Package com.google.appengine.api.datastore

Class PropertyProjection

java.lang.Object

com.google.appengine.api.datastore.Projection

com.google.appengine.api.datastore.PropertyProjection

All Implemented Interfaces:

Serializable

public final class PropertyProjection
extends Projection

A property projection.

If specified on a query, this will cause the query return the specified property.

See Also:

• Query.getProjections()
• Serialized Form

Constructor Summary

Constructors

Constructor	Description
PropertyProjection(String propertyName, @Nullable Class<?> type)	Constructs a property projection.

Method Summary

Modifier and Type	Method	Description
boolean	equals(@Nullable Object obj)
String	getName()	Returns the name of the property this projection populates.
@Nullable Class<?>	getType()	Returns the type specified for this projection.
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Details

PropertyProjection

public PropertyProjection(String propertyName,
 @Nullable Class<?> type)

Constructs a property projection.

If type is specified, RawValue.asType(Class) will be used to restore the original value of the property. Otherwise instances of RawValue will be returned.

Parameters:

propertyName - The name of the property to project

type - The type of values stored in the projected properties or null if the type is not known or variable. If null, RawValues are returned.

Method Details

getName

public String getName()

Description copied from class: Projection

Returns the name of the property this projection populates.

Specified by:

getName in class Projection

getType

public @Nullable Class<?> getType()

Returns the type specified for this projection.

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(@Nullable Object obj)

Overrides:

equals in class Object