/*
 * Copyright (c) 2013, 2014, 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.oracle.truffle.api.object;

public interface BaseLocation {
    /**
     * Get object value as object at this location in store.
     *
     * @param shape the current shape of the object, which must contain this location
     */
    Object get(DynamicObject store, Shape shape);

    /**
     * Get object value as object at this location in store. For internal use only and subject to
     * change, use {@link #get(DynamicObject, Shape)} instead.
     *
     * @param condition the result of a shape check or {@code false}
     * @see #get(DynamicObject, Shape)
     */
    Object get(DynamicObject store, boolean condition);

    /**
     * Set object value at this location in store.
     *
     * @throws IncompatibleLocationException for storage type invalidations
     * @throws FinalLocationException for effectively final fields
     */
    void set(DynamicObject store, Object value) throws IncompatibleLocationException, FinalLocationException;

    /**
     * Set object value at this location in store.
     *
     * @param shape the current shape of the storage object
     * @throws IncompatibleLocationException for storage type invalidations
     * @throws FinalLocationException for effectively final fields
     */
    void set(DynamicObject store, Object value, Shape shape) throws IncompatibleLocationException, FinalLocationException;

    /**
     * Set object value at this location in store and update shape.
     *
     * @param oldShape the shape before the transition
     * @param newShape new shape after the transition
     * @throws IncompatibleLocationException if value is of non-assignable type
     */
    void set(DynamicObject store, Object value, Shape oldShape, Shape newShape) throws IncompatibleLocationException;
}