    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.commons.mail.resolver;
    018
    019import java.io.IOException;
    020import java.nio.file.Files;
    021import java.nio.file.OpenOption;
    022import java.nio.file.Path;
    023import java.nio.file.Paths;
    024
    025import javax.activation.DataSource;
    026import javax.activation.FileTypeMap;
    027
    028import org.apache.commons.mail.activation.PathDataSource;
    029
    030/**
    031 * Creates a {@link DataSource} based on a {@link Path}. The implementation also resolves file resources.
    032 *
    033 * @since 1.6.0
    034 */
    035public final class DataSourcePathResolver extends DataSourceBaseResolver {
    036
    037    /** The base directory of the resource when resolving relative paths */
    038    private final Path baseDir;
    039    private final OpenOption[] options;
    040
    041    /**
    042     * Constructs a new instance.
    043     */
    044    public DataSourcePathResolver() {
    045        this(Paths.get("."));
    046    }
    047
    048    /**
    049     * Constructs a new instance.
    050     *
    051     * @param baseDir the base directory of the resource when resolving relative paths
    052     */
    053    public DataSourcePathResolver(final Path baseDir) {
    054        this(baseDir, false);
    055    }
    056
    057    /**
    058     * Constructs a new instance.
    059     *
    060     * @param baseDir the base directory of the resource when resolving relative paths
    061     * @param lenient shall we ignore resources not found or complain with an exception
    062     * @param options options for opening streams.
    063     */
    064    public DataSourcePathResolver(final Path baseDir, final boolean lenient, final OpenOption... options) {
    065        super(lenient);
    066        this.baseDir = baseDir;
    067        this.options = options;
    068    }
    069
    070    /**
    071     * Gets the base directory used for resolving relative resource locations.
    072     *
    073     * @return the baseUrl
    074     */
    075    public Path getBaseDir() {
    076        return baseDir;
    077    }
    078
    079    /** {@inheritDoc} */
    080    @Override
    081    public DataSource resolve(final String resourceLocation) throws IOException {
    082        return resolve(resourceLocation, isLenient());
    083    }
    084
    085    /** {@inheritDoc} */
    086    @Override
    087    public DataSource resolve(final String resourceLocation, final boolean isLenient) throws IOException {
    088        Path file;
    089        DataSource result = null;
    090
    091        if (!isCid(resourceLocation)) {
    092            file = Paths.get(resourceLocation);
    093
    094            if (!file.isAbsolute()) {
    095                file = getBaseDir() != null ? getBaseDir().resolve(resourceLocation) : Paths.get(resourceLocation);
    096            }
    097
    098            if (Files.exists(file)) {
    099                result = new PathDataSource(file, FileTypeMap.getDefaultFileTypeMap(), options);
    100            } else if (!isLenient) {
    101                throw new IOException("Cant resolve the following file resource :" + file.toAbsolutePath());
    102            }
    103        }
    104
    105        return result;
    106    }
    107}