com.bolour.sample.eclipse.service.multiplication
Class Multiplication

java.lang.Object
  |
  +--com.bolour.sample.eclipse.service.multiplication.Multiplication

All Implemented Interfaces:

org.eclipse.core.runtime.IExecutableExtension, IFunction

public class Multiplication

extends java.lang.Object

implements IFunction, org.eclipse.core.runtime.IExecutableExtension

Callback class for the multiplication function.

This class provides a generic multiplication function. A particular instance of this class is parameterized by a specific factor to be used in multiplications. The factor is provided to this instance via a custom XML attribute called constant in its extension specification.

Because this class implements the IExecutableExtension interface, the standard callback creation method of Eclipse, namely, IConfigurationElement.createExecutableExtension knows to initialize a created instance of the class by calling the IExecutableExtension method setInitializationData. This method extracts the value of the constant attribute and initializes the instance with its integer value as the factor for later multiplications.

Author:

Azad

Constructor Summary

Multiplication()

Method Summary

long	compute(long x) Implementation of the multiplication function.
void	setInitializationData(org.eclipse.core.runtime.IConfigurationElement member, java.lang.String propertyName, java.lang.Object data) Initialization method for instances of MultiplicationService.

Methods inherited from class java.lang.Object

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

Constructor Detail

Multiplication

public Multiplication()

Method Detail

compute

public long compute(long x)

Implementation of the multiplication function.

Specified by:

compute in interface IFunction

Following copied from interface: com.bolour.sample.eclipse.service.ui.IFunction

Parameters:

x - A long integer input argument.

Returns:

The result of the callback function.

Throws:

java.lang.ArithmeticException - In case of an error.

setInitializationData

public void setInitializationData(org.eclipse.core.runtime.IConfigurationElement member,
                                  java.lang.String propertyName,
                                  java.lang.Object data)
                           throws org.eclipse.core.runtime.CoreException

Initialization method for instances of MultiplicationService. The multiplication factor for this particular listener is a custom XML attribute of its extension element. Extract the power and remember it for use in this operation.

Specified by:

setInitializationData in interface org.eclipse.core.runtime.IExecutableExtension

See Also:

IExecutableExtension.setInitializationData(org.eclipse.core.runtime.IConfigurationElement, java.lang.String, java.lang.Object)