aoqi@0: /*
aoqi@0:  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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aoqi@0:  * This code is free software; you can redistribute it and/or modify it
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aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: /*
aoqi@0:  * Copyright (C) 2004-2011
aoqi@0:  *
aoqi@0:  * Permission is hereby granted, free of charge, to any person obtaining a copy
aoqi@0:  * of this software and associated documentation files (the "Software"), to deal
aoqi@0:  * in the Software without restriction, including without limitation the rights
aoqi@0:  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
aoqi@0:  * copies of the Software, and to permit persons to whom the Software is
aoqi@0:  * furnished to do so, subject to the following conditions:
aoqi@0:  *
aoqi@0:  * The above copyright notice and this permission notice shall be included in
aoqi@0:  * all copies or substantial portions of the Software.
aoqi@0:  *
aoqi@0:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
aoqi@0:  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
aoqi@0:  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
aoqi@0:  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
aoqi@0:  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
aoqi@0:  * THE SOFTWARE.
aoqi@0:  */
aoqi@0: package com.sun.xml.internal.rngom.digested;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * @author Kohsuke Kawaguchi (kk@kohsuke.org)
aoqi@0:  */
aoqi@0: public class DPatternWalker implements DPatternVisitor<Void> {
aoqi@0:     public Void onAttribute(DAttributePattern p) {
aoqi@0:         return onXmlToken(p);
aoqi@0:     }
aoqi@0: 
aoqi@0:     protected Void onXmlToken(DXmlTokenPattern p) {
aoqi@0:         return onUnary(p);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public Void onChoice(DChoicePattern p) {
aoqi@0:         return onContainer(p);
aoqi@0:     }
aoqi@0: 
aoqi@0:     protected Void onContainer(DContainerPattern p) {
aoqi@0:         for( DPattern c=p.firstChild(); c!=null; c=c.next )
aoqi@0:             c.accept(this);
aoqi@0:         return null;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public Void onData(DDataPattern p) {
aoqi@0:         return null;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public Void onElement(DElementPattern p) {
aoqi@0:         return onXmlToken(p);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public Void onEmpty(DEmptyPattern p) {
aoqi@0:         return null;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public Void onGrammar(DGrammarPattern p) {
aoqi@0:         return p.getStart().accept(this);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public Void onGroup(DGroupPattern p) {
aoqi@0:         return onContainer(p);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public Void onInterleave(DInterleavePattern p) {
aoqi@0:         return onContainer(p);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public Void onList(DListPattern p) {
aoqi@0:         return onUnary(p);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public Void onMixed(DMixedPattern p) {
aoqi@0:         return onUnary(p);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public Void onNotAllowed(DNotAllowedPattern p) {
aoqi@0:         return null;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public Void onOneOrMore(DOneOrMorePattern p) {
aoqi@0:         return onUnary(p);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public Void onOptional(DOptionalPattern p) {
aoqi@0:         return onUnary(p);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public Void onRef(DRefPattern p) {
aoqi@0:         return p.getTarget().getPattern().accept(this);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public Void onText(DTextPattern p) {
aoqi@0:         return null;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public Void onValue(DValuePattern p) {
aoqi@0:         return null;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public Void onZeroOrMore(DZeroOrMorePattern p) {
aoqi@0:         return onUnary(p);
aoqi@0:     }
aoqi@0: 
aoqi@0:     protected Void onUnary(DUnaryPattern p) {
aoqi@0:         return p.getChild().accept(this);
aoqi@0:     }
aoqi@0: }