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com.ibm.websphere.query.base
Class Function

java.lang.Object
  com.ibm.websphere.query.base.Function

All Implemented Interfaces:

IFunction, IFunctionElement, ILeftOperand, IOrderByElement, IRightOperand, IStringBuilder, java.io.Serializable

public class Function
extends java.lang.Object
implements IFunction

The Function class represents a function in the query framework. It can be used in a predicate, an order by, and wherever appropriate.

This class contains a name and a vector of elements to describe a typical function. For example, a simple function "upper(name)" is described with an instance of Function class whose name = "upper" and function element = Attribute("name")

See Also:

Serialized Form

Constructor Summary

Function()           Default contructor.

Function(java.lang.String newName)           Creates a new Function instance with the given name.

Function(java.lang.String newName, IFunctionElement newFunctionElement)           Creates a new Function instance with the given name, and function element.

Function(java.lang.String newName, IFunctionElement[] newFunctionElements)           Creates a new Function instance with the given name, and an array of function elements.

 

Method Summary
void	addFunctionElement(IFunctionElement functionElement)           Adds a function element the function element vector.
java.lang.String	buildString(ISelectQueryCallback builder)           Builds a query string for the function.
void	buildString(ISelectQueryCallback builder, java.lang.StringBuffer sb)
boolean	equals(java.lang.Object o)           Tests for equality with the given object.
int	getDataType()           Return the data type of the value.
IFunctionElement[]	getFunctionElements()           Return the function elements as an array.
java.lang.String	getName()           Return the function name.
int	hashCode()           Computes a hash code for the function.
void	setFunctionElement(IFunctionElement newFunctionElement)           Sets the function element of the condition.
void	setFunctionElements(IFunctionElement[] newFunctionElements)           Sets the function elements of the condition.
void	setName(java.lang.String newName)           Sets the function name.

 

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

Function

public Function()

Default contructor.

Function

public Function(java.lang.String newName)

Creates a new Function instance with the given name.

Function

public Function(java.lang.String newName,
                IFunctionElement[] newFunctionElements)

Creates a new Function instance with the given name, and an array of function elements.

Function

public Function(java.lang.String newName,
                IFunctionElement newFunctionElement)

Creates a new Function instance with the given name, and function element.

Method Detail

addFunctionElement

public void addFunctionElement(IFunctionElement functionElement)

Adds a function element the function element vector.

buildString

public java.lang.String buildString(ISelectQueryCallback builder)
                             throws QueryException

Builds a query string for the function.

Specified by:

buildString in interface IStringBuilder

Throws:

QueryException

buildString

public void buildString(ISelectQueryCallback builder,
                        java.lang.StringBuffer sb)
                 throws QueryException

Specified by:

buildString in interface IStringBuilder

Throws:

QueryException

equals

public boolean equals(java.lang.Object o)

Tests for equality with the given object.

Overrides:

equals in class java.lang.Object

getFunctionElements

public IFunctionElement[] getFunctionElements()

Returns the function elements as an array.

Specified by:

getFunctionElements in interface IFunction

getName

public java.lang.String getName()

Returns the function name.

Specified by:

getName in interface IFunction

hashCode

public int hashCode()

Computes a hash code for the function.

Overrides:

hashCode in class java.lang.Object

setFunctionElement

public void setFunctionElement(IFunctionElement newFunctionElement)

Sets the function element of the condition.

setFunctionElements

public void setFunctionElements(IFunctionElement[] newFunctionElements)

Sets the function elements of the condition.

setName

public void setName(java.lang.String newName)

Sets the function name.

getDataType

public int getDataType()

Description copied from interface: ILeftOperand

Returns the data type of the value.

Specified by:

getDataType in interface IFunctionElement

Specified by:

getDataType in interface ILeftOperand

See Also:

ILeftOperand.getDataType()

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