gets a helper value.
+     *
+     * @param string $name The helper name
+     *
+     * @return HelperInterface The helper instance
+     *
+     * @throws InvalidArgumentException if the helper is not defined
+     */
+    public function get($name)
+    {
+        if (!$this->has($name)) {
+            throw new InvalidArgumentException(sprintf('The helper "%s" is not defined.', $name));
+        }
+
+        if ('dialog' === $name && $this->helpers[$name] instanceof DialogHelper) {
+            @trigger_error('"Symfony\Component\Console\Helper\DialogHelper" is deprecated since version 2.5 and will be removed in 3.0. Use "Symfony\Component\Console\Helper\QuestionHelper" instead.', E_USER_DEPRECATED);
+        } elseif ('progress' === $name && $this->helpers[$name] instanceof ProgressHelper) {
+            @trigger_error('"Symfony\Component\Console\Helper\ProgressHelper" is deprecated since version 2.5 and will be removed in 3.0. Use "Symfony\Component\Console\Helper\ProgressBar" instead.', E_USER_DEPRECATED);
+        } elseif ('table' === $name && $this->helpers[$name] instanceof TableHelper) {
+            @trigger_error('"Symfony\Component\Console\Helper\TableHelper" is deprecated since version 2.5 and will be removed in 3.0. Use "Symfony\Component\Console\Helper\Table" instead.', E_USER_DEPRECATED);
+        }
+
+        return $this->helpers[$name];
+    }
+
+    /**
+     * Sets the command associated with this helper set.
+     *
+     * @param Command $command A Command instance
+     */
+    public function setCommand(Command $command = null)
+    {
+        $this->command = $command;
+    }
+
+    /**
+     * Gets the command associated with this helper set.
+     *
+     * @return Command A Command instance
+     */
+    public function getCommand()
+    {
+        return $this->command;
+    }
+
+    /**
+     * @return Helper[]
+     */
+    public function getIterator()
+    {
+        return new \ArrayIterator($this->helpers);
+    }
+}