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;
023
024/**
025 * A configuration wrapper to read applet parameters. This configuration is read only, adding or removing a property
026 * will throw an UnsupportedOperationException.
027 *
028 * @since 1.1
029 */
030public class AppletConfiguration extends BaseWebConfiguration {
031    /** Stores the wrapped applet. */
032    protected Applet applet;
033
034    /**
035     * Create an AppletConfiguration using the initialization parameters of the specified Applet.
036     *
037     * @param applet the applet
038     */
039    public AppletConfiguration(final Applet applet) {
040        this.applet = applet;
041    }
042
043    @Override
044    protected Object getPropertyInternal(final String key) {
045        return handleDelimiters(applet.getParameter(key));
046    }
047
048    @Override
049    protected Iterator<String> getKeysInternal() {
050        final String[][] paramsInfo = applet.getParameterInfo();
051        final String[] keys = new String[paramsInfo != null ? paramsInfo.length : 0];
052        if (paramsInfo != null) {
053            for (int i = 0; i < keys.length; i++) {
054                keys[i] = paramsInfo[i][0];
055            }
056        }
057        return Arrays.asList(keys).iterator();
058    }
059}