Module io.helidon.metadata

Package io.helidon.metadata

Enum Class MetadataDiscovery.Mode

java.lang.Object

java.lang.Enum<MetadataDiscovery.Mode>

io.helidon.metadata.MetadataDiscovery.Mode

All Implemented Interfaces:

Serializable, Comparable<MetadataDiscovery.Mode>, Constable

Enclosing interface:

MetadataDiscovery

public static enum MetadataDiscovery.Mode
extends Enum<MetadataDiscovery.Mode>

Modes of discovery. Can be controlled through system property "io.helidon.metadata.mode".

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
AUTO	Automatic mode, works as follows: If MetadataConstants.MANIFEST_FILE is found, and it is considered merged (more than one line with MetadataConstants.MANIFEST_ID_LINE exists), it is used to discover metadata files. If there is one or less META-INF/MANIFEST.MF files on classpath, classpath discovery is used Classpath discovery using all manifests is used
NONE	Do not do any discovery.
RESOURCES	Uses resources discovered from classpath, expecting duplicate resources.
SCANNING	Discovers metadata files by scanning the file entries defined by the java.class.path and jdk.module.path system properties.

Method Summary

Modifier and Type	Method	Description
static MetadataDiscovery.Mode	valueOf(String name)	Returns the enum constant of this class with the specified name.
static MetadataDiscovery.Mode[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

AUTO

public static final MetadataDiscovery.Mode AUTO

Automatic mode, works as follows:

• If MetadataConstants.MANIFEST_FILE is found, and it is considered merged (more than one line with MetadataConstants.MANIFEST_ID_LINE exists), it is used to discover metadata files.
• If there is one or less META-INF/MANIFEST.MF files on classpath, classpath discovery is used
• Classpath discovery using all manifests is used

RESOURCES

public static final MetadataDiscovery.Mode RESOURCES

Uses resources discovered from classpath, expecting duplicate resources.

NOTE: This approach will not work with unmerged manifests.

SCANNING

public static final MetadataDiscovery.Mode SCANNING

Discovers metadata files by scanning the file entries defined by the java.class.path and jdk.module.path system properties.

NOTE: this adds startup performance overhead, and will not work with unusual classloaders (such as GraalVM native-image).

NONE

public static final MetadataDiscovery.Mode NONE

Do not do any discovery.

Method Details

values

public static MetadataDiscovery.Mode[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static MetadataDiscovery.Mode valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null