| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.commons.mail.resolver; |
| |
| import javax.activation.DataSource; |
| import javax.activation.URLDataSource; |
| import java.io.IOException; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| |
| /** |
| * Creates a {@code DataSource} based on an URL. |
| * |
| * @since 1.3 |
| */ |
| public class DataSourceUrlResolver extends DataSourceBaseResolver |
| { |
| /** the base url of the resource when resolving relative paths */ |
| private final URL baseUrl; |
| |
| /** |
| * Constructor. |
| * |
| * @param baseUrl the base URL used for resolving relative resource locations |
| */ |
| public DataSourceUrlResolver(final URL baseUrl) |
| { |
| super(); |
| this.baseUrl = baseUrl; |
| } |
| |
| /** |
| * Constructor. |
| * |
| * @param baseUrl the base URL used for resolving relative resource locations |
| * @param lenient shall we ignore resources not found or complain with an exception |
| */ |
| public DataSourceUrlResolver(final URL baseUrl, final boolean lenient) |
| { |
| super(lenient); |
| this.baseUrl = baseUrl; |
| } |
| |
| /** |
| * Get the base URL used for resolving relative resource locations. |
| * |
| * @return the baseUrl |
| */ |
| public URL getBaseUrl() |
| { |
| return baseUrl; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public DataSource resolve(final String resourceLocation) throws IOException |
| { |
| return resolve(resourceLocation, isLenient()); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public DataSource resolve(final String resourceLocation, final boolean isLenient) throws IOException |
| { |
| DataSource result = null; |
| |
| try |
| { |
| if (!isCid(resourceLocation)) |
| { |
| final URL url = createUrl(resourceLocation); |
| result = new URLDataSource(url); |
| result.getInputStream(); |
| } |
| |
| return result; |
| } |
| catch (final IOException e) |
| { |
| if (isLenient) |
| { |
| return null; |
| } |
| throw e; |
| } |
| } |
| |
| /** |
| * Create an URL based on a base URL and a resource location suitable for loading |
| * the resource. |
| * |
| * @param resourceLocation a resource location |
| * @return the corresponding URL |
| * @throws java.net.MalformedURLException creating the URL failed |
| */ |
| protected URL createUrl(final String resourceLocation) throws MalformedURLException |
| { |
| // if we get an non-existing base url than the resource can |
| // be directly used to create an URL |
| if (baseUrl == null) |
| { |
| return new URL(resourceLocation); |
| } |
| |
| // if we get an non-existing location what we shall do? |
| if (resourceLocation == null || resourceLocation.length() == 0) |
| { |
| throw new IllegalArgumentException("No resource defined"); |
| } |
| |
| // if we get a stand-alone resource than ignore the base url |
| if (isFileUrl(resourceLocation) || isHttpUrl(resourceLocation)) |
| { |
| return new URL(resourceLocation); |
| } |
| |
| return new URL(getBaseUrl(), resourceLocation.replaceAll("&", "&")); |
| } |
| } |