net.sf.saxon.value
Class BigIntegerValue

java.lang.Object
  net.sf.saxon.value.Value
      net.sf.saxon.value.AtomicValue
          net.sf.saxon.value.NumericValue
              net.sf.saxon.value.IntegerValue
                  net.sf.saxon.value.BigIntegerValue

All Implemented Interfaces:

Serializable, Comparable, PullEvent, SequenceIterable, GroundedValue, Item, ValueRepresentation, ConversionResult

public final class BigIntegerValue
extends IntegerValue

An integer value: note this is a subtype of decimal in XML Schema, not a primitive type. The abstract class IntegerValue is used to represent any xs:integer value; this implementation is used for values that do not fit comfortably in a Java long; including the built-in subtype xs:unsignedLong

See Also:

Serialized Form

Field Summary

static BigInteger	MAX_LONG
static BigInteger	MAX_UNSIGNED_LONG
static BigInteger	MIN_LONG
static BigIntegerValue	ZERO

Fields inherited from class net.sf.saxon.value.IntegerValue

MINUS_ONE, PLUS_ONE, SMALL_INTEGERS

Fields inherited from class net.sf.saxon.value.Value

EMPTY_CLASS_ARRAY, INDETERMINATE_ORDERING

Fields inherited from interface net.sf.saxon.om.ValueRepresentation

EMPTY_VALUE_ARRAY

Fields inherited from interface net.sf.saxon.om.ValueRepresentation

EMPTY_VALUE_ARRAY

Constructor Summary

BigIntegerValue(BigInteger value)
Construct an xs:integer value from a Java BigInteger

BigIntegerValue(BigInteger value, AtomicType typeLabel)
Construct an xs:integer value from a Java BigInteger, supplying a type label.

BigIntegerValue(long value)
Construct an xs:integer value from a Java long.

Method Summary

BigInteger	asBigInteger() Get the value as a BigInteger
BigDecimal	asDecimal() Convert the value to a BigDecimal
NumericValue	ceiling() Implement the XPath ceiling() function
int	compareTo(long other) Compare the value to a long
int	compareTo(Object other) Compare the value to another numeric value
ConversionResult	convertPrimitive(BuiltInAtomicType requiredType, boolean validate, XPathContext context) Convert to target data type
Object	convertToJava(Class target, XPathContext context) Convert to Java object (for passing to external functions)
ValidationFailure	convertToSubType(BuiltInAtomicType type, boolean validate) This class allows subtypes of xs:integer to be held, as well as xs:integer values.
AtomicValue	copyAsSubType(AtomicType typeLabel) Create a copy of this atomic value, with a different type label
NumericValue	div(IntegerValue other) Divide by another integer
boolean	effectiveBooleanValue() Return the effective boolean value of this integer
NumericValue	floor() Implement the XPath floor() function
BigDecimal	getDecimalValue() Get the numeric value converted to a decimal
double	getDoubleValue() Get the numeric value as a double
Comparable	getSchemaComparable() Get an object that implements XML Schema comparison semantics
String	getStringValue() Get the value as a String
int	hashCode() Get the hashCode.
IntegerValue	idiv(IntegerValue other) Integer divide by another integer
boolean	isWholeNumber() Determine whether the value is a whole number, that is, whether it compares equal to some integer
boolean	isWithinLongRange() Test whether the value is within the range that can be held in a 64-bit signed integer
long	longValue() Get the value as a long
IntegerValue	minus(IntegerValue other) Subtract another integer
IntegerValue	mod(IntegerValue other) Take modulo another integer
NumericValue	negate() Negate the value
IntegerValue	plus(IntegerValue other) Add another integer
Value	reduce() Reduce a value to its simplest form.
NumericValue	round() Implement the XPath round() function
NumericValue	roundHalfToEven(int scale) Implement the XPath round-to-half-even() function
double	signum() Determine whether the value is negative, zero, or positive
IntegerValue	times(IntegerValue other) Multiply by another integer
ValidationFailure	validateAgainstSubType(BuiltInAtomicType type) This class allows subtypes of xs:integer to be held, as well as xs:integer values.

Methods inherited from class net.sf.saxon.value.IntegerValue

checkBigRange, checkRange, getPrimitiveType, makeIntegerValue, stringToInteger

Methods inherited from class net.sf.saxon.value.NumericValue

equals, getFloatValue, getXPathComparable, isInteger, parseNumber, promote, toString

Methods inherited from class net.sf.saxon.value.AtomicValue

asAtomic, checkPermittedContents, convert, convert, getCardinality, getComponent, getItemType, getLength, getStringValueCS, getTypedValue, getTypeLabel, isNaN, itemAt, iterate, process, setTypeLabel, subsequence

Methods inherited from class net.sf.saxon.value.Value

asItem, asItem, asIterator, asValue, convertJavaObjectToXPath, convertToJava, fromItem, getCanonicalLexicalRepresentation, getIterator, iterate, makeQNameValue, stringToNumber

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Field Detail

MAX_LONG

public static final BigInteger MAX_LONG

MIN_LONG

public static final BigInteger MIN_LONG

MAX_UNSIGNED_LONG

public static final BigInteger MAX_UNSIGNED_LONG

ZERO

public static final BigIntegerValue ZERO

Constructor Detail

BigIntegerValue

public BigIntegerValue(BigInteger value)

Construct an xs:integer value from a Java BigInteger

Parameters:

value - the supplied BigInteger

BigIntegerValue

public BigIntegerValue(BigInteger value,
                       AtomicType typeLabel)

Construct an xs:integer value from a Java BigInteger, supplying a type label. It is the caller's responsibility to ensure that the supplied value conforms with the rules for the specified type.

Parameters:

value - the value of the integer

typeLabel - the type, which must represent a type derived from xs:integer

BigIntegerValue

public BigIntegerValue(long value)

Construct an xs:integer value from a Java long. Note: normally, if the value fits in a long, then an Int64Value should be used. This constructor is largely for internal use, when operations are required that require two integers to use the same implementation class to be used.

Parameters:

value - the supplied Java long

Method Detail

copyAsSubType

public AtomicValue copyAsSubType(AtomicType typeLabel)

Create a copy of this atomic value, with a different type label

Specified by:

copyAsSubType in class AtomicValue

Parameters:

typeLabel - the type label of the new copy. The caller is responsible for checking that the value actually conforms to this type.

Returns:

the copied value

convertToSubType

public ValidationFailure convertToSubType(BuiltInAtomicType type,
                                          boolean validate)

This class allows subtypes of xs:integer to be held, as well as xs:integer values. This method sets the required type label. Note that this method modifies the value in situ.

Specified by:

convertToSubType in class IntegerValue

Parameters:

type - the subtype of integer required

validate - true if validation is required, false if the caller warrants that the value is valid for the subtype

Returns:

null if the operation succeeds, or a ValidationException if the value is out of range

validateAgainstSubType

public ValidationFailure validateAgainstSubType(BuiltInAtomicType type)

This class allows subtypes of xs:integer to be held, as well as xs:integer values. This method checks that the value is valid against the rules for a given subtype.

Specified by:

validateAgainstSubType in class IntegerValue

Parameters:

type - the subtype of integer required

Returns:

null if the operation succeeds, or a ValidationException if the value is out of range

hashCode

public int hashCode()

Get the hashCode. This must conform to the rules for other NumericValue hashcodes

Specified by:

hashCode in class NumericValue

Returns:

the hash code of the numeric value

See Also:

NumericValue.hashCode()

longValue

public long longValue()

Get the value as a long

Overrides:

longValue in class NumericValue

Returns:

the value of the xs:integer, as a Java long

asBigInteger

public BigInteger asBigInteger()

Get the value as a BigInteger

Specified by:

asBigInteger in class IntegerValue

Returns:

the value of the xs:integer as a Java BigInteger

isWithinLongRange

public boolean isWithinLongRange()

Test whether the value is within the range that can be held in a 64-bit signed integer

Returns:

true if the value is within range for a long

asDecimal

public BigDecimal asDecimal()

Convert the value to a BigDecimal

Returns:

the resulting BigDecimal

effectiveBooleanValue

public boolean effectiveBooleanValue()

Return the effective boolean value of this integer

Overrides:

effectiveBooleanValue in class AtomicValue

Returns:

false if the integer is zero, otherwise true

compareTo

public int compareTo(Object other)

Compare the value to another numeric value

Specified by:

compareTo in interface Comparable

Overrides:

compareTo in class NumericValue

Parameters:

other - the numeric value to be compared to this value

Returns:

-1 if this value is less than the other, 0 if they are equal, +1 if this value is greater

compareTo

public int compareTo(long other)

Compare the value to a long

Specified by:

compareTo in class NumericValue

Parameters:

other - the value to be compared with

Returns:

-1 if this is less, 0 if this is equal, +1 if this is greater or if this is NaN

convertPrimitive

public ConversionResult convertPrimitive(BuiltInAtomicType requiredType,
                                         boolean validate,
                                         XPathContext context)

Convert to target data type

Parameters:

requiredType - identifies the required atomic type

context - the XPath dynamic evaluation context

validate - true if validation is required. If set to false, the caller guarantees that the value is valid for the target data type, and that further validation is therefore not required. Note that a validation failure may be reported even if validation was not requested.

Returns:

an AtomicValue, a value of the required type; or an ErrorValue

getStringValue

public String getStringValue()

Get the value as a String

Specified by:

getStringValue in interface Item

Specified by:

getStringValue in interface ValueRepresentation

Specified by:

getStringValue in class AtomicValue

Returns:

a String representation of the value

See Also:

Item.getStringValueCS()

getDoubleValue

public double getDoubleValue()

Get the numeric value as a double

Overrides:

getDoubleValue in class NumericValue

Returns:

A double representing this numeric value; NaN if it cannot be converted

getDecimalValue

public BigDecimal getDecimalValue()

Get the numeric value converted to a decimal

Overrides:

getDecimalValue in class NumericValue

Returns:

a decimal representing this numeric value;

negate

public NumericValue negate()

Negate the value

Specified by:

negate in class NumericValue

Returns:

the result of inverting the sign of the value

floor

public NumericValue floor()

Implement the XPath floor() function

Specified by:

floor in class NumericValue

Returns:

the integer value, unchanged

ceiling

public NumericValue ceiling()

Implement the XPath ceiling() function

Specified by:

ceiling in class NumericValue

Returns:

the integer value, unchanged

round

public NumericValue round()

Implement the XPath round() function

Specified by:

round in class NumericValue

Returns:

the integer value, unchanged

roundHalfToEven

public NumericValue roundHalfToEven(int scale)

Implement the XPath round-to-half-even() function

Specified by:

roundHalfToEven in class NumericValue

Parameters:

scale - number of digits required after the decimal point; the value -2 (for example) means round to a multiple of 100

Returns:

if the scale is >=0, return this value unchanged. Otherwise round it to a multiple of 10**-scale

signum

public double signum()

Determine whether the value is negative, zero, or positive

Specified by:

signum in class NumericValue

Returns:

-1 if negative, 0 if zero, +1 if positive, NaN if NaN

isWholeNumber

public boolean isWholeNumber()

Determine whether the value is a whole number, that is, whether it compares equal to some integer

Overrides:

isWholeNumber in class IntegerValue

Returns:

always true for this implementation

plus

public IntegerValue plus(IntegerValue other)

Add another integer

Specified by:

plus in class IntegerValue

Parameters:

other - the other integer

Returns:

the result of the addition

minus

public IntegerValue minus(IntegerValue other)

Subtract another integer

Specified by:

minus in class IntegerValue

Parameters:

other - the other integer

Returns:

the result of the subtraction

times

public IntegerValue times(IntegerValue other)

Multiply by another integer

Specified by:

times in class IntegerValue

Parameters:

other - the other integer

Returns:

the result of the multiplication

div

public NumericValue div(IntegerValue other)
                 throws XPathException

Divide by another integer

Specified by:

div in class IntegerValue

Parameters:

other - the other integer

Returns:

the result of the division

Throws:

XPathException - if the other integer is zero

mod

public IntegerValue mod(IntegerValue other)
                 throws XPathException

Take modulo another integer

Specified by:

mod in class IntegerValue

Parameters:

other - the other integer

Returns:

the result of the modulo operation (the remainder)

Throws:

XPathException - if the other integer is zero

idiv

public IntegerValue idiv(IntegerValue other)
                  throws XPathException

Integer divide by another integer

Specified by:

idiv in class IntegerValue

Parameters:

other - the other integer

Returns:

the result of the integer division

Throws:

XPathException - if the other integer is zero

getSchemaComparable

public Comparable getSchemaComparable()

Get an object that implements XML Schema comparison semantics

Specified by:

getSchemaComparable in class AtomicValue

Returns:

a Comparable that follows XML Schema comparison rules

reduce

public Value reduce()
             throws XPathException

Reduce a value to its simplest form.

Overrides:

reduce in class Value

Returns:

the value in simplified form

Throws:

XPathException

convertToJava

public Object convertToJava(Class target,
                            XPathContext context)
                     throws XPathException

Convert to Java object (for passing to external functions)

Overrides:

convertToJava in class Value

Parameters:

target - The Java class to which conversion is required

context - the XPath dynamic evaluation context

Returns:

the Java object that results from the conversion; always an instance of the target class

Throws:

XPathException - if conversion is not possible, or fails