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java.lang.Objectnet.sf.saxon.expr.sort.TextComparer
public class TextComparer
A Comparer used for comparing sort keys when data-type="text". The items to be compared are converted to strings, and the strings are then compared using an underlying collator
| Constructor Summary | |
|---|---|
TextComparer(AtomicComparer baseComparer)
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| Method Summary | |
|---|---|
int |
compareAtomicValues(AtomicValue a,
AtomicValue b)
Compare two Items by converting them to strings and comparing the string values. |
boolean |
comparesEqual(AtomicValue a,
AtomicValue b)
Compare two AtomicValue objects for equality according to the rules for their data type. |
AtomicComparer |
getBaseComparer()
Get the underlying comparer (which doesn't do conversion to string) |
StringCollator |
getCollator()
Get the collation used by this AtomicComparer if any |
ComparisonKey |
getComparisonKey(AtomicValue a)
Get a comparison key for an object. |
AtomicComparer |
provideContext(XPathContext context)
Supply the dynamic context in case this is needed for the comparison |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
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public TextComparer(AtomicComparer baseComparer)
| Method Detail |
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public AtomicComparer getBaseComparer()
public StringCollator getCollator()
AtomicComparer
getCollator in interface AtomicComparerpublic AtomicComparer provideContext(XPathContext context)
provideContext in interface AtomicComparercontext - the dynamic evaluation context
NoDynamicContextException - if the context is an "early evaluation" (compile-time) context
public int compareAtomicValues(AtomicValue a,
AtomicValue b)
throws ClassCastException,
NoDynamicContextException
compareAtomicValues in interface AtomicComparera - the first Item to be compared.b - the second Item to be compared.
ClassCastException - if the objects are not Items, or are items that cannot be convered
to strings (e.g. QNames)
NoDynamicContextException - if this comparer required access to dynamic context information,
notably the implicit timezone, and this information is not available. In general this happens if a
context-dependent comparison is attempted at compile-time, and it signals the compiler to generate
code that tries again at run-time.
public boolean comparesEqual(AtomicValue a,
AtomicValue b)
throws NoDynamicContextException
comparesEqual in interface AtomicComparera - the first object to be compared.b - the second object to be compared.
ClassCastException - if the objects are not comparable
NoDynamicContextException
public ComparisonKey getComparisonKey(AtomicValue a)
throws NoDynamicContextException
getComparisonKey in interface AtomicComparerNoDynamicContextException
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