java.lang.Object
- net.sf.saxon.functions.registry.BuiltInFunctionSet.Entry

Enclosing class:

BuiltInFunctionSet
```
public static class BuiltInFunctionSet.Entry
extends java.lang.Object
```
An entry in the table describing the properties of a function

Field Summary

Fields
Modifier and Type	Field	Description
`SequenceType[]`	`argumentTypes`	An array holding the types of the arguments to the function
`int`	`arity`	The arity of the function
`int`	`cardinality`	The cardinality of the result of the function
`BuiltInFunctionSet`	`functionSet`	The function set in which this function is defined
`java.lang.Class<? extends SystemFunction>`	`implementationClass`	The class containing the implementation of this function (always a subclass of SystemFunction)
`ItemType`	`itemType`	The item type of the result of the function
`StructuredQName`	`name`	The name of the function as a QName
`OptionsParameter`	`optionDetails`	For options parameters, details of the accepted options, their defaults, and required type
`int`	`properties`	Any additional properties.
`Sequence[]`	`resultIfEmpty`	An array holding, for each declared argument, the value that is to be returned if an empty sequence as the value of this argument allows the result to be determined irrespective of the values of the other arguments; null if there is no such calculation possible
`OperandUsage[]`	`usage`	The syntactic context of each argument for the purposes of streamability analysis

Constructor Summary

Constructors
Constructor Description

Entry()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`BuiltInFunctionSet.Entry`	`arg(int a, ItemType type, int options, Sequence resultIfEmpty)`	Add information to a function entry about the argument types of the function
`BuiltInFunctionSet.Entry`	`setOptionDetails(OptionsParameter details)`	Add details for options parameters (only applies to one argument, the function is expected to know which)

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - name
```
public StructuredQName name
```
    The name of the function as a QName
  - implementationClass
```
public java.lang.Class<? extends SystemFunction> implementationClass
```
    The class containing the implementation of this function (always a subclass of SystemFunction)
  - functionSet
```
public BuiltInFunctionSet functionSet
```
    The function set in which this function is defined
  - arity
```
public int arity
```
    The arity of the function
  - itemType
```
public ItemType itemType
```
    The item type of the result of the function
  - cardinality
```
public int cardinality
```
    The cardinality of the result of the function
  - usage
```
public OperandUsage[] usage
```
    The syntactic context of each argument for the purposes of streamability analysis
  - argumentTypes
```
public SequenceType[] argumentTypes
```
    An array holding the types of the arguments to the function
  - resultIfEmpty
```
public Sequence[] resultIfEmpty
```
    An array holding, for each declared argument, the value that is to be returned if an empty sequence as the value of this argument allows the result to be determined irrespective of the values of the other arguments; null if there is no such calculation possible
  - properties
```
public int properties
```
    Any additional properties. Various bit settings are defined: for example SAME_AS_FIRST_ARGUMENT indicates that the result type is the same as the type of the first argument
  - optionDetails
```
public OptionsParameter optionDetails
```
    For options parameters, details of the accepted options, their defaults, and required type
- Constructor Detail
  - Entry
```
public Entry()
```
- Method Detail
  - arg
```
public BuiltInFunctionSet.Entry arg(int a,
                                    ItemType type,
                                    int options,
                                    Sequence resultIfEmpty)
```
    Add information to a function entry about the argument types of the function
    
    Parameters:
    
    a - the position of the argument, counting from zero
    
    type - the item type of the argument
    
    options - the cardinality and usage of the argument
    
    resultIfEmpty - the value returned by the function if an empty sequence appears as the value of this argument, in the case when this result is unaffected by any other arguments. Supply null if this does not apply.
    
    Returns:
    
    this entry (to allow chaining)
  - setOptionDetails
```
public BuiltInFunctionSet.Entry setOptionDetails(OptionsParameter details)
```
    Add details for options parameters (only applies to one argument, the function is expected to know which)

Class BuiltInFunctionSet.Entry

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

name

implementationClass

functionSet

arity

itemType

cardinality

usage

argumentTypes

resultIfEmpty

properties

optionDetails

Constructor Detail

Entry

Method Detail

arg

setOptionDetails