/*
* Copyright (c) 2005, 2006, Oracle and/or its affiliates. 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package com.sun.xml.internal.xsom.util;
import com.sun.xml.internal.xsom.XSType;
/**
* Perform a transitive closure operation on a type to determine if it
* belongs to this set.
*
* The contains method returns true iff the TypeSet contains an instance
* of the specified XSType or any of the base types of the XSType.
*
* @author <a href="mailto:Ryan.Shoemaker@Sun.COM">Ryan Shoemaker</a>, Sun Microsystems, Inc.
*/
public class TypeClosure extends TypeSet {
private final TypeSet typeSet;
public TypeClosure(TypeSet typeSet) {
this.typeSet = typeSet;
}
/* (non-Javadoc)
* @see com.sun.xml.internal.xsom.util.TypeSet#contains(com.sun.xml.internal.xsom.XSDeclaration)
*
* transitive closure variation on the contains method.
*/
public boolean contains(XSType type) {
if( typeSet.contains(type) ) {
return true;
} else {
XSType baseType = type.getBaseType();
if( baseType == null ) {
return false;
} else {
// climb the super type hierarchy
return contains(baseType);
}
}
}
}