public class GenericAtomicComparer extends java.lang.Object implements AtomicComparer
Constructor and Description |
---|
GenericAtomicComparer(StringCollator collator,
XPathContext conversionContext)
Create an GenericAtomicComparer
|
Modifier and Type | Method and Description |
---|---|
int |
compareAtomicValues(AtomicValue a,
AtomicValue b)
Compare two AtomicValue objects according to the rules for their data type.
|
boolean |
comparesEqual(AtomicValue a,
AtomicValue b)
Compare two AtomicValue objects for equality according to the rules for their data type.
|
boolean |
equals(java.lang.Object obj) |
StringCollator |
getCollator()
Get the collation used by this AtomicComparer if any
|
XPathContext |
getContext() |
StringCollator |
getStringCollator()
Get the underlying string collator
|
int |
hashCode() |
static AtomicComparer |
makeAtomicComparer(BuiltInAtomicType type0,
BuiltInAtomicType type1,
StringCollator collator,
XPathContext context)
Factory method to make a GenericAtomicComparer for values of known types
|
GenericAtomicComparer |
provideContext(XPathContext context)
Supply the dynamic context in case this is needed for the comparison
|
java.lang.String |
save()
Create a string representation of this AtomicComparer that can be saved in a compiled
package and used to reconstitute the AtomicComparer when the package is reloaded
|
public GenericAtomicComparer(StringCollator collator, XPathContext conversionContext)
collator
- the collation to be usedconversionContext
- a context, used when converting untyped atomic values to the target type.public static AtomicComparer makeAtomicComparer(BuiltInAtomicType type0, BuiltInAtomicType type1, StringCollator collator, XPathContext context)
type0
- primitive type of the first operandtype1
- primitive type of the second operandcollator
- the collation to be used, if any. This is supplied as a SimpleCollation object
which encapsulated both the collation URI and the collation itself.context
- the dynamic contextpublic StringCollator getCollator()
AtomicComparer
getCollator
in interface AtomicComparer
public GenericAtomicComparer provideContext(XPathContext context)
provideContext
in interface AtomicComparer
context
- the dynamic evaluation contextpublic StringCollator getStringCollator()
public int compareAtomicValues(AtomicValue a, AtomicValue b) throws NoDynamicContextException
compareAtomicValues
in interface AtomicComparer
a
- the first object to be compared. It is intended that this should be an instance
of AtomicValue, though this restriction is not enforced. If it is a StringValue, the
collator is used to compare the values, otherwise the value must implement the java.util.Comparable
interface.b
- the second object to be compared. This must be comparable with the first object: for
example, if one is a string, they must both be strings.java.lang.ClassCastException
- if the objects are not comparableNoDynamicContextException
- 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 AtomicComparer
a
- the first object to be compared. If it is a StringValue, the
collator is used to compare the values, otherwise the value must implement the equals() method.b
- the second object to be compared. This must be comparable with the first object: for
example, if one is a string, they must both be strings.java.lang.ClassCastException
- if the objects are not comparableNoDynamicContextException
public XPathContext getContext()
public java.lang.String save()
save
in interface AtomicComparer
public int hashCode()
hashCode
in class java.lang.Object
public boolean equals(java.lang.Object obj)
equals
in class java.lang.Object
Copyright (c) 2004-2018 Saxonica Limited. All rights reserved.