net.sf.appinfo.reader
Class AbstractManifestReader

java.lang.Object
  net.sf.appinfo.reader.AbstractManifestReader

All Implemented Interfaces:

ManifestReader

Direct Known Subclasses:

FileManifestReader, JarManifestReader, ServletContextManifestReader

public abstract class AbstractManifestReader
extends Object
implements ManifestReader

Abstract ManifestReader implementation with common mechanisms (like synchronization and exception conversion) delegating Manifest initialization to concrete subclasses.

Since:

0.5.2

Author:

Marcin Zajączkowski, 2010-12-21

Constructor Summary

AbstractManifestReader()

Method Summary

Manifest	getManifest() Returns initialized Manifest object.
protected abstract Manifest	initializeAndReturnManifest() Delegated initialization (and return of) Manifest object.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractManifestReader

public AbstractManifestReader()

Method Detail

getManifest

public Manifest getManifest()
                     throws ReaderInitializationException

Returns initialized Manifest object.

Specified by:

getManifest in interface ManifestReader

Returns:

Manifest object

Throws:

ReaderInitializationException - problem with (manifest)reader initialization

initializeAndReturnManifest

protected abstract Manifest initializeAndReturnManifest()
                                                 throws ReaderInitializationException,
                                                        IOException

Delegated initialization (and return of) Manifest object. Should be implemented in concreate classes which create Manifest from data in file, JAR, etc. Throwing IOException isn't very pretty, but it allows to remove duplication and move conversion IOException to ReaderInitializationException to a superclass. It's only internal method in ManifestReader hierarchy and doesn't complicate cooperation with other classes.

Returns:

initialized Manifest object

Throws:

IOException - error during Manifest initialization

ReaderInitializationException - other (no IO) error during Manifest initialization