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   <h1 class="title-container" >
     Using PdxInstanceFactory to Create PdxInstances
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 <p>You can use the <code>PdxInstanceFactory</code> API to create a <code>PdxInstance</code> from raw data when the domain class is not available on the server.</p>

 <p>Creating a <code>PdxInstance</code> can be particularly useful when you need an instance of a domain class for plug-in code such as a function or a loader. If you have raw data for the domain object (the class name and each field&rsquo;s type and data), then you can explicitly create a <code>PdxInstance</code>. The <code>PdxInstanceFactory</code> API is very similar to the <code>PdxWriter</code> API except that after writing each field, you need to call the create method which returns the created <code>PdxInstance</code>.</p>

 <h2 id="pdxinstance-example">PdxInstance Example</h2>

 <p>The following is a code example of creating a <code>PdxInstance</code>.</p>
 <pre class="highlight plaintext"><code>class Person
 {
 private:
   char* m_name;
   int m_id;
   int m_age;

 public:
   Person() { }

   Person(char* name, int id, int age)
   {
     m_name = name;
     m_id = id;
     m_age = age;
   }

   char* getName() const
   {
     return m_name;
   }
   int getID()
   {
     return m_id;
   }
   int getAge()
   {
     return m_age;
   }
 };

 int main(int argc, char ** argv)
 {
   try
   {
     // Create a Cache.
     CacheFactoryPtr cacheFactory = CacheFactory::createCacheFactory();

     CachePtr cachePtr = cacheFactory-&gt;set("cache-xml-file",
                 "XMLs/clientPdxInstance.xml")-&gt;create();

     LOGINFO("Created the Geode Cache");

     // Get the example Region from the Cache which is declared in the
     // Cache XML file.
     RegionPtr regionPtr = cachePtr-&gt;getRegion("Person");

     LOGINFO("Obtained the Region from the Cache.");

     Person* p = new Person("Jack", 7, 21);

     //PdxInstanceFactory for Person class
     PdxInstanceFactoryPtr pif = cachePtr-&gt;createPdxInstanceFactory("Person");
     LOGINFO("Created PdxInstanceFactory for Person class");

     pif-&gt;writeString("m_name", p-&gt;getName());
     pif-&gt;writeInt("m_id", p-&gt;getID());
     pif-&gt;markIdentityField("m_id");
     pif-&gt;writeInt("m_age", p-&gt;getAge());

     PdxInstancePtr pdxInstance = pif-&gt;create();

     LOGINFO("Created PdxInstance for Person class");

     regionPtr-&gt;put("Key1", pdxInstance);

     LOGINFO("Populated PdxInstance Object");

     PdxInstancePtr retPdxInstance = regionPtr-&gt;get("Key1");

     LOGINFO("Got PdxInstance Object");

     int id = 0;
     retPdxInstance-&gt;getField("m_id", id);

     int age = 0;
     retPdxInstance-&gt;getField("m_age", age);

     char* name = NULL;
     retPdxInstance-&gt;getField("m_name", &amp;name);

     if (id == p-&gt;getID()&amp;&amp; age == p-&gt;getAge() &amp;&amp; strcmp(name, p-&gt;getName()) == 0
       &amp;&amp; retPdxInstance-&gt;isIdentityField("m_id") == true)
       LOGINFO("PdxInstance returns all fields value expected");
     else
       LOGINFO("PdxInstance doesn't returns all fields value expected");

     delete p;

     // Close the Cache.
     cachePtr-&gt;close();

     LOGINFO("Closed the Cache");

   }
   // An exception should not occur
   catch(const Exception &amp; geodeExcp)
   {
     LOGERROR("PdxInstance Exception: %s", geodeExcp.getMessage());
   }
 }
 </code></pre>


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	<h1 class="title-container" >
	Using PdxInstanceFactory to Create PdxInstances
	</h1>

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	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.
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	<p>You can use the <code>PdxInstanceFactory</code> API to create a <code>PdxInstance</code> from raw data when the domain class is not available on the server.</p>

	<p>Creating a <code>PdxInstance</code> can be particularly useful when you need an instance of a domain class for plug-in code such as a function or a loader. If you have raw data for the domain object (the class name and each field’s type and data), then you can explicitly create a <code>PdxInstance</code>. The <code>PdxInstanceFactory</code> API is very similar to the <code>PdxWriter</code> API except that after writing each field, you need to call the create method which returns the created <code>PdxInstance</code>.</p>

	<h2 id="pdxinstance-example">PdxInstance Example</h2>

	<p>The following is a code example of creating a <code>PdxInstance</code>.</p>
	<pre class="highlight plaintext"><code>class Person
	{
	private:
	char* m_name;
	int m_id;
	int m_age;

	public:
	Person() { }

	Person(char* name, int id, int age)
	{
	m_name = name;
	m_id = id;
	m_age = age;
	}

	char* getName() const
	{
	return m_name;
	}
	int getID()
	{
	return m_id;
	}
	int getAge()
	{
	return m_age;
	}
	};

	int main(int argc, char ** argv)
	{
	try
	{
	// Create a Cache.
	CacheFactoryPtr cacheFactory = CacheFactory::createCacheFactory();

	CachePtr cachePtr = cacheFactory->set("cache-xml-file",
	"XMLs/clientPdxInstance.xml")->create();

	LOGINFO("Created the Geode Cache");

	// Get the example Region from the Cache which is declared in the
	// Cache XML file.
	RegionPtr regionPtr = cachePtr->getRegion("Person");

	LOGINFO("Obtained the Region from the Cache.");

	Person* p = new Person("Jack", 7, 21);

	//PdxInstanceFactory for Person class
	PdxInstanceFactoryPtr pif = cachePtr->createPdxInstanceFactory("Person");
	LOGINFO("Created PdxInstanceFactory for Person class");

	pif->writeString("m_name", p->getName());
	pif->writeInt("m_id", p->getID());
	pif->markIdentityField("m_id");
	pif->writeInt("m_age", p->getAge());

	PdxInstancePtr pdxInstance = pif->create();

	LOGINFO("Created PdxInstance for Person class");

	regionPtr->put("Key1", pdxInstance);

	LOGINFO("Populated PdxInstance Object");

	PdxInstancePtr retPdxInstance = regionPtr->get("Key1");

	LOGINFO("Got PdxInstance Object");

	int id = 0;
	retPdxInstance->getField("m_id", id);

	int age = 0;
	retPdxInstance->getField("m_age", age);

	char* name = NULL;
	retPdxInstance->getField("m_name", &name);

	if (id == p->getID()&& age == p->getAge() && strcmp(name, p->getName()) == 0
	&& retPdxInstance->isIdentityField("m_id") == true)
	LOGINFO("PdxInstance returns all fields value expected");
	else
	LOGINFO("PdxInstance doesn't returns all fields value expected");

	delete p;

	// Close the Cache.
	cachePtr->close();

	LOGINFO("Closed the Cache");

	}
	// An exception should not occur
	catch(const Exception & geodeExcp)
	{
	LOGERROR("PdxInstance Exception: %s", geodeExcp.getMessage());
	}
	}
	</code></pre>



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