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java.lang.Objectnet.sf.saxon.value.Value
net.sf.saxon.value.AtomicValue
net.sf.saxon.value.NumericValue
net.sf.saxon.value.DoubleValue
A numeric (double precision floating point) value
Field Summary | |
static DoubleValue |
NaN
|
static DoubleValue |
ZERO
|
Constructor Summary | |
DoubleValue(double value)
Constructor supplying a double |
Method Summary | |
NumericValue |
arithmetic(int operator,
NumericValue other)
Evaluate a binary arithmetic operator. |
double |
asDouble()
Get the numeric value as a double |
NumericValue |
ceiling()
Implement the XPath ceiling() function |
int |
conversionPreference(java.lang.Class required)
Get conversion preference for this value to a Java class. |
AtomicValue |
convert(int requiredType)
Convert to target data type |
java.lang.Object |
convertToJava(java.lang.Class target)
Convert to Java object (for passing to external functions) |
void |
display(int level,
NamePool pool)
Diagnostic print of expression structure |
boolean |
effectiveBooleanValue(XPathContext context)
Get the effective boolean value of the value |
NumericValue |
floor()
Implement the XPath floor() function |
ItemType |
getItemType()
Determine the data type of the expression |
java.lang.String |
getStringValue()
Get the value of the item as a string |
double |
getValue()
Get the value |
int |
hashCode()
Get the hashCode. |
boolean |
isNaN()
Test whether the value is the double/float value NaN |
boolean |
isWholeNumber()
Determine whether the value is a whole number, that is, whether it compares equal to some integer |
NumericValue |
negate()
Negate the value |
NumericValue |
round()
Implement the XPath round() function |
NumericValue |
roundToHalfEven(int scale)
Implement the XPath round-to-half-even() function |
Methods inherited from class net.sf.saxon.value.NumericValue |
asLong, compareTo, equals, promote, toString |
Methods inherited from class net.sf.saxon.value.AtomicValue |
convert, convert, evaluateAsString, evaluateItem, getCardinality, getComponent, getPrimitiveValue, getTypedValue, iterate |
Methods inherited from class net.sf.saxon.value.Value |
analyze, asItem, asValue, collapseWhitespace, getDependencies, getSpecialProperties, getSubExpressions, inverse, normalizeWhitespace, promote, simplify, stringToInteger, stringToNumber, trimWhitespace |
Methods inherited from class java.lang.Object |
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Field Detail |
public static final DoubleValue ZERO
public static final DoubleValue NaN
Constructor Detail |
public DoubleValue(double value)
value
- the value of the NumericValueMethod Detail |
public double getValue()
public double asDouble()
NumericValue
asDouble
in class NumericValue
public int hashCode()
hashCode
in class NumericValue
NumericValue.hashCode()
public boolean isNaN()
isNaN
in class NumericValue
public boolean effectiveBooleanValue(XPathContext context)
AtomicValue
effectiveBooleanValue
in interface Expression
effectiveBooleanValue
in class AtomicValue
context
- the evaluation context (not used in this implementation)
public AtomicValue convert(int requiredType) throws XPathException
convert
in class AtomicValue
requiredType
- an integer identifying the required atomic type
XPathException
- if the conversion is not possiblepublic java.lang.String getStringValue()
Item
public ItemType getItemType()
public NumericValue negate()
negate
in class NumericValue
public NumericValue floor()
floor
in class NumericValue
public NumericValue ceiling()
ceiling
in class NumericValue
public NumericValue round()
round
in class NumericValue
public NumericValue roundToHalfEven(int scale)
roundToHalfEven
in class NumericValue
scale
- the decimal position for rounding: e.g. 2 rounds to a
multiple of 0.01, while -2 rounds to a multiple of 100
public boolean isWholeNumber()
isWholeNumber
in class NumericValue
public NumericValue arithmetic(int operator, NumericValue other) throws XPathException
arithmetic
in class NumericValue
operator
- the binary arithmetic operation to be performed. Uses
the constants defined in the Tokenizer classother
- the other operand
XPathException
- if an arithmetic error occursTokenizer
public int conversionPreference(java.lang.Class required)
conversionPreference
in class AtomicValue
public java.lang.Object convertToJava(java.lang.Class target) throws XPathException
convertToJava
in class AtomicValue
XPathException
public void display(int level, NamePool pool)
level
- indentation level for this expression
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