<?php
/*
* Copyright 2011 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* This class defines attributes, valid values, and usage which is generated from
* a given json schema. http://tools.ietf.org/html/draft-zyp-json-schema-03#section-5
*
* @author Chirag Shah <chirags@google.com>
*
*/
class Google_Model {
public function __construct( /* polymorphic */ ) {
if (func_num_args() == 1 && is_array(func_get_arg(0))) {
// Initialize the model with the array's contents.
$array = func_get_arg(0);
$this->mapTypes($array);
}
}
/**
* Initialize this object's properties from an array.
*
* @param array $array Used to seed this object's properties.
* @return void
*/
protected function mapTypes($array) {
foreach ($array as $key => $val) {
$this->$key = $val;
$keyTypeName = "__$key" . 'Type';
$keyDataType = "__$key" . 'DataType';
if ($this->useObjects() && property_exists($this, $keyTypeName)) {
if ($this->isAssociativeArray($val)) {
if (isset($this->$keyDataType) && 'map' == $this->$keyDataType) {
foreach($val as $arrayKey => $arrayItem) {
$val[$arrayKey] = $this->createObjectFromName($keyTypeName, $arrayItem);
}
$this->$key = $val;
} else {
$this->$key = $this->createObjectFromName($keyTypeName, $val);
}
} else if (is_array($val)) {
$arrayObject = array();
foreach ($val as $arrayIndex => $arrayItem) {
$arrayObject[$arrayIndex] = $this->createObjectFromName($keyTypeName, $arrayItem);
}
$this->$key = $arrayObject;
}
}
}
}
/**
* Returns true only if the array is associative.
* @param array $array
* @return bool True if the array is associative.
*/
protected function isAssociativeArray($array) {
if (!is_array($array)) {
return false;
}
$keys = array_keys($array);
foreach($keys as $key) {
if (is_string($key)) {
return true;
}
}
return false;
}
/**
* Given a variable name, discover its type.
*
* @param $name
* @param $item
* @return object The object from the item.
*/
private function createObjectFromName($name, $item) {
$type = $this->$name;
return new $type($item);
}
protected function useObjects() {
global $apiConfig;
return (isset($apiConfig['use_objects']) && $apiConfig['use_objects']);
}
/**
* Verify if $obj is an array.
* @throws Google_Exception Thrown if $obj isn't an array.
* @param array $obj Items that should be validated.
* @param string $type Array items should be of this type.
* @param string $method Method expecting an array as an argument.
*/
public function assertIsArray($obj, $type, $method) {
if ($obj && !is_array($obj)) {
throw new Google_Exception("Incorrect parameter type passed to $method(), expected an"
. " array containing items of type $type.");
}
}
}
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