com.ericsson.otp.erlang

Class OtpErlangLong

java.lang.Object

com.ericsson.otp.erlang.OtpErlangObject

com.ericsson.otp.erlang.OtpErlangLong

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

Direct Known Subclasses:

OtpErlangByte, OtpErlangChar, OtpErlangInt, OtpErlangShort, OtpErlangUInt, OtpErlangUShort

public class OtpErlangLong
extends OtpErlangObject

Provides a Java representation of Erlang integral types. Erlang does not distinguish between different integral types, however this class and its subclasses OtpErlangByte, OtpErlangChar, OtpErlangInt , and OtpErlangShort attempt to map the Erlang types onto the various Java integral types. Two additional classes, OtpErlangUInt and OtpErlangUShort are provided for Corba compatibility. See the documentation for IC for more information.

See Also:

Serialized Form

Nested Class Summary

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

OtpErlangObject.Hash

Field Summary

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

hashCodeValue

Constructor Summary

Constructors

Constructor and Description
OtpErlangLong(java.math.BigInteger v) Create an Erlang integer from the given value.
OtpErlangLong(long l) Create an Erlang integer from the given value.
OtpErlangLong(OtpInputStream buf) Create an Erlang integer from a stream containing an integer encoded in Erlang external format.

Method Summary

Modifier and Type	Method and Description
java.math.BigInteger	bigIntegerValue() Get this number as a BigInteger.
int	bitLength() Returns the number of bits in the minimal two's-complement representation of this BigInteger, excluding a sign bit.
byte	byteValue() Get this number as a byte.
char	charValue() Get this number as a char.
protected int	doHashCode()
void	encode(OtpOutputStream buf) Convert this number to the equivalent Erlang external representation.
boolean	equals(java.lang.Object o) Determine if two numbers are equal.
int	intValue() Get this number as an int.
boolean	isLong() Determine if this value can be represented as a long without truncation.
boolean	isULong() Determine if this value can be represented as an unsigned long without truncation, that is if the value is non-negative and its bit pattern completely fits in a long.
long	longValue() Get this number as a long, or rather truncate all but the least significant 64 bits from the 2's complement representation of this number and return them as a long.
short	shortValue() Get this number as a short.
int	signum() Return the signum function of this object.
java.lang.String	toString() Get the string representation of this number.
int	uIntValue() Get this number as a non-negative int.
short	uShortValue() Get this number as a non-negative short.

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

bind, clone, decode, hashCode, match

Methods inherited from class java.lang.Object

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

Constructor Detail

OtpErlangLong

public OtpErlangLong(long l)

Create an Erlang integer from the given value.

Parameters:

l - the long value to use.

OtpErlangLong

public OtpErlangLong(java.math.BigInteger v)

Create an Erlang integer from the given value.

Parameters:

v - the big integer value to use.

OtpErlangLong

public OtpErlangLong(OtpInputStream buf)
              throws OtpErlangDecodeException

Create an Erlang integer from a stream containing an integer encoded in Erlang external format.

Parameters:

buf - the stream containing the encoded value.

Throws:

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

Method Detail

bigIntegerValue

public java.math.BigInteger bigIntegerValue()

Get this number as a BigInteger.

Returns:

the value of this number, as a BigInteger.

longValue

public long longValue()

Get this number as a long, or rather truncate all but the least significant 64 bits from the 2's complement representation of this number and return them as a long.

Returns:

the value of this number, as a long.

isLong

public boolean isLong()

Determine if this value can be represented as a long without truncation.

Returns:

true if this value fits in a long, false otherwise.

isULong

public boolean isULong()

Determine if this value can be represented as an unsigned long without truncation, that is if the value is non-negative and its bit pattern completely fits in a long.

Returns:

true if this value is non-negative and fits in a long false otherwise.

bitLength

public int bitLength()

Returns the number of bits in the minimal two's-complement representation of this BigInteger, excluding a sign bit.

Returns:

number of bits in the minimal two's-complement representation of this BigInteger, excluding a sign bit.

signum

public int signum()

Return the signum function of this object.

Returns:

-1, 0 or 1 as the value is negative, zero or positive.

intValue

public int intValue()
             throws OtpErlangRangeException

Get this number as an int.

Returns:

the value of this number, as an int.

Throws:

OtpErlangRangeException - if the value is too large to be represented as an int.

uIntValue

public int uIntValue()
              throws OtpErlangRangeException

Get this number as a non-negative int.

Returns:

the value of this number, as an int.

Throws:

OtpErlangRangeException - if the value is too large to be represented as an int, or if the value is negative.

shortValue

public short shortValue()
                 throws OtpErlangRangeException

Get this number as a short.

Returns:

the value of this number, as a short.

Throws:

OtpErlangRangeException - if the value is too large to be represented as a short.

uShortValue

public short uShortValue()
                  throws OtpErlangRangeException

Get this number as a non-negative short.

Returns:

the value of this number, as a short.

Throws:

OtpErlangRangeException - if the value is too large to be represented as a short, or if the value is negative.

charValue

public char charValue()
               throws OtpErlangRangeException

Get this number as a char.

Returns:

the char value of this number.

Throws:

OtpErlangRangeException - if the value is too large to be represented as a char.

byteValue

public byte byteValue()
               throws OtpErlangRangeException

Get this number as a byte.

Returns:

the byte value of this number.

Throws:

OtpErlangRangeException - if the value is too large to be represented as a byte.

toString

public java.lang.String toString()

Get the string representation of this number.

Specified by:

toString in class OtpErlangObject

Returns:

the string representation of this number.

encode

public void encode(OtpOutputStream buf)

Convert this number to the equivalent Erlang external representation.

Specified by:

encode in class OtpErlangObject

Parameters:

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

equals

public boolean equals(java.lang.Object o)

Determine if two numbers are equal. Numbers are equal if they contain the same value.

Specified by:

equals in class OtpErlangObject

Parameters:

o - the number to compare to.

Returns:

true if the numbers have the same value.

doHashCode

protected int doHashCode()

Overrides:

doHashCode in class OtpErlangObject