| /* |
| * Copyright (c) 1997, 2021 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0, which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| package com.sun.xml.xsom; |
| |
| import com.sun.xml.xsom.visitor.XSTermFunction; |
| import com.sun.xml.xsom.visitor.XSTermVisitor; |
| import com.sun.xml.xsom.visitor.XSTermFunctionWithParam; |
| |
| /** |
| * A component that can be referenced from {@link XSParticle} |
| * |
| * This interface provides a set of type check functions (<code>isXXX</code>), |
| * which are essentially: |
| * |
| * <pre> |
| * boolean isXXX() { |
| * return this instanceof XXX; |
| * } |
| * </pre> |
| * |
| * and a set of cast functions (<code>asXXX</code>), which are |
| * essentially: |
| * |
| * <pre> |
| * XXX asXXX() { |
| * if(isXXX()) return (XXX)this; |
| * else return null; |
| * } |
| * </pre> |
| */ |
| public interface XSTerm extends XSComponent |
| { |
| void visit( XSTermVisitor visitor ); |
| <T> T apply( XSTermFunction<T> function ); |
| <T,P> T apply( XSTermFunctionWithParam<T,P> function, P param ); |
| |
| // cast functions |
| boolean isWildcard(); |
| boolean isModelGroupDecl(); |
| boolean isModelGroup(); |
| boolean isElementDecl(); |
| |
| XSWildcard asWildcard(); |
| XSModelGroupDecl asModelGroupDecl(); |
| XSModelGroup asModelGroup(); |
| XSElementDecl asElementDecl(); |
| } |