| /******************************************************************************* |
| * Copyright (c) 2007 IBM Corporation and Others |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Daisuke SATO - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.actf.util.vocab; |
| |
| /** |
| * IOperator interface defines the methods to be implemented by the operator |
| * between propositions. For example, "and operator" and "or operator". |
| */ |
| public interface IOperator extends IProposition { |
| /** |
| * @return the size of the arguments for the operator. |
| */ |
| int size(); |
| |
| /** |
| * @param index |
| * the index of the proposition. |
| * @return the instance specified by the index. |
| */ |
| IProposition get(int index); |
| |
| /** |
| * Add a proposition to the arguments of this operator. |
| * |
| * @param prop |
| * the proposition to be added. |
| */ |
| void add(IProposition prop); |
| } |
