com.izforge.izpack.util.file

Class SourceFileScanner

java.lang.Object

com.izforge.izpack.util.file.SourceFileScanner

All Implemented Interfaces:

ResourceFactory

public class SourceFileScanner
extends Object
implements ResourceFactory

Utility class that collects the functionality of the various scanDir methods that have been scattered in several tasks before.

The only method returns an array of source files. The array is a subset of the files given as a parameter and holds only those that are newer than their corresponding target files.

Constructor Summary

Constructors

Constructor and Description
SourceFileScanner()

Method Summary

Modifier and Type	Method and Description
Resource	getResource(String name) returns resource information for a file at destination
String[]	restrict(String[] files, File srcDir, File destDir, FileNameMapper mapper) Restrict the given set of files to those that are newer than their corresponding target files.
String[]	restrict(String[] files, File srcDir, File destDir, FileNameMapper mapper, long granularity) Restrict the given set of files to those that are newer than their corresponding target files.
File[]	restrictAsFiles(String[] files, File srcDir, File destDir, FileNameMapper mapper) Convinience layer on top of restrict that returns the source files as File objects (containing absolute paths if srcDir is absolute).
File[]	restrictAsFiles(String[] files, File srcDir, File destDir, FileNameMapper mapper, long granularity) Convinience layer on top of restrict that returns the source files as File objects (containing absolute paths if srcDir is absolute).

Methods inherited from class java.lang.Object

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

Constructor Detail

SourceFileScanner

public SourceFileScanner()

Method Detail

restrict

public String[] restrict(String[] files,
                         File srcDir,
                         File destDir,
                         FileNameMapper mapper)
                  throws Exception

Restrict the given set of files to those that are newer than their corresponding target files.

Parameters:

files - the original set of files

srcDir - all files are relative to this directory

destDir - target files live here. if null file names returned by the mapper are assumed to be absolute.

mapper - knows how to construct a target file names from source file names.

Throws:

Exception

restrict

public String[] restrict(String[] files,
                         File srcDir,
                         File destDir,
                         FileNameMapper mapper,
                         long granularity)
                  throws Exception

Restrict the given set of files to those that are newer than their corresponding target files.

Parameters:

files - the original set of files

srcDir - all files are relative to this directory

destDir - target files live here. if null file names returned by the mapper are assumed to be absolute.

mapper - knows how to construct a target file names from source file names.

granularity - The number of milliseconds leeway to give before deciding a target is out of date.

Throws:

Exception

restrictAsFiles

public File[] restrictAsFiles(String[] files,
                              File srcDir,
                              File destDir,
                              FileNameMapper mapper)
                       throws Exception

Convinience layer on top of restrict that returns the source files as File objects (containing absolute paths if srcDir is absolute).

Throws:

Exception

restrictAsFiles

public File[] restrictAsFiles(String[] files,
                              File srcDir,
                              File destDir,
                              FileNameMapper mapper,
                              long granularity)
                       throws Exception

Convinience layer on top of restrict that returns the source files as File objects (containing absolute paths if srcDir is absolute).

Throws:

Exception

getResource

public Resource getResource(String name)
                     throws Exception

returns resource information for a file at destination

Specified by:

getResource in interface ResourceFactory

Parameters:

name - relative path of file at destination

Returns:

data concerning a file whose relative path to destDir is name

Throws:

Exception