net.sf.arise.piji.fun
Class AbstractCompareFunction

java.lang.Object
  |
  +--net.sf.arise.piji.AbstractFunction
        |
        +--net.sf.arise.piji.fun.AbstractCompareFunction

All Implemented Interfaces:

Function

Direct Known Subclasses:

EqualsFunction, GreaterThanEqualFunction, GreaterThanFunction, LessThanEqualFunction, LessThanFunction

public abstract class AbstractCompareFunction

extends AbstractFunction

< is the Comparable less-than operator. Takes two or more arguments. Also works on numbers.

Author:

Kjetil Valstadsve

Constructor Summary

AbstractCompareFunction(java.lang.String docString, Context ctx)

Method Summary

java.lang.Object	apply(Context context, Expression[] args) Applies the function to a set of values in a given context and returns the result
protected abstract boolean	compareFailed(java.lang.Object last, java.lang.Object value)
protected boolean	requiresComparable()

Methods inherited from class net.sf.arise.piji.AbstractFunction

checkArgumentCount, checkLeaf, checkLeaf, checkList, checkList, checkString, checkString, checkSymbol, checkSymbol, checkSymbol, checkSymbol, fillContext, fillContext, getArgumentCount, getContext, getDocumentationString, isLeaf, isList, isString, isSymbol, isVararg

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractCompareFunction

public AbstractCompareFunction(java.lang.String docString,
                               Context ctx)

Method Detail

requiresComparable

protected boolean requiresComparable()

compareFailed

protected abstract boolean compareFailed(java.lang.Object last,
                                         java.lang.Object value)

apply

public java.lang.Object apply(Context context,
                              Expression[] args)
                       throws java.lang.Throwable

Description copied from interface: Function

Applies the function to a set of values in a given context and returns the result

Specified by:

apply in interface Function

Specified by:

apply in class AbstractFunction

Parameters:

context - The context to apply this function in

Returns:

The result of the function applied to the arguments in the context

java.lang.Throwable