public final class DoubleValue extends NumericValue
Modifier and Type | Field and Description |
---|---|
static DoubleValue |
NaN |
(package private) static Pattern |
nonExponentialPattern |
static DoubleValue |
ZERO |
EMPTY_CLASS_ARRAY
EMPTY_VALUE_ARRAY
EVALUATE_METHOD, ITERATE_METHOD, PROCESS_METHOD
Constructor and Description |
---|
DoubleValue(CharSequence val)
Constructor supplying a string
|
DoubleValue(double value)
Constructor supplying a double
|
Modifier and Type | Method and Description |
---|---|
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,
XPathContext context)
Convert to target data type
|
Object |
convertToJava(Class target,
XPathContext context)
Convert to Java object (for passing to external functions)
|
static CharSequence |
doubleToString(double value)
Internal method used for conversion of a double to a string
|
static CharSequence |
doubleToStringOLD(double value,
String javaString)
Internal method used for conversion of a double to a string
|
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(TypeHierarchy th)
Determine the data type of the expression
|
String |
getStringValue()
Convert the double to a string according to the XPath 2.0 rules
|
CharSequence |
getStringValueCS()
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
|
static void |
printInternalForm(double d)
Diagnostic method
|
NumericValue |
round()
Implement the XPath round() function
|
NumericValue |
roundToHalfEven(int scale)
Implement the XPath round-to-half-even() function
|
boolean |
schemaEquals(Value obj)
Compare two values for equality.
|
double |
signum()
Determine whether the value is negative, zero, or positive
|
(package private) static String |
zeros(int n) |
compareTo, equals, isInteger, longValue, parseNumber, promote, toString
checkPermittedContents, convert, convert, display, evaluateAsString, evaluateItem, getCardinality, getComponent, getImplementationMethod, getLength, getPrimitiveValue, getTypedValue, hasBuiltInType, iterate, process
asItem, asIterator, asValue, collapseWhitespace, convert, convertJavaObjectToXPath, getDependencies, getIterator, getParentExpression, getSpecialProperties, itemAt, iterateSubExpressions, makeQNameValue, normalizeWhitespace, optimize, promote, reduce, simplify, stringToNumber, trimWhitespace, typeCheck
public static final DoubleValue ZERO
public static final DoubleValue NaN
static Pattern nonExponentialPattern
public DoubleValue(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 NumericValuepublic 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, XPathContext context)
convertPrimitive
in class AtomicValue
requiredType
- an integer identifying the required atomic typecontext
- 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.public String getStringValue()
getStringValue
in interface Item
getStringValue
in interface ValueRepresentation
getStringValue
in class AtomicValue
Item.getStringValueCS()
public CharSequence getStringValueCS()
getStringValueCS
in interface Item
getStringValueCS
in class AtomicValue
Item.getStringValue()
public static CharSequence doubleToString(double value)
value
- the actual valuepublic static CharSequence doubleToStringOLD(double value, String javaString)
value
- the actual valuejavaString
- the result of converting the double to a string using the Java conventions.
This value is adjusted as necessary to cater for the differences between the Java and XPath rules.static String zeros(int n)
public ItemType getItemType(TypeHierarchy th)
getItemType
in interface Expression
getItemType
in class Value
th
- 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 100public 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 operandXPathException
- if an arithmetic error occursTokenizer
public boolean schemaEquals(Value obj)
schemaEquals
in class AtomicValue
public Object convertToJava(Class target, XPathContext context) throws XPathException
convertToJava
in class Value
XPathException
public static void printInternalForm(double d)