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 */
017package org.apache.wicket.resource;
018
019import java.io.IOException;
020import java.io.InputStream;
021
022import org.apache.wicket.util.value.ValueMap;
023
024
025/**
026 * Property loaders as used by PropertiesFactory to load properties
027 * 
028 * @author Juergen Donnerstag
029 */
030public interface IPropertiesLoader
031{
032        /**
033         * Load the properties into a ValueMap.
034         * 
035         * @param inputStream
036         * @return Properties. Null if not applicable or not found or ...
037         */
038        ValueMap loadWicketProperties(final InputStream inputStream);
039
040        /**
041         * Load the properties into a java.util.Properties object
042         * 
043         * @param inputStream
044         * @return Properties. Null if not applicable or not found or ...
045         * @throws IOException
046         */
047        java.util.Properties loadJavaProperties(final InputStream inputStream) throws IOException;
048
049        /**
050         * @return The file extension this loader should be applied to
051         */
052        String getFileExtension();
053}