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java.lang.Objectnet.sf.saxon.expr.ComputedExpression
net.sf.saxon.expr.BinaryExpression
net.sf.saxon.expr.ArithmeticExpression
class ArithmeticExpression
Arithmetic Expression: an expression using one of the operators plus, minus, multiply, div, idiv, mod.
Nested Class Summary | |
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static class |
ArithmeticExpression.DateAndDuration
Inner class to handle addition or subtraction of a Date (or Time, or DateTime) and a Duration |
static class |
ArithmeticExpression.DateDifference
Inner class to handle subtraction of a Date (or Time, or DateTime) from another, to return a Duration |
static class |
ArithmeticExpression.DurationAddition
Inner class to handle addition and subtraction of two durations |
static class |
ArithmeticExpression.DurationDivision
Inner class to handle division of two durations to give a number |
static class |
ArithmeticExpression.DurationMultiplication
Inner class to handle multiplication (or division) of a duration by a number |
static class |
ArithmeticExpression.NumericArithmetic
Inner class to handle numeric arithmetic expressions |
Field Summary |
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Fields inherited from class net.sf.saxon.expr.BinaryExpression |
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operand0, operand1, operator |
Fields inherited from class net.sf.saxon.expr.ComputedExpression |
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locationId, staticProperties |
Fields inherited from interface net.sf.saxon.expr.Expression |
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EVALUATE_METHOD, ITERATE_METHOD, PROCESS_METHOD |
Constructor Summary | |
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ArithmeticExpression(Expression p1,
int operator,
Expression p2)
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Method Summary | |
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Item |
evaluateItem(XPathContext context)
Evaluate the expression. |
ItemType |
getItemType(TypeHierarchy th)
Determine the data type of the expression, if this is known statically |
Expression |
typeCheck(StaticContext env,
ItemType contextItemType)
Type-check the expression statically. |
Methods inherited from class net.sf.saxon.expr.BinaryExpression |
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computeCardinality, computeSpecialProperties, display, displayOperator, equals, getOperands, getOperator, hashCode, isAssociative, isCommutative, isInverse, iterateSubExpressions, optimize, promote, simplify |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public ArithmeticExpression(Expression p1, int operator, Expression p2)
Method Detail |
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public Expression typeCheck(StaticContext env, ItemType contextItemType) throws XPathException
typeCheck
in interface Expression
typeCheck
in class BinaryExpression
env
- the static context of the expressioncontextItemType
- the static type of "." at the point where this expression is invoked.
The parameter is set to null if it is known statically that the context item will be undefined.
If the type of the context item is not known statically, the argument is set to
Type.ITEM_TYPE
StaticError
- if an error is discovered during this phase
(typically a type error)
XPathException
public ItemType getItemType(TypeHierarchy th)
th
-
public Item evaluateItem(XPathContext context) throws XPathException
evaluateItem
in interface Expression
evaluateItem
in class ComputedExpression
context
- The context in which the expression is to be evaluated
XPathException
- if any dynamic error occurs evaluating the
expression
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