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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
|
Fields inherited from interface net.sf.saxon.expr.Expression |
EVALUATE_METHOD, ITERATE_METHOD, PROCESS_METHOD |
Constructor Summary | |
DoubleValue(java.lang.CharSequence val)
Constructor supplying a string |
|
DoubleValue(double value)
Constructor supplying a double |
Method Summary | |
NumericValue |
arithmetic(int operator,
NumericValue other,
XPathContext context)
Evaluate a binary arithmetic operator. |
NumericValue |
ceiling()
Implement the XPath ceiling() function |
AtomicValue |
convertPrimitive(BuiltInAtomicType requiredType,
boolean validate)
Convert to target data type |
java.lang.Object |
convertToJava(java.lang.Class target,
XPathContext context)
Convert to Java object (for passing to external functions) |
boolean |
effectiveBooleanValue(XPathContext context)
Get the effective boolean value |
NumericValue |
floor()
Implement the XPath floor() function |
double |
getDoubleValue()
Return this numeric value as a double |
ItemType |
getItemType()
Determine the data type of the expression |
java.lang.String |
getStringValue()
Convert the double to a string according to the XPath 2.0 rules |
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 |
double |
signum()
Determine whether the value is negative, zero, or positive |
Methods inherited from class net.sf.saxon.value.NumericValue |
compareTo, equals, isInteger, longValue, parseNumber, promote, toString |
Methods inherited from class net.sf.saxon.value.AtomicValue |
checkPermittedContents, convert, convert, display, evaluateAsString, evaluateItem, getCardinality, getComponent, getImplementationMethod, getLength, getPrimitiveValue, getStringValueCS, getTypedValue, hasBuiltInType, iterate, process |
Methods inherited from class net.sf.saxon.value.Value |
analyze, asItem, asValue, collapseWhitespace, convert, convertJavaObjectToXPath, getDependencies, getIterator, getParentExpression, getSpecialProperties, itemAt, iterateSubExpressions, makeQNameValue, normalizeWhitespace, promote, simplify, 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(java.lang.CharSequence val) throws ValidationException
ValidationException
- if the string does not have the correct lexical form for a double.
Note that the error will contain no error code or context information.public DoubleValue(double value)
value
- the value of the NumericValueMethod Detail |
public double getDoubleValue()
getDoubleValue
in class NumericValue
public int hashCode()
hashCode
in class NumericValue
NumericValue.hashCode()
public boolean isNaN()
isNaN
in class NumericValue
public boolean effectiveBooleanValue(XPathContext context)
effectiveBooleanValue
in interface Expression
effectiveBooleanValue
in class AtomicValue
context
-
public AtomicValue convertPrimitive(BuiltInAtomicType requiredType, boolean validate)
convertPrimitive
in class AtomicValue
requiredType
- an integer identifying the required atomic typevalidate
- 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.
public java.lang.String getStringValue()
getStringValue
in interface Item
getStringValue
in class AtomicValue
public ItemType getItemType()
getItemType
in interface Expression
getItemType
in class Value
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 double signum()
signum
in class NumericValue
public boolean isWholeNumber()
isWholeNumber
in class NumericValue
public NumericValue arithmetic(int operator, NumericValue other, XPathContext context) 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 java.lang.Object convertToJava(java.lang.Class target, XPathContext context) throws XPathException
convertToJava
in class Value
XPathException
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