Package net.sf.saxon.functions.hof
The package com.saxonica.functions.hof contains code to support higher-order functions.
Higher-order functions are supported in XSLT 3.0, XPath 3.1, and XQuery 3.1, in Saxon-PE and Saxon-EE only.
The package includes code to support both the core facilities of dynamic creation and invocation of function
objects, and also specific higher-order functions defined in the Functions and Operators library
such as fn:filter, fn:for-each and fn:fold-left.
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Class Summary Class Description AtomicConstructorFunction A function item representing a constructor function for an atomic type.CallableWithBoundFocus A Callable that wraps another Callable and a Dynamic Context, in effect acting as a closure that executes the original callable with a saved context.CoercedFunction A function item obtained by coercing a supplied function; this adds a wrapper to perform dynamic type checking of the arguments in any call, and type checking of the result.CurriedFunction A function obtained by currying another function, that is, the result of calling fn:partial-applyFilterFn This class implements the function fn:filter(), which is a standard function in XQuery 3.0FoldLeftFn This class implements the function fn:fold-left(), which is a standard function in XPath 3.0FoldLeftFn.FoldLeftFold FoldRightFn This class implements the function fn:fold-right(), which is a standard function in XQuery 1.1ForEachFn This class implements the function fn:for-each() (formerly fn:map), which is a standard function in XQuery 3.0ForEachPairFn This class implements the function fn:for-each-pair() (formerly fn:map-pairs()), which is a standard function in XQuery 3.0FunctionArity This class implements the function function-arity(), which is a standard function in XPath 3.0FunctionLiteral A FunctionLiteral is a wrapper around a FunctionItem; it is an expression, whose value is the function that it wraps.FunctionLookup This class supports the function-lookup() function in XPath 3.0.FunctionLookup.FunctionLookupExportAgent FunctionName This class implements the function function-name(), which is a standard function in XPath 3.0FunctionSequenceCoercer An FunctionSequenceCoercer is an expression that performs function coercion on a sequence of function items: it takes a sequence of supplied items as input, and wraps each one in a CoercedFunction value, which dynamically converts the supplied arguments to the required type, and converts the result in the opposite direction, or throws a type error if conversion is not possible.FunctionSequenceCoercer.Coercer LoadXqueryModule This class implements the function load-xquery-module(), which is a standard function in XPath 3.1.PartialApply This expression class implements the operation of currying (or performing partial application) of a function.RandomNumberGenerator This class implements the function random-number-generator(), which is a standard function in XPath 3.1Sort_3 This class implements the function fn:sort#2, which is a higher-order function in XPath 3.1 available only in Saxon-PE and aboveSystemFunctionWithBoundContextItem A Callable that wraps another Callable and a Dynamic Context, in effect acting as a closure that executes the original callable with a saved context.UnresolvedXQueryFunctionItem UserFunctionReference A UserFunctionReference is an expression in the form local:f#1 where local:f is a user-defined function.UserFunctionReference.BoundUserFunction A BoundUserFunction represents a user-defined function seen as a component.