    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *     http://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 * Unless required by applicable law or agreed to in writing, software
    012 * distributed under the License is distributed on an "AS IS" BASIS,
    013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 * See the License for the specific language governing permissions and
    015 * limitations under the License.
    016 */
    017
    018package org.apache.commons.configuration2.web;
    019
    020import java.applet.Applet;
    021import java.util.Arrays;
    022import java.util.Iterator;
    023import java.util.Objects;
    024
    025/**
    026 * A configuration wrapper to read applet parameters. This configuration is read only, adding or removing a property
    027 * will throw an UnsupportedOperationException.
    028 *
    029 * @since 1.1
    030 */
    031public class AppletConfiguration extends BaseWebConfiguration {
    032
    033    /** Stores the wrapped applet. */
    034    protected Applet applet;
    035
    036    /**
    037     * Create an AppletConfiguration using the initialization parameters of the specified Applet.
    038     *
    039     * @param applet the applet
    040     */
    041    public AppletConfiguration(final Applet applet) {
    042        this.applet = Objects.requireNonNull(applet, "applet");
    043    }
    044
    045    @Override
    046    protected Iterator<String> getKeysInternal() {
    047        final String[][] paramsInfo = applet.getParameterInfo();
    048        final String[] keys = new String[paramsInfo != null ? paramsInfo.length : 0];
    049        if (paramsInfo != null) {
    050            for (int i = 0; i < keys.length; i++) {
    051                keys[i] = paramsInfo[i][0];
    052            }
    053        }
    054        return Arrays.asList(keys).iterator();
    055    }
    056
    057    @Override
    058    protected Object getPropertyInternal(final String key) {
    059        return handleDelimiters(applet.getParameter(key));
    060    }
    061}