Package org.variantsync.studies.evolution.simulation.diff.splitting

Class DefaultContextProvider

java.lang.Object

org.variantsync.studies.evolution.simulation.diff.splitting.DefaultContextProvider

All Implemented Interfaces:

IContextProvider

public class DefaultContextProvider
extends Object
implements IContextProvider

A context provider is responsible for providing the correct context whenever lines in a patch are filtered. This becomes necessary, because filtering changes from a patch results in a new context for adjacent changes that have not been filtered. The DefaultContextProvider determines a new context based on the filters that are used to adjust a patch.

Constructor Summary

Constructors

Constructor	Description
DefaultContextProvider(Path rootDir)
DefaultContextProvider(Path rootDir, int contextSize)

Method Summary

Modifier and Type	Method	Description
List<Line>	leadingContext(ILineFilter lineFilter, FileDiff fileDiff, int index)	Determine the lines in the leading context of a change and return them.
List<Line>	trailingContext(ILineFilter lineFilter, FileDiff fileDiff, int index)	Determine the lines in the trailing context of a change and return them.

Methods inherited from class java.lang.Object

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

Constructor Details

DefaultContextProvider

public DefaultContextProvider(Path rootDir)

Parameters:

rootDir - The working directory containing the files for which a context is to be determined

DefaultContextProvider

public DefaultContextProvider(Path rootDir,
 int contextSize)

Parameters:

rootDir - The working directory containing the files for which a context is to be determined

contextSize - The size of the provided context (i.e., number of leading/trailing lines)

Method Details

leadingContext

public List<Line> leadingContext(ILineFilter lineFilter,
 FileDiff fileDiff,
 int index)

Description copied from interface: IContextProvider

Determine the lines in the leading context of a change and return them. The context is determined based on a provided filter that may remove lines from the context.

Specified by:

leadingContext in interface IContextProvider

Parameters:

lineFilter - The line filter that has been used to adjust the patch for which the context is provided

fileDiff - The file diff containing the hunks for which a new context is to be determined

index - The line number of the change for which a context is to be provided

Returns:

The leading context for the change

trailingContext

public List<Line> trailingContext(ILineFilter lineFilter,
 FileDiff fileDiff,
 int index)

Description copied from interface: IContextProvider

Determine the lines in the trailing context of a change and return them. The context is determined based on a provided filter that may remove lines from the context.

Specified by:

trailingContext in interface IContextProvider

Parameters:

lineFilter - The line filter that has been used to adjust the patch for which the context is provided

fileDiff - The file diff containing the hunks for which a new context is to be determined

index - The line number of the change for which a context is to be provided

Returns:

The trailing context for the change