Package org.apache.juneau.commons.settings

Class ManifestFilePropertySource

java.lang.Object

org.apache.juneau.commons.settings.ManifestFilePropertySource

All Implemented Interfaces:

PropertySource

public class ManifestFilePropertySource
extends Object
implements PropertySource

Property source backed by ManifestFile.

Constructor Summary

Constructors

Constructor	Description
ManifestFilePropertySource(Supplier<ManifestFile> manifestSupplier)	Constructor.

Method Summary

Modifier and Type	Method	Description
static ManifestFilePropertySource	createDefault()	Creates a source with default classloader scanning behavior.
PropertyLookupResult	get(String name)	Returns a property in this property source.

Methods inherited from class java.lang.Object

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

Constructor Details

ManifestFilePropertySource

public ManifestFilePropertySource(Supplier<ManifestFile> manifestSupplier)

Constructor.

The supplied manifestSupplier is wrapped in a Memoizer so the manifest is loaded at most once per source instance. Without this, every get(String) call would re-scan the classpath, which is very expensive and shows up as a 2x test-suite regression when this source is registered in Settings.

Parameters:

manifestSupplier - The supplier for manifest file. Must not be null.

Method Details

createDefault

public static ManifestFilePropertySource createDefault()

Creates a source with default classloader scanning behavior.

Returns:

A new source.

get

public PropertyLookupResult get(String name)

Description copied from interface: PropertySource

Returns a property in this property source.

Specified by:

get in interface PropertySource

Parameters:

name - The property name.

Returns:

The property lookup result:

• PropertyLookupResult.missing() if this source does not define the key.
• PropertyLookupResult.present(Optional) with Optional.empty() if the key exists with a null value.
• PropertyLookupResult.present(Optional) with a value if the key exists with a non-null value.