Package com.google.protobuf
Class Timestamp
java.lang.Object
com.google.protobuf.AbstractMessageLite
com.google.protobuf.AbstractMessage
com.google.protobuf.GeneratedMessageV3
com.google.protobuf.Timestamp
- All Implemented Interfaces:
Message
,MessageLite
,MessageLiteOrBuilder
,MessageOrBuilder
,TimestampOrBuilder
,Serializable
A Timestamp represents a point in time independent of any time zone or local calendar, encoded as a count of seconds and fractions of seconds at nanosecond resolution. The count is relative to an epoch at UTC midnight on January 1, 1970, in the proleptic Gregorian calendar which extends the Gregorian calendar backwards to year one. All minutes are 60 seconds long. Leap seconds are "smeared" so that no leap second table is needed for interpretation, using a [24-hour linear smear](https://developers.google.com/time/smear). The range is from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z. By restricting to that range, we ensure that we can convert to and from [RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) date strings. # Examples Example 1: Compute Timestamp from POSIX `time()`. Timestamp timestamp; timestamp.set_seconds(time(NULL)); timestamp.set_nanos(0); Example 2: Compute Timestamp from POSIX `gettimeofday()`. struct timeval tv; gettimeofday(&tv, NULL); Timestamp timestamp; timestamp.set_seconds(tv.tv_sec); timestamp.set_nanos(tv.tv_usec * 1000); Example 3: Compute Timestamp from Win32 `GetSystemTimeAsFileTime()`. FILETIME ft; GetSystemTimeAsFileTime(&ft); UINT64 ticks = (((UINT64)ft.dwHighDateTime) << 32) | ft.dwLowDateTime; // A Windows tick is 100 nanoseconds. Windows epoch 1601-01-01T00:00:00Z // is 11644473600 seconds before Unix epoch 1970-01-01T00:00:00Z. Timestamp timestamp; timestamp.set_seconds((INT64) ((ticks / 10000000) - 11644473600LL)); timestamp.set_nanos((INT32) ((ticks % 10000000) * 100)); Example 4: Compute Timestamp from Java `System.currentTimeMillis()`. long millis = System.currentTimeMillis(); Timestamp timestamp = Timestamp.newBuilder().setSeconds(millis / 1000) .setNanos((int) ((millis % 1000) * 1000000)).build(); Example 5: Compute Timestamp from Java `Instant.now()`. Instant now = Instant.now(); Timestamp timestamp = Timestamp.newBuilder().setSeconds(now.getEpochSecond()) .setNanos(now.getNano()).build(); Example 6: Compute Timestamp from current time in Python. timestamp = Timestamp() timestamp.GetCurrentTime() # JSON Mapping In JSON format, the Timestamp type is encoded as a string in the [RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format. That is, the format is "{year}-{month}-{day}T{hour}:{min}:{sec}[.{frac_sec}]Z" where {year} is always expressed using four digits while {month}, {day}, {hour}, {min}, and {sec} are zero-padded to two digits each. The fractional seconds, which can go up to 9 digits (i.e. up to 1 nanosecond resolution), are optional. The "Z" suffix indicates the timezone ("UTC"); the timezone is required. A proto3 JSON serializer should always use UTC (as indicated by "Z") when printing the Timestamp type and a proto3 JSON parser should be able to accept both UTC and other timezones (as indicated by an offset). For example, "2017-01-15T01:30:15.01Z" encodes 15.01 seconds past 01:30 UTC on January 15, 2017. In JavaScript, one can convert a Date object to this format using the standard [toISOString()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toISOString) method. In Python, a standard `datetime.datetime` object can be converted to this format using [`strftime`](https://docs.python.org/2/library/time.html#time.strftime) with the time format spec '%Y-%m-%dT%H:%M:%S.%fZ'. Likewise, in Java, one can use the Joda Time's [`ISODateTimeFormat.dateTime()`]( http://www.joda.org/joda-time/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime%2D%2D ) to obtain a formatter capable of generating timestamps in this format.Protobuf type
google.protobuf.Timestamp
- See Also:
-
Nested Class Summary
Nested ClassesModifier and TypeClassDescriptionstatic final class
A Timestamp represents a point in time independent of any time zone or local calendar, encoded as a count of seconds and fractions of seconds at nanosecond resolution.Nested classes/interfaces inherited from class com.google.protobuf.GeneratedMessageV3
GeneratedMessageV3.BuilderParent, GeneratedMessageV3.ExtendableBuilder<MessageType extends GeneratedMessageV3.ExtendableMessage,
BuilderType extends GeneratedMessageV3.ExtendableBuilder<MessageType, BuilderType>>, GeneratedMessageV3.ExtendableMessage<MessageType extends GeneratedMessageV3.ExtendableMessage>, GeneratedMessageV3.ExtendableMessageOrBuilder<MessageType extends GeneratedMessageV3.ExtendableMessage>, GeneratedMessageV3.ExtensionDescriptorRetriever, GeneratedMessageV3.FieldAccessorTable, GeneratedMessageV3.UnusedPrivateParameter Nested classes/interfaces inherited from class com.google.protobuf.AbstractMessageLite
AbstractMessageLite.InternalOneOfEnum
-
Field Summary
FieldsModifier and TypeFieldDescriptionprivate static final Timestamp
private byte
private int
static final int
private long
static final int
private static final long
Fields inherited from class com.google.protobuf.GeneratedMessageV3
alwaysUseFieldBuilders, unknownFields
Fields inherited from class com.google.protobuf.AbstractMessage
memoizedSize
Fields inherited from class com.google.protobuf.AbstractMessageLite
memoizedHashCode
-
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionboolean
Compares the specified object with this message for equality.static Timestamp
Get an instance of the type with no fields set.static final Descriptors.Descriptor
int
getNanos()
Non-negative fractions of a second at nanosecond resolution.Gets the parser for a message of the same type as this message.long
Represents seconds of UTC time since Unix epoch 1970-01-01T00:00:00Z.int
Get the number of bytes required to encode this message.final UnknownFieldSet
Get theUnknownFieldSet
for this message.int
hashCode()
Returns the hash code value for this message.protected GeneratedMessageV3.FieldAccessorTable
Get the FieldAccessorTable for this type.final boolean
Returns true if all required fields in the message and all embedded messages are set, false otherwise.static Timestamp.Builder
static Timestamp.Builder
newBuilder
(Timestamp prototype) Constructs a new builder for a message of the same type as this message.protected Timestamp.Builder
TODO(xiaofeng): remove this together with GeneratedMessageV3.BuilderParent.protected Object
Creates a new instance of this message type.static Timestamp
parseDelimitedFrom
(InputStream input) static Timestamp
parseDelimitedFrom
(InputStream input, ExtensionRegistryLite extensionRegistry) static Timestamp
parseFrom
(byte[] data) static Timestamp
parseFrom
(byte[] data, ExtensionRegistryLite extensionRegistry) static Timestamp
parseFrom
(ByteString data) static Timestamp
parseFrom
(ByteString data, ExtensionRegistryLite extensionRegistry) static Timestamp
parseFrom
(CodedInputStream input) static Timestamp
parseFrom
(CodedInputStream input, ExtensionRegistryLite extensionRegistry) static Timestamp
parseFrom
(InputStream input) static Timestamp
parseFrom
(InputStream input, ExtensionRegistryLite extensionRegistry) static Timestamp
parseFrom
(ByteBuffer data) static Timestamp
parseFrom
(ByteBuffer data, ExtensionRegistryLite extensionRegistry) parser()
Constructs a builder initialized with the current message.void
writeTo
(CodedOutputStream output) Serializes the message and writes it tooutput
.Methods inherited from class com.google.protobuf.GeneratedMessageV3
canUseUnsafe, computeStringSize, computeStringSizeNoTag, emptyBooleanList, emptyDoubleList, emptyFloatList, emptyIntList, emptyLongList, enableAlwaysUseFieldBuildersForTesting, getAllFields, getAllFieldsRaw, getDescriptorForType, getField, getFieldRaw, getOneofFieldDescriptor, getRepeatedField, getRepeatedFieldCount, hasField, hasOneof, internalGetMapField, isStringEmpty, makeExtensionsImmutable, mergeFromAndMakeImmutableInternal, mutableCopy, mutableCopy, mutableCopy, mutableCopy, mutableCopy, newBooleanList, newBuilderForType, newDoubleList, newFloatList, newIntList, newLongList, parseDelimitedWithIOException, parseDelimitedWithIOException, parseUnknownField, parseUnknownFieldProto3, parseWithIOException, parseWithIOException, parseWithIOException, parseWithIOException, serializeBooleanMapTo, serializeIntegerMapTo, serializeLongMapTo, serializeStringMapTo, setAlwaysUseFieldBuildersForTesting, writeReplace, writeString, writeStringNoTag
Methods inherited from class com.google.protobuf.AbstractMessage
compareFields, findInitializationErrors, getInitializationErrorString, getMemoizedSerializedSize, hashBoolean, hashEnum, hashEnumList, hashFields, hashLong, newUninitializedMessageException, setMemoizedSerializedSize, toString
Methods inherited from class com.google.protobuf.AbstractMessageLite
addAll, addAll, checkByteStringIsUtf8, getSerializedSize, toByteArray, toByteString, writeDelimitedTo, writeTo
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
Methods inherited from interface com.google.protobuf.MessageLite
toByteArray, toByteString, writeDelimitedTo, writeTo
Methods inherited from interface com.google.protobuf.MessageOrBuilder
findInitializationErrors, getAllFields, getDescriptorForType, getField, getInitializationErrorString, getOneofFieldDescriptor, getRepeatedField, getRepeatedFieldCount, hasField, hasOneof
-
Field Details
-
serialVersionUID
private static final long serialVersionUID- See Also:
-
SECONDS_FIELD_NUMBER
public static final int SECONDS_FIELD_NUMBER- See Also:
-
seconds_
private long seconds_ -
NANOS_FIELD_NUMBER
public static final int NANOS_FIELD_NUMBER- See Also:
-
nanos_
private int nanos_ -
memoizedIsInitialized
private byte memoizedIsInitialized -
DEFAULT_INSTANCE
-
PARSER
-
-
Constructor Details
-
Timestamp
-
Timestamp
private Timestamp()
-
-
Method Details
-
newInstance
Description copied from class:GeneratedMessageV3
Creates a new instance of this message type. Overridden in the generated code.- Overrides:
newInstance
in classGeneratedMessageV3
-
getUnknownFields
Description copied from interface:MessageOrBuilder
Get theUnknownFieldSet
for this message.- Specified by:
getUnknownFields
in interfaceMessageOrBuilder
- Overrides:
getUnknownFields
in classGeneratedMessageV3
-
getDescriptor
-
internalGetFieldAccessorTable
Description copied from class:GeneratedMessageV3
Get the FieldAccessorTable for this type. We can't have the message class pass this in to the constructor because of bootstrapping trouble with DescriptorProtos.- Specified by:
internalGetFieldAccessorTable
in classGeneratedMessageV3
-
getSeconds
public long getSeconds()Represents seconds of UTC time since Unix epoch 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59Z inclusive.
int64 seconds = 1;
- Specified by:
getSeconds
in interfaceTimestampOrBuilder
- Returns:
- The seconds.
-
getNanos
public int getNanos()Non-negative fractions of a second at nanosecond resolution. Negative second values with fractions must still have non-negative nanos values that count forward in time. Must be from 0 to 999,999,999 inclusive.
int32 nanos = 2;
- Specified by:
getNanos
in interfaceTimestampOrBuilder
- Returns:
- The nanos.
-
isInitialized
public final boolean isInitialized()Description copied from interface:MessageLiteOrBuilder
Returns true if all required fields in the message and all embedded messages are set, false otherwise.- Specified by:
isInitialized
in interfaceMessageLiteOrBuilder
- Overrides:
isInitialized
in classGeneratedMessageV3
-
writeTo
Description copied from interface:MessageLite
Serializes the message and writes it tooutput
. This does not flush or close the stream.- Specified by:
writeTo
in interfaceMessageLite
- Overrides:
writeTo
in classGeneratedMessageV3
- Throws:
IOException
-
getSerializedSize
public int getSerializedSize()Description copied from interface:MessageLite
Get the number of bytes required to encode this message. The result is only computed on the first call and memoized after that. If this message requires more than Integer.MAX_VALUE bytes to encode, the return value will be smaller than the actual number of bytes required and might be negative.- Specified by:
getSerializedSize
in interfaceMessageLite
- Overrides:
getSerializedSize
in classGeneratedMessageV3
-
equals
Description copied from interface:Message
Compares the specified object with this message for equality. Returnstrue
if the given object is a message of the same type (as defined bygetDescriptorForType()
) and has identical values for all of its fields. Subclasses must implement this; inheritingObject.equals()
is incorrect.- Specified by:
equals
in interfaceMessage
- Overrides:
equals
in classAbstractMessage
- Parameters:
obj
- object to be compared for equality with this message- Returns:
true
if the specified object is equal to this message
-
hashCode
public int hashCode()Description copied from interface:Message
Returns the hash code value for this message. The hash code of a message should mix the message's type (object identity of the descriptor) with its contents (known and unknown field values). Subclasses must implement this; inheritingObject.hashCode()
is incorrect.- Specified by:
hashCode
in interfaceMessage
- Overrides:
hashCode
in classAbstractMessage
- Returns:
- the hash code value for this message
- See Also:
-
parseFrom
- Throws:
InvalidProtocolBufferException
-
parseFrom
public static Timestamp parseFrom(ByteBuffer data, ExtensionRegistryLite extensionRegistry) throws InvalidProtocolBufferException - Throws:
InvalidProtocolBufferException
-
parseFrom
- Throws:
InvalidProtocolBufferException
-
parseFrom
public static Timestamp parseFrom(ByteString data, ExtensionRegistryLite extensionRegistry) throws InvalidProtocolBufferException - Throws:
InvalidProtocolBufferException
-
parseFrom
- Throws:
InvalidProtocolBufferException
-
parseFrom
public static Timestamp parseFrom(byte[] data, ExtensionRegistryLite extensionRegistry) throws InvalidProtocolBufferException - Throws:
InvalidProtocolBufferException
-
parseFrom
- Throws:
IOException
-
parseFrom
public static Timestamp parseFrom(InputStream input, ExtensionRegistryLite extensionRegistry) throws IOException - Throws:
IOException
-
parseDelimitedFrom
- Throws:
IOException
-
parseDelimitedFrom
public static Timestamp parseDelimitedFrom(InputStream input, ExtensionRegistryLite extensionRegistry) throws IOException - Throws:
IOException
-
parseFrom
- Throws:
IOException
-
parseFrom
public static Timestamp parseFrom(CodedInputStream input, ExtensionRegistryLite extensionRegistry) throws IOException - Throws:
IOException
-
newBuilderForType
Description copied from interface:MessageLite
Constructs a new builder for a message of the same type as this message.- Specified by:
newBuilderForType
in interfaceMessage
- Specified by:
newBuilderForType
in interfaceMessageLite
-
newBuilder
-
newBuilder
-
toBuilder
Description copied from interface:MessageLite
Constructs a builder initialized with the current message. Use this to derive a new message from the current one.- Specified by:
toBuilder
in interfaceMessage
- Specified by:
toBuilder
in interfaceMessageLite
-
newBuilderForType
Description copied from class:GeneratedMessageV3
TODO(xiaofeng): remove this together with GeneratedMessageV3.BuilderParent.- Specified by:
newBuilderForType
in classGeneratedMessageV3
-
getDefaultInstance
-
parser
-
getParserForType
Description copied from interface:MessageLite
Gets the parser for a message of the same type as this message.- Specified by:
getParserForType
in interfaceMessage
- Specified by:
getParserForType
in interfaceMessageLite
- Overrides:
getParserForType
in classGeneratedMessageV3
-
getDefaultInstanceForType
Description copied from interface:MessageLiteOrBuilder
Get an instance of the type with no fields set. Because no fields are set, all getters for singular fields will return default values and repeated fields will appear empty. This may or may not be a singleton. This differs from thegetDefaultInstance()
method of generated message classes in that this method is an abstract method of theMessageLite
interface whereasgetDefaultInstance()
is a static method of a specific class. They return the same thing.- Specified by:
getDefaultInstanceForType
in interfaceMessageLiteOrBuilder
- Specified by:
getDefaultInstanceForType
in interfaceMessageOrBuilder
-