| /* |
| * Copyright 2005-2006 Sun Microsystems, Inc. All Rights Reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Sun designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Sun in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| */ |
| package com.sun.xml.internal.rngom.binary; |
| |
| import com.sun.xml.internal.rngom.binary.visitor.PatternFunction; |
| import com.sun.xml.internal.rngom.binary.visitor.PatternVisitor; |
| |
| public class EmptyPattern extends Pattern { |
| EmptyPattern() { |
| super(true, EMPTY_CONTENT_TYPE, EMPTY_HASH_CODE); |
| } |
| boolean samePattern(Pattern other) { |
| return other instanceof EmptyPattern; |
| } |
| public void accept(PatternVisitor visitor) { |
| visitor.visitEmpty(); |
| } |
| public Object apply(PatternFunction f) { |
| return f.caseEmpty(this); |
| } |
| void checkRestrictions(int context, DuplicateAttributeDetector dad, Alphabet alpha) |
| throws RestrictionViolationException { |
| switch (context) { |
| case DATA_EXCEPT_CONTEXT: |
| throw new RestrictionViolationException("data_except_contains_empty"); |
| case START_CONTEXT: |
| throw new RestrictionViolationException("start_contains_empty"); |
| } |
| } |
| } |