java.lang.Object
- com.google.protobuf.CodedInputStream
- - com.google.protobuf.CodedInputStream.UnsafeDirectNioDecoder

Enclosing class:

CodedInputStream
```
private static final class CodedInputStream.UnsafeDirectNioDecoder
extends CodedInputStream
```
A CodedInputStream implementation that uses a backing direct ByteBuffer as the input. Requires the use of sun.misc.Unsafe to perform fast reads on the buffer.

Field Summary

Fields
Modifier and Type	Field	Description
`private long`	`address`	The unsafe address of the content of `buffer`.
`private java.nio.ByteBuffer`	`buffer`	The direct buffer that is backing this stream.
`private int`	`bufferSizeAfterLimit`	The amount of available data in the buffer beyond `limit`.
`private int`	`currentLimit`	The absolute position of the end of the current message.
`private boolean`	`enableAliasing`	If `true`, indicates that calls to read `ByteString` or `byte[]` may return slices of the underlying buffer, rather than copies.
`private boolean`	`immutable`	If `true`, indicates that the buffer is backing a `ByteString` and is therefore considered to be an immutable input source.
`private int`	`lastTag`	The last tag that was read from this stream.
`private long`	`limit`	The unsafe address of the current read limit of the buffer.
`private long`	`pos`	The unsafe address of the current read position of the buffer.
`private long`	`startPos`	The unsafe address of the starting read position.

Fields inherited from class com.google.protobuf.CodedInputStream
recursionDepth, recursionLimit, sizeLimit, wrapper

Constructor Summary

Constructors
Modifier Constructor Description

private UnsafeDirectNioDecoder(java.nio.ByteBuffer buffer, boolean immutable)

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`private int`	`bufferPos(long pos)`
`void`	`checkLastTagWas(int value)`	Verifies that the last call to readTag() returned the given tag value.
`void`	`enableAliasing(boolean enabled)`	Enables `ByteString` aliasing of the underlying buffer, trading off on buffer pinning for data copies.
`int`	`getBytesUntilLimit()`	Returns the number of bytes to be read before the current limit.
`int`	`getLastTag()`
`int`	`getTotalBytesRead()`	The total bytes read up to the current position.
`boolean`	`isAtEnd()`	Returns true if the stream has reached the end of the input.
`(package private) static boolean`	`isSupported()`
`void`	`popLimit(int oldLimit)`	Discards the current limit, returning to the previous limit.
`int`	`pushLimit(int byteLimit)`	Sets `currentLimit` to (current position) + `byteLimit`.
`boolean`	`readBool()`	Read a `bool` field value from the stream.
`byte[]`	`readByteArray()`	Read a `bytes` field value from the stream.
`java.nio.ByteBuffer`	`readByteBuffer()`	Read a `bytes` field value from the stream.
`ByteString`	`readBytes()`	Read a `bytes` field value from the stream.
`double`	`readDouble()`	Read a `double` field value from the stream.
`int`	`readEnum()`	Read an enum field value from the stream.
`int`	`readFixed32()`	Read a `fixed32` field value from the stream.
`long`	`readFixed64()`	Read a `fixed64` field value from the stream.
`float`	`readFloat()`	Read a `float` field value from the stream.
`void`	`readGroup(int fieldNumber, MessageLite.Builder builder, ExtensionRegistryLite extensionRegistry)`	Read a `group` field value from the stream.
`<T extends MessageLite> T`	`readGroup(int fieldNumber, Parser<T> parser, ExtensionRegistryLite extensionRegistry)`	Read a `group` field value from the stream.
`int`	`readInt32()`	Read an `int32` field value from the stream.
`long`	`readInt64()`	Read an `int64` field value from the stream.
`void`	`readMessage(MessageLite.Builder builder, ExtensionRegistryLite extensionRegistry)`	Read an embedded message field value from the stream.
`<T extends MessageLite> T`	`readMessage(Parser<T> parser, ExtensionRegistryLite extensionRegistry)`	Read an embedded message field value from the stream.
`byte`	`readRawByte()`	Read one byte from the input.
`byte[]`	`readRawBytes(int length)`	Read a fixed size of bytes from the input.
`int`	`readRawLittleEndian32()`	Read a 32-bit little-endian integer from the stream.
`long`	`readRawLittleEndian64()`	Read a 64-bit little-endian integer from the stream.
`int`	`readRawVarint32()`	Read a raw Varint from the stream.
`long`	`readRawVarint64()`	Read a raw Varint from the stream.
`(package private) long`	`readRawVarint64SlowPath()`	Variant of readRawVarint64 for when uncomfortably close to the limit.
`int`	`readSFixed32()`	Read an `sfixed32` field value from the stream.
`long`	`readSFixed64()`	Read an `sfixed64` field value from the stream.
`int`	`readSInt32()`	Read an `sint32` field value from the stream.
`long`	`readSInt64()`	Read an `sint64` field value from the stream.
`java.lang.String`	`readString()`	Read a `string` field value from the stream.
`java.lang.String`	`readStringRequireUtf8()`	Read a `string` field value from the stream.
`int`	`readTag()`	Attempt to read a field tag, returning zero if we have reached EOF.
`int`	`readUInt32()`	Read a `uint32` field value from the stream.
`long`	`readUInt64()`	Read a `uint64` field value from the stream.
`void`	`readUnknownGroup(int fieldNumber, MessageLite.Builder builder)`	Deprecated.
`private void`	`recomputeBufferSizeAfterLimit()`
`private int`	`remaining()`
`void`	`resetSizeCounter()`	Resets the current size counter to zero (see `CodedInputStream.setSizeLimit(int)`).
`boolean`	`skipField(int tag)`	Reads and discards a single field, given its tag value.
`boolean`	`skipField(int tag, CodedOutputStream output)`	Reads a single field and writes it to output in wire format, given its tag value.
`void`	`skipRawBytes(int length)`	Reads and discards `size` bytes.
`private void`	`skipRawVarint()`
`private void`	`skipRawVarintFastPath()`
`private void`	`skipRawVarintSlowPath()`
`private java.nio.ByteBuffer`	`slice(long begin, long end)`

Methods inherited from class com.google.protobuf.CodedInputStream
checkRecursionLimit, decodeZigZag32, decodeZigZag64, discardUnknownFields, newInstance, newInstance, newInstance, newInstance, newInstance, newInstance, newInstance, newInstance, newInstance, readRawVarint32, readRawVarint32, setRecursionLimit, setSizeLimit, shouldDiscardUnknownFields, skipMessage, skipMessage, unsetDiscardUnknownFields

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - buffer
```
private final java.nio.ByteBuffer buffer
```
    The direct buffer that is backing this stream.
  - immutable
```
private final boolean immutable
```
    If true, indicates that the buffer is backing a ByteString and is therefore considered to be an immutable input source.
  - address
```
private final long address
```
    The unsafe address of the content of buffer.
  - limit
```
private long limit
```
    The unsafe address of the current read limit of the buffer.
  - pos
```
private long pos
```
    The unsafe address of the current read position of the buffer.
  - startPos
```
private long startPos
```
    The unsafe address of the starting read position.
  - bufferSizeAfterLimit
```
private int bufferSizeAfterLimit
```
    The amount of available data in the buffer beyond limit.
  - lastTag
```
private int lastTag
```
    The last tag that was read from this stream.
  - enableAliasing
```
private boolean enableAliasing
```
    If true, indicates that calls to read ByteString or byte[] may return slices of the underlying buffer, rather than copies.
  - currentLimit
```
private int currentLimit
```
    The absolute position of the end of the current message.
- Constructor Detail
  - UnsafeDirectNioDecoder
```
private UnsafeDirectNioDecoder(java.nio.ByteBuffer buffer,
                               boolean immutable)
```
- Method Detail
  - isSupported
```
static boolean isSupported()
```
  - readTag
```
public int readTag()
            throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Attempt to read a field tag, returning zero if we have reached EOF. Protocol message parsers use this to read tags, since a protocol message may legally end wherever a tag occurs, and zero is not a valid tag number.
    
    Specified by:
    
    readTag in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - checkLastTagWas
```
public void checkLastTagWas(int value)
                     throws InvalidProtocolBufferException
```
    Description copied from class: CodedInputStream
    
    Verifies that the last call to readTag() returned the given tag value. This is used to verify that a nested group ended with the correct end tag.
    
    Specified by:
    
    checkLastTagWas in class CodedInputStream
    
    Throws:
    
    InvalidProtocolBufferException - value does not match the last tag.
  - getLastTag
```
public int getLastTag()
```
    Specified by:
    
    getLastTag in class CodedInputStream
  - skipField
```
public boolean skipField(int tag)
                  throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Reads and discards a single field, given its tag value.
    
    Specified by:
    
    skipField in class CodedInputStream
    
    Returns:
    
    false if the tag is an endgroup tag, in which case nothing is skipped. Otherwise, returns true.
    
    Throws:
    
    java.io.IOException
  - skipField
```
public boolean skipField(int tag,
                         CodedOutputStream output)
                  throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Reads a single field and writes it to output in wire format, given its tag value.
    
    Specified by:
    
    skipField in class CodedInputStream
    
    Returns:
    
    false if the tag is an endgroup tag, in which case nothing is skipped. Otherwise, returns true.
    
    Throws:
    
    java.io.IOException
  - readDouble
```
public double readDouble()
                  throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read a double field value from the stream.
    
    Specified by:
    
    readDouble in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readFloat
```
public float readFloat()
                throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read a float field value from the stream.
    
    Specified by:
    
    readFloat in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readUInt64
```
public long readUInt64()
                throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read a uint64 field value from the stream.
    
    Specified by:
    
    readUInt64 in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readInt64
```
public long readInt64()
               throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read an int64 field value from the stream.
    
    Specified by:
    
    readInt64 in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readInt32
```
public int readInt32()
              throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read an int32 field value from the stream.
    
    Specified by:
    
    readInt32 in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readFixed64
```
public long readFixed64()
                 throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read a fixed64 field value from the stream.
    
    Specified by:
    
    readFixed64 in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readFixed32
```
public int readFixed32()
                throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read a fixed32 field value from the stream.
    
    Specified by:
    
    readFixed32 in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readBool
```
public boolean readBool()
                 throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read a bool field value from the stream.
    
    Specified by:
    
    readBool in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readString
```
public java.lang.String readString()
                            throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read a string field value from the stream. If the stream contains malformed UTF-8, replace the offending bytes with the standard UTF-8 replacement character.
    
    Specified by:
    
    readString in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readStringRequireUtf8
```
public java.lang.String readStringRequireUtf8()
                                       throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read a string field value from the stream. If the stream contains malformed UTF-8, throw exception InvalidProtocolBufferException.
    
    Specified by:
    
    readStringRequireUtf8 in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readGroup
```
public void readGroup(int fieldNumber,
                      MessageLite.Builder builder,
                      ExtensionRegistryLite extensionRegistry)
               throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read a group field value from the stream.
    
    Specified by:
    
    readGroup in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readGroup
```
public <T extends MessageLite> T readGroup(int fieldNumber,
                                           Parser<T> parser,
                                           ExtensionRegistryLite extensionRegistry)
                                    throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read a group field value from the stream.
    
    Specified by:
    
    readGroup in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readUnknownGroup
```
@Deprecated
public void readUnknownGroup(int fieldNumber,
                             MessageLite.Builder builder)
                      throws java.io.IOException
```
    Deprecated.
    
    Description copied from class: CodedInputStream
    
    Reads a group field value from the stream and merges it into the given UnknownFieldSet.
    
    Specified by:
    
    readUnknownGroup in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readMessage
```
public void readMessage(MessageLite.Builder builder,
                        ExtensionRegistryLite extensionRegistry)
                 throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read an embedded message field value from the stream.
    
    Specified by:
    
    readMessage in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readMessage
```
public <T extends MessageLite> T readMessage(Parser<T> parser,
                                             ExtensionRegistryLite extensionRegistry)
                                      throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read an embedded message field value from the stream.
    
    Specified by:
    
    readMessage in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readBytes
```
public ByteString readBytes()
                     throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read a bytes field value from the stream.
    
    Specified by:
    
    readBytes in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readByteArray
```
public byte[] readByteArray()
                     throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read a bytes field value from the stream.
    
    Specified by:
    
    readByteArray in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readByteBuffer
```
public java.nio.ByteBuffer readByteBuffer()
                                   throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read a bytes field value from the stream.
    
    Specified by:
    
    readByteBuffer in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readUInt32
```
public int readUInt32()
               throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read a uint32 field value from the stream.
    
    Specified by:
    
    readUInt32 in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readEnum
```
public int readEnum()
             throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read an enum field value from the stream. Caller is responsible for converting the numeric value to an actual enum.
    
    Specified by:
    
    readEnum in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readSFixed32
```
public int readSFixed32()
                 throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read an sfixed32 field value from the stream.
    
    Specified by:
    
    readSFixed32 in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readSFixed64
```
public long readSFixed64()
                  throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read an sfixed64 field value from the stream.
    
    Specified by:
    
    readSFixed64 in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readSInt32
```
public int readSInt32()
               throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read an sint32 field value from the stream.
    
    Specified by:
    
    readSInt32 in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readSInt64
```
public long readSInt64()
                throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read an sint64 field value from the stream.
    
    Specified by:
    
    readSInt64 in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readRawVarint32
```
public int readRawVarint32()
                    throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read a raw Varint from the stream. If larger than 32 bits, discard the upper bits.
    
    Specified by:
    
    readRawVarint32 in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - skipRawVarint
```
private void skipRawVarint()
                    throws java.io.IOException
```
    Throws:
    
    java.io.IOException
  - skipRawVarintFastPath
```
private void skipRawVarintFastPath()
                            throws java.io.IOException
```
    Throws:
    
    java.io.IOException
  - skipRawVarintSlowPath
```
private void skipRawVarintSlowPath()
                            throws java.io.IOException
```
    Throws:
    
    java.io.IOException
  - readRawVarint64
```
public long readRawVarint64()
                     throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read a raw Varint from the stream.
    
    Specified by:
    
    readRawVarint64 in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readRawVarint64SlowPath
```
long readRawVarint64SlowPath()
                      throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Variant of readRawVarint64 for when uncomfortably close to the limit.
    
    Specified by:
    
    readRawVarint64SlowPath in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readRawLittleEndian32
```
public int readRawLittleEndian32()
                          throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read a 32-bit little-endian integer from the stream.
    
    Specified by:
    
    readRawLittleEndian32 in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - readRawLittleEndian64
```
public long readRawLittleEndian64()
                           throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read a 64-bit little-endian integer from the stream.
    
    Specified by:
    
    readRawLittleEndian64 in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - enableAliasing
```
public void enableAliasing(boolean enabled)
```
    Description copied from class: CodedInputStream
    
    Enables ByteString aliasing of the underlying buffer, trading off on buffer pinning for data copies. Only valid for buffer-backed streams.
    
    Specified by:
    
    enableAliasing in class CodedInputStream
  - resetSizeCounter
```
public void resetSizeCounter()
```
    Description copied from class: CodedInputStream
    
    Resets the current size counter to zero (see CodedInputStream.setSizeLimit(int)). Only valid for InputStream-backed streams.
    
    Specified by:
    
    resetSizeCounter in class CodedInputStream
  - pushLimit
```
public int pushLimit(int byteLimit)
              throws InvalidProtocolBufferException
```
    Description copied from class: CodedInputStream
    
    Sets currentLimit to (current position) + byteLimit. This is called when descending into a length-delimited embedded message.
    Note that pushLimit() does NOT affect how many bytes the CodedInputStream reads from an underlying InputStream when refreshing its buffer. If you need to prevent reading past a certain point in the underlying InputStream (e.g. because you expect it to contain more data after the end of the message which you need to handle differently) then you must place a wrapper around your InputStream which limits the amount of data that can be read from it.
    
    Specified by:
    
    pushLimit in class CodedInputStream
    
    Returns:
    
    the old limit.
    
    Throws:
    
    InvalidProtocolBufferException
  - popLimit
```
public void popLimit(int oldLimit)
```
    Description copied from class: CodedInputStream
    
    Discards the current limit, returning to the previous limit.
    
    Specified by:
    
    popLimit in class CodedInputStream
    
    Parameters:
    
    oldLimit - The old limit, as returned by pushLimit.
  - getBytesUntilLimit
```
public int getBytesUntilLimit()
```
    Description copied from class: CodedInputStream
    
    Returns the number of bytes to be read before the current limit. If no limit is set, returns -1.
    
    Specified by:
    
    getBytesUntilLimit in class CodedInputStream
  - isAtEnd
```
public boolean isAtEnd()
                throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Returns true if the stream has reached the end of the input. This is the case if either the end of the underlying input source has been reached or if the stream has reached a limit created using CodedInputStream.pushLimit(int). This function may get blocked when using StreamDecoder as it invokes CodedInputStream.StreamDecoder.tryRefillBuffer(int) in this function which will try to read bytes from input.
    
    Specified by:
    
    isAtEnd in class CodedInputStream
    
    Throws:
    
    java.io.IOException
  - getTotalBytesRead
```
public int getTotalBytesRead()
```
    Description copied from class: CodedInputStream
    
    The total bytes read up to the current position. Calling CodedInputStream.resetSizeCounter() resets this value to zero.
    
    Specified by:
    
    getTotalBytesRead in class CodedInputStream
  - readRawByte
```
public byte readRawByte()
                 throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read one byte from the input.
    
    Specified by:
    
    readRawByte in class CodedInputStream
    
    Throws:
    
    InvalidProtocolBufferException - The end of the stream or the current limit was reached.
    
    java.io.IOException
  - readRawBytes
```
public byte[] readRawBytes(int length)
                    throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Read a fixed size of bytes from the input.
    
    Specified by:
    
    readRawBytes in class CodedInputStream
    
    Throws:
    
    InvalidProtocolBufferException - The end of the stream or the current limit was reached.
    
    java.io.IOException
  - skipRawBytes
```
public void skipRawBytes(int length)
                  throws java.io.IOException
```
    Description copied from class: CodedInputStream
    
    Reads and discards size bytes.
    
    Specified by:
    
    skipRawBytes in class CodedInputStream
    
    Throws:
    
    InvalidProtocolBufferException - The end of the stream or the current limit was reached.
    
    java.io.IOException
  - recomputeBufferSizeAfterLimit
```
private void recomputeBufferSizeAfterLimit()
```
  - remaining
```
private int remaining()
```
  - bufferPos
```
private int bufferPos(long pos)
```
  - slice
```
private java.nio.ByteBuffer slice(long begin,
                                  long end)
                           throws java.io.IOException
```
    Throws:
    
    java.io.IOException

Class CodedInputStream.UnsafeDirectNioDecoder

Field Summary

Fields inherited from class com.google.protobuf.CodedInputStream

Constructor Summary

Method Summary

Methods inherited from class com.google.protobuf.CodedInputStream

Methods inherited from class java.lang.Object

Field Detail

buffer

immutable

address

limit

pos

startPos

bufferSizeAfterLimit

lastTag

enableAliasing

currentLimit

Constructor Detail

UnsafeDirectNioDecoder

Method Detail

isSupported

readTag

checkLastTagWas

getLastTag

skipField

skipField

readDouble

readFloat

readUInt64

readInt64

readInt32

readFixed64

readFixed32

readBool

readString

readStringRequireUtf8

readGroup

readGroup

readUnknownGroup

readMessage

readMessage

readBytes

readByteArray

readByteBuffer

readUInt32

readEnum

readSFixed32

readSFixed64

readSInt32

readSInt64

readRawVarint32

skipRawVarint

skipRawVarintFastPath

skipRawVarintSlowPath

readRawVarint64

readRawVarint64SlowPath

readRawLittleEndian32

readRawLittleEndian64

enableAliasing

resetSizeCounter

pushLimit

popLimit

getBytesUntilLimit

isAtEnd

getTotalBytesRead

readRawByte

readRawBytes

skipRawBytes

recomputeBufferSizeAfterLimit

remaining

bufferPos

slice