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## net.sf.saxon.value
Class DecimalValue

    java.lang.Object
      net.sf.saxon.value.Value
          net.sf.saxon.value.AtomicValue
              net.sf.saxon.value.NumericValue
                  net.sf.saxon.value.DecimalValue

All Implemented Interfaces:
  Serializable, Comparable, PullEvent, SequenceIterable, GroundedValue, Item, ValueRepresentation, ConversionResult

    public final class DecimalValue

extends NumericValue

A decimal value

See Also:
  Serialized Form

Nested Class Summary
`protected static class` | `DecimalValue.DecimalComparable`

Field Summary
`static BigDecimal` | `BIG_DECIMAL_ONE`
`static BigDecimal` | `BIG_DECIMAL_ONE_MILLION`
`static BigInteger` | `BIG_INTEGER_TEN`
`static int` | `DIVIDE_PRECISION`
`static DecimalValue` | `ONE`
`static DecimalValue` | `ONE_POINT_ONE`
`static DecimalValue` | `THREE`
`static DecimalValue` | `TWO`
`static DecimalValue` | `TWO_POINT_ONE`
`static DecimalValue` | `ZERO`

Fields inherited from class net.sf.saxon.value.AtomicValue
`typeLabel`

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

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

Constructor Summary
`DecimalValue(BigDecimal value)` Constructor supplying a BigDecimal
`DecimalValue(double in)` Constructor supplying a double
`DecimalValue(long in)` Constructor supplying a long integer

Method Summary
`NumericValue` | `abs()` Get the absolute value as defined by the XPath abs() function
`static boolean` | `castableAsDecimal(CharSequence in)` Test whether a string is castable to a decimal value
`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, ConversionRules rules)` Convert to target data type
`AtomicValue` | `copyAsSubType(AtomicType typeLabel)` Create a copy of this atomic value, with a difNferent type label
`static FastStringBuffer` | `decimalToString(BigDecimal value, FastStringBuffer fsb)` Convert a decimal value to a string, using the XPath rules for formatting
`boolean` | `effectiveBooleanValue()` Get the effective boolean value of the value
`NumericValue` | `floor()` Implement the XPath floor() function
`CharSequence` | `getCanonicalLexicalRepresentation()` Get the canonical lexical representation as defined in XML Schema.
`BigDecimal` | `getDecimalValue()` Get the value
`CharSequence` | `getPrimitiveStringValue()` Get the value as a String
`BuiltInAtomicType` | `getPrimitiveType()` Determine the primitive type of the value.
`Comparable` | `getSchemaComparable()` Get an object that implements XML Schema comparison semantics
`int` | `hashCode()` Get the hashCode.
`boolean` | `isIdentical(Value v)` Determine whether two atomic values are identical, as determined by XML Schema rules.
`boolean` | `isWholeNumber()` Determine whether the value is a whole number, that is, whether it compares equal to some integer
`static ConversionResult` | `makeDecimalValue(CharSequence in, boolean validate)` Factory method to construct a DecimalValue from a string
`NumericValue` | `negate()` Negate the value
`NumericValue` | `round(int scale)` Implement the XPath round() function
`NumericValue` | `roundHalfToEven(int scale)` Implement the XPath round-half-to-even() function
`double` | `signum()` Determine whether the value is negative, zero, or positive

Methods inherited from class net.sf.saxon.value.NumericValue
`equals, getDoubleValue, getFloatValue, getXPathComparable, isInteger, longValue, parseNumber, toString`

Methods inherited from class net.sf.saxon.value.AtomicValue
`asAtomic, checkPermittedContents, convert, convert, convert, getCardinality, getComponent, getItemType, getLength, getStringValue, getStringValueCS, getTypedValue, getTypeLabel, isNaN, itemAt, iterate, process, setTypeLabel, subsequence`

Methods inherited from class net.sf.saxon.value.Value
`asItem, asItem, asIterator, asValue, convertToJava, fromItem, getIterator, iterate, reduce`

Methods inherited from class java.lang.Object
`clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

Field Detail

### DIVIDE_PRECISION

    public static final int DIVIDE_PRECISION

See Also:
  Constant Field Values

### BIG_DECIMAL_ONE

    public static final BigDecimal BIG_DECIMAL_ONE

### BIG_INTEGER_TEN

    public static final BigInteger BIG_INTEGER_TEN

### BIG_DECIMAL_ONE_MILLION

    public static final BigDecimal BIG_DECIMAL_ONE_MILLION

### ZERO

    public static final DecimalValue ZERO

### ONE

    public static final DecimalValue ONE

### ONE_POINT_ONE

    public static final DecimalValue ONE_POINT_ONE

### TWO

    public static final DecimalValue TWO

### TWO_POINT_ONE

    public static final DecimalValue TWO_POINT_ONE

### THREE

    public static final DecimalValue THREE

Constructor Detail

### DecimalValue

    public DecimalValue(BigDecimal value)

  Constructor supplying a BigDecimal

  Parameters:
    `value` - the value of the DecimalValue

### DecimalValue

    public DecimalValue(double in)
                 throws ValidationException

  Constructor supplying a double

  Parameters:
    `in` - the value of the DecimalValue
  Throws:
    `ValidationException`

### DecimalValue

    public DecimalValue(long in)

  Constructor supplying a long integer

  Parameters:
    `in` - the value of the DecimalValue

Method Detail

### makeDecimalValue

    public static ConversionResult makeDecimalValue(CharSequence in,
                                                    boolean validate)

  Factory method to construct a DecimalValue from a string

  Parameters:
    `in` - the value of the DecimalValue
    `validate` - true if validation is required; false if the caller knows that the value is valid
  Returns:
    the required DecimalValue if the input is valid, or a ValidationFailure encapsulating the error message if not.

### castableAsDecimal

    public static boolean castableAsDecimal(CharSequence in)

  Test whether a string is castable to a decimal value

  Parameters:
    `in` - the string to be tested
  Returns:
    true if the string has the correct format for a decimal

### copyAsSubType

    public AtomicValue copyAsSubType(AtomicType typeLabel)

  Create a copy of this atomic value, with a difNferent 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

### getPrimitiveType

    public BuiltInAtomicType getPrimitiveType()

  Determine the primitive type of the value. This delivers the same answer as getItemType().getPrimitiveItemType(). The primitive types are the 19 primitive types of XML Schema, plus xs:integer, xs:dayTimeDuration and xs:yearMonthDuration, and xs:untypedAtomic. For external objects, the result is AnyAtomicType.

  Specified by:
    `getPrimitiveType` in class `AtomicValue`
  Returns:
    the primitive type

### getDecimalValue

    public BigDecimal getDecimalValue()

  Get the value

  Overrides:
    `getDecimalValue` in class `NumericValue`
  Returns:
    a decimal representing this numeric value;

### 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()`

### effectiveBooleanValue

    public boolean effectiveBooleanValue()

  Description copied from class: `AtomicValue`
  Get the effective boolean value of the value

  Overrides:
    `effectiveBooleanValue` in class `AtomicValue`
  Returns:
    true, unless the value is boolean false, numeric zero, or zero-length string

### convertPrimitive

    public ConversionResult convertPrimitive(BuiltInAtomicType requiredType,
                                             boolean validate,
                                             ConversionRules rules)

  Convert to target data type

  Specified by:
    `convertPrimitive` in class `AtomicValue`
  Parameters:
    `requiredType` - the required atomic type. This must either be a primitive type, or a built-in type derived from the same primitive type as this atomic value.
    `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:
    the result of the conversion, if successful. If unsuccessful, the value returned will be a ValidationFailure. The caller must check for this condition. No exception is thrown, instead the exception information will be encapsulated within the ValidationFailure.

### getCanonicalLexicalRepresentation

    public CharSequence getCanonicalLexicalRepresentation()

  Get the canonical lexical representation as defined in XML Schema. This is not always the same as the result of casting to a string according to the XPath rules. For xs:decimal, the canonical representation always contains a decimal point.

  Overrides:
    `getCanonicalLexicalRepresentation` in class `Value`
  Returns:
    the canonical lexical representation if defined in XML Schema; otherwise, the result of casting to string according to the XPath 2.0 rules

### getPrimitiveStringValue

    public CharSequence getPrimitiveStringValue()

  Get the value as a String

  Specified by:
    `getPrimitiveStringValue` in class `AtomicValue`
  Returns:
    a String representation of the value

### decimalToString

    public static FastStringBuffer decimalToString(BigDecimal value,
                                                   FastStringBuffer fsb)

  Convert a decimal value to a string, using the XPath rules for formatting

  Parameters:
    `value` - the decimal value to be converted
    `fsb` - the FastStringBuffer to which the value is to be appended
  Returns:
    the supplied FastStringBuffer, suitably populated

### negate

    public NumericValue negate()

  Negate the value

  Specified by:
    `negate` in class `NumericValue`
  Returns:
    a value, of the same type as the original, with its sign inverted

### floor

    public NumericValue floor()

  Implement the XPath floor() function

  Specified by:
    `floor` in class `NumericValue`
  Returns:
    a value, of the same type as that supplied, rounded towards minus infinity

### ceiling

    public NumericValue ceiling()

  Implement the XPath ceiling() function

  Specified by:
    `ceiling` in class `NumericValue`
  Returns:
    a value, of the same type as that supplied, rounded towards plus infinity

### round

    public NumericValue round(int scale)

  Implement the XPath round() function

  Specified by:
    `round` in class `NumericValue`
  Returns:
    a value, of the same type as that supplied, rounded towards the nearest whole number (0.5 rounded up)

### roundHalfToEven

    public NumericValue roundHalfToEven(int scale)

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

  Specified by:
    `roundHalfToEven` in class `NumericValue`
  Parameters:
    `scale` - the decimal position for rounding: e.g. 2 rounds to a multiple of 0.01, while -2 rounds to a multiple of 100
  Returns:
    a value, of the same type as the original, rounded towards the nearest multiple of 10**(-scale), with rounding towards the nearest even number if two values are equally near

### 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

  Specified by:
    `isWholeNumber` in class `NumericValue`
  Returns:
    true if the value is a whole number

### abs

    public NumericValue abs()

  Get the absolute value as defined by the XPath abs() function

  Specified by:
    `abs` in class `NumericValue`
  Returns:
    the absolute value
  Since:
    9.2

### 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 other numeric value
  Returns:
    -1 if this one is the lower, 0 if they are numerically equal, +1 if this one is the higher, or if either value is NaN. Where NaN values are involved, they should be handled by the caller before invoking this method.

### 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

### 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

### isIdentical

    public boolean isIdentical(Value v)

  Determine whether two atomic values are identical, as determined by XML Schema rules. This is a stronger test than equality (even schema-equality); for example two dateTime values are not identical unless they are in the same timezone.

  Note that even this check ignores the type annotation of the value. The integer 3 and the short 3 are considered identical, even though they are not fully interchangeable. "Identical" means the same point in the value space, regardless of type annotation.

  NaN is identical to itself.

  Overrides:
    `isIdentical` in class `AtomicValue`
  Parameters:
    `v` - the other value to be compared with this one
  Returns:
    true if the two values are identical, false otherwise.

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Copyright (c) 2004-2010 Saxonica Limited. All rights reserved.