| /* |
| * Copyright (C) 2004-2011 |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| package com.sun.tools.rngom.digested; |
| |
| import java.util.Iterator; |
| |
| |
| /** |
| * A pattern that can contain other patterns. |
| * |
| * @author Kohsuke Kawaguchi (kk@kohsuke.org) |
| */ |
| public abstract class DContainerPattern extends DPattern implements Iterable<DPattern> { |
| private DPattern head; |
| private DPattern tail; |
| |
| public DPattern firstChild() { |
| return head; |
| } |
| |
| public DPattern lastChild() { |
| return tail; |
| } |
| |
| public int countChildren() { |
| int i=0; |
| for( DPattern p=firstChild(); p!=null; p=p.next) |
| i++; |
| return i; |
| } |
| |
| public Iterator<DPattern> iterator() { |
| return new Iterator<>() { |
| DPattern next = head; |
| |
| public boolean hasNext() { |
| return next != null; |
| } |
| |
| public DPattern next() { |
| DPattern r = next; |
| next = next.next; |
| return r; |
| } |
| |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| }; |
| } |
| |
| void add( DPattern child ) { |
| if(tail==null) { |
| child.prev = child.next = null; |
| head = tail = child; |
| } else { |
| child.prev = tail; |
| tail.next = child; |
| child.next = null; |
| tail = child; |
| } |
| } |
| } |