net.sf.saxon.value
Class Int64Value

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.Int64Value

All Implemented Interfaces:

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

public final class Int64Value
extends IntegerValue

An integer value: note this is a subtype of decimal in XML Schema, not a primitive type. This class supports integer values in the range permitted by a Java "long", and also supports the built-in subtypes of xs:integer.

See Also:

Serialized Form

Field Summary

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

MAX_LONG, MIN_LONG, MINUS_ONE, PLUS_ONE, SMALL_INTEGERS, ZERO

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

Int64Value(long value)
Constructor supplying a long

Int64Value(long val, BuiltInAtomicType type, boolean check)
Constructor for a subtype, supplying a long and a type label.

Method Summary

BigInteger	asBigInteger() Get the value as a BigInteger
NumericValue	ceiling() Implement the XPath ceiling() function
boolean	checkRange(BuiltInAtomicType type) This class allows subtypes of xs:integer to be held, as well as xs:integer values.
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 subtype, boolean validate) Convert the value to a subtype of xs:integer
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
float	getFloatValue() Get the numeric value converted to a float
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
long	longValue() Get the value
static Int64Value	makeDerived(long val, AtomicType type) Factory method to create a derived value, with no checking of the value against the derived type
static Int64Value	makeIntegerValue(long value) Factory method: allows Int64Value objects to be reused.
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
NumericValue	round() Implement the XPath round() function
NumericValue	roundHalfToEven(int scale) Implement the XPath round-to-half-even() function
void	setSubType(AtomicType type) This class allows subtypes of xs:integer to be held, as well as xs:integer values.
double	signum() Determine whether the value is negative, zero, or positive
static Int64Value	signum(long val) Factory method returning the integer -1, 0, or +1 according as the argument 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, isWholeNumber, makeIntegerValue, stringToInteger

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

equals, 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, reduce, stringToNumber

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Int64Value

public Int64Value(long value)

Constructor supplying a long

Parameters:

value - the value of the IntegerValue

Int64Value

public Int64Value(long val,
                  BuiltInAtomicType type,
                  boolean check)
           throws XPathException

Constructor for a subtype, supplying a long and a type label.

Parameters:

val - The supplied value, as an integer

type - the required item type, a subtype of xs:integer

check - Set to true if the method is required to check that the value is in range; false if the caller can guarantee that the value has already been checked.

Throws:

XPathException - if the supplied value is out of range for the target type

Method Detail

makeIntegerValue

public static Int64Value makeIntegerValue(long value)

Factory method: allows Int64Value objects to be reused. Note that a value obtained using this method must not be modified to set a type label, because the value is in general shared.

Parameters:

value - the integer value

Returns:

an Int64Value with this integer value

makeDerived

public static Int64Value makeDerived(long val,
                                     AtomicType type)

Factory method to create a derived value, with no checking of the value against the derived type

Parameters:

val - the integer value

type - the subtype of xs:integer

Returns:

the constructed value

signum

public static Int64Value signum(long val)

Factory method returning the integer -1, 0, or +1 according as the argument is negative, zero, or positive

Parameters:

val - the value to be tested

Returns:

the Int64Value representing -1, 0, or +1

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 subtype,
                                          boolean validate)

Convert the value to a subtype of xs:integer

Specified by:

convertToSubType in class IntegerValue

Parameters:

subtype - the target subtype

validate - true if validation is required; false if the caller already knows that the value is valid

Returns:

null if the conversion succeeds; a ValidationFailure describing the failure if it fails. Note that the exception is returned, not thrown.

validateAgainstSubType

public ValidationFailure validateAgainstSubType(BuiltInAtomicType type)

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:

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

setSubType

public void setSubType(AtomicType type)

This class allows subtypes of xs:integer to be held, as well as xs:integer values. This method sets the required type label. It is the caller's responsibility to check that the value is within range.

Parameters:

type - the type label to be assigned

checkRange

public boolean checkRange(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 within range, and also sets the type label.

Parameters:

type - the subtype of integer required

Returns:

true if successful, false if value is out of range for the subtype

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

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

Overrides:

longValue in class NumericValue

Returns:

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

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 - an integer identifying the required atomic type

context - 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

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

getFloatValue

public float getFloatValue()

Get the numeric value converted to a float

Overrides:

getFloatValue in class NumericValue

Returns:

a float 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

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

asBigInteger

public BigInteger asBigInteger()

Get the value as a BigInteger

Specified by:

asBigInteger in class IntegerValue

Returns:

the value, as a BigInteger

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