DownloadManager

Class DownloadManager

java.lang.Object
  DownloadManager

public class DownloadManager
extends java.lang.Object
extends java.lang.Object

This class manages the process of downloading a set of sound resources from the internet. The class makes the SoundDownloads available to other classes incrementally as they become available. This allows an application to start using the sound files which are available without waiting for the whole download process to complete.

See Also:: DataFile, SoundDownload, Record etc

Field Summary
`private SoundDownload[]`	`badDownloads` represents those downloads which were not successful
`private SoundDownload[]`	`freshDownloads` This set contains those SoundDownloads which have been downloaded since another class has called the getFreshDownloads method
`private SoundDownload[]`	`goodDownloads` represents those downloads which were successful
`private boolean`	`hasFreshDownloads` This flag gets set when a new language sound file is successfully downloaded
`private Record[]`	`records` A set of data records which represent information about language sound files.

Constructor Summary
`DownloadManager()`
`DownloadManager(Record[] dataRecords)`

Method Summary
`SoundDownload[]`	`getFreshDownloads()` Returns a set of SoundDownload objects which can be used by the sound playing loop.
`boolean`	`hasFreshDownloads()` allows another class to know if this class has download new sound files and if it is worth calling the getFreshDownloads method
`static void`	`main(java.lang.String[] args)`
`java.lang.String`	`print()`
`java.lang.String`	`printStatistics()` allows the display of information about all the attempts to download resources from the internet.
`void`	`startDownloading()` Starts the process of downloading sound files from the internet.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

records

private Record[] records

A set of data records which represent information about language sound files. This may be only a subset of those contained in the DataFile

goodDownloads

private SoundDownload[] goodDownloads

represents those downloads which were successful

badDownloads

private SoundDownload[] badDownloads

represents those downloads which were not successful

freshDownloads

private SoundDownload[] freshDownloads

This set contains those SoundDownloads which have been downloaded since another class has called the getFreshDownloads method

hasFreshDownloads

private boolean hasFreshDownloads

This flag gets set when a new language sound file is successfully downloaded

Constructor Detail

DownloadManager

public DownloadManager(Record[] dataRecords)

DownloadManager

public DownloadManager()

Method Detail

hasFreshDownloads

public boolean hasFreshDownloads()

allows another class to know if this class has download new sound files and if it is worth calling the getFreshDownloads method

getFreshDownloads

public SoundDownload[] getFreshDownloads()

Returns a set of SoundDownload objects which can be used by the sound playing loop.

startDownloading

public void startDownloading()

Starts the process of downloading sound files from the internet. This should work as a background process so that the user does not have to wait for all the sound files to download before he or she starts to listen to them. This method is one of the main reasons I had for writing this program in java; namely that I wanted a threaded process so as to improve the users experience. The

print

public java.lang.String print()

printStatistics

public java.lang.String printStatistics()

allows the display of information about all the attempts to download resources from the internet.

main

public static void main(java.lang.String[] args)
                 throws java.lang.Exception

Throws:: java.lang.Exception

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