001/*
002 *  Licensed to the Apache Software Foundation (ASF) under one
003 *  or more contributor license agreements.  See the NOTICE file
004 *  distributed with this work for additional information
005 *  regarding copyright ownership.  The ASF licenses this file
006 *  to you under the Apache License, Version 2.0 (the
007 *  "License"); you may not use this file except in compliance
008 *  with the License.  You may obtain a copy of the License at
009 *
010 *        http://www.apache.org/licenses/LICENSE-2.0
011 *
012 *  Unless required by applicable law or agreed to in writing,
013 *  software distributed under the License is distributed on an
014 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 *  KIND, either express or implied.  See the License for the
016 *  specific language governing permissions and limitations
017 *  under the License.
018 */
019
020package org.apache.isis.core.webapp.config;
021
022import java.io.IOException;
023import java.io.InputStream;
024
025import javax.servlet.ServletContext;
026
027import org.apache.isis.core.commons.lang.StringExtensions;
028import org.apache.isis.core.commons.resource.ResourceStreamSourceAbstract;
029
030public class ResourceStreamSourceForWebInf extends ResourceStreamSourceAbstract {
031
032    public static final String DEFAULT_WEBINF_DIRECTORY = "/WEB-INF";
033
034    private final ServletContext servletContext;
035    private final String configurationDirectory;
036
037    public ResourceStreamSourceForWebInf(final ServletContext servletContext) {
038        this(servletContext, DEFAULT_WEBINF_DIRECTORY);
039    }
040
041    public ResourceStreamSourceForWebInf(final ServletContext servletContext, final String configurationDirectory) {
042        this.servletContext = servletContext;
043        this.configurationDirectory = configurationDirectory;
044    }
045
046    @Override
047    public String getName() {
048        return "servlet context ('" + configurationDirectory + "')";
049    }
050
051    @Override
052    public InputStream doReadResource(final String resourcePath) throws IOException {
053        final String fullyQualifiedResourcePath = StringExtensions.combinePath(configurationDirectory, resourcePath);
054        return servletContext.getResourceAsStream(fullyQualifiedResourcePath);
055    }
056
057}