net.sf.saxon.expr
public abstract class Calculator extends java.lang.Object implements java.io.Serializable
Modifier and Type | Field and Description |
---|---|
static Calculator[] |
ANY_ANY
Calculators used for the six operators when the static type information does not allow
a more specific calculator to be chosen
|
static Calculator[] |
DATETIME_DATETIME
Calculators used when both operands are xs:dateTime, xs:date, or xs:time
|
static Calculator[] |
DATETIME_DURATION
Calculators used when the first operand is xs:dateTime, xs:date, or xs:time,
and the second is a duration
|
static Calculator[] |
DECIMAL_DECIMAL |
static Calculator[] |
DECIMAL_DOUBLE
Calculators used when the first operand is a decimal
|
static Calculator[] |
DECIMAL_FLOAT |
static Calculator[] |
DECIMAL_INTEGER |
static int |
DIV |
static Calculator[] |
DOUBLE_DECIMAL |
static Calculator[] |
DOUBLE_DOUBLE
Calculators used when the first operand is a double
|
static Calculator[] |
DOUBLE_FLOAT |
static Calculator[] |
DOUBLE_INTEGER |
static Calculator[] |
DURATION_DATETIME
Calculators used when the second operand is xs:dateTime, xs:date, or xs:time,
and the first is a duration
|
static Calculator[] |
DURATION_DURATION
Calculators used when the both operands are durations
|
static Calculator[] |
DURATION_NUMERIC
Calculators used when the first operand is a duration and the second is numeric
|
static Calculator[] |
FLOAT_DECIMAL |
static Calculator[] |
FLOAT_DOUBLE
Calculators used when the first operand is a float
|
static Calculator[] |
FLOAT_FLOAT |
static Calculator[] |
FLOAT_INTEGER |
static int |
IDIV |
static Calculator[] |
INTEGER_DECIMAL |
static Calculator[] |
INTEGER_DOUBLE
Calculators used when the first operand is an integer
|
static Calculator[] |
INTEGER_FLOAT |
static Calculator[] |
INTEGER_INTEGER |
static int |
MINUS |
static int |
MOD |
static Calculator[] |
NUMERIC_DURATION
Calculators used when the second operand is a duration and the first is numeric
|
static int |
PLUS |
static int |
TIMES |
Constructor and Description |
---|
Calculator() |
Modifier and Type | Method and Description |
---|---|
abstract AtomicValue |
compute(AtomicValue a,
AtomicValue b,
XPathContext c)
Perform an arithmetic operation
|
static Calculator |
getCalculator(int typeA,
int typeB,
int operator,
boolean mustResolve)
Factory method to get a calculator for a given combination of types
|
static java.lang.String |
getCalculatorSetName(int typeA,
int typeB)
Get the name of the calculator set for a given combination of types
|
abstract AtomicType |
getResultType(AtomicType typeA,
AtomicType typeB)
Get the type of the result of the calculator, given arguments types typeA and typeB
|
public static final int PLUS
public static final int MINUS
public static final int TIMES
public static final int DIV
public static final int MOD
public static final int IDIV
public static Calculator[] ANY_ANY
public static Calculator[] DOUBLE_DOUBLE
public static Calculator[] DOUBLE_FLOAT
public static Calculator[] DOUBLE_DECIMAL
public static Calculator[] DOUBLE_INTEGER
public static Calculator[] FLOAT_DOUBLE
public static Calculator[] FLOAT_FLOAT
public static Calculator[] FLOAT_DECIMAL
public static Calculator[] FLOAT_INTEGER
public static Calculator[] DECIMAL_DOUBLE
public static Calculator[] DECIMAL_FLOAT
public static Calculator[] DECIMAL_DECIMAL
public static Calculator[] DECIMAL_INTEGER
public static Calculator[] INTEGER_DOUBLE
public static Calculator[] INTEGER_FLOAT
public static Calculator[] INTEGER_DECIMAL
public static Calculator[] INTEGER_INTEGER
public static Calculator[] DATETIME_DATETIME
public static Calculator[] DATETIME_DURATION
public static Calculator[] DURATION_DATETIME
public static Calculator[] DURATION_DURATION
public static Calculator[] DURATION_NUMERIC
public static Calculator[] NUMERIC_DURATION
public static Calculator getCalculator(int typeA, int typeB, int operator, boolean mustResolve)
typeA
- fingerprint of the primitive type of the first operandtypeB
- fingerprint of the primitive type of the second operandoperator
- the arithmetic operator in usemustResolve
- indicates that a concrete Calculator is required (rather than
an ANY_ANY calculator which needs to be further resolved at run-time)public static java.lang.String getCalculatorSetName(int typeA, int typeB)
typeA
- the fingerprint of the primitive type of the first operandtypeB
- the fingerprint of the primitive type of the second operandpublic abstract AtomicValue compute(AtomicValue a, AtomicValue b, XPathContext c) throws XPathException
a
- the first operand. Must not be null, and must be an instance of the type implied by the
class name.b
- the second operand. Must not be null, and must be an instance of the type implied by the
class name.c
- the XPath dynamic evaluation contextXPathException
- in the event of an arithmetic errorpublic abstract AtomicType getResultType(AtomicType typeA, AtomicType typeB)
typeA
- the type of the first operandtypeB
- the type of the second operand