CodedInputStream

java.lang.Object
- java.io.InputStream
- - java.io.FilterInputStream
  - - org.fusesource.hawtbuf.proto.CodedInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable
```
public final class CodedInputStream
extends java.io.FilterInputStream
```
Reads and decodes protocol message fields. This class contains two kinds of methods: methods that read specific protocol message constructs and field types (e.g. readTag() and readInt32()) and methods that read low-level values (e.g. readRawVarint32() and readRawBytes(int)). If you are reading encoded protocol messages, you should use the former methods, but if you are reading some other format of your own design, use the latter.

Field Summary

Fields
Modifier and Type Field and Description

private BufferInputStream bis

private int lastTag

private int limit

private int pos
- Fields inherited from class java.io.FilterInputStream
  in

Fields
Modifier and Type	Field and Description
`private BufferInputStream`	`bis`
`private int`	`lastTag`
`private int`	`limit`
`private int`	`pos`

Constructor Summary

Constructors
Constructor and Description

CodedInputStream(Buffer data)

CodedInputStream(byte[] data)

CodedInputStream(java.io.InputStream in)

Constructors
Constructor and Description
`CodedInputStream(Buffer data)`
`CodedInputStream(byte[] data)`
`CodedInputStream(java.io.InputStream in)`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`checkLastTagWas(int value)` Verifies that the last call to readTag() returned the given tag value.
`static int`	`decodeZigZag32(int n)` Decode a ZigZag-encoded 32-bit value.
`static long`	`decodeZigZag64(long n)` Decode a ZigZag-encoded 64-bit value.
`void`	`popLimit(int limit)`
`int`	`pushLimit(int limit)`
`boolean`	`readBool()` Read a `bool` field value from the stream.
`Buffer`	`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.
`int`	`readInt32()` Read an `int32` field value from the stream.
`long`	`readInt64()` Read an `int64` field value from the stream.
`byte`	`readRawByte()` Read one byte from the input.
`Buffer`	`readRawBytes(int size)` 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.
`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.
`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.
`boolean`	`skipField(int tag)` Reads and discards a single field, given its tag value.
`void`	`skipMessage()` Reads and discards an entire message.
`void`	`skipRawBytes(int size)` Reads and discards `size` bytes.

Methods inherited from class java.io.FilterInputStream
available, close, mark, markSupported, read, read, read, reset, skip

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

- Field Detail
  - lastTag
```
private int lastTag
```
  - limit
```
private int limit
```
  - pos
```
private int pos
```
  - bis
```
private BufferInputStream bis
```
- Constructor Detail
  - CodedInputStream
```
public CodedInputStream(java.io.InputStream in)
```
  - CodedInputStream
```
public CodedInputStream(Buffer data)
```
  - CodedInputStream
```
public CodedInputStream(byte[] data)
```
- Method Detail
  - readTag
```
public int readTag()
            throws java.io.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:
    
    java.io.IOException
  - checkLastTagWas
```
public void checkLastTagWas(int value)
                     throws InvalidProtocolBufferException
```
    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:
    
    InvalidProtocolBufferException - value does not match the last tag.
  - skipField
```
public boolean skipField(int tag)
                  throws java.io.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:
    
    java.io.IOException
  - skipMessage
```
public void skipMessage()
                 throws java.io.IOException
```
    Reads and discards an entire message. This will read either until EOF or until an endgroup tag, whichever comes first.
    
    Throws:
    
    java.io.IOException
  - readDouble
```
public double readDouble()
                  throws java.io.IOException
```
    Read a double field value from the stream.
    
    Throws:
    
    java.io.IOException
  - readFloat
```
public float readFloat()
                throws java.io.IOException
```
    Read a float field value from the stream.
    
    Throws:
    
    java.io.IOException
  - readUInt64
```
public long readUInt64()
                throws java.io.IOException
```
    Read a uint64 field value from the stream.
    
    Throws:
    
    java.io.IOException
  - readInt64
```
public long readInt64()
               throws java.io.IOException
```
    Read an int64 field value from the stream.
    
    Throws:
    
    java.io.IOException
  - readInt32
```
public int readInt32()
              throws java.io.IOException
```
    Read an int32 field value from the stream.
    
    Throws:
    
    java.io.IOException
  - readFixed64
```
public long readFixed64()
                 throws java.io.IOException
```
    Read a fixed64 field value from the stream.
    
    Throws:
    
    java.io.IOException
  - readFixed32
```
public int readFixed32()
                throws java.io.IOException
```
    Read a fixed32 field value from the stream.
    
    Throws:
    
    java.io.IOException
  - readBool
```
public boolean readBool()
                 throws java.io.IOException
```
    Read a bool field value from the stream.
    
    Throws:
    
    java.io.IOException
  - readString
```
public java.lang.String readString()
                            throws java.io.IOException
```
    Read a string field value from the stream.
    
    Throws:
    
    java.io.IOException
  - readBytes
```
public Buffer readBytes()
                 throws java.io.IOException
```
    Read a bytes field value from the stream.
    
    Throws:
    
    java.io.IOException
  - readUInt32
```
public int readUInt32()
               throws java.io.IOException
```
    Read a uint32 field value from the stream.
    
    Throws:
    
    java.io.IOException
  - readEnum
```
public int readEnum()
             throws java.io.IOException
```
    Read an enum field value from the stream. Caller is responsible for converting the numeric value to an actual enum.
    
    Throws:
    
    java.io.IOException
  - readSFixed32
```
public int readSFixed32()
                 throws java.io.IOException
```
    Read an sfixed32 field value from the stream.
    
    Throws:
    
    java.io.IOException
  - readSFixed64
```
public long readSFixed64()
                  throws java.io.IOException
```
    Read an sfixed64 field value from the stream.
    
    Throws:
    
    java.io.IOException
  - readSInt32
```
public int readSInt32()
               throws java.io.IOException
```
    Read an sint32 field value from the stream.
    
    Throws:
    
    java.io.IOException
  - readSInt64
```
public long readSInt64()
                throws java.io.IOException
```
    Read an sint64 field value from the stream.
    
    Throws:
    
    java.io.IOException
  - readRawVarint32
```
public int readRawVarint32()
                    throws java.io.IOException
```
    Read a raw Varint from the stream. If larger than 32 bits, discard the upper bits.
    
    Throws:
    
    java.io.IOException
  - readRawVarint64
```
public long readRawVarint64()
                     throws java.io.IOException
```
    Read a raw Varint from the stream.
    
    Throws:
    
    java.io.IOException
  - readRawLittleEndian32
```
public int readRawLittleEndian32()
                          throws java.io.IOException
```
    Read a 32-bit little-endian integer from the stream.
    
    Throws:
    
    java.io.IOException
  - readRawLittleEndian64
```
public long readRawLittleEndian64()
                           throws java.io.IOException
```
    Read a 64-bit little-endian integer from the stream.
    
    Throws:
    
    java.io.IOException
  - decodeZigZag32
```
public static int decodeZigZag32(int n)
```
    Decode a ZigZag-encoded 32-bit value. ZigZag encodes signed integers into values that can be efficiently encoded with varint. (Otherwise, negative values must be sign-extended to 64 bits to be varint encoded, thus always taking 10 bytes on the wire.)
    
    Parameters:
    
    n - An unsigned 32-bit integer, stored in a signed int because Java has no explicit unsigned support.
    
    Returns:
    
    A signed 32-bit integer.
  - decodeZigZag64
```
public static long decodeZigZag64(long n)
```
    Decode a ZigZag-encoded 64-bit value. ZigZag encodes signed integers into values that can be efficiently encoded with varint. (Otherwise, negative values must be sign-extended to 64 bits to be varint encoded, thus always taking 10 bytes on the wire.)
    
    Parameters:
    
    n - An unsigned 64-bit integer, stored in a signed int because Java has no explicit unsigned support.
    
    Returns:
    
    A signed 64-bit integer.
  - readRawByte
```
public byte readRawByte()
                 throws java.io.IOException
```
    Read one byte from the input.
    
    Throws:
    
    InvalidProtocolBufferException - The end of the stream or the current limit was reached.
    
    java.io.IOException
  - readRawBytes
```
public Buffer readRawBytes(int size)
                    throws java.io.IOException
```
    Read a fixed size of bytes from the input.
    
    Throws:
    
    InvalidProtocolBufferException - The end of the stream or the current limit was reached.
    
    java.io.IOException
  - skipRawBytes
```
public void skipRawBytes(int size)
                  throws java.io.IOException
```
    Reads and discards size bytes.
    
    Throws:
    
    InvalidProtocolBufferException - The end of the stream or the current limit was reached.
    
    java.io.IOException
  - pushLimit
```
public int pushLimit(int limit)
```
  - popLimit
```
public void popLimit(int limit)
```

Class CodedInputStream

Field Summary

Fields inherited from class java.io.FilterInputStream

Constructor Summary

Method Summary

Methods inherited from class java.io.FilterInputStream

Methods inherited from class java.lang.Object

Field Detail

lastTag

limit

pos

bis

Constructor Detail

CodedInputStream

CodedInputStream

CodedInputStream

Method Detail

readTag

checkLastTagWas

skipField

skipMessage

readDouble

readFloat

readUInt64

readInt64

readInt32

readFixed64

readFixed32

readBool

readString

readBytes

readUInt32

readEnum

readSFixed32

readSFixed64

readSInt32

readSInt64

readRawVarint32

readRawVarint64

readRawLittleEndian32

readRawLittleEndian64

decodeZigZag32

decodeZigZag64

readRawByte

readRawBytes

skipRawBytes

pushLimit

popLimit