1/* 2 * Copyright (c) 1997, 2012, 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 26package com.sun.xml.internal.xsom.util; 27 28import com.sun.xml.internal.xsom.XSType; 29 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 */ 39public class TypeClosure extends TypeSet { 40 41 private final TypeSet typeSet; 42 43 public TypeClosure(TypeSet typeSet) { 44 this.typeSet = typeSet; 45 } 46 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 } 65 66} 67