Class 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.


Constructor Summary
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


public Multiplication()
Method Detail


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
x - A long integer input argument.
The result of the callback function.
java.lang.ArithmeticException - In case of an error.


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)