Package net.sf.saxon.expr
Interface ComparisonExpression
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- All Known Implementing Classes:
CompareToConstant
,CompareToIntegerConstant
,CompareToStringConstant
,GeneralComparison
,GeneralComparison20
,GeneralEqualityEE
,SwitchCaseComparison
,ValueComparison
public interface ComparisonExpression
Interface implemented by expressions that perform a comparison
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description boolean
convertsUntypedToOther()
Determine whether untyped atomic values should be converted to the type of the other operandAtomicComparer
getAtomicComparer()
Get the AtomicComparer used to compare atomic values.Operand
getLhs()
Get the left-hand operand of the comparisonExpression
getLhsExpression()
Get the left-hand expressionOperand
getRhs()
Get the right-hand operand of the comparisonExpression
getRhsExpression()
Get the right-hand expressionint
getSingletonOperator()
Get the primitive (singleton) operator used: one of Token.FEQ, Token.FNE, Token.FLT, Token.FGT, Token.FLE, Token.FGEStringCollator
getStringCollator()
Get the StringCollator used to compare string values.
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Method Detail
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getAtomicComparer
AtomicComparer getAtomicComparer()
Get the AtomicComparer used to compare atomic values. This encapsulates any collation that is used- Returns:
- the comparer
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getStringCollator
StringCollator getStringCollator()
Get the StringCollator used to compare string values.- Returns:
- the collator. May return null if the expression will never be used to compare strings
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getSingletonOperator
int getSingletonOperator()
Get the primitive (singleton) operator used: one of Token.FEQ, Token.FNE, Token.FLT, Token.FGT, Token.FLE, Token.FGE- Returns:
- the operator, as defined in class
Token
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getLhs
Operand getLhs()
Get the left-hand operand of the comparison- Returns:
- the first operand
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getRhs
Operand getRhs()
Get the right-hand operand of the comparison- Returns:
- the second operand
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getLhsExpression
Expression getLhsExpression()
Get the left-hand expression- Returns:
- the first operand expression
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getRhsExpression
Expression getRhsExpression()
Get the right-hand expression- Returns:
- the second operand expression
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convertsUntypedToOther
boolean convertsUntypedToOther()
Determine whether untyped atomic values should be converted to the type of the other operand- Returns:
- true if untyped values should be converted to the type of the other operand, false if they should be converted to strings.
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