Package org.eclipse.osgi.service.resolver

Interface VersionConstraint

All Superinterfaces:

Cloneable

All Known Subinterfaces:

BundleSpecification, GenericSpecification, HostSpecification, ImportPackageSpecification, NativeCodeSpecification

public interface VersionConstraint
extends Cloneable

VersionConstraints represent the relationship between two bundles (in the case of bundle requires) or a bundle and a package (in the case of import/export).

This interface is not intended to be implemented by clients. The StateObjectFactory should be used to construct instances.

Since:

3.1

Restriction:

This interface is not intended to be implemented by clients.

Method Summary

Modifier and Type	Method	Description
BundleDescription	getBundle()	Returns the bundle that declares this constraint.
String	getName()	Returns this constraint's name.
BundleRequirement	getRequirement()	Returns the requirement represented by this constraint.
BaseDescription	getSupplier()	Returns the supplier that satisfies this constraint, if it is resolved.
Object	getUserObject()	Returns the user object associated to this constraint, or null if none exists.
VersionRange	getVersionRange()	Returns the version range for this constraint.
boolean	isResolved()	Returns whether this constraint is resolved.
boolean	isSatisfiedBy(BaseDescription supplier)	Returns whether this constraint could be satisfied by the given supplier.
void	setUserObject(Object userObject)	Associates a user-provided object to this constraint, or removes an existing association, if null is provided.

Method Details

getName

String getName()

Returns this constraint's name.

Returns:

this constraint's name

getVersionRange

VersionRange getVersionRange()

Returns the version range for this constraint.

Returns:

the version range for this constraint, or null

getBundle

BundleDescription getBundle()

Returns the bundle that declares this constraint.

Returns:

a bundle description

isResolved

boolean isResolved()

Returns whether this constraint is resolved. A resolved constraint is guaranteed to have its supplier defined.

Returns:

true if this bundle is resolved, false otherwise

isSatisfiedBy

boolean isSatisfiedBy(BaseDescription supplier)

Returns whether this constraint could be satisfied by the given supplier. This will depend on the suppliers different attributes including its name, versions and other arbitrary attributes

Parameters:

supplier - a supplier to be tested against this constraint (may be null)

Returns:

true if this constraint could be resolved using the supplier, false otherwise

getSupplier

BaseDescription getSupplier()

Returns the supplier that satisfies this constraint, if it is resolved.

Returns:

a supplier, or null

See Also:

• isResolved()

getRequirement

BundleRequirement getRequirement()

Returns the requirement represented by this constraint. Some constraint types may not be able to represent a requirement. In such cases null is returned.

Returns:

the requirement represented by this constraint

Since:

3.7

getUserObject

Object getUserObject()

Returns the user object associated to this constraint, or null if none exists.

Returns:

the user object associated to this constraint, or null

Since:

3.8

setUserObject

void setUserObject(Object userObject)

Associates a user-provided object to this constraint, or removes an existing association, if null is provided. The provided object is not interpreted in any ways by this constrain.

Parameters:

userObject - an arbitrary object provided by the user, or null

Since:

3.8