jsynoptic.data
Class ExpressionDataSource

java.lang.Object
  simtools.data.ValueProvider
      simtools.data.DataSource
          jsynoptic.data.ExpressionDataSource

All Implemented Interfaces:

DataSourceListener

public class ExpressionDataSource
extends DataSource
implements DataSourceListener

A data source that evaluate a mathematical expression on other sources to compute its values

Field Summary

protected static java.lang.String	EXPRESSION_DATA_SOURCE_MARKER
protected DataInfo	info
protected double	max
protected long	maxIndex
protected double	min min max values if computed
protected long	minIndex
protected boolean	minmaxOk
protected ExpressionNode	rootNode
protected java.util.Set	variables

Fields inherited from class simtools.data.DataSource

endNotificationListeners, listeners, sortedOrder

Fields inherited from class simtools.data.ValueProvider

ByteProvider, DoubleProvider, FloatProvider, IntegerProvider, kind, LongProvider, ObjectProvider, ShortProvider

Constructor Summary

ExpressionDataSource(DataInfo di, ExpressionNode rootNode)

Method Summary

void	changeExpression(java.lang.String exp, ExpressionNode node)
void	cleanup() Remove the listeners
long	computeLastIndex()
java.lang.Object	computeMax()
java.lang.Object	computeMin() Force the computation if possible.
protected void	computeMinMax()
long	computeStartIndex()
void	DataSourceIndexRangeChanged(DataSource ds, long startIndex, long lastIndex) Called when the range of valid index changed
void	DataSourceInfoChanged(DataSource ds, DataInfo newInfo) Called when the information about the data source changed
void	DataSourceOrderChanged(DataSource ds, int newOrder) If defined, called when the order of the source changed.
void	DataSourceReplaced(DataSource oldData, DataSource newData) Called when a data source is replaced by another one
void	DataSourceValueChanged(DataSource ds, long minIndex, long maxIndex) Called when at least a value changed in the data source.
void	DataSourceValueRangeChanged(DataSource ds) Called when the range of possible values changed, if defined.
java.lang.String	getDataSourceInformationClass() This method provide the UI Data source information class name.
DataInfo	getInformation()
long	getLastIndex()
java.lang.Object	getMax()
java.lang.Object	getMin() Return values if possibly only, without expensive computations.
DataSource[]	getSourceDependencies() Returns an array of dependant data sources when serializing.
long	getStartIndex()
java.lang.Object	getValue(long index)
java.util.Set	getVariables()
boolean	isComparable() Check if the values are comparable with each other.
java.lang.String	toString()

Methods inherited from class simtools.data.DataSource

addEndNotificationListener, addListener, computeSortedOrder, createEmptyDataSource, equals, getAuxiliarySources, getByteMax, getByteMin, getChoiceFormat, getDoubleMax, getDoubleMin, getFloatMax, getFloatMin, getIntegerMax, getIntegerMin, getLongMax, getLongMin, getShortMax, getShortMin, getSortedOrder, isAuxiliary, isCompound, notifyEndNotificationListeners, notifyListenersForDataReplaced, notifyListenersForDataReplaced, notifyListenersForIndexRangeChange, notifyListenersForInfoChange, notifyListenersForOrderChange, notifyListenersForValueChange, notifyListenersForValueRangeChange, removeEndNotificationListener, removeListener, setSlice, sortedOrder, updateSortedOrder

Methods inherited from class simtools.data.ValueProvider

getByteValue, getDoubleValue, getFloatValue, getIntegerValue, getKind, getLongValue, getObjectValue, getShortValue, valueClass

Methods inherited from class java.lang.Object

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

Field Detail

rootNode

protected ExpressionNode rootNode

variables

protected java.util.Set variables

info

protected DataInfo info

minIndex

protected long minIndex

maxIndex

protected long maxIndex

min

protected double min

min max values if computed

max

protected double max

minmaxOk

protected boolean minmaxOk

EXPRESSION_DATA_SOURCE_MARKER

protected static java.lang.String EXPRESSION_DATA_SOURCE_MARKER

Constructor Detail

ExpressionDataSource

public ExpressionDataSource(DataInfo di,
                            ExpressionNode rootNode)

Method Detail

getVariables

public java.util.Set getVariables()

Returns:

Returns the variables.

getInformation

public DataInfo getInformation()

Overrides:

getInformation in class DataSource

computeMin

public java.lang.Object computeMin()
                            throws UnsupportedOperation

Description copied from class: DataSource

Force the computation if possible. The operation may take some time.

Overrides:

computeMin in class DataSource

Throws:

UnsupportedOperation

computeMax

public java.lang.Object computeMax()
                            throws UnsupportedOperation

Overrides:

computeMax in class DataSource

Throws:

UnsupportedOperation

getMin

public java.lang.Object getMin()
                        throws UnsupportedOperation

Description copied from class: DataSource

Return values if possibly only, without expensive computations.

Overrides:

getMin in class DataSource

Throws:

UnsupportedOperation

getMax

public java.lang.Object getMax()
                        throws UnsupportedOperation

Overrides:

getMax in class DataSource

Throws:

UnsupportedOperation

computeMinMax

protected void computeMinMax()
                      throws UnsupportedOperation

Throws:

UnsupportedOperation

changeExpression

public void changeExpression(java.lang.String exp,
                             ExpressionNode node)

Parameters:

exp -

node -

cleanup

public void cleanup()

Remove the listeners

getValue

public java.lang.Object getValue(long index)
                          throws DataException

Specified by:

getValue in class ValueProvider

Throws:

DataException

DataSourceValueChanged

public void DataSourceValueChanged(DataSource ds,
                                   long minIndex,
                                   long maxIndex)

Description copied from interface: DataSourceListener

Called when at least a value changed in the data source. The listener shall then get the values in the given range again, if it is interested by the values in that range.

Specified by:

DataSourceValueChanged in interface DataSourceListener

Parameters:

ds - The data source that changed

minIndex - Lower bound of the range where values changed

maxIndex - Higher bound of the range where values changed

DataSourceIndexRangeChanged

public void DataSourceIndexRangeChanged(DataSource ds,
                                        long startIndex,
                                        long lastIndex)

Description copied from interface: DataSourceListener

Called when the range of valid index changed

Specified by:

DataSourceIndexRangeChanged in interface DataSourceListener

Parameters:

ds - The data source that changed

startIndex - The new start Index

lastIndex - The new last index

DataSourceInfoChanged

public void DataSourceInfoChanged(DataSource ds,
                                  DataInfo newInfo)

Description copied from interface: DataSourceListener

Called when the information about the data source changed

Specified by:

DataSourceInfoChanged in interface DataSourceListener

Parameters:

ds - The data source that changed

DataSourceValueRangeChanged

public void DataSourceValueRangeChanged(DataSource ds)

Description copied from interface: DataSourceListener

Called when the range of possible values changed, if defined.

Specified by:

DataSourceValueRangeChanged in interface DataSourceListener

Parameters:

ds - The data source that changed

DataSourceOrderChanged

public void DataSourceOrderChanged(DataSource ds,
                                   int newOrder)

Description copied from interface: DataSourceListener

If defined, called when the order of the source changed. See the sortedOrder() in the Datasource class for more information.

Specified by:

DataSourceOrderChanged in interface DataSourceListener

Parameters:

ds - The data source that changed

DataSourceReplaced

public void DataSourceReplaced(DataSource oldData,
                               DataSource newData)

Description copied from interface: DataSourceListener

Called when a data source is replaced by another one

Specified by:

DataSourceReplaced in interface DataSourceListener

computeLastIndex

public long computeLastIndex()
                      throws UnsupportedOperation

Overrides:

computeLastIndex in class DataSource

Throws:

UnsupportedOperation

computeStartIndex

public long computeStartIndex()
                       throws UnsupportedOperation

Overrides:

computeStartIndex in class DataSource

Throws:

UnsupportedOperation

getLastIndex

public long getLastIndex()
                  throws UnsupportedOperation

Overrides:

getLastIndex in class DataSource

Throws:

UnsupportedOperation

getStartIndex

public long getStartIndex()
                   throws UnsupportedOperation

Overrides:

getStartIndex in class DataSource

Throws:

UnsupportedOperation

isComparable

public boolean isComparable()

Description copied from class: DataSource

Check if the values are comparable with each other. If they are, the sortedOrder() function tells if they are also sorted.

Overrides:

isComparable in class DataSource

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getSourceDependencies

public DataSource[] getSourceDependencies()

Description copied from class: DataSource

Returns an array of dependant data sources when serializing. Think carefully before using this feature, as it is usually not needed.
You need to overload this function if, and only if, this data source provider recursively depends on other data sources beeing already written to work correctly.
WARNING: Cyclic dependencies would result in an infinite recursion loop.

Overrides:

getSourceDependencies in class DataSource

getDataSourceInformationClass

public java.lang.String getDataSourceInformationClass()

Description copied from class: DataSource

This method provide the UI Data source information class name. Should be overloaded in sub classes to return specified information

Overrides:

getDataSourceInformationClass in class DataSource

Returns:

the box