ptolemy.moml.filter

Class ParameterNameChanges

java.lang.Object

ptolemy.moml.filter.MoMLFilterSimple

ptolemy.moml.filter.ParameterNameChanges

All Implemented Interfaces:

MoMLFilter

public class ParameterNameChanges
extends MoMLFilterSimple

When this class is registered with the MoMLParser.setMoMLFilter() method, it will cause MoMLParser to filter so that models from earlier releases will run in the current release.

This class will filter for classes with Parameters where the parameter name has changed.

For example, after Ptolemy II 2.2, the PNDirector changed in such a way that the 'Initial_queue_capacity' parameter is now 'initialQueueCapacity'.

To add this change to this filter, we add a code to the static section at the bottom of the file.

 // PNDirectory: After 2.2, 'Initial_queue_capacity'
 // property is now 'initialQueueCapacity'

 HashMap pnDirectorChanges = new HashMap<String, String>();
 // Key = property name, Value = new class name
 pnDirectorChanges.put("Initial_queue_capacity",
 "initialQueueCapacity");
 

The pnDirectorChange HashMap maps property names to the new name

 _classesWithParameterNameChanges
 .put("ptolemy.domains.pn.PNDirectory",
 pnDirectorChanges);
 

The _classesWithParameterNameChanges HashMap contains all the classes such as PNDirector that have changes and each class has a map of the Parameter changes that are to be made.

Conceptually, how the code works is that when we see a class while parsing, we check to see if the class is in _classesWithParameterNameChanges. If the class was present in the HashMap, then as we go through the code, we look for property names that need to have their classes changed.

NOTE: This class and PortNameChange might conflict if a port and parameter have the same name.

Since:

Ptolemy II 2.2

Author:

Christopher Hylands

Pt.AcceptedRating:

Red (cxh)

Pt.ProposedRating:

Red (cxh)

Constructor Summary

Constructors

Constructor and Description
ParameterNameChanges()

Method Summary

Modifier and Type	Method and Description
java.lang.String	filterAttributeValue(NamedObj container, java.lang.String element, java.lang.String attributeName, java.lang.String attributeValue, java.lang.String xmlFile) If the attributeName is "class" and attributeValue names a class that has had a Parameter names changed between releases, then substitute in the new Parameter names.
void	filterEndElement(NamedObj container, java.lang.String elementName, java.lang.StringBuffer currentCharData, java.lang.String xmlFile) In this class, do nothing.
java.lang.String	toString() Return a string that describes what the filter does.

Methods inherited from class ptolemy.moml.filter.MoMLFilterSimple

filterAttributeValue, filterEndElement

Methods inherited from class java.lang.Object

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

Constructor Detail

ParameterNameChanges

public ParameterNameChanges()

Method Detail

filterAttributeValue

public java.lang.String filterAttributeValue(NamedObj container,
                                             java.lang.String element,
                                             java.lang.String attributeName,
                                             java.lang.String attributeValue,
                                             java.lang.String xmlFile)

If the attributeName is "class" and attributeValue names a class that has had a Parameter names changed between releases, then substitute in the new Parameter names.

Parameters:

container - The container for this attribute. in this method.

element - The XML element name.

attributeName - The name of the attribute.

attributeValue - The value of the attribute.

xmlFile - The file currently being parsed.

Returns:

the value of the attributeValue argument.

filterEndElement

public void filterEndElement(NamedObj container,
                             java.lang.String elementName,
                             java.lang.StringBuffer currentCharData,
                             java.lang.String xmlFile)
                      throws java.lang.Exception

In this class, do nothing.

Parameters:

container - The object created by this element.

elementName - The element name.

currentCharData - The character data, which appears only in the doc and configure elements

xmlFile - The file currently being parsed.

Throws:

java.lang.Exception - Not thrown in this base class.

toString

public java.lang.String toString()

Return a string that describes what the filter does.

Specified by:

toString in interface MoMLFilter

Overrides:

toString in class java.lang.Object

Returns:

the description of the filter that ends with a newline.