File: src/eMacros/Runtime/Property/PropertyGet.php

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File: src/eMacros/Runtime/Property/PropertyGet.php
Role: Class source
Content type: text/plain
Description: Class source
Class: eMacros
PHP LISP language interpreter
Author: By
Last change: Fixed: Setting values in private properties in PropertyAssign.
Date: 7 years ago
Size: 3,137 bytes
 

Contents

Class file image Download
<?php
namespace eMacros\Runtime\Property;

use
eMacros\Applicable;
use
eMacros\Scope;
use
eMacros\GenericList;

class
PropertyGet implements Applicable {
   
/**
     * Property to obtain
     * @var mixed
     */
   
public $property;
   
    public function
__construct($property = null) {
       
$this->property = $property;
    }
   
   
/**
     * Obtains a key/property in an array/object
     * Usage: (# 'name' _obj) (# 3 _array) (#name _obj)
     * Returns: Key/property value
     * (non-PHPdoc)
     * @see \eMacros\Applicable::apply()
     */
   
public function apply(Scope $scope, GenericList $arguments) {
       
//get index and value
       
if (is_null($this->property)) {
            if (
count($arguments) == 0) {
                throw new \
BadFunctionCallException("PropertyGet: No parameters found.");
            }
           
           
$key = $arguments[0]->evaluate($scope);
           
            if (
count($arguments) == 1) {
                if (!
array_key_exists(0, $scope->arguments)) {
                    throw new \
BadFunctionCallException("PropertyGet: Expected value of type array/object as second parameter but none found.");
                }
               
               
$value = $scope->arguments[0];
            }
            else {
               
$value = $arguments[1]->evaluate($scope);
            }
        }
        else {
           
$key = $this->property;
           
            if (
count($arguments) == 0) {
                if (!
array_key_exists(0, $scope->arguments)) {
                    throw new \
BadFunctionCallException("PropertyGet: Expected value of type array/object as first parameter but none found.");
                }
               
               
$value = $scope->arguments[0];
            }
            else {
               
$value = $arguments[0]->evaluate($scope);
            }
        }
       
       
//get index/property
       
if (is_array($value)) {
            if (!
array_key_exists($key, $value)) {
                if (
is_int($key)) {
                    throw new \
OutOfBoundsException(sprintf("PropertyGet: Key %s does not exists.", strval($key)));
                }
               
                throw new \
InvalidArgumentException(sprintf("PropertyGet: Key '%s' does not exists.", strval($key)));
            }
               
            return
$value[$key];
        }
        elseif (
$value instanceof \ArrayObject || $value instanceof \ArrayAccess) {
            if (!
$value->offsetExists($key)) {
                if (
is_int($key)) {
                    throw new \
OutOfBoundsException(sprintf("PropertyGet: Key %s does not exists.", strval($key)));
                }
               
                throw new \
InvalidArgumentException(sprintf("PropertyGet: Key '%s' does not exists.", strval($key)));
            }
               
            return
$value[$key];
        }
        elseif (
is_object($value)) {
           
//check property existence
           
if (!property_exists($value, $key)) {
               
//check existence through __isset
               
if (method_exists($value, '__isset') && !$value->__isset($key)) {
                    throw new \
InvalidArgumentException(sprintf("PropertyGet: Property '%s' not found.", strval($key)));
                }
       
               
//try calling __get
               
if (method_exists($value, '__get')) {
                    return
$value->__get($key);
                }
       
                throw new \
InvalidArgumentException(sprintf("PropertyGet: Property '%s' not found.", strval($key)));
            }
               
           
//check property access
           
$rp = new \ReflectionProperty($value, $key);
               
            if (!
$rp->isPublic()) {
               
$rp->setAccessible(true);
            }

            return
$rp->getValue($value);
        }
       
        throw new \
InvalidArgumentException(sprintf("PropertyGet: Expected value of type array/object but %s found instead", gettype($value)));
    }
}
?>

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