org.eclipse.aether.metadata

Interface Metadata

All Known Subinterfaces:

MergeableMetadata

All Known Implementing Classes:

AbstractMetadata, DefaultMetadata

public interface Metadata

A piece of repository metadata, e.g. an index of available versions. In contrast to an artifact, which usually exists in only one repository, metadata usually exists in multiple repositories and each repository contains a different copy of the metadata. Note: Metadata instances are supposed to be immutable, e.g. any exposed mutator method returns a new metadata instance and leaves the original instance unchanged. Implementors are strongly advised to obey this contract. Note: Implementors are strongly advised to inherit from AbstractMetadata instead of directly implementing this interface.

Restriction:

This interface is not intended to be extended by clients.

Restriction:

This interface is not intended to be implemented by clients.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	Metadata.Nature The nature of the metadata.

Method Summary

Modifier and Type	Method and Description
String	getArtifactId() Gets the artifact identifier of this metadata.
File	getFile() Gets the file of this metadata.
String	getGroupId() Gets the group identifier of this metadata.
Metadata.Nature	getNature() Gets the nature of this metadata.
Map<String,String>	getProperties() Gets the properties of this metadata.
String	getProperty(String key, String defaultValue) Gets the specified property.
String	getType() Gets the type of the metadata, e.g.
String	getVersion() Gets the version of this metadata.
Metadata	setFile(File file) Sets the file of the metadata.
Metadata	setProperties(Map<String,String> properties) Sets the properties for the metadata.

Method Detail

getGroupId

String getGroupId()

Gets the group identifier of this metadata.

Returns:

The group identifier or an empty string if the metadata applies to the entire repository, never null.

getArtifactId

String getArtifactId()

Gets the artifact identifier of this metadata.

Returns:

The artifact identifier or an empty string if the metadata applies to the groupId level only, never null.

getVersion

String getVersion()

Gets the version of this metadata.

Returns:

The version or an empty string if the metadata applies to the groupId:artifactId level only, never null.

getType

String getType()

Gets the type of the metadata, e.g. "maven-metadata.xml".

Returns:

The type of the metadata, never null.

getNature

Metadata.Nature getNature()

Gets the nature of this metadata. The nature indicates to what artifact versions the metadata refers.

Returns:

The nature, never null.

getFile

File getFile()

Gets the file of this metadata. Note that only resolved metadata has a file associated with it.

Returns:

The file or null if none.

setFile

Metadata setFile(File file)

Sets the file of the metadata.

Parameters:

file - The file of the metadata, may be null

Returns:

The new metadata, never null.

getProperty

String getProperty(String key,
                   String defaultValue)

Gets the specified property.

Parameters:

key - The name of the property, must not be null.

defaultValue - The default value to return in case the property is not set, may be null.

Returns:

The requested property value or null if the property is not set and no default value was provided.

getProperties

Map<String,String> getProperties()

Gets the properties of this metadata.

Returns:

The (read-only) properties, never null.

setProperties

Metadata setProperties(Map<String,String> properties)

Sets the properties for the metadata.

Parameters:

properties - The properties for the metadata, may be null.

Returns:

The new metadata, never null.