org.eclipse.mat.query

Class ContextDerivedData

java.lang.Object

org.eclipse.mat.query.ContextDerivedData

Direct Known Subclasses:

RetainedSizeDerivedData

public abstract class ContextDerivedData
extends Object

Synthetic data columns

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	ContextDerivedData.DerivedCalculator A way of actually doing the calculations.
static class	ContextDerivedData.DerivedColumn A column of data derived from the existing data.
static class	ContextDerivedData.DerivedOperation A way of calculating the column values.

Constructor Summary

Constructors

Constructor and Description
ContextDerivedData()

Method Summary

Modifier and Type	Method and Description
abstract Column	columnFor(ContextDerivedData.DerivedColumn derivedColumn, IResult result, ContextProvider provider) Get a column ready to use, based on the derived column
abstract ContextDerivedData.DerivedColumn[]	getDerivedColumns() Get all the derived columns for the current context (page) Do not modify the returned array.
abstract String	labelFor(ContextDerivedData.DerivedColumn derivedColumn, ContextProvider provider) Get the label for the extra column
ContextDerivedData.DerivedColumn	lookup(ContextDerivedData.DerivedOperation operation) Find the appropriate column for the requested operation

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ContextDerivedData

public ContextDerivedData()

Method Detail

getDerivedColumns

public abstract ContextDerivedData.DerivedColumn[] getDerivedColumns()

Get all the derived columns for the current context (page) Do not modify the returned array.

Returns:

an array of columns

labelFor

public abstract String labelFor(ContextDerivedData.DerivedColumn derivedColumn,
                                ContextProvider provider)

Get the label for the extra column

Parameters:

derivedColumn - the extra column

provider - how the column was generated

Returns:

the label

columnFor

public abstract Column columnFor(ContextDerivedData.DerivedColumn derivedColumn,
                                 IResult result,
                                 ContextProvider provider)

Get a column ready to use, based on the derived column

Parameters:

derivedColumn - the extra column

result - the original result to be enhanced

provider - the provider of all the data

Returns:

the column

lookup

public final ContextDerivedData.DerivedColumn lookup(ContextDerivedData.DerivedOperation operation)

Find the appropriate column for the requested operation

Parameters:

operation - the operation to generate the column values

Returns:

the column