com.google.cloud.datastore

Class Query<V>

java.lang.Object

com.google.cloud.datastore.Query<V>

Type Parameters:

V - the type of the values returned by this query.

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

GqlQuery, StructuredQuery

public abstract class Query<V>
extends Object

A Google Cloud Datastore query. For usage examples see GqlQuery and StructuredQuery. Note that queries require proper indexing. See Cloud Datastore Index Configuration for help configuring indexes.

See Also:

Datastore Queries, Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Query.ResultType<V> This class represents the expected type of the result.

Method Summary

Methods

Modifier and Type	Method and Description
static EntityQuery.Builder	entityQueryBuilder() Returns a new StructuredQuery builder for full (complete entities) queries.
static <V> GqlQuery.Builder<V>	gqlQueryBuilder(Query.ResultType<V> resultType, String gql) Returns a new GqlQuery builder.
static GqlQuery.Builder<?>	gqlQueryBuilder(String gql) Returns a new GqlQuery builder.
static KeyQuery.Builder	keyQueryBuilder() Returns a new StructuredQuery builder for key only queries.
String	namespace()
static ProjectionEntityQuery.Builder	projectionEntityQueryBuilder() Returns a new StructuredQuery builder for projection queries.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Detail

namespace

public String namespace()

toString

public String toString()

gqlQueryBuilder

public static GqlQuery.Builder<?> gqlQueryBuilder(String gql)

Returns a new GqlQuery builder.

See Also:

GQL Reference

gqlQueryBuilder

public static <V> GqlQuery.Builder<V> gqlQueryBuilder(Query.ResultType<V> resultType,
                                      String gql)

Returns a new GqlQuery builder.

See Also:

GQL Reference

entityQueryBuilder

public static EntityQuery.Builder entityQueryBuilder()

Returns a new StructuredQuery builder for full (complete entities) queries.

keyQueryBuilder

public static KeyQuery.Builder keyQueryBuilder()

Returns a new StructuredQuery builder for key only queries.

projectionEntityQueryBuilder

public static ProjectionEntityQuery.Builder projectionEntityQueryBuilder()

Returns a new StructuredQuery builder for projection queries.