org.zkoss.pivot.impl
Class AbstractCalculator

java.lang.Object
  org.zkoss.pivot.impl.AbstractCalculator

All Implemented Interfaces:

Calculator

Direct Known Subclasses:

NumericBinaryCalculator

public abstract class AbstractCalculator
extends java.lang.Object
implements Calculator

The minimal implemenation of Calculator

Author:

simonpai

Constructor Summary

AbstractCalculator(java.lang.String type)

Method Summary

abstract java.lang.Number	calculate(java.util.Collection<java.lang.Object> data) Returns a calculated number for each data cell.
java.lang.String	getType() This is the key to identify whether two Calculator carry the same behavior so they can be cascaded.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractCalculator

public AbstractCalculator(java.lang.String type)

Method Detail

calculate

public abstract java.lang.Number calculate(java.util.Collection<java.lang.Object> data)

Description copied from interface: Calculator

Returns a calculated number for each data cell.

Specified by:

calculate in interface Calculator

getType

public java.lang.String getType()

Description copied from interface: Calculator

This is the key to identify whether two Calculator carry the same behavior so they can be cascaded. For example, suppose there is a Sum Calculator on a column field and a Count Calculator on a row field. The intersecting cell of their subtotal ranks should be empty, as Sum of Count or Count of Sum does not really make sense (they are of different type).

Specified by:

getType in interface Calculator