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   <h1 class="title-container" >
     Using C++ Enum Type with PDX Serialization
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 <p>Because there is no &ldquo;object&rdquo; base type in C++, enums cannot be directly passed as parameters to the <code>writeObject</code> and <code>readObject</code> API.</p>

 <p>To use the C++ enum type with PDX serialization, you have to wrap the <code>enum</code> in the <code>CacheableEnum</code> class type by specifying classname, enumname and ordinal.</p>
 <pre class="highlight plaintext"><code>enum enumQuerytest { id1, id2, id3 };
  class TESTOBJECT_EXPORT PdxEnumTestClass :public PdxSerializable
   {
   private:
     int m_id;
     CacheableEnumPtr m_enumid;

   public:
     int getID(){
       return m_id;
     }

     CacheableEnumPtr getEnumID() {
       return m_enumid;
     }

     PdxEnumTestClass(int id)
     {
       m_id = id;
       switch (m_id) {
         case 0:
           m_enumid = CacheableEnum::create("enumQuerytest", "id1", id1);
           break;
         case 1:
           m_enumid = CacheableEnum::create("enumQuerytest", "id2", id2);
           break;
         case 2:
           m_enumid = CacheableEnum::create("enumQuerytest", "id3", id3);
           break;
         default:
           m_enumid = CacheableEnum::create("enumQuerytest", "id1", id1);
           break;
       }
     }

     PdxEnumTestClass() { }

     void toData(PdxWriterPtr pw) {
       pw-&gt;writeInt("m_id", m_id);
       pw-&gt;writeObject("m_enumid", m_enumid);
     }

     void fromData(PdxReaderPtr pr) {
       m_id = pr-&gt;readInt("m_id");
       m_enumid = pr-&gt;readObject("m_enumid");
     }

     CacheableStringPtr toString() const {
       return CacheableString::create("PdxEnumTestClass");
     }

     char* GetClassName() const {
       return "com.example.PdxEnumTestClass";
     }

     static PdxSerializable* createDeserializable() {
       return new PdxEnumTestClass();
     }
   };
 </code></pre>

 <h2 id="how-puts-and-queries-work-on-enums"><a id="concept_F38FDBC327204B4EB1E0BC74B4C95409__section_3491F76DB8C0464D89418B89372BBAEA" class="no-quick-link"></a>How Puts and Queries Work on Enums</h2>

 <p>The following code sample demonstrates how put and query operations work when using the C++ enum Type with PDX serialization:</p>
 <pre class="highlight plaintext"><code>//Creating objects of type PdxEnumTestClass
 PdxEnumTestClassPtr pdxobj1(new PdxEnumTestClass(0));
 PdxEnumTestClassPtr pdxobj2(new PdxEnumTestClass(1));
 PdxEnumTestClassPtr pdxobj3(new PdxEnumTestClass(2));

 RegionPtr rptr = getHelper()-&gt;getRegion( "DistRegionAck" );

 //PUT Operations
 rptr-&gt;put( CacheableInt32::create(0), pdxobj1 );
 LOG( "pdxPut 1 completed " );

 rptr-&gt;put( CacheableInt32::create(1), pdxobj2 );
 LOG( "pdxPut 2 completed " );

 rptr-&gt;put( CacheableInt32::create(2), pdxobj3 );
 LOG( "pdxPut 3 completed " );


 //Query
 try {
     Serializable::registerPdxType(PdxEnumTestClass::createDeserializable);
     LOG("PdxEnumTestClass Registered Successfully....");
 } catch (geode::IllegalStateException&amp;/* ex*/) {
     LOG("PdxEnumTestClass IllegalStateException");
 }

 RegionPtr rptr = getHelper()-&gt;getRegion( "DistRegionAck" );
 SelectResultsPtr results = rptr-&gt;query("m_enumid.name = 'id2'");
 ASSERT(results-&gt;size()== 1 , "query result should have one item");
 ResultSetPtr rsptr = dynCast&lt;ResultSetPtr&gt;(results);
 SelectResultsIterator iter = rsptr-&gt;getIterator();
 while (iter.moveNext()) {
     PdxEnumTestClassPtr re = dynCast&lt;PdxEnumTestClassPtr&gt;(iter.current());
     ASSERT(re-&gt;getID()== 1 , "query should have returned id 1");
 }
 </code></pre>


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	<h1 class="title-container" >
	Using C++ Enum Type with PDX Serialization
	</h1>

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	<p>Because there is no “object” base type in C++, enums cannot be directly passed as parameters to the <code>writeObject</code> and <code>readObject</code> API.</p>

	<p>To use the C++ enum type with PDX serialization, you have to wrap the <code>enum</code> in the <code>CacheableEnum</code> class type by specifying classname, enumname and ordinal.</p>
	<pre class="highlight plaintext"><code>enum enumQuerytest { id1, id2, id3 };
	class TESTOBJECT_EXPORT PdxEnumTestClass :public PdxSerializable
	{
	private:
	int m_id;
	CacheableEnumPtr m_enumid;

	public:
	int getID(){
	return m_id;
	}

	CacheableEnumPtr getEnumID() {
	return m_enumid;
	}

	PdxEnumTestClass(int id)
	{
	m_id = id;
	switch (m_id) {
	case 0:
	m_enumid = CacheableEnum::create("enumQuerytest", "id1", id1);
	break;
	case 1:
	m_enumid = CacheableEnum::create("enumQuerytest", "id2", id2);
	break;
	case 2:
	m_enumid = CacheableEnum::create("enumQuerytest", "id3", id3);
	break;
	default:
	m_enumid = CacheableEnum::create("enumQuerytest", "id1", id1);
	break;
	}
	}

	PdxEnumTestClass() { }

	void toData(PdxWriterPtr pw) {
	pw->writeInt("m_id", m_id);
	pw->writeObject("m_enumid", m_enumid);
	}

	void fromData(PdxReaderPtr pr) {
	m_id = pr->readInt("m_id");
	m_enumid = pr->readObject("m_enumid");
	}

	CacheableStringPtr toString() const {
	return CacheableString::create("PdxEnumTestClass");
	}

	char* GetClassName() const {
	return "com.example.PdxEnumTestClass";
	}

	static PdxSerializable* createDeserializable() {
	return new PdxEnumTestClass();
	}
	};
	</code></pre>

	<h2 id="how-puts-and-queries-work-on-enums"><a id="concept_F38FDBC327204B4EB1E0BC74B4C95409__section_3491F76DB8C0464D89418B89372BBAEA" class="no-quick-link"></a>How Puts and Queries Work on Enums</h2>

	<p>The following code sample demonstrates how put and query operations work when using the C++ enum Type with PDX serialization:</p>
	<pre class="highlight plaintext"><code>//Creating objects of type PdxEnumTestClass
	PdxEnumTestClassPtr pdxobj1(new PdxEnumTestClass(0));
	PdxEnumTestClassPtr pdxobj2(new PdxEnumTestClass(1));
	PdxEnumTestClassPtr pdxobj3(new PdxEnumTestClass(2));

	RegionPtr rptr = getHelper()->getRegion( "DistRegionAck" );

	//PUT Operations
	rptr->put( CacheableInt32::create(0), pdxobj1 );
	LOG( "pdxPut 1 completed " );

	rptr->put( CacheableInt32::create(1), pdxobj2 );
	LOG( "pdxPut 2 completed " );

	rptr->put( CacheableInt32::create(2), pdxobj3 );
	LOG( "pdxPut 3 completed " );


	//Query
	try {
	Serializable::registerPdxType(PdxEnumTestClass::createDeserializable);
	LOG("PdxEnumTestClass Registered Successfully....");
	} catch (geode::IllegalStateException&/* ex*/) {
	LOG("PdxEnumTestClass IllegalStateException");
	}

	RegionPtr rptr = getHelper()->getRegion( "DistRegionAck" );
	SelectResultsPtr results = rptr->query("m_enumid.name = 'id2'");
	ASSERT(results->size()== 1 , "query result should have one item");
	ResultSetPtr rsptr = dynCast<ResultSetPtr>(results);
	SelectResultsIterator iter = rsptr->getIterator();
	while (iter.moveNext()) {
	PdxEnumTestClassPtr re = dynCast<PdxEnumTestClassPtr>(iter.current());
	ASSERT(re->getID()== 1 , "query should have returned id 1");
	}
	</code></pre>



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