Package com.ericsson.otp.erlang

Class OtpErlangBitstr

java.lang.Object

com.ericsson.otp.erlang.OtpErlangObject

com.ericsson.otp.erlang.OtpErlangBitstr

Direct Known Subclasses:

OtpErlangBinary

public class OtpErlangBitstr
extends OtpErlangObject

Provides a Java representation of Erlang bitstrs. An Erlang bitstr is an Erlang binary with a length not an integral number of bytes (8-bit). Anything can be represented as a sequence of bytes can be made into an Erlang bitstr.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.ericsson.otp.erlang.OtpErlangObject

OtpErlangObject.Hash

Field Summary

Fields

Modifier and Type	Field	Description
protected byte[]	bin
protected int	pad_bits

Fields inherited from class com.ericsson.otp.erlang.OtpErlangObject

hashCodeValue

Constructor Summary

Constructors

Constructor	Description
OtpErlangBitstr(byte[] bin)	Create a bitstr from a byte array
OtpErlangBitstr(byte[] bin, int pad_bits)	Create a bitstr with pad bits from a byte array.
OtpErlangBitstr(OtpInputStream buf)	Create a bitstr from a stream containing a bitstr encoded in Erlang external format.
OtpErlangBitstr(java.lang.Object o)	Create a bitstr from an arbitrary Java Object.

Method Summary

Modifier and Type	Method	Description
byte[]	binaryValue()	Get the byte array from a bitstr, padded with zero bits in the little end of the last byte.
java.lang.Object	clone()
protected int	doHashCode()
void	encode(OtpOutputStream buf)	Convert this bitstr to the equivalent Erlang external representation.
boolean	equals(java.lang.Object o)	Determine if two bitstrs are equal.
java.lang.Object	getObject()	Get the java Object from the bitstr.
int	pad_bits()	Get the number of pad bits in the last byte of the bitstr.
int	size()	Get the size in whole bytes of the bitstr, rest bits in the last byte not counted.
java.lang.String	toString()	Get the string representation of this bitstr object.

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from class com.ericsson.otp.erlang.OtpErlangObject

bind, decode, hashCode, match

Field Detail

bin

protected byte[] bin

pad_bits

protected int pad_bits

Constructor Detail

OtpErlangBitstr

public OtpErlangBitstr(byte[] bin)

Create a bitstr from a byte array

Parameters:

bin - the array of bytes from which to create the bitstr.

OtpErlangBitstr

public OtpErlangBitstr(byte[] bin,
                       int pad_bits)

Create a bitstr with pad bits from a byte array.

Parameters:

bin - the array of bytes from which to create the bitstr.

pad_bits - the number of unused bits in the low end of the last byte.

OtpErlangBitstr

public OtpErlangBitstr(OtpInputStream buf)
                throws OtpErlangDecodeException

Create a bitstr from a stream containing a bitstr encoded in Erlang external format.

Parameters:

buf - the stream containing the encoded bitstr.

Throws:

OtpErlangDecodeException - if the buffer does not contain a valid external representation of an Erlang bitstr.

OtpErlangBitstr

public OtpErlangBitstr(java.lang.Object o)

Create a bitstr from an arbitrary Java Object. The object must implement java.io.Serializable or java.io.Externalizable.

Parameters:

o - the object to serialize and create this bitstr from.

Method Detail

binaryValue

public byte[] binaryValue()

Get the byte array from a bitstr, padded with zero bits in the little end of the last byte.

Returns:

the byte array containing the bytes for this bitstr.

size

public int size()

Get the size in whole bytes of the bitstr, rest bits in the last byte not counted.

Returns:

the number of bytes contained in the bintstr.

pad_bits

public int pad_bits()

Get the number of pad bits in the last byte of the bitstr. The pad bits are zero and in the little end.

Returns:

the number of pad bits in the bitstr.

getObject

public java.lang.Object getObject()

Get the java Object from the bitstr. If the bitstr contains a serialized Java object, then this method will recreate the object.

Returns:

the java Object represented by this bitstr, or null if the bitstr does not represent a Java Object.

toString

public java.lang.String toString()

Get the string representation of this bitstr object. A bitstr is printed as #Bin<N>, where N is the number of bytes contained in the object or #bin<N-M> if there are M pad bits.

Specified by:

toString in class OtpErlangObject

Returns:

the Erlang string representation of this bitstr.

encode

public void encode(OtpOutputStream buf)

Convert this bitstr to the equivalent Erlang external representation.

Specified by:

encode in class OtpErlangObject

Parameters:

buf - an output stream to which the encoded bitstr should be written.

equals

public boolean equals(java.lang.Object o)

Determine if two bitstrs are equal. Bitstrs are equal if they have the same byte length and tail length, and the array of bytes is identical.

Specified by:

equals in class OtpErlangObject

Parameters:

o - the bitstr to compare to.

Returns:

true if the bitstrs contain the same bits, false otherwise.

doHashCode

protected int doHashCode()

Overrides:

doHashCode in class OtpErlangObject

clone

public java.lang.Object clone()

Overrides:

clone in class OtpErlangObject