ch.ethz.mxquery.functions
Class FunctionSignature

java.lang.Object
  ch.ethz.mxquery.functions.FunctionSignature

public class FunctionSignature
extends java.lang.Object

Holds information on the signature (Name, parameters, classification) of an XQuery function

Field Summary

static int	EXTERNAL_FUNCTION
static int	SYSTEM_FUNCTION
static int	USER_DEFINED_FUNCTION

Constructor Summary

FunctionSignature(QName qname, TypeInfo[] parameterType, int type, int exprType, boolean nondeterministic)

Method Summary

FunctionSignature	copy()
boolean	equals(java.lang.Object obj) Checks the equality of Function Signatures.
int	getArity() Returns the number of parameters (=arity) of this function
int	getExpressionCategory() What is the expression type of this function (as in XQUF, XQSF): SIMPLE, UPDATING, SCRIPTING, VACUOUS
QName	getName() Returns the name of this function as qualified QName
TypeInfo[]	getParameterTypes() Returns the type information for each of the parameters
int	hashCode() Computes the hash code of a Function Signature Only the name and number of parameters are considered, since the type of parameters is irrelevant
boolean	isNonDeterministic() Is this a deterministic or non-deterministic functions (as defined in XQuery 1.1)

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

SYSTEM_FUNCTION

public static final int SYSTEM_FUNCTION

See Also:

Constant Field Values

USER_DEFINED_FUNCTION

public static final int USER_DEFINED_FUNCTION

See Also:

Constant Field Values

EXTERNAL_FUNCTION

public static final int EXTERNAL_FUNCTION

See Also:

Constant Field Values

Constructor Detail

FunctionSignature

public FunctionSignature(QName qname,
                         TypeInfo[] parameterType,
                         int type,
                         int exprType,
                         boolean nondeterministic)

Method Detail

equals

public boolean equals(java.lang.Object obj)

Checks the equality of Function Signatures. Function Signatures are equals if they have the same name and number of parameters The type of parameters is irrelevant, as no overloading on parameter types is possible

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Computes the hash code of a Function Signature Only the name and number of parameters are considered, since the type of parameters is irrelevant

Overrides:

hashCode in class java.lang.Object

getName

public QName getName()

Returns the name of this function as qualified QName

Returns:

the name of the function

getArity

public int getArity()

Returns the number of parameters (=arity) of this function

Returns:

The number of parameters

getParameterTypes

public TypeInfo[] getParameterTypes()

Returns the type information for each of the parameters

Returns:

A type information for each parameter

getExpressionCategory

public int getExpressionCategory()

What is the expression type of this function (as in XQUF, XQSF): SIMPLE, UPDATING, SCRIPTING, VACUOUS

Returns:

The expression type of this function

isNonDeterministic

public boolean isNonDeterministic()

Is this a deterministic or non-deterministic functions (as defined in XQuery 1.1)

Returns:

true if the function is non-deterministic

copy

public FunctionSignature copy()