| /* |
| * Copyright (c) 1997, 2022 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.tools.xjc.reader.dtd; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import com.sun.xml.dtdparser.DTDEventListener; |
| |
| |
| /** |
| * @author Kohsuke Kawaguchi |
| */ |
| final class ModelGroup extends Term { |
| enum Kind { |
| CHOICE, SEQUENCE |
| } |
| |
| Kind kind; |
| |
| private final List<Term> terms = new ArrayList<>(); |
| |
| @Override |
| void normalize(List<Block> r, boolean optional) { |
| switch(kind) { |
| case SEQUENCE: |
| for( Term t : terms ) |
| t.normalize(r,optional); |
| return; |
| case CHOICE: |
| Block b = new Block(isOptional()||optional,isRepeated()); |
| addAllElements(b); |
| r.add(b); |
| } |
| } |
| |
| @Override |
| void addAllElements(Block b) { |
| for( Term t : terms ) |
| t.addAllElements(b); |
| } |
| |
| @Override |
| boolean isOptional() { |
| switch(kind) { |
| case SEQUENCE: |
| for( Term t : terms ) |
| if(!t.isOptional()) |
| return false; |
| return true; |
| case CHOICE: |
| for( Term t : terms ) |
| if(t.isOptional()) |
| return true; |
| return false; |
| default: |
| throw new IllegalArgumentException(); |
| } |
| } |
| |
| @Override |
| boolean isRepeated() { |
| switch(kind) { |
| case SEQUENCE: |
| return true; |
| case CHOICE: |
| for( Term t : terms ) |
| if(t.isRepeated()) |
| return true; |
| return false; |
| default: |
| throw new IllegalArgumentException(); |
| } |
| } |
| |
| void setKind(short connectorType) { |
| Kind k; |
| switch(connectorType) { |
| case DTDEventListener.SEQUENCE: |
| k = Kind.SEQUENCE; |
| break; |
| case DTDEventListener.CHOICE: |
| k = Kind.CHOICE; |
| break; |
| default: |
| throw new IllegalArgumentException(); |
| } |
| |
| assert kind==null || k==kind; |
| kind = k; |
| } |
| |
| void addTerm(Term t) { |
| if (t instanceof ModelGroup) { |
| ModelGroup mg = (ModelGroup) t; |
| if(mg.kind==this.kind) { |
| terms.addAll(mg.terms); |
| return; |
| } |
| } |
| terms.add(t); |
| } |
| |
| |
| Term wrapUp() { |
| switch(terms.size()) { |
| case 0: |
| return EMPTY; |
| case 1: |
| assert kind==null; |
| return terms.get(0); |
| default: |
| assert kind!=null; |
| return this; |
| } |
| } |
| |
| } |