/*

 * 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.codemodel.internal;

/**

 * Field Reference

 */

public class JFieldRef extends JExpressionImpl implements JAssignmentTarget {

    /**

     * Object expression upon which this field will be accessed, or

     * null for the implicit 'this'.

     */

    private JGenerable object;

    /**

     * Name of the field to be accessed. Either this or {@link #var} is set.

     */

    private String name;

    /**

     * Variable to be accessed.

     */

    private JVar var;

    /**

     * Indicates if an explicit this should be generated

     */

    private boolean explicitThis;

    /**

     * Field reference constructor given an object expression and field name

     *

     * @param object

     *        JExpression for the object upon which

     *        the named field will be accessed,

     *

     * @param name

     *        Name of field to access

     */

    JFieldRef(JExpression object, String name) {

        this(object, name, false);

    }

    JFieldRef(JExpression object, JVar v) {

        this(object, v, false);

    }

    /**

     * Static field reference.

     */

    JFieldRef(JType type, String name) {

        this(type, name, false);

    }

    JFieldRef(JType type, JVar v) {

        this(type, v, false);

    }

    JFieldRef(JGenerable object, String name, boolean explicitThis) {

        this.explicitThis = explicitThis;

        this.object = object;

        if (name.indexOf('.') >= 0)

            throw new IllegalArgumentException("Field name contains '.': " + name);

        this.name = name;

    }

    JFieldRef(JGenerable object, JVar var, boolean explicitThis) {

        this.explicitThis = explicitThis;

        this.object = object;

        this.var = var;

    }

    public void generate(JFormatter f) {

        String name = this.name;

        if(name==null)  name=var.name();

        if (object != null) {

            f.g(object).p('.').p(name);

        } else {

            if (explicitThis) {

                f.p("this.").p(name);

            } else {

                f.id(name);

            }

        }

    }

    public JExpression assign(JExpression rhs) {

        return JExpr.assign(this, rhs);

    }

    public JExpression assignPlus(JExpression rhs) {

        return JExpr.assignPlus(this, rhs);

    }

}