DataSourceBaseResolver.java

/*
 * 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.mail2.jakarta.resolver;

import org.apache.commons.mail2.jakarta.DataSourceResolver;

/**
 * Abstract class for resolvers.
 *
 * @since 1.3
 */
public abstract class DataSourceBaseResolver implements DataSourceResolver {

    /** Whether to ignore resources not found or complain with an exception. */
    private final boolean lenient;

    /**
     * Constructs a new instance.
     */
    public DataSourceBaseResolver() {
        this.lenient = false;
    }

    /**
     * Constructs a new instance.
     *
     * @param lenient shall we ignore resources not found or throw an exception?
     */
    public DataSourceBaseResolver(final boolean lenient) {
        this.lenient = lenient;
    }

    /**
     * Tests whether the argument is a content id.
     *
     * @param resourceLocation the resource location to test.
     * @return true if it is a CID.
     */
    protected boolean isCid(final String resourceLocation) {
        return resourceLocation.startsWith("cid:");
    }

    /**
     * Tests whether this a file URL.
     *
     * @param urlString the URL string.
     * @return true if it is a file URL.
     */
    protected boolean isFileUrl(final String urlString) {
        return urlString.startsWith("file:/");
    }

    /**
     * Tests whether this a HTTP or HTTPS URL.
     *
     * @param urlString the URL string to test.
     * @return true if it is a HTTP or HTTPS URL.
     */
    protected boolean isHttpUrl(final String urlString) {
        return urlString.startsWith("http://") || urlString.startsWith("https://");
    }

    /**
     * Tests whether to ignore resources not found or throw an exception.
     *
     * @return the lenient flag.
     */
    public boolean isLenient() {
        return lenient;
    }
}