Thu, 31 Aug 2017 15:18:52 +0800
merge
1 /*
2 * Copyright (c) 1997, 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 */
26 package com.sun.xml.internal.xsom.util;
28 import com.sun.xml.internal.xsom.XSType;
30 /**
31 * Perform a transitive closure operation on a type to determine if it
32 * belongs to this set.
33 *
34 * The contains method returns true if the TypeSet contains an instance
35 * of the specified XSType or any of the base types of the XSType.
36 *
37 * @author <a href="mailto:Ryan.Shoemaker@Sun.COM">Ryan Shoemaker</a>, Sun Microsystems, Inc.
38 */
39 public class TypeClosure extends TypeSet {
41 private final TypeSet typeSet;
43 public TypeClosure(TypeSet typeSet) {
44 this.typeSet = typeSet;
45 }
47 /* (non-Javadoc)
48 * @see com.sun.xml.internal.xsom.util.TypeSet#contains(com.sun.xml.internal.xsom.XSDeclaration)
49 *
50 * transitive closure variation on the contains method.
51 */
52 public boolean contains(XSType type) {
53 if( typeSet.contains(type) ) {
54 return true;
55 } else {
56 XSType baseType = type.getBaseType();
57 if( baseType == null ) {
58 return false;
59 } else {
60 // climb the super type hierarchy
61 return contains(baseType);
62 }
63 }
64 }
66 }