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VMware Tanzu GemFire Native C++ Reference 10.2.7
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PdxInstance provides run time access to the fields of a PDX without deserializing the PDX. More...
#include <PdxInstance.hpp>
Inherits apache::geode::client::PdxSerializable.
Inherited by apache::geode::client::WritablePdxInstance.
Public Member Functions | |
| virtual std::shared_ptr< WritablePdxInstance > | createWriter ()=0 |
Creates and returns a WritablePdxInstance whose initial values are those of this PdxInstance. More... | |
| virtual void | fromData (PdxReader &input) override=0 |
| Deserialize this object. More... | |
| virtual std::vector< bool > | getBooleanArrayField (const std::string &fieldname) const =0 |
| Reads the named field and sets its value in bool array type out param. More... | |
| virtual bool | getBooleanField (const std::string &fieldname) const =0 |
| Reads the named field and sets its value in bool type out param. More... | |
| virtual std::vector< int8_t > | getByteArrayField (const std::string &fieldname) const =0 |
| Reads the named field and sets its value in signed char array type out param. More... | |
| virtual int8_t | getByteField (const std::string &fieldname) const =0 |
| Reads the named field and sets its value in signed char type out param. More... | |
| virtual std::shared_ptr< CacheableDate > | getCacheableDateField (const std::string &fieldname) const =0 |
| Reads the named field and sets its value in std::shared_ptr<CacheableDate> type out param. More... | |
| virtual std::shared_ptr< Cacheable > | getCacheableField (const std::string &fieldname) const =0 |
| Reads the named field and sets its value in std::shared_ptr<Cacheable> type out param. More... | |
| virtual std::shared_ptr< CacheableObjectArray > | getCacheableObjectArrayField (const std::string &fieldname) const =0 |
| Reads the named field and sets its value in std::shared_ptr<CacheableObjectArray> type out param. More... | |
| virtual std::vector< char16_t > | getCharArrayField (const std::string &fieldName) const =0 |
| Reads the named field and sets its value in char array type out param. More... | |
| virtual char16_t | getCharField (const std::string &fieldName) const =0 |
| Reads the named field and sets its value in char type out param. More... | |
| virtual const std::string & | getClassName () const override=0 |
| Return the full name of the class that this pdx instance represents. More... | |
| virtual std::vector< double > | getDoubleArrayField (const std::string &fieldname) const =0 |
| Reads the named field and sets its value in double array type out param. More... | |
| virtual double | getDoubleField (const std::string &fieldname) const =0 |
| Reads the named field and sets its value in double type out param. More... | |
| virtual void | getField (const std::string &fieldName, int8_t ***value, int32_t &arrayLength, int32_t *&elementLength) const =0 |
| Reads the named field and sets its value in array of byte arrays type out param. More... | |
| virtual std::shared_ptr< CacheableStringArray > | getFieldNames ()=0 |
| Return an unmodifiable list of the field names on this PdxInstance. More... | |
| virtual PdxFieldTypes | getFieldType (const std::string &fieldname) const =0 |
| Return the type. More... | |
| virtual std::vector< float > | getFloatArrayField (const std::string &fieldname) const =0 |
| Reads the named field and sets its value in float array type out param. More... | |
| virtual float | getFloatField (const std::string &fieldname) const =0 |
| Reads the named field and sets its value in float type out param. More... | |
| virtual std::vector< int32_t > | getIntArrayField (const std::string &fieldname) const =0 |
| Reads the named field and sets its value in int32_t array type out param. More... | |
| virtual int32_t | getIntField (const std::string &fieldname) const =0 |
| Reads the named field and sets its value in int32_t type out param. More... | |
| virtual std::vector< int64_t > | getLongArrayField (const std::string &fieldname) const =0 |
| Reads the named field and sets its value in int64_t array type out param. More... | |
| virtual int64_t | getLongField (const std::string &fieldname) const =0 |
| Reads the named field and sets its value in int64_t type out param. More... | |
| virtual std::shared_ptr< PdxSerializable > | getObject ()=0 |
| Deserializes and returns the domain object that this instance represents. More... | |
| virtual std::vector< int16_t > | getShortArrayField (const std::string &fieldname) const =0 |
| Reads the named field and sets its value in int16_t array type out param. More... | |
| virtual int16_t | getShortField (const std::string &fieldname) const =0 |
| Reads the named field and sets its value in int16_t type out param. More... | |
| virtual std::vector< std::string > | getStringArrayField (const std::string &fieldname) const =0 |
| Reads the named field as a string array. More... | |
| virtual std::string | getStringField (const std::string &fieldname) const =0 |
| Reads the named field and sets its value in std::string type out param. More... | |
| virtual bool | hasField (const std::string &fieldname)=0 |
| Checks if the named field exists and returns the result. More... | |
| virtual int32_t | hashcode () const override=0 |
| Generates a hashcode based on the identity fields of this PdxInstance. More... | |
| virtual bool | isIdentityField (const std::string &fieldname)=0 |
Checks if the named field was PdxWriter#markIdentityFieldmarked as an identity field. More... | |
| virtual size_t | objectSize () const override=0 |
| virtual bool | operator== (const CacheableKey &other) const override=0 |
| Returns true if the given CacheableKey derived object is equals to this instance. More... | |
| virtual void | toData (PdxWriter &output) const override=0 |
| serialize this object in geode PDX format. More... | |
| virtual std::string | toString () const override=0 |
| Prints out all of the identity fields of this PdxInstance. More... | |
| ~PdxInstance () override=default | |
| destructor More... | |
Static Public Member Functions | |
| template<class _T > | |
| static std::shared_ptr< CacheableKey > | create (_T value) |
| Factory method that creates the key type that matches the type of value. More... | |
| template<class _T > | |
| static std::shared_ptr< Serializable > | create (_T value) |
| Factory method that creates the Serializable object that matches the type of value. More... | |
Protected Member Functions | |
| PdxInstance () | |
| constructors More... | |
PdxInstance provides run time access to the fields of a PDX without deserializing the PDX.
Preventing deserialization saves time and memory. The PdxInstance implementation is a lightweight wrapper that simply refers to the raw bytes of the PDX that are kept in the cache. Applications can choose to access PdxInstances instead of C++ objects by configuring the Cache to prefer PDX instances during deserialization. This can be done in cache.xml by setting the attribute read-serialized to true on the pdx element, or it can be done programmatically using the setPdxReadSerialized method. Once this preference is configured, then any time deserialization of a PDX is done it will deserialize into a PdxInstance. PdxInstances are immutable. If you want to change one call createWriter.
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overridedefault |
destructor
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inlineprotected |
constructors
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staticinherited |
Factory method that creates the key type that matches the type of value.
For user defined derivations of CacheableKey, the method apache::geode::client::CacheableKey::create may be overloaded.
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staticinherited |
Factory method that creates the Serializable object that matches the type of value.
For user defined derivations of Serializable, the method apache::geode::client::Serializable::create may be overloaded.
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pure virtual |
Creates and returns a WritablePdxInstance whose initial values are those of this PdxInstance.
This call returns a copy of the current field values so modifications made to the returned value will not modify this PdxInstance.
WritablePdxInstance
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overridepure virtual |
Deserialize this object.
This is an internal method.
| input | to deserialize the PDX object |
Implements apache::geode::client::PdxSerializable.
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pure virtual |
Reads the named field and sets its value in bool array type out param.
bool* type corresponds to the Java boolean[] type.
| fieldname | name of the field to read |
| IllegalStateException | if PdxInstance doesn't have the named field. |
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pure virtual |
Reads the named field and sets its value in bool type out param.
bool type corresponds to the Java boolean type.
| fieldname | name of the field to read |
| IllegalStateException | if PdxInstance doesn't have the named field. |
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pure virtual |
Reads the named field and sets its value in signed char array type out param.
int8_t* type corresponds to the Java byte[] type.
| fieldname | name of the field to read |
| IllegalStateException | if PdxInstance doesn't have the named field. |
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pure virtual |
Reads the named field and sets its value in signed char type out param.
signed char type corresponds to the Java byte type.
| fieldname | name of the field to read |
| IllegalStateException | if PdxInstance doesn't have the named field. |
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pure virtual |
Reads the named field and sets its value in std::shared_ptr<CacheableDate> type out param.
std::shared_ptr<CacheableDate> type is corresponding to java Java.util.date type.
| fieldname | name of the field to read std::shared_ptr<CacheableDate> type. |
| IllegalStateException | if PdxInstance doesn't have the named field. |
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pure virtual |
Reads the named field and sets its value in std::shared_ptr<Cacheable> type out param.
std::shared_ptr<Cacheable> type corresponds to the Java object type.
| fieldname | name of the field to read |
| IllegalStateException | if PdxInstance doesn't have the named field. For deserialization C++ Native Client requires the domain class to be registered. |
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pure virtual |
Reads the named field and sets its value in std::shared_ptr<CacheableObjectArray> type out param.
For deserialization C++ Native Client requires the domain class to be registered. std::shared_ptr<CacheableObjectArray> type corresponds to the Java Object[] type.
| fieldname | name of the field to read. std::shared_ptr<CacheableObjectArray> type. |
| IllegalStateException | if PdxInstance doesn't have the named field. |
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pure virtual |
Reads the named field and sets its value in char array type out param.
char16_t* type corresponds to the Java char[] type.
| fieldName | name of the field to read |
| IllegalStateException | if PdxInstance doesn't have the named field. |
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pure virtual |
Reads the named field and sets its value in char type out param.
char type corresponds to the Java char type.
| IllegalStateException | if PdxInstance doesn't have the named field. |
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overridepure virtual |
Return the full name of the class that this pdx instance represents.
| IllegalStateException | if the PdxInstance typeid is not defined yet, to get classname or if PdxType is not defined for PdxInstance. |
Implements apache::geode::client::PdxSerializable.
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pure virtual |
Reads the named field and sets its value in double array type out param.
double* type corresponds to the Java double[] type.
| fieldname | name of the field to read |
| IllegalStateException | if PdxInstance doesn't have the named field. |
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pure virtual |
Reads the named field and sets its value in double type out param.
double type corresponds to the Java double type.
| fieldname | name of the field to read |
| IllegalStateException | if PdxInstance doesn't have the named field. |
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pure virtual |
Reads the named field and sets its value in array of byte arrays type out param.
int8_t** type corresponds to the Java byte[][] type.
| fieldName | name of the field to read. |
| value | value of the field to be set with array of byte arrays type. |
| arrayLength | arrayLength is set to the number of byte arrays. |
| elementLength | elementLength is set to individual byte array lengths. |
| IllegalStateException | if PdxInstance doesn't have the named field. |
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pure virtual |
Return an unmodifiable list of the field names on this PdxInstance.
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pure virtual |
Return the type.
| IllegalStateException | if the PdxInstance typeid is not defined yet, to get classname or if PdxType is not defined for PdxInstance. |
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pure virtual |
Reads the named field and sets its value in float array type out param.
float* type corresponds to the Java float[] type.
| fieldname | name of the field to read |
| IllegalStateException | if PdxInstance doesn't have the named field. |
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pure virtual |
Reads the named field and sets its value in float type out param.
float type corresponds to the Java float type.
| fieldname | name of the field to read |
| IllegalStateException | if PdxInstance doesn't have the named field. |
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pure virtual |
Reads the named field and sets its value in int32_t array type out param.
int32_t* type corresponds to the Java int[] type.
| fieldname | name of the field to read |
| IllegalStateException | if PdxInstance doesn't have the named field. |
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pure virtual |
Reads the named field and sets its value in int32_t type out param.
int32_t type corresponds to the Java int type.
| fieldname | name of the field to read |
| IllegalStateException | if PdxInstance doesn't have the named field. |
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pure virtual |
Reads the named field and sets its value in int64_t array type out param.
int64_t* type corresponds to the Java long[] type.
| fieldname | name of the field to read |
| IllegalStateException | if PdxInstance doesn't have the named field. |
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pure virtual |
Reads the named field and sets its value in int64_t type out param.
int64_t type corresponds to the Java long type.
| fieldname | name of the field to read |
| IllegalStateException | if PdxInstance doesn't have the named field. |
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pure virtual |
Deserializes and returns the domain object that this instance represents.
For deserialization C++ Native Client requires the domain class to be registered.
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pure virtual |
Reads the named field and sets its value in int16_t array type out param.
int16_t* type corresponds to the Java short[] type.
| fieldname | name of the field to read |
| IllegalStateException | if PdxInstance doesn't have the named field. |
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pure virtual |
Reads the named field and sets its value in int16_t type out param.
int16_t type corresponds to the Java short type.
| fieldname | name of the field to read |
| IllegalStateException | if PdxInstance doesn't have the named field. |
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pure virtual |
Reads the named field as a string array.
std::vector<std::string> type corresponds to the Java String[] type.
| fieldname | name of the field to read |
| IllegalStateException | if PdxInstance doesn't have the named field. |
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pure virtual |
Reads the named field and sets its value in std::string type out param.
std::string type corresponds to the Java String type.
| fieldname | name of the field to read |
| IllegalStateException | if PdxInstance doesn't have the named field. |
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pure virtual |
Checks if the named field exists and returns the result.
This can be useful when writing code that handles more than one version of a PDX class.
| fieldname | the name of the field to check |
true if the named field exists; otherwise false
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overridepure virtual |
Generates a hashcode based on the identity fields of this PdxInstance.
If a PdxInstance has marked identity fields using PdxWriter#markIdentityField then only the marked identity fields are its identity fields. Otherwise all its fields are identity fields.
For deserialization C++ Native Client requires the domain class to be registered. If the field is an array then all array elements are used for hashcode computation. Otherwise the raw bytes of its value are used to compute the hash code.
| IllegalStateException | if the field contains an element that is not of CacheableKey derived type. |
Implements apache::geode::client::CacheableKey.
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pure virtual |
Checks if the named field was PdxWriter#markIdentityFieldmarked as an identity field.
Note that if no fields have been marked then all the fields are used as identity fields even though this method will return false since none of them have been marked.
| fieldname | the name of the field to check |
true if the named field exists and was marked as an identify field; otherwise false
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overridepure virtual |
Reimplemented from apache::geode::client::Serializable.
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overridepure virtual |
Returns true if the given CacheableKey derived object is equals to this instance.
If other is not a PdxInstance then it is not equal to this instance. NOTE: Even if other is the result of calling getObject() it will not be equal to this instance
.
Otherwise equality of two PdxInstances is determined as follows:
If one of the instances does not have a field that the other one does then equals will assume it has the field with a default value. If a PdxInstance has marked identity fields using markIdentityField then only the marked identity fields are its identity fields. Otherwise all its fields are identity fields.
An identity field is equal if all the following are true:
If an identity field is of type derived from Cacheable then it is deserialized. For deserialization C++ Native Client requires the domain class to be registered. If the deserialized object is an array then all array elements are used to determine equality. If an identity field is of type CacheableObjectArray then it is deserialized and all array elements are used to determine equality. For all other field types the value does not need to be deserialized. Instead the serialized raw bytes are compared and used to determine equality.
| other | the other instance to compare to this. |
true if this instance is equal to other. | IllegalStateException | if the field contains an element that is not of CacheableKey derived type. |
Implements apache::geode::client::CacheableKey.
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overridepure virtual |
serialize this object in geode PDX format.
This is an internal method.
| output | to serialize the PDX object |
Implements apache::geode::client::PdxSerializable.
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overridepure virtual |
Prints out all of the identity fields of this PdxInstance.
If a PdxInstance has marked identity fields using PdxWriter#markIdentityField then only the marked identity fields are its identity fields. Otherwise all its fields are identity fields
. For deserialization C++ Native Client requires the domain class to be registered.
Reimplemented from apache::geode::client::Serializable.