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 * Copyright (c) 1995, 2017, 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 java.applet;

import java.awt.Image;
import java.awt.Graphics;
import java.awt.image.ColorModel;
import java.net.URL;
import java.util.Enumeration;
import java.io.InputStream;
import java.io.IOException;
import java.util.Iterator;

/**
 * This interface corresponds to an applet's environment: the
 * document containing the applet and the other applets in the same
 * document.
 * <p>
 * The methods in this interface can be used by an applet to obtain
 * information about its environment.
 *
 * @author      Arthur van Hoff
 * @since       1.0
 *
 * @deprecated  The Applet API is deprecated. See the
 * <a href="package-summary.html"> java.applet package documentation</a>
 * for further information.
 */

@Deprecated(since = "9")
public interface AppletContext {
    /**
     * Creates an audio clip.
     *
     * @param   url   an absolute URL giving the location of the audio clip.
     * @return  the audio clip at the specified URL.
     */
    AudioClip getAudioClip(URL url);

    /**
     * Returns an {@code Image} object that can then be painted on
     * the screen. The {@code url} argument that is
     * passed as an argument must specify an absolute URL.
     * <p>
     * This method always returns immediately, whether or not the image
     * exists. When the applet attempts to draw the image on the screen,
     * the data will be loaded. The graphics primitives that draw the
     * image will incrementally paint on the screen.
     *
     * @param   url   an absolute URL giving the location of the image.
     * @return  the image at the specified URL.
     * @see     java.awt.Image
     */
    Image getImage(URL url);

    /**
     * Finds and returns the applet in the document represented by this
     * applet context with the given name. The name can be set in the
     * HTML tag by setting the {@code name} attribute.
     *
     * @param   name   an applet name.
     * @return  the applet with the given name, or {@code null} if
     *          not found.
     */
    Applet getApplet(String name);

    /**
     * Finds all the applets in the document represented by this applet
     * context.
     *
     * @return  an enumeration of all applets in the document represented by
     *          this applet context.
     */
    Enumeration<Applet> getApplets();

    /**
     * Requests that the browser or applet viewer show the Web page
     * indicated by the {@code url} argument. The browser or
     * applet viewer determines which window or frame to display the
     * Web page. This method may be ignored by applet contexts that
     * are not browsers.
     *
     * @param   url   an absolute URL giving the location of the document.
     */
    void showDocument(URL url);

    /**
     * Requests that the browser or applet viewer show the Web page
     * indicated by the {@code url} argument. The
     * {@code target} argument indicates in which HTML frame the
     * document is to be displayed.
     * The target argument is interpreted as follows:
     *
     * <table class="striped">
     * <caption>Target arguments and their descriptions</caption>
     * <thead>
     *   <tr>
     *     <th scope="col">Target Argument
     *     <th scope="col">Description
     * </thead>
     * <tbody>
     *   <tr>
     *     <th scope="row">{@code "_self"}
     *     <td>Show in the window and frame that contain the applet.
     *   <tr>
     *     <th scope="row">{@code "_parent"}
     *     <td>Show in the applet's parent frame. If the applet's frame has no
     *     parent frame, acts the same as "_self".
     *   <tr>
     *     <th scope="row">{@code "_top"}
     *     <td>Show in the top-level frame of the applet's window. If the
     *     applet's frame is the top-level frame, acts the same as "_self".
     *   <tr>
     *     <th scope="row">{@code "_blank"}
     *     <td>Show in a new, unnamed top-level window.
     *   <tr>
     *     <th scope="row"><i>name</i>
     *     <td>Show in the frame or window named <i>name</i>. If a target named
     *     <i>name</i> does not already exist, a new top-level window with the
     *     specified name is created, and the document is shown there.
     * </tbody>
     * </table>
     * <p>
     * An applet viewer or browser is free to ignore {@code showDocument}.
     *
     * @param   url   an absolute URL giving the location of the document.
     * @param   target   a {@code String} indicating where to display
     *                   the page.
     */
    public void showDocument(URL url, String target);

    /**
     * Requests that the argument string be displayed in the
     * "status window". Many browsers and applet viewers
     * provide such a window, where the application can inform users of
     * its current state.
     *
     * @param   status   a string to display in the status window.
     */
    void showStatus(String status);

    /**
     * Associates the specified stream with the specified key in this
     * applet context. If the applet context previously contained a mapping
     * for this key, the old value is replaced.
     * <p>
     * For security reasons, mapping of streams and keys exists for each
     * codebase. In other words, applet from one codebase cannot access
     * the streams created by an applet from a different codebase
     *
     * @param key key with which the specified value is to be associated.
     * @param stream stream to be associated with the specified key. If this
     *               parameter is {@code null}, the specified key is removed
     *               in this applet context.
     * @throws IOException if the stream size exceeds a certain
     *         size limit. Size limit is decided by the implementor of this
     *         interface.
     * @since 1.4
     */
    public void setStream(String key, InputStream stream)throws IOException;

    /**
     * Returns the stream to which specified key is associated within this
     * applet context. Returns {@code null} if the applet context contains
     * no stream for this key.
     * <p>
     * For security reasons, mapping of streams and keys exists for each
     * codebase. In other words, applet from one codebase cannot access
     * the streams created by an applet from a different codebase
     *
     * @return the stream to which this applet context maps the key
     * @param key key whose associated stream is to be returned.
     * @since 1.4
     */
    public InputStream getStream(String key);

    /**
     * Finds all the keys of the streams in this applet context.
     * <p>
     * For security reasons, mapping of streams and keys exists for each
     * codebase. In other words, applet from one codebase cannot access
     * the streams created by an applet from a different codebase
     *
     * @return  an Iterator of all the names of the streams in this applet
     *          context.
     * @since 1.4
     */
    public Iterator<String> getStreamKeys();
}