ptolemy.data.expr
Class UtilityFunctions.TokenComparator

java.lang.Object
  ptolemy.data.expr.UtilityFunctions.TokenComparator

All Implemented Interfaces:

java.util.Comparator

Enclosing class:

UtilityFunctions

private static class UtilityFunctions.TokenComparator
extends java.lang.Object
implements java.util.Comparator

Comparator for tokens.

Field Summary

private boolean

_ascending

Constructor Summary

UtilityFunctions.TokenComparator(boolean ascending)
Construct a new comparator.

Method Summary

int	compare(java.lang.Object arg0, java.lang.Object arg1) Return -1, 0, or 1 depending on whether the first argument is less than, equal to, or greater than the second.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals

Field Detail

_ascending

private boolean _ascending

Constructor Detail

UtilityFunctions.TokenComparator

public UtilityFunctions.TokenComparator(boolean ascending)

Construct a new comparator.

Parameters:

ascending - True for ascending comparisons.

Method Detail

compare

public int compare(java.lang.Object arg0,
                   java.lang.Object arg1)
            throws java.lang.ClassCastException

Return -1, 0, or 1 depending on whether the first argument is less than, equal to, or greater than the second. If the argument to the constructor was false, then return the converse (to get descending sorts). The arguments are expected to be instances of Token, and in particular, to be instances of ScalarToken (except ComplexToken) or StringToken; otherwise a ClassCastException will be thrown.

Specified by:

compare in interface java.util.Comparator

Parameters:

arg0 - The first argument to compare.

arg1 - The second argument to compare.

Returns:

The result of comparison.

Throws:

java.lang.ClassCastException - If the arguments cannot be compared.