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java.lang.Objectcom.google.appengine.api.datastore.DataTypeTranslator
public final class DataTypeTranslator
DataTypeTranslator is a utility class for converting
between the data store's Property protocol buffers and the
the user-facing classes (String, User, etc.).
| Nested Class Summary | |
|---|---|
static class |
DataTypeTranslator.ComparableByteArray
A wrapper for a byte[] that implements Comparable. |
| Method Summary | |
|---|---|
static void |
addPropertiesToPb(java.util.Map<java.lang.String,java.lang.Object> map,
EntityProto proto)
Add all of the properties in the specified map to an EntityProto. |
static void |
extractImplicitPropertiesFromPb(EntityProto proto,
java.util.Map<java.lang.String,java.lang.Object> map)
Copy all of the implicit properties present on proto
into map. |
static void |
extractIndexedPropertiesFromPb(EntityProto proto,
java.util.Map<java.lang.String,java.lang.Object> map)
Copy all of the indexed properties present on proto
into map. |
static void |
extractPropertiesFromPb(EntityProto proto,
java.util.Map<java.lang.String,java.lang.Object> map)
Copy all of the properties present on proto
into map. |
static java.util.Collection<Property> |
findIndexedPropertiesOnPb(EntityProto proto,
java.lang.String propertyName)
Locates and returns all indexed properties with the given name on the given proto. |
static java.lang.Comparable<java.lang.Object> |
getComparablePropertyValue(Property property)
Returns the value for the property as its comparable representation type. |
static java.lang.Object |
getPropertyValue(Property property)
Returns the value for the property as its canonical type. |
static int |
getTypeRank(java.lang.Class<? extends java.lang.Comparable> datastoreType)
Get the rank of the given datastore type relative to other datastore types. |
| Methods inherited from class java.lang.Object |
|---|
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Method Detail |
|---|
public static void addPropertiesToPb(java.util.Map<java.lang.String,java.lang.Object> map,
EntityProto proto)
EntityProto.
This involves determining the type of each property and creating the
proper type-specific protocol buffer.
If the property value is an Entity.UnindexedValue, or if it's a
type that is never indexed, e.g. Text and Blob, it's
added to EntityProto.raw_property. Otherwise it's added to
EntityProto.property.
map - A not null map of all the properties which will
be set on protoproto - A not null protocol buffer
public static void extractIndexedPropertiesFromPb(EntityProto proto,
java.util.Map<java.lang.String,java.lang.Object> map)
proto
into map.
public static void extractPropertiesFromPb(EntityProto proto,
java.util.Map<java.lang.String,java.lang.Object> map)
proto
into map.
public static void extractImplicitPropertiesFromPb(EntityProto proto,
java.util.Map<java.lang.String,java.lang.Object> map)
proto
into map.
public static java.util.Collection<Property> findIndexedPropertiesOnPb(EntityProto proto,
java.lang.String propertyName)
public static java.lang.Object getPropertyValue(Property property)
property - a not null property
null if no value was set for propertypublic static java.lang.Comparable<java.lang.Object> getComparablePropertyValue(Property property)
property - a not null property
null if no value was set for propertypublic static int getTypeRank(java.lang.Class<? extends java.lang.Comparable> datastoreType)
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