三、odataproducer代码改写

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这两周导师一直在美国，所以联系起来很不方便，加上现有的资料很少，所以只能自己摸索，上周确定了思路，导师也说思路是正确的，那么这周就要对代码进行改写。

要改写的代码包括IDataServiceMetaDataProvider，IDataServiceQuery Provider，IDataServiceQueryProvider2，IServiceProvider ，IExpressionProvider，Metadata Mapping这几个部分，每一个部分的功能在上周的报告中已经说过，这里就不在赘述，那么我们一个个来。

 

首先是IDataServiceMetaDataProvider，用来描述实体集和实体的属性及实体间的联系，我们选择SugarCRM中的Contacts实体，首先定义Contacts实体,我们选取

id;   序号
first_name;    名
last_name;    姓
phone_mobile;手机
phone_fax; 传真
primary_address_street;  地址-街道
primary_address_city;地址-城市

primary_address_country;地址-国家
birthdate; 生日
其中id为主键，下面会用到

class Contacts
{//Key Edm.Int32public $id;//Edm.Stringpublic $first_name;//Edm.Stringpublic $last_name;//Edm.Stringpublic $phone_mobile;//Edm.Stringpublic $phone_fax;//Edm.Stringpublic $primary_address_street;//Edm.Stringpublic $primary_address_city;//Edm.Stringpublic $primary_address_country;//Edm.Stringpublic $birthdate;//Edm.String
}

 

然后创建元数据类class CreateSugarCRMMetadata

    public static function create(){$metadata = new ServiceBaseMetadata('SugarCRMEntities', 'SugarCRM');//Register the entity (resource) type 'Contacts'$ContactsEntityType = $metadata->addEntityType(new ReflectionClass('Contacts'), 'Contacts', 'SugarCRM');$metadata->addKeyProperty($ContactsEntityType, 'id', EdmPrimitiveType::INT32);$metadata->addPrimitiveProperty($ContactsEntityType, 'first_name', EdmPrimitiveType::STRING);$metadata->addPrimitiveProperty($ContactsEntityType, 'last_name', EdmPrimitiveType::STRING);$metadata->addPrimitiveProperty($ContactsEntityType, 'primary_address_street', EdmPrimitiveType::STRING);$metadata->addPrimitiveProperty($ContactsEntityType, 'primary_address_city', EdmPrimitiveType::STRING);$metadata->addPrimitiveProperty($ContactsEntityType, 'primary_address_country', EdmPrimitiveType::STRING);$metadata->addPrimitiveProperty($ContactsEntityType, 'phone_mobile', EdmPrimitiveType::STRING);$metadata->addPrimitiveProperty($ContactsEntityType, 'phone_fax', EdmPrimitiveType::STRING);$metadata->addPrimitiveProperty($ContactsEntityType, 'birthdate', EdmPrimitiveType::DATETIME);$ContactsResourceSet = $metadata->addResourceSet('Contacts', $ContactsEntityType);return $metadata;}

首先初始化了metadata对象，继承基类ServiceBaseMetadata，为其添加实体Contacts

然后为实体添加属性，分别为上面我们定义的属性，除了id使用添加主键的方法addKeyProperty，其他调用addPrimitiveProperty函数，最后将实体Contacts加入实体集

 

然后我们看IDataServiceQuery Provider和IDataServiceQuery Provider2这里我们直接用IDataServiceQuery Provider2

首先定义MySQL配置

/** The name of the database for WordPress */
define('DB_NAME', 'SugarCRM');/** MySQL database username */
define('DB_USER', 'root');/** MySQL database password */
define('DB_PASSWORD', '');/** MySQL hostname */
define('DB_HOST', 'localhost');

在构造函数中连接数据库

public function __construct(){$this->_connectionHandle = @mysql_connect(DB_HOST, DB_USER, DB_PASSWORD, true);if ( $this->_connectionHandle ) {} else {             die(print_r(mysql_error(), true));} mysql_select_db(DB_NAME, $this->_connectionHandle);}

IDataServiceQuery Provider2中有5个方法，这里我们只用到两个

第一个是getResourceSet(ResourceSet $resourceSet,$filter=null,$select=null,$orderby=null,$top=null,$skip=null)，这个函数返回经过过滤器筛选的结果

public function getResourceSet(ResourceSet $resourceSet,$filter=null,$select=null,$orderby=null,$top=null,$skip=null){ODataException::createNotImplementedError($this->_message);$resourceSetName =  $resourceSet->getName();if ($resourceSetName !== 'Contacts' ) {die('(SugarCRMQueryProvider) Unknown resource set ' . $resourceSetName);}$returnResult = array();switch ($resourceSetName) {case 'Contacts':$query = "SELECT * FROM `contacts`";if ($filter !== null) {$query .= " AND $filter";}$stmt = mysql_query($query); $returnResult = $this->_serializeContacts($stmt);     break;                   }mysql_free_result($stmt);return $returnResult;}

这里stmt为执行sql语句返回的结果，作为_serializeContacts函数的参数，_serializeContacts参数用于将结果传入一个Contacts对象中

    private function _serializeContacts($record){$contacts = new Contacts();$contacts->id = $record['id'];$contacts->first_name = $record['first_name'];$contacts->last_name = $record['last_name'];$contacts->phone_mobile = $record['phone_mobile'];$contacts->phone_fax = $record['phone_fax'];$contacts->primary_address_street = $record['primary_address_street'];$contacts->primary_address_city = $record['primary_address_city'];$contacts->primary_address_county = $record['primary_address_county'];if (!is_null($record['birthdate'])) {$dateTime = new DateTime($record['birthdate']);$contacts->birthdate = $dateTime->format('Y-m-d\TH:i:s');} else {$contacts->birthdate = null;}return $contacts;}

而getResourceFromResourceSet(ResourceSet $resourceSet, KeyDescriptor $keyDescriptor)则是带有关键字的查询

 public function getResourceFromResourceSet(ResourceSet $resourceSet, KeyDescriptor $keyDescriptor){ODataException::createNotImplementedError($this->_message);$resourceSetName =  $resourceSet->getName();if ($resourceSetName !== 'Contacts' ) {die('(WordPressQueryProvider) Unknown resource set ' . $resourceSetName);}$namedKeyValues = $keyDescriptor->getValidatedNamedValues();$condition = null;foreach ($namedKeyValues as $key => $value) {$condition .= $key . ' = ' . $value[0] . ' and ';}$len = strlen($condition);$condition = substr($condition, 0, $len - 5);$query = "SELECT * FROM [$resourceSetName] WHERE $condition";$stmt = mysql_query($query);if (!mysql_num_rows($stmt)) {return null;}$data = mysql_fetch_assoc($stmt);switch ($resourceSetName) {case 'Contacts':$result = $this->_serializeContacts($data);break;}mysql_free_result($stmt);return $result;}

 

其中$keyDescriptor->getValidatedNamedValues()返回关键字数组，然后用循环取得关键字及对应的值

 

下面改写IDataService，分别改写

public function getService($serviceType){if(($serviceType === 'IDataServiceMetadataProvider') || ($serviceType === 'IDataServiceQueryProvider2') ||($serviceType === 'IDataServiceStreamProvider')) {if (is_null($this->_SugarCRMExpressionProvider)) {$this->_SugarCRMExpressionProvider = new SugarCRMDSExpressionProvider();    			}    	}if ($serviceType === 'IDataServiceMetadataProvider') {if (is_null($this->_SugarCRMMetadata)) {$this->_SugarCRMMetadata = CreateSugarCRMMetadata::create();// $this->_SugarCRMMetadata->mappedDetails = CreateSugarCRMMetadata::mappingInitialize();}return $this->_SugarCRMMetadata;} else if ($serviceType === 'IDataServiceQueryProvider2') {if (is_null($this->_SugarCRMQueryProvider)) {$this->_SugarCRMQueryProvider = new SugarCRMQueryProvider();}return $this->_SugarCRMQueryProvider;} else if ($serviceType === 'IDataServiceStreamProvider') {return new SugarCRMStreamProvider();}return null;}// For testing we overridden the DataService::handleRequest method, one thing is the// private memeber variable DataService::_dataServiceHost is not accessible in this class,// so we are using getHost() below.public function handleRequest(){try {$this->createProviders();$this->getHost()->validateQueryParameters();$requestMethod = $this->getOperationContext()->incomingRequest()->getMethod();if ($requestMethod !== ODataConstants::HTTP_METHOD_GET) {ODataException::createNotImplementedError(Messages::dataServiceOnlyReadSupport($requestMethod));}} catch (\Exception $exception) {throw $exception;}$uriProcessor = null;try {$uriProcessor = UriProcessor::process($this);return $uriProcessor;} catch (\Exception $exception) {throw $exception;}}

这两个函数，将metadata，queryprovider连接起来。

下一步的测试还需要跟导师沟通，下周将进行初步的测试。

 

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