ptolemy.graph.mapping
Class ToDoubleMapMapping

java.lang.Object
  ptolemy.graph.mapping.MapMapping
      ptolemy.graph.mapping.ToDoubleMapMapping

All Implemented Interfaces:

Mapping, ToDoubleMapping

public class ToDoubleMapMapping
extends MapMapping
implements ToDoubleMapping

A ToDoubleMapping that is based on a Map. The values in the Map must be instances of Double. ToDoubleMapMappings are immutable in the sense that the underlying Map cannot be changed (although the keys and values associated with the Map can be changed).

Since:

Ptolemy II 4.0

Version:

$Id: ToDoubleMapMapping.java 57040 2010-01-27 20:52:32Z cxh $

Author:

Shuvra S. Bhattacharyya

Accepted Rating:

Red (ssb)

Proposed Rating:

Red (ssb)

Field Summary

Fields inherited from class ptolemy.graph.mapping.MapMapping

_map

Constructor Summary

ToDoubleMapMapping(java.util.Map map)
Construct a ToDoubleMapMapping from a given map.

Method Summary

boolean	inDomain(java.lang.Object object) Return true if the given object is in the domain of this Mapping.
double	toDouble(java.lang.Object object) Return the double value that is associated with given object under this mapping.
java.lang.Object	toObject(java.lang.Object object) Return the object associated with the given object.

Methods inherited from class ptolemy.graph.mapping.MapMapping

equals, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ToDoubleMapMapping

public ToDoubleMapMapping(java.util.Map map)

Construct a ToDoubleMapMapping from a given map. The values in the map must be instances of Double; otherwise, unpredictable behavior may result. Modifications to the argument Map after construction of this mapping will be reflected in the mapping. The Map modifications must follow the restriction that all added values to the Map must be instances of Double.

Parameters:

map - The given map.

Method Detail

inDomain

public boolean inDomain(java.lang.Object object)

Return true if the given object is in the domain of this Mapping. More precisely, return true if the given object is a valid argument to toDouble(Object), which means that the object is a key in the Map that is associated with this Mapping and the value in the Map is an instance of Double.

Specified by:

inDomain in interface Mapping

Overrides:

inDomain in class MapMapping

Parameters:

object - The given object.

Returns:

True if the given object is in the domain of this Mapping.

toDouble

public double toDouble(java.lang.Object object)

Return the double value that is associated with given object under this mapping. For efficiency, no error checking is performed on the argument, and consequently, a runtime exception may result as noted below. To perform argument validity checking before mapping an object, use ptolemy.graph.mapping.

Specified by:

toDouble in interface ToDoubleMapping

Parameters:

object - The given object.

Returns:

The double value that is associated with given object under this mapping.

Throws:

java.lang.RuntimeException - If the given object is not an instance of Double or if the given object is not in the domain of the mapping.

toObject

public java.lang.Object toObject(java.lang.Object object)

Return the object associated with the given object.

Specified by:

toObject in interface Mapping

Parameters:

object - The given object.

Returns:

The object that is associated with given object under this mapping.