src/jdk/nashorn/internal/runtime/PropertyAccess.java

/*
 * Copyright (c) 2010, 2013, 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 jdk.nashorn.internal.runtime;

/**
 * Interface for getting and setting properties from script objects
 * This can be a plugin point for e.g. tagged values or alternative
 * array property getters.
 *
 * The interface is engineered with the combinatorially exhaustive
 * combination of types by purpose, for speed, as currently HotSpot is not
 * good enough at removing boxing.
 */
public interface PropertyAccess {
    /**
     * Get the value for a given key and return it as an int
     * @param key the key
     * @param programPoint or INVALID_PROGRAM_POINT if pessimistic
     * @return the value
     */
    public int getInt(Object key, int programPoint);

    /**
     * Get the value for a given key and return it as an int
     * @param key the key
     * @param programPoint or INVALID_PROGRAM_POINT if pessimistic
     * @return the value
     */
    public int getInt(double key, int programPoint);

    /**
     * Get the value for a given key and return it as an int
     * @param key the key
     * @param programPoint or INVALID_PROGRAM_POINT if pessimistic
     * @return the value
     */
    public int getInt(int key, int programPoint);

    /**
     * Get the value for a given key and return it as a double
     * @param key the key
     * @param programPoint or INVALID_PROGRAM_POINT if pessimistic
     * @return the value
     */
    public double getDouble(Object key, int programPoint);

    /**
     * Get the value for a given key and return it as a double
     * @param key the key
     * @param programPoint or INVALID_PROGRAM_POINT if pessimistic
     * @return the value
     */
    public double getDouble(double key, int programPoint);

    /**
     * Get the value for a given key and return it as a double
     * @param key the key
     * @param programPoint or INVALID_PROGRAM_POINT if pessimistic
     * @return the value
     */
    public double getDouble(int key, int programPoint);

    /**
     * Get the value for a given key and return it as an Object
     * @param key the key
     * @return the value
     */
    public Object get(Object key);

    /**
     * Get the value for a given key and return it as an Object
     * @param key the key
     * @return the value
     */
    public Object get(double key);

    /**
     * Get the value for a given key and return it as an Object
     * @param key the key
     * @return the value
     */
    public Object get(int key);

    /**
     * Set the value of a given key
     * @param key     the key
     * @param value   the value
     * @param flags   call site flags
     */
    public void set(Object key, int value, int flags);

    /**
     * Set the value of a given key
     * @param key     the key
     * @param value   the value
     * @param flags   call site flags
     */
    public void set(Object key, double value, int flags);

    /**
     * Set the value of a given key
     * @param key     the key
     * @param value   the value
     * @param flags   call site flags
     */
    public void set(Object key, Object value, int flags);

    /**
     * Set the value of a given key
     * @param key     the key
     * @param value   the value
     * @param flags   call site flags
     */
    public void set(double key, int value, int flags);

    /**
     * Set the value of a given key
     * @param key     the key
     * @param value   the value
     * @param flags   call site flags
     */
    public void set(double key, double value, int flags);

    /**
     * Set the value of a given key
     * @param key     the key
     * @param value   the value
     * @param flags   call site flags
     */
    public void set(double key, Object value, int flags);

    /**
     * Set the value of a given key
     * @param key     the key
     * @param value   the value
     * @param flags   call site flags
     */
    public void set(int key, int value, int flags);

    /**
     * Set the value of a given key
     * @param key     the key
     * @param value   the value
     * @param flags   call site flags
     */
    public void set(int key, double value, int flags);

    /**
     * Set the value of a given key
     * @param key     the key
     * @param value   the value
     * @param flags   call site flags
     */
    public void set(int key, Object value, int flags);

    /**
     * Check if the given key exists anywhere in the proto chain
     * @param key the key
     * @return true if key exists
     */
    public boolean has(Object key);

    /**
     * Check if the given key exists anywhere in the proto chain
     * @param key the key
     * @return true if key exists
     */
    public boolean has(int key);

    /**
     * Check if the given key exists anywhere in the proto chain
     * @param key the key
     * @return true if key exists
     */
    public boolean has(double key);

    /**
     * Check if the given key exists directly in the implementor
     * @param key the key
     * @return true if key exists
     */
    public boolean hasOwnProperty(Object key);

    /**
     * Check if the given key exists directly in the implementor
     * @param key the key
     * @return true if key exists
     */
    public boolean hasOwnProperty(int key);

    /**
     * Check if the given key exists directly in the implementor
     * @param key the key
     * @return true if key exists
     */
    public boolean hasOwnProperty(double key);

    /**
     * Delete a property with the given key from the implementor
     * @param key    the key
     * @param strict are we in strict mode
     * @return true if deletion succeeded, false otherwise
     */
    public boolean delete(int key, boolean strict);

    /**
     * Delete a property with the given key from the implementor
     * @param key    the key
     * @param strict are we in strict mode
     * @return true if deletion succeeded, false otherwise
     */
    public boolean delete(double key, boolean strict);

    /**
     * Delete a property with the given key from the implementor
     * @param key    the key
     * @param strict are we in strict mode
     * @return true if deletion succeeded, false otherwise
     */
    public boolean delete(Object key, boolean strict);
}