ptolemy.data.expr
Class CachedMethod.ArgumentConversion

java.lang.Object
  ptolemy.data.expr.CachedMethod.ArgumentConversion

Direct Known Subclasses:

CachedMethod.TypeArgumentConversion

Enclosing class:

CachedMethod

public static class CachedMethod.ArgumentConversion
extends java.lang.Object

Class representing an argument conversion. Instances of this class are returned by getConversions(). Note that in most cases, it is not necessary to reference this class directly, as the invoke() method applies all the necessary conversions. It is provided for code, such as the code generator that need more than the usual amount of information about methods that have been found.

The preference is n index given an order to the preference of conversions. Lower preferences represent less desirable conversions than higher preferences.

Field Summary

protected int

_preference The preference is n index given an order to the preference of conversions.

Constructor Summary

private

CachedMethod.ArgumentConversion(int preference) Construct an argument conversino.

Method Summary

java.lang.Object	convert(Token input) Convert the given token into an object that can be used to invoke a method through the reflection mechanism.
int	getPreference() Return the preference of this conversion, relative to other conversions.
boolean	isPreferableTo(CachedMethod.ArgumentConversion conversion) Return true if this conversion is preferable to the given conversion.
java.lang.String	toString() Return a string representation of this conversion.

Methods inherited from class java.lang.Object

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

Field Detail

_preference

protected int _preference

The preference is n index given an order to the preference of conversions. Lower preferences represent less desirable conversions than higher preferences.

Constructor Detail

CachedMethod.ArgumentConversion

private CachedMethod.ArgumentConversion(int preference)

Construct an argument conversino.

Parameters:

preference - The preference of this conversion. The preference is n index given an order to the preference of conversions. Lower preferences represent less desirable conversions than higher preferences.

Method Detail

getPreference

public int getPreference()

Return the preference of this conversion, relative to other conversions. The higher the preference, the more preferable the conversion.

Returns:

The preference of this conversion.

convert

public java.lang.Object convert(Token input)
                         throws IllegalActionException

Convert the given token into an object that can be used to invoke a method through the reflection mechanism. Derived classes will override this method to provide different types of argument conversions.

Parameters:

input - The token to be converted

Throws:

IllegalActionException - Always thrown in this base class.

isPreferableTo

public boolean isPreferableTo(CachedMethod.ArgumentConversion conversion)

Return true if this conversion is preferable to the given conversion.

Parameters:

conversion - The conversion to be tested.

Returns:

True if this conversion is prefereable to the given conversion.

toString

public java.lang.String toString()

Return a string representation of this conversion.

Overrides:

toString in class java.lang.Object

Returns:

A string representation of this conversion.