Package ucar.unidata.data

Class DerivedDataChoice

java.lang.Object

ucar.unidata.data.DataChoice

ucar.unidata.data.ListDataChoice

ucar.unidata.data.DerivedDataChoice

public class DerivedDataChoice
extends ListDataChoice

A subclass of DataChoice for derived quantities.

Version:

$Revision: 1.118 $

Author:

IDV Development Team

Field Summary

Fields

Modifier and Type	Field	Description
static String	PROP_FROMDERIVED	Property indicating this is a derived quantity

Fields inherited from class ucar.unidata.data.DataChoice

description, id, name, NULL_DATASELECTION, NULL_PROPERTIES, NULL_REQUESTPROPERTIES, parent, PROP_ICON, PROP_REQUESTER, properties

Constructor Summary

Constructors

Constructor	Description
DerivedDataChoice()	Dummy param-less constructor so we can be recreated thru reflection.
DerivedDataChoice(DataContext dataContext, String formula)	Used when not creating it from a DerivedDataDescriptor.
DerivedDataChoice(DataContext dataContext, List dataChoices, String name, String description, String categories, String method, String formula, String code)	Used when not creating it from a DerivedDataDescriptor.
DerivedDataChoice(DataContext dataContext, List dataChoices, String desc, DerivedDataDescriptor ddd)	The regular constructor from a DerivedDataDescriptor TODO: Right now the children of a DerivedDataChoice do not refererence their parent.
DerivedDataChoice(DataContext dataContext, DerivedDataDescriptor ddd)	This is the constructor used when creating a DDC as an end user formula.
DerivedDataChoice(DerivedDataChoice that)	The copy ctor.

Method Summary

Modifier and Type	Method	Description
static String	cleanupJythonCode(String code)	Clean up any JythonCode that the user inputs
DataChoice	cloneMe()	Create a new instance of this object.
boolean	equals(Object o)	Override the equals method.
String	getCode()	Get the code.
protected Data	getData(DataCategory category, DataSelection incomingDataSelection, Hashtable requestProperties)	Apply the derived operation.
DataContext	getDataContext()	Get the DataContext.
DerivedDataDescriptor	getDataDescriptor()	Get the DerivedDataDescriptor.
String	getFormula()	Get the formula.
String	getFullDescription()	Get the full Description for this DataChoice.
String	getMethodName()	Get the method name.
Hashtable	getUserSelectedChoices()	Get the user selected choices.
int	hashCode()	Override the hasCode method.
boolean	isEndUserFormula()	Is this an (editable) end user formula.
static void	main(String[] args)	Method for testing.
static List	parseOperands(String jythonCode)	Parse out the operands in the given Jython code.
static List	parseOperands(String jythonCode, List operands, Hashtable seen)	parse the operands in the given jython code
void	setClassName(String m)	Stub method to keep around so persistence won't flag a warning.
void	setCode(String m)	Set the code.
void	setDataContext(DataContext c)	Set the DataContext.
void	setDescriptor(DerivedDataDescriptor value)	Set the descriptor.
void	setExtraArgs(String foo)	Dummy for persistence.
void	setFormula(String formula)	Set the formula.
void	setMethodName(String methodName)	Set the method name.
void	setUserSelectedChoices(Hashtable value)	Set the user selected choices.

Methods inherited from class ucar.unidata.data.ListDataChoice

addDataChangeListener, addDataChangeListeners, basicallyEquals, checkCategories, convertLabel, findDataCategories, flushCache, getAllDateTimes, getAllLevels, getChoices, getDataList, getDataSources, getFinalDataChoices, getIndexedName, getSelectedDateTimes, inherit, initAfterUnPersistence, removeDataChangeListener, setChildrenDataChoices, setChoices

Methods inherited from class ucar.unidata.data.DataChoice

addCategory, addCurrentName, addParamNameToCategories, cloneDataChoices, createClone, getAllLevels, getCategories, getCurrentNames, getData, getData, getDataCategories, getDataCategories, getDataSelection, getDescription, getDisplayCategory, getFixedRequestProperties, getForUser, getId, getName, getParent, getProperties, getProperty, getProperty, getProperty, getStringId, mergeRequestProperties, setCategories, setDataCategories, setDataSelection, setDescription, setFixedRequestProperties, setId, setLevelSelection, setName, setObjectProperty, setParent, setProperties, setProperty, setProperty, setTimeSelection, toString

Methods inherited from class java.lang.Object

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

Field Details

PROP_FROMDERIVED

public static String PROP_FROMDERIVED

Property indicating this is a derived quantity

Constructor Details

DerivedDataChoice

public DerivedDataChoice()

Dummy param-less constructor so we can be recreated thru reflection.

DerivedDataChoice

public DerivedDataChoice(DerivedDataChoice that)

The copy ctor.

Parameters:

that - The object to instantiate from.

DerivedDataChoice

public DerivedDataChoice(DataContext dataContext,
 List dataChoices,
 String desc,
 DerivedDataDescriptor ddd)

The regular constructor from a DerivedDataDescriptor TODO: Right now the children of a DerivedDataChoice do not refererence their parent. If they do we will need to clone the children here so a DataChoice only has one parent.

Parameters:

dataContext - The context in which this DataChoice exists (typically the IntegratedDataViewer).

dataChoices - The list of initial children data choices (the operands).

desc - The long description of this choice.

ddd - The DerivedDataDescriptor that holds the information to instantiate this choice.

DerivedDataChoice

public DerivedDataChoice(DataContext dataContext,
 DerivedDataDescriptor ddd)

This is the constructor used when creating a DDC as an end user formula.

Parameters:

dataContext - The context in which this DataChoice exists (typically the IntegratedDataViewer).

ddd - The DerivedDataDescriptor that holds the information to instantiate this choice.

DerivedDataChoice

public DerivedDataChoice(DataContext dataContext,
 List dataChoices,
 String name,
 String description,
 String categories,
 String method,
 String formula,
 String code)

Used when not creating it from a DerivedDataDescriptor.

Parameters:

dataContext - The context in which this DataChoice exists (typically the IntegratedDataViewer).

dataChoices - The list of initial children data choices (the operands).

name - The name of this DataChoice.

description - The description of this DataChoice.

categories - The list if DataCategorys.

method - The method name used as the operator (may be null).

formula - The formula body used as the operator (may be null).

code - The code body used as the operator (may be null). (Note: having different code and formula attributes is just a hangover from the initial development. They are acted upon in the same way.

DerivedDataChoice

public DerivedDataChoice(DataContext dataContext,
 String formula)

Used when not creating it from a DerivedDataDescriptor.

Parameters:

dataContext - The context in which this DataChoice exists (typically the IntegratedDataViewer).

formula - The formula body used as the operator

Method Details

cloneMe

public DataChoice cloneMe()

Create a new instance of this object.

Overrides:

cloneMe in class ListDataChoice

Returns:

The new instance.

getFullDescription

public String getFullDescription()

Get the full Description for this DataChoice.

Overrides:

getFullDescription in class ListDataChoice

Returns:

full description

getData

protected Data getData(DataCategory category,
 DataSelection incomingDataSelection,
 Hashtable requestProperties)
                throws VisADException,
RemoteException,
DataCancelException

Apply the derived operation. If any of the getData of the sub-dataChoices returns null or if on a user select we get null back then this returns null.

Overrides:

getData in class ListDataChoice

Parameters:

category - Ignore this for now.

incomingDataSelection - Allows one to subset the getData call (e.g., selecting times).

requestProperties - extra request properties

Returns:

The Data object that is the result of applying the operator held by this choice to its set of operands.

Throws:

DataCancelException - if the request was canelled

RemoteException - Java RMI problem

VisADException - VisAD problem

setFormula

public void setFormula(String formula)

Set the formula. Mostly used for xml encoding.

Parameters:

formula - The new value.

getFormula

public String getFormula()

Get the formula. Mostly used for xml encoding.

Returns:

The formula.

getMethodName

public String getMethodName()

Get the method name. Mostly used for xml encoding.

Returns:

The method name.

setMethodName

public void setMethodName(String methodName)

Set the method name. Mostly used for xml encoding.

Parameters:

methodName - The new value.

setClassName

public void setClassName(String m)

Stub method to keep around so persistence won't flag a warning.

Parameters:

m - class name

getCode

public String getCode()

Get the code. Mostly used for xml encoding.

Returns:

The code.

setCode

public void setCode(String m)

Set the code. Mostly used for xml encoding.

Parameters:

m - The new value.

setUserSelectedChoices

public void setUserSelectedChoices(Hashtable value)

Set the user selected choices. Mostly used for xml encoding.

Parameters:

value - a hashtable of choices

getUserSelectedChoices

public Hashtable getUserSelectedChoices()

Get the user selected choices. Mostly used for xml encoding.

Returns:

The user selected choices.

setDescriptor

public void setDescriptor(DerivedDataDescriptor value)

Set the descriptor. Mostly used for xml encoding.

Parameters:

value - the new DerivedDataDescriptor

getDataDescriptor

public DerivedDataDescriptor getDataDescriptor()

Get the DerivedDataDescriptor. Mostly used for xml encoding.

Returns:

The DerivedDataDescriptor.

setExtraArgs

public void setExtraArgs(String foo)

Dummy for persistence.

Parameters:

foo - extra args

hashCode

public int hashCode()

Override the hasCode method.

Overrides:

hashCode in class ListDataChoice

Returns:

The object's hashcode.

equals

public boolean equals(Object o)

Override the equals method.

Overrides:

equals in class ListDataChoice

Parameters:

o - Obejct to compare to.

Returns:

Is equals?

isEndUserFormula

public boolean isEndUserFormula()

Is this an (editable) end user formula.

Overrides:

isEndUserFormula in class DataChoice

Returns:

true if no descriptor

parseOperands

public static List parseOperands(String jythonCode)

Parse out the operands in the given Jython code. Return a list of DataOperands

Parameters:

jythonCode - The code.

Returns:

List of operands.

parseOperands

public static List parseOperands(String jythonCode,
 List operands,
 Hashtable seen)

parse the operands in the given jython code

Parameters:

jythonCode - jython code to parse

operands - ???

seen - operands we have seen so far

Returns:

the operands

cleanupJythonCode

public static String cleanupJythonCode(String code)

Clean up any JythonCode that the user inputs

Parameters:

code - code to clean up

Returns:

cleaned up code

getDataContext

public DataContext getDataContext()

Get the DataContext. Mostly used for xml encoding.

Returns:

The DataContext.

setDataContext

public void setDataContext(DataContext c)

Set the DataContext. Mostly used for xml encoding.

Parameters:

c - The new value.

main

public static void main(String[] args)

Method for testing.

Parameters:

args - operands