| /* |
| * 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.xsom.util; |
| |
| import com.sun.xml.internal.xsom.XSType; |
| |
| /** |
| * A simple abstraction for a set of Types that defines containment functions. |
| * |
| * @author <a href="mailto:Ryan.Shoemaker@Sun.COM">Ryan Shoemaker</a>, Sun Microsystems, Inc. |
| */ |
| public abstract class TypeSet { |
| |
| /** |
| * Return true if this TypeSet contains the specified type. |
| * |
| * Concrete implementations of this method determine what it |
| * means for the TypeSet to "contain" a type. |
| * |
| * @param type the type |
| * @return true iff this TypeSet contains the specified type |
| */ |
| public abstract boolean contains(XSType type); |
| |
| /** |
| * Calculate the TypeSet formed by the intersection of two |
| * other TypeSet objects. |
| * |
| * @param a a TypeSet |
| * @param b another TypeSet |
| * @return the intersection of a and b |
| */ |
| public static TypeSet intersection(final TypeSet a, final TypeSet b) { |
| return new TypeSet(){ |
| public boolean contains(XSType type) { |
| return a.contains(type) && b.contains(type); |
| } |
| }; |
| } |
| |
| /** |
| * Calculate the TypeSet formed by the union of two |
| * other TypeSet objects. |
| * |
| * @param a a TypeSet |
| * @param b another TypeSet |
| * @return the union of a and b |
| */ |
| public static TypeSet union(final TypeSet a, final TypeSet b) { |
| return new TypeSet(){ |
| public boolean contains(XSType type) { |
| return a.contains(type) || b.contains(type); |
| } |
| }; |
| } |
| } |