Package com.tangosol.util

Class Fragment<T>

java.lang.Object

com.tangosol.util.Fragment<T>

Type Parameters:

T - the type of the object this fragment represents

All Implemented Interfaces:

ExternalizableLite, PortableObject, Serializable

public class Fragment<T>
extends Object
implements ExternalizableLite, PortableObject

An object that represents a fragment of another object.

Since:

21.06

Author:

Aleks Seovic 2021.02.22

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
Fragment()	Deserialization constructor.
Fragment(Map<String,Object> mapAttr)	Construct Fragment instance.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
<E> E	get(ValueExtractor<? super T,? extends E> extractor)	Get the value of the attribute extracted by the specified extractor.
<E> E	get(String sName)	Get the value of the attribute with the specified name or positional index.
<E> Fragment<E>	getFragment(ValueExtractor<? super T,? extends E> extractor)	Get the nested fragment extracted from the specified attribute.
<E> Fragment<E>	getFragment(String sName)	Get the nested fragment extracted from the specified attribute.
int	hashCode()
void	readExternal(PofReader in)	Restore the contents of a user type instance by reading its state using the specified PofReader object.
void	readExternal(DataInput in)	Restore the contents of this object by loading the object's state from the passed DataInput object.
Map<String,Object>	toMap()	Convert this Fragment into a Map.
String	toString()
void	writeExternal(PofWriter out)	Save the contents of a POF user type instance by writing its state using the specified PofWriter object.
void	writeExternal(DataOutput out)	Save the contents of this object by storing the object's state into the passed DataOutput object.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Fragment

public Fragment()

Deserialization constructor.

Fragment

public Fragment(Map<String,Object> mapAttr)

Construct Fragment instance.

Parameters:

mapAttr - a map of extracted attribute values, keyed by canonical name or extracted attribute position (if the name is null)

Method Detail

get

public <E> E get(ValueExtractor<? super T,? extends E> extractor)

Get the value of the attribute extracted by the specified extractor.

Type Parameters:

E - the type of extracted attribute

Parameters:

extractor - an extractor that was used to extract an attribute

Returns:

the value of the attribute extracted by the specified extractor

get

public <E> E get(String sName)

Get the value of the attribute with the specified name or positional index.

Type Parameters:

E - the type of extracted attribute

Parameters:

sName - the name of the attribute, or a positional index in the $N format

Returns:

the value of the specified attribute

getFragment

public <E> Fragment<E> getFragment(ValueExtractor<? super T,? extends E> extractor)

Get the nested fragment extracted from the specified attribute.

Type Parameters:

E - the type of attribute to extract a nested fragment from

Parameters:

extractor - an attribute to extract a nested fragment from

Returns:

the fragment extracted from the specified attribute

getFragment

public <E> Fragment<E> getFragment(String sName)

Get the nested fragment extracted from the specified attribute.

Type Parameters:

E - the type of attribute to extract a nested fragment from

Parameters:

sName - an attribute to extract a nested fragment from

Returns:

the fragment extracted from the specified attribute

toMap

public Map<String,Object> toMap()

Convert this Fragment into a Map.

Any nested fragments within this fragment will be recursively converted into the map as well.

Returns:

a Map with property names as keys, and the property values as values

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

readExternal

public void readExternal(DataInput in)
                  throws IOException

Description copied from interface: ExternalizableLite

Restore the contents of this object by loading the object's state from the passed DataInput object.

Specified by:

readExternal in interface ExternalizableLite

Parameters:

in - the DataInput stream to read data from in order to restore the state of this object

Throws:

IOException - if an I/O exception occurs

NotActiveException - if the object is not in its initial state, and therefore cannot be deserialized into

writeExternal

public void writeExternal(DataOutput out)
                   throws IOException

Description copied from interface: ExternalizableLite

Save the contents of this object by storing the object's state into the passed DataOutput object.

Specified by:

writeExternal in interface ExternalizableLite

Parameters:

out - the DataOutput stream to write the state of this object to

Throws:

IOException - if an I/O exception occurs

readExternal

public void readExternal(PofReader in)
                  throws IOException

Description copied from interface: PortableObject

Restore the contents of a user type instance by reading its state using the specified PofReader object.

Specified by:

readExternal in interface PortableObject

Parameters:

in - the PofReader from which to read the object's state

Throws:

IOException - if an I/O error occurs

writeExternal

public void writeExternal(PofWriter out)
                   throws IOException

Description copied from interface: PortableObject

Save the contents of a POF user type instance by writing its state using the specified PofWriter object.

Specified by:

writeExternal in interface PortableObject

Parameters:

out - the PofWriter to which to write the object's state

Throws:

IOException - if an I/O error occurs