    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.File;
    020import java.io.IOException;
    021
    022import javax.activation.DataSource;
    023import javax.activation.FileDataSource;
    024
    025/**
    026 * Creates a {@code DataSource} based on a File. The implementation also resolves file resources.
    027 *
    028 * @since 1.3
    029 */
    030public class DataSourceFileResolver extends DataSourceBaseResolver {
    031
    032    /** The base directory of the resource when resolving relative paths */
    033    private final File baseDir;
    034
    035    /**
    036     * Constructs a new instance.
    037     */
    038    public DataSourceFileResolver() {
    039        baseDir = new File(".");
    040    }
    041
    042    /**
    043     * Constructs a new instance.
    044     *
    045     * @param baseDir the base directory of the resource when resolving relative paths
    046     */
    047    public DataSourceFileResolver(final File baseDir) {
    048        this.baseDir = baseDir;
    049    }
    050
    051    /**
    052     * Constructs a new instance.
    053     *
    054     * @param baseDir the base directory of the resource when resolving relative paths
    055     * @param lenient shall we ignore resources not found or complain with an exception
    056     */
    057    public DataSourceFileResolver(final File baseDir, final boolean lenient) {
    058        super(lenient);
    059        this.baseDir = baseDir;
    060    }
    061
    062    /**
    063     * Gets the base directory used for resolving relative resource locations.
    064     *
    065     * @return the baseUrl
    066     */
    067    public File getBaseDir() {
    068        return baseDir;
    069    }
    070
    071    /** {@inheritDoc} */
    072    @Override
    073    public DataSource resolve(final String resourceLocation) throws IOException {
    074        return resolve(resourceLocation, isLenient());
    075    }
    076
    077    /** {@inheritDoc} */
    078    @Override
    079    public DataSource resolve(final String resourceLocation, final boolean isLenient) throws IOException {
    080        File file;
    081        DataSource result = null;
    082
    083        if (!isCid(resourceLocation)) {
    084            file = new File(resourceLocation);
    085
    086            if (!file.isAbsolute()) {
    087                file = getBaseDir() != null ? new File(getBaseDir(), resourceLocation) : new File(resourceLocation);
    088            }
    089
    090            if (file.exists()) {
    091                result = new FileDataSource(file);
    092            } else if (!isLenient) {
    093                throw new IOException("Cant resolve the following file resource :" + file.getAbsolutePath());
    094            }
    095        }
    096
    097        return result;
    098    }
    099}