Package org.eclipse.core.runtime.preferences

Interface IPreferenceMetadataStore

All Known Implementing Classes:

OsgiPreferenceMetadataStore

public interface IPreferenceMetadataStore

Provides metadata-based access to a preference store.

Since:

3.8

Method Summary

Modifier and Type	Method	Description
<V> boolean	handles(Class<V> valueType)	Checks if this value type can be handled by this preference store.
<V> V	load(PreferenceMetadata<V> preference)	Loads the value of specified preference from an enclosed storage.
<V> void	save(V value, PreferenceMetadata<V> preference)	Saves the value of specified preference to the enclosed storage.

Method Details

handles

<V> boolean handles(Class<V> valueType)

Checks if this value type can be handled by this preference store.

Type Parameters:

V - the value type for the preference

Parameters:

valueType - the value type to be checked

Returns:

true if this value type can be handled by this preference store and false otherwise

load

<V> V load(PreferenceMetadata<V> preference)

Loads the value of specified preference from an enclosed storage. If the value is not found returns the preference default value.

Type Parameters:

V - the value type for the preference

Parameters:

preference - the preference metadata, must not be null.

Returns:

the preference value or default value if preference is unknown

Throws:

UnsupportedOperationException - for unsupported preference value types

See Also:

• handles(Class)
• PreferenceMetadata

save

<V> void save(V value,
 PreferenceMetadata<V> preference)

Saves the value of specified preference to the enclosed storage.

Type Parameters:

V - the value type for the preference

Parameters:

value - to be saved, must not be null.

preference - the preference metadata, must not be null.

Throws:

UnsupportedOperationException - for unsupported preference value types

See Also:

• handles(Class)
• PreferenceMetadata