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XML Schema Object Model (XSOM) is a Java library that allows applications to easily parse XML Schema documents and inspect information in them. It is expected to be useful for applications that need to take XML Schema as an input.

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/*
 * Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0, which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

package com.sun.xml.xsom.impl;

/*-
 * #%L
 * XSOM
 * %%
 * Copyright (C) 2019 - 2020 Entur
 * %%
 * Licensed under the EUPL, Version 1.1 or – as soon they will be
 * approved by the European Commission - subsequent versions of the
 * EUPL (the "Licence");
 * 
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * 
 * http://ec.europa.eu/idabc/eupl5
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 * #L%
 */

import com.sun.xml.xsom.XSAttGroupDecl;
import com.sun.xml.xsom.XSAttributeDecl;
import com.sun.xml.xsom.XSComplexType;
import com.sun.xml.xsom.XSContentType;
import com.sun.xml.xsom.XSElementDecl;
import com.sun.xml.xsom.XSIdentityConstraint;
import com.sun.xml.xsom.XSSimpleType;
import com.sun.xml.xsom.XSTerm;
import com.sun.xml.xsom.XSType;

/**
 * Reference to other schema components.
 * 
 * 
 * There are mainly two different types of references. One is
 * the direct reference, which is only possible when schema components
 * are already available when references are made.
 * The other is the lazy reference, which keeps references by names
 * and later look for the component by name.
 * 
 * 
 * This class defines interfaces that define the behavior of such
 * references and classes that implement direct reference semantics.
 * 
 * @author Kohsuke Kawaguchi ([email protected])
 */
public abstract class Ref {
    
    public static interface Term {
        /** Obtains a reference as a term. */
        XSTerm getTerm();
    }

    public static interface Type {
        /** Obtains a reference as a type. */
        XSType getType();
    }

    public static interface ContentType {
        XSContentType getContentType();
    }
    
    public static interface SimpleType extends Ref.Type {
        public XSSimpleType getType();
    }
    
    public static interface ComplexType extends Ref.Type {
        public XSComplexType getType();
    }
    
    public static interface Attribute {
        XSAttributeDecl getAttribute();
    }

    public static interface AttGroup {
        XSAttGroupDecl get();
    }
    
    public static interface Element extends Term {
        XSElementDecl get();
    }

    public static interface IdentityConstraint {
        XSIdentityConstraint get();
    }
//
//    
//    private static void _assert( boolean b ) {
//        if(!b)
//            throw new InternalError("assertion failed");
//    }
}