1// BEGIN LICENSE BLOCK
2// Version: CMPL 1.1
3//
4// The contents of this file are subject to the Cisco-style Mozilla Public
5// License Version 1.1 (the "License"); you may not use this file except
6// in compliance with the License.  You may obtain a copy of the License
7// at www.eclipse-clp.org/license.
8//
9// Software distributed under the License is distributed on an "AS IS"
10// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See
11// the License for the specific language governing rights and limitations
12// under the License.
13//
14// The Original Code is  The ECLiPSe Constraint Logic Programming System.
15// The Initial Developer of the Original Code is  Cisco Systems, Inc.
16// Portions created by the Initial Developer are
17// Copyright (C) 2006 Cisco Systems, Inc.  All Rights Reserved.
18//
19// Contributor(s):
20//
21// END LICENSE BLOCK
22
23package com.parctechnologies.eclipse.visualisation;
24
25/**
26 * Interface for objects which can produce new viewers when viewables are
27 * created.
28 */
29public interface ViewerFactory
30{
31    /**
32     * The ViewerFactory must be able to say, given a ViewableType, whether or
33     * not it can build a viewer from it. The ability to build the viewer can
34     * therefore depend only on the number and fixity of the dimensions and the
35     * element type.
36     */
37    boolean canBuildFrom(ViewableType viewableType);
38
39    /**
40     * The contract for this method is to instantiate Viewer and initialise it
41     * as much as is possible given the basic information in the Viewable.
42     * Further initialisation of viewers comes later when the viewer has had a
43     * chance to execute some preEventGoals.
44     */
45    Viewer build(Viewable viewable);
46}
47
48