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.mail2.jakarta.resolver;
018
019import org.apache.commons.mail2.jakarta.DataSourceResolver;
020
021/**
022 * Abstract class for resolvers.
023 *
024 * @since 1.3
025 */
026public abstract class DataSourceBaseResolver implements DataSourceResolver {
027
028    /** Whether to ignore resources not found or complain with an exception. */
029    private final boolean lenient;
030
031    /**
032     * Constructs a new instance.
033     */
034    public DataSourceBaseResolver() {
035        this.lenient = false;
036    }
037
038    /**
039     * Constructs a new instance.
040     *
041     * @param lenient shall we ignore resources not found or throw an exception?
042     */
043    public DataSourceBaseResolver(final boolean lenient) {
044        this.lenient = lenient;
045    }
046
047    /**
048     * Tests whether the argument is a content id.
049     *
050     * @param resourceLocation the resource location to test.
051     * @return true if it is a CID.
052     */
053    protected boolean isCid(final String resourceLocation) {
054        return resourceLocation.startsWith("cid:");
055    }
056
057    /**
058     * Tests whether this a file URL.
059     *
060     * @param urlString the URL string.
061     * @return true if it is a file URL.
062     */
063    protected boolean isFileUrl(final String urlString) {
064        return urlString.startsWith("file:/");
065    }
066
067    /**
068     * Tests whether this a HTTP or HTTPS URL.
069     *
070     * @param urlString the URL string to test.
071     * @return true if it is a HTTP or HTTPS URL.
072     */
073    protected boolean isHttpUrl(final String urlString) {
074        return urlString.startsWith("http://") || urlString.startsWith("https://");
075    }
076
077    /**
078     * Tests whether to ignore resources not found or throw an exception.
079     *
080     * @return the lenient flag.
081     */
082    public boolean isLenient() {
083        return lenient;
084    }
085}