/*

 * Copyright (c) 1997, 2012, 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.tools.internal.xjc.model;

import com.sun.codemodel.internal.JCodeModel;

import com.sun.codemodel.internal.JType;

/**

 * Symbol space for ID/IDREF.

 *

 * In XJC, the whole ID space is considered to be splitted into

 * one or more "symbol space". For an IDREF to match an ID, we impose

 * additional restriction to the one stated in the XML rec.

 *

 * <p>

 * That is, XJC'll require that the IDREF belongs to the same symbol

 * space as the ID. Having this concept allows us to assign more

 * specific type to IDREF.

 *

 * <p>

 * See the design document for detail.

 *

 * @author

 *    <a href="mailto:kohsuke.kawaguchi@sun.com">Kohsuke KAWAGUCHI</a>

 */

public class SymbolSpace

{

    private JType type;

    private final JCodeModel codeModel;

    public SymbolSpace( JCodeModel _codeModel ) {

        this.codeModel = _codeModel;

    }

    /**

     * Gets the Java type of this symbol space.

     *

     * <p>

     * A symbol space is said to have a Java type X if all classes

     * pointed by IDs belonging to this symbol space are assignable

     * to X.

     */

    public JType getType() {

        if(type==null)  return codeModel.ref(Object.class);

        return type;

    }

    public void setType( JType _type ) {

        if( this.type==null )

            this.type = _type;

    }

    public String toString() {

        if(type==null)  return "undetermined";

        else            return type.name();

    }

}