8000 [VarDumper] Add filters to casters by nicolas-grekas · Pull Request #14058 · symfony/symfony · GitHub
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[VarDumper] Add filters to casters #14058

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Merged
merged 1 commit into from
Mar 30, 2015
Merged

[VarDumper] Add filters to casters #14058

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81 changes: 81 additions & 0 deletions src/Symfony/Component/VarDumper/Caster/Caster.php
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Original file line number Diff line number Diff line change
@@ -0,0 +1,81 @@
<?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\VarDumper\Caster;

/**
* Helper for filtering out properties in casters.
*
* @author Nicolas Grekas <p@tchwork.com>
*/
class Caster
{
const EXCLUDE_VERBOSE = 1;
const EXCLUDE_VIRTUAL = 2;
const EXCLUDE_DYNAMIC = 4;
const EXCLUDE_PUBLIC = 8;
const EXCLUDE_PROTECTED = 16;
const EXCLUDE_PRIVATE = 32;
const EXCLUDE_NULL = 64;
const EXCLUDE_EMPTY = 128;
const EXCLUDE_NOT_IMPORTANT = 256;
const EXCLUDE_STRICT = 512;
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You should add some phpdoc to explain the meaning of some of these flags. Most of them are understandable from their name, but EXCLUDE_NOT_IMPORTANT, EXCLUDE_VERBOSE and EXCLUDE_STRICT might deserve some explanations

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Comments added in the method doc block. Good enough for you?


/**
* Filters out the specified properties.
*
* By default, a single match in the $filter bit field filters properties out, following an "or" logic.
* When EXCLUDE_STRICT is set, an "and" logic is applied: all bits must match for a property to be removed.
*
* @param array $a The array containing the properties to filter.
* @param int $filter A bit field of Caster::EXCLUDE_* constants specifying which properties to filter out.
* @param string[] $listedProperties List of properties to exclude when Caster::EXCLUDE_VERBOSE is set, and to preserve when Caster::EXCLUDE_NOT_IMPORTANT is set.
*
* @return array The filtered array
*/
public static function filter(array $a, $filter, array $listedProperties = array())
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is this method actually used anywhere ?

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Not in Symfony but I hope to use it in PsySH bobthecow/psysh#184

{
foreach ($a as $k => $v) {
$type = self::EXCLUDE_STRICT & $filter;

if (null === $v) {
$type |= self::EXCLUDE_NULL & $filter;
}
if (empty($v)) {
$type |= self::EXCLUDE_EMPTY & $filter;
}
if ((self::EXCLUDE_NOT_IMPORTANT & $filter) && !in_array($k, $listedProperties, true)) {
$type |= self::EXCLUDE_NOT_IMPORTANT;
}
if ((self::EXCLUDE_VERBOSE & $filter) && in_array($k, $listedProperties, true)) {
$type |= self::EXCLUDE_VERBOSE;
}

if (!isset($k[1]) || "\0" !== $k[0]) {
$type |= self::EXCLUDE_PUBLIC & $filter;
} elseif ('~' === $k[1]) {
$type |= self::EXCLUDE_VIRTUAL & $filter;
} elseif ('+' === $k[1]) {
$type |= self::EXCLUDE_DYNAMIC & $filter;
} elseif ('*' === $k[1]) {
$type |= self::EXCLUDE_PROTECTED & $filter;
} else {
$type |= self::EXCLUDE_PRIVATE & $filter;
}

if ((self::EXCLUDE_STRICT & $filter) ? $type === $filter : $type) {
unset($a[$k]);
}
}

return $a;
}
}
10 changes: 6 additions & 4 deletions src/Symfony/Component/VarDumper/Caster/ExceptionCaster.php
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Expand Up @@ -40,15 +40,17 @@ class ExceptionCaster
E_STRICT => 'E_STRICT',
);

public static function castException(\Exception $e, array $a, Stub $stub, $isNested)
public static function castException(\Exception $e, array $a, Stub $stub, $isNested, $filter = 0)
{
$trace = $a["\0Exception\0trace"];
unset($a["\0Exception\0trace"]); // Ensures the trace is always last

static::filterTrace($trace, static::$traceArgs);
if (!($filter & Caster::EXCLUDE_VERBOSE)) {
static::filterTrace($trace, static::$traceArgs);

if (null !== $trace) {
$a["\0Exception\0trace"] = $trace;
if (null !== $trace) {
$a["\0Exception\0trace"] = $trace;
}
}
if (empty($a["\0Exception\0previous"])) {
unset($a["\0Exception\0previous"]);
Expand Down
13 changes: 10 additions & 3 deletions src/Symfony/Component/VarDumper/Cloner/AbstractCloner.php
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Expand Up @@ -96,6 +96,7 @@ abstract class AbstractCloner implements ClonerInterface
private $casters = array();
private $prevErrorHandler;
private $classInfo = array();
private $filter = 0;

/**
* @param callable[]|null $casters A map of casters.
Expand Down Expand Up @@ -149,10 +150,16 @@ public function setMaxString($maxString)
}

/**
* {@inheritdoc}
* Clones a PHP variable.
*
* @param mixed $var Any PHP variable.
* @param int $filter A bit field of Caster::EXCLUDE_* constants.
*
* @return Data The cloned variable represented by a Data object.
*/
public function cloneVar($var)
public function cloneVar($var, $filter = 0)
{
$this->filter = $filter;
$this->prevErrorHandler = set_error_handler(array($this, 'handleError'));
try {
if (!function_exists('iconv')) {
Expand Down Expand Up @@ -270,7 +277,7 @@ protected function castResource(Stub $stub, $isNested)
private function callCaster($callback, $obj, $a, $stub, $isNested)
{
try {
$cast = call_user_func($callback, $obj, $a, $stub, $isNested);
$cast = call_user_func($callback, $obj, $a, $stub, $isNested, $this->filter);

if (is_array($cast)) {
$a = $cast;
Expand Down
147 changes: 147 additions & 0 deletions src/Symfony/Component/VarDumper/Tests/Caster/CasterTest.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\VarDumper\Tests\Caster;

use Symfony\Component\VarDumper\Caster\Caster;

/**
* @author Nicolas Grekas <p@tchwork.com>
*/
class CasterTest extends \PHPUnit_Framework_TestCase
{
private $referenceArray = array(
'null' => null,
'empty' => false,
'public' => 'pub',
"\0~\0virtual" => 'virt',
"\0+\0dynamic" => 'dyn',
"\0*\0protected" => 'prot',
"\0Foo\0private" => 'priv',
);

/** @dataProvider provideFilter */
public function testFilter($filter, $expectedDiff, $listedProperties = null)
{
if (null === $listedProperties) {
$filteredArray = Caster::filter($this->referenceArray, $filter);
} else {
$filteredArray = Caster::filter($this->referenceArray, $filter, $listedProperties);
}

$this->assertSame($expectedDiff, array_diff_assoc($this->referenceArray, $filteredArray));
}

public function provideFilter()
{
return array(
array(
0,
array(),
),
array(
Caster::EXCLUDE_PUBLIC,
array(
'null' => null,
'empty' => false,
'public' => 'pub',
),
),
array(
Caster::EXCLUDE_NULL,
array(
'null' => null,
),
),
array(
Caster::EXCLUDE_EMPTY,
array(
'null' => null,
'empty' => false,
),
),
array(
Caster::EXCLUDE_VIRTUAL,
array(
"\0~\0virtual" => 'virt',
),
),
array(
Caster::EXCLUDE_DYNAMIC,
array(
"\0+\0dynamic" => 'dyn',
),
),
array(
Caster::EXCLUDE_PROTECTED,
array(
"\0*\0protected" => 'prot',
),
),
array(
Caster::EXCLUDE_PRIVATE,
array(
"\0Foo\0private" => 'priv',
),
),
array(
Caster::EXCLUDE_VERBOSE,
array(
'public' => 'pub',
"\0*\0protected" => 'prot',
),
array('public', "\0*\0protected"),
),
array(
Caster::EXCLUDE_NOT_IMPORTANT,
array(
'null' => null,
'empty' => false,
"\0~\0virtual" => 'virt',
"\0+\0dynamic" => 'dyn',
"\0Foo\0private" => 'priv',
),
array('public', "\0*\0protected"),
),
array(
Caster::EXCLUDE_VIRTUAL | Caster::EXCLUDE_DYNAMIC,
array(
"\0~\0virtual" => 'virt',
"\0+\0dynamic" => 'dyn',
),
),
array(
Caster::EXCLUDE_NOT_IMPORTANT | Caster::EXCLUDE_VERBOSE,
$this->referenceArray,
array('public', "\0*\0protected"),
),
array(
Caster::EXCLUDE_NOT_IMPORTANT | Caster::EXCLUDE_EMPTY,
array(
'null' => null,
'empty' => false,
"\0~\0virtual" => 'virt',
"\0+\0dynamic" => 'dyn',
"\0*\0protected" => 'prot',
"\0Foo\0private" => 'priv',
),
array('public', 'empty'),
),
array(
Caster::EXCLUDE_VERBOSE | Caster::EXCLUDE_EMPTY | Caster::EXCLUDE_STRICT,
array(
'empty' => false,
),
array('public', 'empty'),
),
);
}
}
0