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}