ByteBufferInput (protostuff :: core 1.7.4 API)

java.lang.Object
- io.protostuff.ByteBufferInput

All Implemented Interfaces:

Input
```
public final class ByteBufferInput
extends Object
implements Input
```
Reads and decodes protocol buffer message fields from an internal byte array buffer. This object is re-usable via doing a reset on the byte array position and length. This is used internally by IOUtil where it catches ArrayIndexOutOfBoundsException when a message is truncated.

Author:

David Yu

Date created:

Jun 22, 2010

Field Summary

Fields
Modifier and Type Field and Description

boolean decodeNestedMessageAsGroup
If true, the nested messages are group-encoded

Fields
Modifier and Type	Field and Description
`boolean`	`decodeNestedMessageAsGroup` If true, the nested messages are group-encoded

Constructor Summary

Constructors
Constructor and Description

ByteBufferInput(ByteBuffer buffer, boolean protostuffMessage)
An input for a ByteBuffer

Constructors
Constructor and Description
`ByteBufferInput(ByteBuffer buffer, boolean protostuffMessage)` An input for a ByteBuffer

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`checkLastTagWas(int value)` Verifies that the last call to readTag() returned the given tag value.
`int`	`currentLimit()` Returns the current limit (the end index).
`int`	`currentOffset()` Returns the current offset (the position).
`int`	`getLastTag()` Returns the last tag.
`<T> void`	`handleUnknownField(int fieldNumber, Schema<T> schema)`
`boolean`	`isCurrentFieldPacked()` Return true if currently reading packed field
`<T> T`	`mergeObject(T value, Schema<T> schema)`
`boolean`	`readBool()` Read a `bool` field value from the internal buffer.
`byte[]`	`readByteArray()`
`ByteBuffer`	`readByteBuffer()` Reads a byte array/ByteBuffer value.
`ByteString`	`readBytes()`
`void`	`readBytes(ByteBuffer bb)`
`double`	`readDouble()` Read a `double` field value from the internal buffer.
`int`	`readEnum()` Read an enum field value from the internal buffer.
`<T> int`	`readFieldNumber(Schema<T> schema)`
`int`	`readFixed32()` Read a `fixed32` field value from the internal buffer.
`long`	`readFixed64()` Read a `fixed64` field value from the internal buffer.
`float`	`readFloat()` Read a `float` field value from the internal buffer.
`int`	`readInt32()` Read an `int32` field value from the internal buffer.
`long`	`readInt64()` Read an `int64` field value from the internal buffer.
`int`	`readRawLittleEndian32()` Read a 32-bit little-endian integer from the internal buffer.
`long`	`readRawLittleEndian64()` Read a 64-bit little-endian integer from the internal byte buffer.
`int`	`readRawVarint32()` Reads a var int 32 from the internal byte buffer.
`long`	`readRawVarint64()` Reads a var int 64 from the internal byte buffer.
`int`	`readSFixed32()` Read an `sfixed32` field value from the internal buffer.
`long`	`readSFixed64()` Read an `sfixed64` field value from the internal buffer.
`int`	`readSInt32()` Read an `sint32` field value from the internal buffer.
`long`	`readSInt64()` Read an `sint64` field value from the internal buffer.
`String`	`readString()`
`int`	`readTag()` Attempt to read a field tag, returning zero if we have reached EOF.
`int`	`readUInt32()` Read a `uint32` field value from the internal buffer.
`long`	`readUInt64()` Read a `uint64` field value from the internal buffer.
`ByteBufferInput`	`reset(int offset, int len)` Resets the offset and the limit of the internal buffer.
`boolean`	`skipField(int tag)` Reads and discards a single field, given its tag value.
`void`	`skipMessage()` Reads and discards an entire message.
`void`	`transferByteRangeTo(Output output, boolean utf8String, int fieldNumber, boolean repeated)`

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

- Field Detail
  - decodeNestedMessageAsGroup
```
public final boolean decodeNestedMessageAsGroup
```
    If true, the nested messages are group-encoded
- Constructor Detail
  - ByteBufferInput
```
public ByteBufferInput(ByteBuffer buffer,
               boolean protostuffMessage)
```
    An input for a ByteBuffer
    
    Parameters:
    buffer - the buffer to read from, it will be sliced
    protostuffMessage - if we are parsing a protostuff (true) or protobuf (false) message
- Method Detail
  - reset
```
public ByteBufferInput reset(int offset,
                    int len)
```
    Resets the offset and the limit of the internal buffer.
  - currentOffset
```
public int currentOffset()
```
    Returns the current offset (the position).
  - currentLimit
```
public int currentLimit()
```
    Returns the current limit (the end index).
  - isCurrentFieldPacked
```
public boolean isCurrentFieldPacked()
```
    Return true if currently reading packed field
  - getLastTag
```
public int getLastTag()
```
    Returns the last tag.
  - readTag
```
public int readTag()
            throws IOException
```
    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.
    
    Throws:
    
    IOException
  - checkLastTagWas
```
public void checkLastTagWas(int value)
                     throws ProtobufException
```
    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.
    
    Throws:
    
    ProtobufException - value does not match the last tag.
  - skipField
```
public boolean skipField(int tag)
                  throws IOException
```
    Reads and discards a single field, given its tag value.
    
    Returns:
    false if the tag is an endgroup tag, in which case nothing is skipped. Otherwise, returns true.
    
    Throws:
    
    IOException
  - skipMessage
```
public void skipMessage()
                 throws IOException
```
    Reads and discards an entire message. This will read either until EOF or until an endgroup tag, whichever comes first.
    
    Throws:
    
    IOException
  - handleUnknownField
```
public <T> void handleUnknownField(int fieldNumber,
                          Schema<T> schema)
                        throws IOException
```
    Specified by:
    
    handleUnknownField in interface Input
    
    Throws:
    
    IOException
  - readFieldNumber
```
public <T> int readFieldNumber(Schema<T> schema)
                    throws IOException
```
    Specified by:
    
    readFieldNumber in interface Input
    
    Throws:
    
    IOException
  - readDouble
```
public double readDouble()
                  throws IOException
```
    Read a double field value from the internal buffer.
    
    Specified by:
    
    readDouble in interface Input
    
    Throws:
    
    IOException
  - readFloat
```
public float readFloat()
                throws IOException
```
    Read a float field value from the internal buffer.
    
    Specified by:
    
    readFloat in interface Input
    
    Throws:
    
    IOException
  - readUInt64
```
public long readUInt64()
                throws IOException
```
    Read a uint64 field value from the internal buffer.
    
    Specified by:
    
    readUInt64 in interface Input
    
    Throws:
    
    IOException
  - readInt64
```
public long readInt64()
               throws IOException
```
    Read an int64 field value from the internal buffer.
    
    Specified by:
    
    readInt64 in interface Input
    
    Throws:
    
    IOException
  - readInt32
```
public int readInt32()
              throws IOException
```
    Read an int32 field value from the internal buffer.
    
    Specified by:
    
    readInt32 in interface Input
    
    Throws:
    
    IOException
  - readFixed64
```
public long readFixed64()
                 throws IOException
```
    Read a fixed64 field value from the internal buffer.
    
    Specified by:
    
    readFixed64 in interface Input
    
    Throws:
    
    IOException
  - readFixed32
```
public int readFixed32()
                throws IOException
```
    Read a fixed32 field value from the internal buffer.
    
    Specified by:
    
    readFixed32 in interface Input
    
    Throws:
    
    IOException
  - readBool
```
public boolean readBool()
                 throws IOException
```
    Read a bool field value from the internal buffer.
    
    Specified by:
    
    readBool in interface Input
    
    Throws:
    
    IOException
  - readUInt32
```
public int readUInt32()
               throws IOException
```
    Read a uint32 field value from the internal buffer.
    
    Specified by:
    
    readUInt32 in interface Input
    
    Throws:
    
    IOException
  - readEnum
```
public int readEnum()
             throws IOException
```
    Read an enum field value from the internal buffer. Caller is responsible for converting the numeric value to an actual enum.
    
    Specified by:
    
    readEnum in interface Input
    
    Throws:
    
    IOException
  - readSFixed32
```
public int readSFixed32()
                 throws IOException
```
    Read an sfixed32 field value from the internal buffer.
    
    Specified by:
    
    readSFixed32 in interface Input
    
    Throws:
    
    IOException
  - readSFixed64
```
public long readSFixed64()
                  throws IOException
```
    Read an sfixed64 field value from the internal buffer.
    
    Specified by:
    
    readSFixed64 in interface Input
    
    Throws:
    
    IOException
  - readSInt32
```
public int readSInt32()
               throws IOException
```
    Read an sint32 field value from the internal buffer.
    
    Specified by:
    
    readSInt32 in interface Input
    
    Throws:
    
    IOException
  - readSInt64
```
public long readSInt64()
                throws IOException
```
    Read an sint64 field value from the internal buffer.
    
    Specified by:
    
    readSInt64 in interface Input
    
    Throws:
    
    IOException
  - readString
```
public String readString()
                  throws IOException
```
    Specified by:
    
    readString in interface Input
    
    Throws:
    
    IOException
  - readBytes
```
public ByteString readBytes()
                     throws IOException
```
    Specified by:
    
    readBytes in interface Input
    
    Throws:
    
    IOException
  - readBytes
```
public void readBytes(ByteBuffer bb)
               throws IOException
```
    Specified by:
    
    readBytes in interface Input
    
    Throws:
    
    IOException
  - readByteArray
```
public byte[] readByteArray()
                     throws IOException
```
    Specified by:
    
    readByteArray in interface Input
    
    Throws:
    
    IOException
  - mergeObject
```
public <T> T mergeObject(T value,
                Schema<T> schema)
              throws IOException
```
    Specified by:
    
    mergeObject in interface Input
    
    Throws:
    
    IOException
  - readRawVarint32
```
public int readRawVarint32()
                    throws IOException
```
    Reads a var int 32 from the internal byte buffer.
    
    Throws:
    
    IOException
  - readRawVarint64
```
public long readRawVarint64()
                     throws IOException
```
    Reads a var int 64 from the internal byte buffer.
    
    Throws:
    
    IOException
  - readRawLittleEndian32
```
public int readRawLittleEndian32()
                          throws IOException
```
    Read a 32-bit little-endian integer from the internal buffer.
    
    Throws:
    
    IOException
  - readRawLittleEndian64
```
public long readRawLittleEndian64()
                           throws IOException
```
    Read a 64-bit little-endian integer from the internal byte buffer.
    
    Throws:
    
    IOException
  - transferByteRangeTo
```
public void transferByteRangeTo(Output output,
                       boolean utf8String,
                       int fieldNumber,
                       boolean repeated)
                         throws IOException
```
    Specified by:
    
    transferByteRangeTo in interface Input
    
    Throws:
    
    IOException
  - readByteBuffer
```
public ByteBuffer readByteBuffer()
                          throws IOException
```
    Reads a byte array/ByteBuffer value.
    
    Specified by:
    
    readByteBuffer in interface Input
    
    Throws:
    
    IOException

Class ByteBufferInput

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

decodeNestedMessageAsGroup

Constructor Detail

ByteBufferInput

Method Detail

reset

currentOffset

currentLimit

isCurrentFieldPacked

getLastTag

readTag

checkLastTagWas

skipField

skipMessage

handleUnknownField

readFieldNumber

readDouble

readFloat

readUInt64

readInt64

readInt32

readFixed64

readFixed32

readBool

readUInt32

readEnum

readSFixed32

readSFixed64

readSInt32

readSInt64

readString

readBytes

readBytes

readByteArray

mergeObject

readRawVarint32

readRawVarint64

readRawLittleEndian32

readRawLittleEndian64

transferByteRangeTo

readByteBuffer