PhutilAggregateException.php
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	<?php

	/**
	* Exception that aggregates other exceptions into a single exception. For
	* example, if you have several objects which can perform a task and just want
	* at least one of them to succeed, you can do something like this:
	*
	* $exceptions = array();
	* $success = false;
	* foreach ($engines as $engine) {
	* try {
	* $engine->doSomething();
	* $success = true;
	* break;
	* } catch (Exception $ex) {
	* $exceptions[get_class($engine)] = $ex;
	* }
	* }
	*
	* if (!$success) {
	* throw new PhutilAggregateException("All engines failed:", $exceptions);
	* }
	*
	* @concrete-extensible
	*/
	class PhutilAggregateException extends Exception {

	private $exceptions = array();

	public function __construct($message, array $other_exceptions) {
	// We don't call assert_instances_of($other_exceptions, 'Exception') to not
	// throw another exception in this exception.

	$this->exceptions = $other_exceptions;

	$full_message = array();
	$full_message[] = $message;
	foreach ($other_exceptions as $key => $exception) {
	$ex_message =
	(is_string($key) ? $key.': ' : '').
	get_class($exception).': '.
	$exception->getMessage();
	$ex_message = ' - '.str_replace("\n", "\n ", $ex_message);

	$full_message[] = $ex_message;
	}

	parent::__construct(implode("\n", $full_message), count($other_exceptions));
	}

	public function getExceptions() {
	return $this->exceptions;
	}

	}