/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2011 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.xml.bind.v2.model.impl;

import javax.xml.namespace.QName;

import com.sun.xml.bind.v2.model.core.NonElement;
import com.sun.xml.bind.v2.model.core.PropertyInfo;
import com.sun.xml.bind.v2.model.core.TypeRef;

/**
 * @author Kohsuke Kawaguchi
 */
class TypeRefImpl<TypeT,ClassDeclT> implements TypeRef<TypeT,ClassDeclT> {
    private final QName elementName;
    private final TypeT type;
    protected final ElementPropertyInfoImpl<TypeT,ClassDeclT,?,?> owner;
    private NonElement<TypeT,ClassDeclT> ref;
    private final boolean isNillable;
    private String defaultValue;

    public TypeRefImpl(ElementPropertyInfoImpl<TypeT, ClassDeclT, ?, ?> owner, QName elementName, TypeT type, boolean isNillable, String defaultValue) {
        this.owner = owner;
        this.elementName = elementName;
        this.type = type;
        this.isNillable = isNillable;
        this.defaultValue = defaultValue;
        assert owner!=null;
        assert elementName!=null;
        assert type!=null;
    }

    public NonElement<TypeT,ClassDeclT> getTarget() {
        if(ref==null)
            calcRef();
        return ref;
    }

    public QName getTagName() {
        return elementName;
    }

    public boolean isNillable() {
        return isNillable;
    }

    public String getDefaultValue() {
        return defaultValue;
    }

    protected void link() {
        // if we have'nt computed the ref yet, do so now.
        calcRef();
    }

    private void calcRef() {
        // we can't do this eagerly because of a cyclic dependency
        ref = owner.parent.builder.getTypeInfo(type,owner);
        assert ref!=null;
    }

    public PropertyInfo<TypeT,ClassDeclT> getSource() {
        return owner;
    }
}