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java.lang.Objectnet.sf.saxon.expr.ComputedExpression
net.sf.saxon.expr.BinaryExpression
net.sf.saxon.expr.ArithmeticExpression
net.sf.saxon.expr.ArithmeticExpression.DurationAddition
Inner class to handle addition and subtraction of two durations
Nested Class Summary | |
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.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 | |
protected Expression[] |
operands
|
protected int |
operator
|
Fields inherited from class net.sf.saxon.expr.ComputedExpression |
lineNumber, NO_ARGUMENTS, staticProperties |
Constructor Summary | |
ArithmeticExpression.DurationAddition(Expression p1,
int operator,
Expression p2)
|
Method Summary | |
Expression |
analyze(StaticContext env)
Type-check the expression statically. |
int |
computeCardinality()
Determine the static cardinality |
void |
display(int level,
NamePool pool)
Diagnostic print of expression structure |
protected String |
displayOperator()
|
boolean |
equals(Object other)
Is this expression the same as another expression? |
Item |
evaluateItem(XPathContext context)
Evaluate the expression. |
ItemType |
getItemType()
Determine the data type of the expression, if this is known statically |
Expression[] |
getSubExpressions()
Get the immediate subexpressions of this expression |
int |
hashCode()
get HashCode for comparing two expressions. |
protected static boolean |
isCommutative(int operator)
|
Expression |
promote(PromotionOffer offer)
Promote this expression if possible |
void |
setDetails(Expression p1,
int op,
Expression p2)
Identify the two operands and the operator (for use when the default constructor was used) |
Expression |
simplify()
Simplify an expression |
Methods inherited from class net.sf.saxon.expr.ComputedExpression |
computeDependencies, computeSpecialProperties, computeStaticProperties, dynamicError, effectiveBooleanValue, evaluateAsString, getCardinality, getDependencies, getIntrinsicDependencies, getLineNumber, getSpecialProperties, iterate, markTailFunctionCalls, setLineNumber, typeError |
Methods inherited from class java.lang.Object |
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
protected Expression[] operands
protected int operator
Constructor Detail |
public ArithmeticExpression.DurationAddition(Expression p1, int operator, Expression p2)
Method Detail |
public Item evaluateItem(XPathContext context) throws XPathException
evaluateItem
in interface Expression
evaluateItem
in class ArithmeticExpression
XPathException
public Expression analyze(StaticContext env) throws XPathException
analyze
in interface Expression
analyze
in class BinaryExpression
XPathException
public ItemType getItemType()
public void setDetails(Expression p1, int op, Expression p2)
p1
- the left-hand operandop
- the operator, as a token returned by the Tokenizer (e.g. Tokenizer.AND)p2
- the right-hand operandpublic Expression simplify() throws XPathException
simplify
in interface Expression
simplify
in class ComputedExpression
XPathException
- if an error is discovered during expression
rewritingpublic Expression promote(PromotionOffer offer) throws XPathException
promote
in interface Expression
promote
in class ComputedExpression
offer
- details of the offer, for example the offer to move
expressions that don't depend on the context to an outer level in
the containing expression
XPathException
- if any error is detectedpublic Expression[] getSubExpressions()
getSubExpressions
in interface Expression
getSubExpressions
in class ComputedExpression
public int computeCardinality()
computeCardinality
in class ComputedExpression
protected static boolean isCommutative(int operator)
public boolean equals(Object other)
public int hashCode()
public void display(int level, NamePool pool)
level
- indentation level for this expressionprotected String displayOperator()
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