1 /* 2 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 /* 26 * Copyright (C) 2004-2015 27 * 28 * Permission is hereby granted, free of charge, to any person obtaining a copy 29 * of this software and associated documentation files (the "Software"), to deal 30 * in the Software without restriction, including without limitation the rights 31 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 32 * copies of the Software, and to permit persons to whom the Software is 33 * furnished to do so, subject to the following conditions: 34 * 35 * The above copyright notice and this permission notice shall be included in 36 * all copies or substantial portions of the Software. 37 * 38 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 39 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 40 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 41 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 42 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 43 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 44 * THE SOFTWARE. 45 */ 46 package com.sun.xml.internal.rngom.digested; 47 48 import java.util.HashMap; 49 import java.util.Iterator; 50 import java.util.Map; 51 52 /** 53 * {@code <grammar>} pattern, which is a collection of named patterns. 54 * 55 * @author Kohsuke Kawaguchi (kk@kohsuke.org) 56 */ 57 public class DGrammarPattern extends DPattern implements Iterable<DDefine> { 58 private final Map<String,DDefine> patterns = new HashMap<String,DDefine>(); 59 60 DPattern start; 61 62 /** 63 * Gets the start pattern. 64 */ 65 public DPattern getStart() { 66 return start; 67 } 68 69 /** 70 * Gets the named pattern by its name. 71 * 72 * @return 73 * null if not found. 74 */ 75 public DDefine get( String name ) { 76 return patterns.get(name); 77 } 78 79 DDefine getOrAdd( String name ) { 80 if(patterns.containsKey(name)) { 81 return get(name); 82 } else { 83 DDefine d = new DDefine(name); 84 patterns.put(name,d); 85 return d; 86 } 87 } 88 89 /** 90 * Iterates all the {@link DDefine}s in this grammar. 91 */ 92 public Iterator<DDefine> iterator() { 93 return patterns.values().iterator(); 94 } 95 96 public boolean isNullable() { 97 return start.isNullable(); 98 } 99 100 public <V> V accept( DPatternVisitor<V> visitor ) { 101 return visitor.onGrammar(this); 102 } 103 }