/**
* is $item something that can be used in a foreach() loop?
*
* @param mixed $item
* the item to examine
* @return boolean
* true if the item can be used in a foreach() loop
* false otherwise
*/
private static function calculateResult($item)
{
$itemTypes = AllMatchingTypesList::from($item);
foreach ($itemTypes as $itemType) {
if (isset(self::$acceptableTypes[$itemType])) {
return true;
}
}
return false;
}
/**
* @covers ::fromString
*/
public function testDetectsCallableStrings()
{
// ----------------------------------------------------------------
// setup your test
$data = 'is_string';
$expectedResult = ['Callable', 'String', 'EverythingElse'];
// ----------------------------------------------------------------
// perform the change
$actualResult = AllMatchingTypesList::from($data);
// ----------------------------------------------------------------
// test the results
$this->assertEquals($expectedResult, $actualResult);
}
/**
* use an input item's data type to work out which method we should
* call
*
* this is a faster replacement for the older FirstMethodMatchingType
* value builder
*
* not only is it faster, but the lookup table can also contain protected
* and private methods
*
* @param mixed $item
* the item we want to dispatch
* @param array $typeMethods
* the list of methods that are available
* @return string
* the name of the method to call
*/
public static function using($item, $typeMethods)
{
$types = AllMatchingTypesList::from($item);
foreach ($types as $type) {
if (isset($typeMethods[$type])) {
return $typeMethods[$type];
}
}
return 'nothingMatchesTheInputType';
}
/**
* get a list of which subclasses a VersionNumber uses
*
* our requirement (for this check) is to ensure that programmers can
* subclass version numbers, and their subclasses still pass this check
*
* for example, given this:
*
* class MyVersion extends SemanticVersion { ... }
*
* objects of type MyVersion should be compatible with:
*
* - other objects of type MyVersion
* - any objects of type SemanticVersion
*
* but they cannot be compatible with objects of type VersionNumber
*
* @param VersionNumber $versionNumber
* the object to study
* @return array
* a list of the subclasses that $versionNumber will be
* compatible with
*/
private static function getCompatibleVersionSubclasses(VersionNumber $versionNumber)
{
$retval = [];
$list = AllMatchingTypesList::from($versionNumber);
foreach ($list as $type) {
if ($type === VersionNumber::class) {
return $retval;
}
$retval[$type] = $type;
}
// @codeCoverageIgnoreStart
UnreachableCode::alert();
}
/**
* find the first method on $target that matches $data's data type
*
* @param mixed $data
* the data we want to call $target with
* @param string|object $target
* the target that we want to call
* @param string $methodPrefix
* the prefix at the front of methods on $target
* @return string|null
* the method that suits $data the best
*/
private static function findFirstMatchingMethod($data, $target, $methodPrefix)
{
// no, so we need to build it
$possibleTypes = AllMatchingTypesList::from($data);
$possibleMethods = CallableMethodsList::from($target);
foreach ($possibleTypes as $possibleType) {
$targetMethodName = $methodPrefix . FilterNamespace::fromString($possibleType);
if (isset($possibleMethods[$targetMethodName])) {
// all done
return $targetMethodName;
}
}
// no match
return null;
}
/**
* is $data compatible with $constraint?
*
* @param string $data
* the class name to check
* @param string|object $constraint
* the class or object that $data must be compatible with
* @return boolean
* TRUE if $data is compatible
* FALSE otherwise
*/
public static function checkString($data, $constraint)
{
// defensive programming!
RequireStringy::check($data, E4xx_UnsupportedType::class);
RequireAnyOneOf::check([new IsObject(), new IsStringy()], [$constraint], E4xx_UnsupportedType::class);
$compatibleTypes = AllMatchingTypesList::from($data);
if (is_object($constraint)) {
$constraint = get_class($constraint);
}
// is our constraint in the list of data types that $data can be?
if (in_array($constraint, $compatibleTypes)) {
return true;
}
// if we get here, we have run out of ideas
return false;
}