org.apache.jena.assembler

Class Mode

java.lang.Object

org.apache.jena.assembler.Mode

public class Mode
extends Object

A Mode object controls whether persistent objects can be created or reused by an assembler. Their methods are expected to be called when an assembler is about to create a new object (because no object with the given name exists) or reuse an existing one (because one does).

The default behaviour of the methods is dictated by booleans bound into the mode object. Subclasses of mode may exploit the ability to inspect the name of the object or its other RDF properties.

Field Summary

Fields

Modifier and Type	Field and Description
static Mode	ANY Mode that permits existing objects to be reused and new objects to be created.
static Mode	CREATE Mode that demands a new object be created and no existing object should exist.
static Mode	DEFAULT Default mode; existing objects are reused, new objects are not created
static Mode	REUSE Mode that requires that objects should already exist; new objects cannot be created.

Constructor Summary

Constructors

Constructor and Description
Mode(boolean mayCreate, boolean mayReuse)

Method Summary

Modifier and Type	Method and Description
boolean	permitCreateNew(Resource root, String name) Answer true if the object root with the given name can be created if it does not already exist.
boolean	permitUseExisting(Resource root, String name) Answer true if the existing object root with the given name can be reused.

Methods inherited from class java.lang.Object

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

Field Detail

CREATE

public static final Mode CREATE

Mode that demands a new object be created and no existing object should exist.

DEFAULT

public static final Mode DEFAULT

Default mode; existing objects are reused, new objects are not created

REUSE

public static final Mode REUSE

Mode that requires that objects should already exist; new objects cannot be created.

ANY

public static final Mode ANY

Mode that permits existing objects to be reused and new objects to be created.

Constructor Detail

Mode

public Mode(boolean mayCreate,
            boolean mayReuse)

Method Detail

permitCreateNew

public boolean permitCreateNew(Resource root,
                               String name)

Answer true if the object root with the given name can be created if it does not already exist.

permitUseExisting

public boolean permitUseExisting(Resource root,
                                 String name)

Answer true if the existing object root with the given name can be reused.