Classes
interface	BooleanList

interface	DoubleList

interface	EnumLite

interface	EnumLiteMap

interface	EnumVerifier

interface	FloatList

interface	IntList

class	ListAdapter

interface	LongList

class	MapAdapter

interface	ProtobufList

Static Public Member Functions
static byte[]	byteArrayDefaultValue (String bytes)

static ByteBuffer	byteBufferDefaultValue (String bytes)

static ByteString	bytesDefaultValue (String bytes)

static ByteBuffer	copyByteBuffer (ByteBuffer source)

static boolean	equals (List< byte[]> a, List< byte[]> b)

static boolean	equalsByteBuffer (ByteBuffer a, ByteBuffer b)

static boolean	equalsByteBuffer (List< ByteBuffer > a, List< ByteBuffer > b)

static< T extends MessageLite > T	getDefaultInstance (Class< T > clazz)

static int	hashBoolean (boolean b)

static int	hashCode (byte[] bytes)

static int	hashCode (List< byte[]> list)

static int	hashCodeByteBuffer (ByteBuffer bytes)

static int	hashCodeByteBuffer (List< ByteBuffer > list)

static int	hashEnum (EnumLite e)

static int	hashEnumList (List<? extends EnumLite > list)

static int	hashLong (long n)

static boolean	isValidUtf8 (byte[] byteArray)

static boolean	isValidUtf8 (ByteString byteString)

static String	stringDefaultValue (String bytes)

static byte[]	toByteArray (String value)

static String	toStringUtf8 (byte[] bytes)

Static Public Attributes
static final byte[]	EMPTY_BYTE_ARRAY = new byte[0]

static final ByteBuffer	EMPTY_BYTE_BUFFER = ByteBuffer.wrap(EMPTY_BYTE_ARRAY)

static final CodedInputStream	EMPTY_CODED_INPUT_STREAM

Private Member Functions
	Internal ()

Static Private Attributes
static final int	DEFAULT_BUFFER_SIZE = 4096

Detailed Description

The classes contained within are used internally by the Protocol Buffer library and generated message implementations. They are public only because those generated messages do not reside in the

protobuf

package. Others should not use this class directly.

Author: kento.nosp@m.n@go.nosp@m.ogle..nosp@m.com (Kenton Varda)

Definition at line 54 of file Internal.java.

Constructor & Destructor Documentation

◆ Internal()

com.google.protobuf.Internal.Internal ( )

inlineprivate

Definition at line 56 of file Internal.java.

Member Function Documentation

◆ byteArrayDefaultValue()

static byte [] com.google.protobuf.Internal.byteArrayDefaultValue ( String bytes )

inlinestatic

Helper called by generated code to construct default values for bytes fields.

This is like bytesDefaultValue, but returns a byte array.

Definition at line 118 of file Internal.java.

◆ byteBufferDefaultValue()

static ByteBuffer com.google.protobuf.Internal.byteBufferDefaultValue ( String bytes )

inlinestatic

Helper called by generated code to construct default values for bytes fields.

This is like bytesDefaultValue, but returns a ByteBuffer.

Definition at line 127 of file Internal.java.

◆ bytesDefaultValue()

static ByteString com.google.protobuf.Internal.bytesDefaultValue ( String bytes )

inlinestatic

Helper called by generated code to construct default values for bytes fields.

This is a lot like stringDefaultValue, but for bytes fields. In this case we only need the second of the two hacks – allowing us to embed raw bytes as a string literal with ISO-8859-1 encoding.

Definition at line 110 of file Internal.java.

◆ copyByteBuffer()

static ByteBuffer com.google.protobuf.Internal.copyByteBuffer ( ByteBuffer source )

inlinestatic

Create a new ByteBuffer and copy all the content of

source

ByteBuffer to the new ByteBuffer. The new ByteBuffer's limit and capacity will be source.capacity(), and its position will be 0. Note that the state of

source

ByteBuffer won't be changed.

Definition at line 136 of file Internal.java.

◆ equals()

static boolean com.google.protobuf.Internal.equals	(	List< byte[]>	a,
		List< byte[]>	b
	)

inlinestatic

Helper method for implementing Message#equals(Object) for bytes field.

Definition at line 258 of file Internal.java.

◆ equalsByteBuffer() [1/2]

static boolean com.google.protobuf.Internal.equalsByteBuffer	(	ByteBuffer	a,
		ByteBuffer	b
	)

inlinestatic

Helper method for implementing Message#equals(Object) for bytes field.

Definition at line 305 of file Internal.java.

◆ equalsByteBuffer() [2/2]

static boolean com.google.protobuf.Internal.equalsByteBuffer	(	List< ByteBuffer >	a,
		List< ByteBuffer >	b
	)

inlinestatic

Helper method for implementing Message#equals(Object) for bytes field.

Definition at line 315 of file Internal.java.

◆ getDefaultInstance()

static <T extends MessageLite> T com.google.protobuf.Internal.getDefaultInstance ( Class< T > clazz )

inlinestatic

Definition at line 364 of file Internal.java.

◆ hashBoolean()

static int com.google.protobuf.Internal.hashBoolean ( boolean b )

inlinestatic

Helper method for implementing Message#hashCode() for booleans.

See also: Boolean::hashCode()

Definition at line 233 of file Internal.java.

◆ hashCode() [1/2]

static int com.google.protobuf.Internal.hashCode ( byte[] bytes )

inlinestatic

Helper method for implementing Message#hashCode() for bytes field.

Definition at line 278 of file Internal.java.

◆ hashCode() [2/2]

static int com.google.protobuf.Internal.hashCode ( List< byte[]> list )

inlinestatic

Helper method for implementing Message#hashCode() for bytes field.

Definition at line 269 of file Internal.java.

◆ hashCodeByteBuffer() [1/2]

static int com.google.protobuf.Internal.hashCodeByteBuffer ( ByteBuffer bytes )

inlinestatic

Helper method for implementing Message#hashCode() for bytes field.

Definition at line 339 of file Internal.java.

◆ hashCodeByteBuffer() [2/2]

static int com.google.protobuf.Internal.hashCodeByteBuffer ( List< ByteBuffer > list )

inlinestatic

Helper method for implementing Message#hashCode() for bytes field.

Definition at line 328 of file Internal.java.

◆ hashEnum()

static int com.google.protobuf.Internal.hashEnum ( EnumLite e )

inlinestatic

Helper method for implementing Message#hashCode() for enums.

This is needed because java.lang.Enum#hashCode() is final, but we need to use the field number as the hash code to ensure compatibility between statically and dynamically generated enum objects.

Definition at line 244 of file Internal.java.

◆ hashEnumList()

static int com.google.protobuf.Internal.hashEnumList ( List<? extends EnumLite > list )

inlinestatic

Helper method for implementing Message#hashCode() for enum lists.

Definition at line 249 of file Internal.java.

◆ hashLong()

static int com.google.protobuf.Internal.hashLong ( long n )

inlinestatic

Helper method for implementing Message#hashCode() for longs.

See also: Long::hashCode()

Definition at line 224 of file Internal.java.

◆ isValidUtf8() [1/2]

static boolean com.google.protobuf.Internal.isValidUtf8 ( byte[] byteArray )

inlinestatic

Like isValidUtf8(ByteString) but for byte arrays.

Definition at line 180 of file Internal.java.

◆ isValidUtf8() [2/2]

static boolean com.google.protobuf.Internal.isValidUtf8 ( ByteString byteString )

inlinestatic

Helper called by generated code to determine if a byte array is a valid UTF-8 encoded string such that the original bytes can be converted to a String object and then back to a byte array round tripping the bytes without loss. More precisely, returns

true

whenever:

Arrays.equals(byteString.toByteArray(),
    new String(byteString.toByteArray(), "UTF-8").getBytes("UTF-8"))

This method rejects "overlong" byte sequences, as well as 3-byte sequences that would map to a surrogate character, in accordance with the restricted definition of UTF-8 introduced in Unicode 3.1. Note that the UTF-8 decoder included in Oracle's JDK has been modified to also reject "overlong" byte sequences, but currently (2011) still accepts 3-byte surrogate character byte sequences.

See the Unicode Standard,
Table 3-6. UTF-8 Bit Distribution,
Table 3-7. Well Formed UTF-8 Byte Sequences.

As of 2011-02, this method simply returns the result of ByteString#isValidUtf8(). Calling that method directly is preferred.

Parameters

byteString the string to check

Returns: whether the byte array is round trippable

Definition at line 175 of file Internal.java.

◆ stringDefaultValue()

static String com.google.protobuf.Internal.stringDefaultValue ( String bytes )

inlinestatic

Helper called by generated code to construct default values for string fields.

The protocol compiler does not actually contain a UTF-8 decoder – it just pushes UTF-8-encoded text around without touching it. The one place where this presents a problem is when generating Java string literals. Unicode characters in the string literal would normally need to be encoded using a Unicode escape sequence, which would require decoding them. To get around this, protoc instead embeds the UTF-8 bytes into the generated code and leaves it to the runtime library to decode them.

It gets worse, though. If protoc just generated a byte array, like: new byte[] {0x12, 0x34, 0x56, 0x78} Java actually generates code which allocates an array and then fills in each value. This is much less efficient than just embedding the bytes directly into the bytecode. To get around this, we need another work-around. String literals are embedded directly, so protoc actually generates a string literal corresponding to the bytes. The easiest way to do this is to use the ISO-8859-1 character set, which corresponds to the first 256 characters of the Unicode range. Protoc can then use good old CEscape to generate the string.

So we have a string literal which represents a set of bytes which represents another string. This function – stringDefaultValue – converts from the generated string to the string we actually want. The generated code calls this automatically.

Definition at line 99 of file Internal.java.

◆ toByteArray()

static byte [] com.google.protobuf.Internal.toByteArray ( String value )

inlinestatic

Helper method to get the UTF-8 bytes of a string.

Definition at line 185 of file Internal.java.

◆ toStringUtf8()

static String com.google.protobuf.Internal.toStringUtf8 ( byte[] bytes )

inlinestatic

Helper method to convert a byte array to a string using UTF-8 encoding.

Definition at line 190 of file Internal.java.

Member Data Documentation

◆ DEFAULT_BUFFER_SIZE

final int com.google.protobuf.Internal.DEFAULT_BUFFER_SIZE = 4096

staticprivate

Definition at line 336 of file Internal.java.

◆ EMPTY_BYTE_ARRAY

final byte [] com.google.protobuf.Internal.EMPTY_BYTE_ARRAY = new byte[0]

static

An empty byte array constant used in generated code.

Definition at line 375 of file Internal.java.

◆ EMPTY_BYTE_BUFFER

final ByteBuffer com.google.protobuf.Internal.EMPTY_BYTE_BUFFER = ByteBuffer.wrap(EMPTY_BYTE_ARRAY)

static

An empty byte array constant used in generated code.

Definition at line 378 of file Internal.java.

◆ EMPTY_CODED_INPUT_STREAM

final CodedInputStream com.google.protobuf.Internal.EMPTY_CODED_INPUT_STREAM

static

Initial value:

=

CodedInputStream.newInstance(EMPTY_BYTE_ARRAY)

An empty coded input stream constant used in generated code.

Definition at line 381 of file Internal.java.

The documentation for this class was generated from the following file:

Internal.java

Classes

Static Public Member Functions

Static Public Attributes

Private Member Functions

Static Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ Internal()

Member Function Documentation

◆ byteArrayDefaultValue()

◆ byteBufferDefaultValue()

◆ bytesDefaultValue()

◆ copyByteBuffer()

◆ equals()

◆ equalsByteBuffer() [1/2]

◆ equalsByteBuffer() [2/2]

◆ getDefaultInstance()

◆ hashBoolean()

◆ hashCode() [1/2]

◆ hashCode() [2/2]

◆ hashCodeByteBuffer() [1/2]

◆ hashCodeByteBuffer() [2/2]

◆ hashEnum()

◆ hashEnumList()

◆ hashLong()

◆ isValidUtf8() [1/2]

◆ isValidUtf8() [2/2]

◆ stringDefaultValue()

◆ toByteArray()

◆ toStringUtf8()

Member Data Documentation

◆ DEFAULT_BUFFER_SIZE

◆ EMPTY_BYTE_ARRAY

◆ EMPTY_BYTE_BUFFER

◆ EMPTY_CODED_INPUT_STREAM