/*
 * Copyright (c) 2006-2011 Nuxeo SA (http://nuxeo.com/) and others.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Nuxeo - initial API and implementation
 *
 * $Id$
 */

package org.eclipse.ecr.core.query.sql.model;


/**
 * A named reference to a variable (this can be a field or table).
 *
 * @author  <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
 *
 */
public class Reference implements Operand {

    private static final long serialVersionUID = -1725102431543210429L;

    public final String name;

    public Reference(String name) {
        this.name = name;
    }

    @Override
    public void accept(IVisitor visitor) {
        visitor.visitReference(this);
    }

    @Override
    public String toString() {
        return name;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (obj instanceof Reference) {
            return name.contentEquals(((Reference) obj).name);
        }
        return false;
    }

    @Override
    public int hashCode() {
        return name.hashCode();
    }

    public boolean isPathReference() {
        return false;
    }
}