java/org/apache/tomcat/JarScannerCallback.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.tomcat;

import java.io.File;
import java.io.IOException;
import java.net.JarURLConnection;

/**
 * This interface is implemented by clients of the {@link JarScanner} to enable
 * them to receive notification of a discovered JAR.
 */
public interface JarScannerCallback {

    /**
     * A JAR was found (probably packaged in a WAR) and may be accessed for
     * further processing via the provided URL connection.
     *
     * @param urlConn   The connection to the identified JAR
     * @param isWebapp  Indicates if the JAR was found within a web application.
     *                      If <code>false</code> the JAR should be treated as
     *                      being provided by the container
     */
    public void scan(JarURLConnection urlConn, boolean isWebapp)
            throws IOException;

    /**
     * A JAR was found (probably in an unpacked WAR or possibly elsewhere on the
     * class path) and may be accessed for further processing via the provided
     * file.
     *
     * @param file      The file for the identified JAR.
     * @param isWebapp  Indicates if the JAR was found within a web application.
     *                      If <code>false</code> the JAR should be treated as
     *                      being provided by the container
     */
    public void scan(File file, boolean isWebapp) throws IOException;

    /**
     * A directory structure was found within the web application at
     * /WEB-INF/classes that should be handled as an unpacked JAR. Note that all
     * resource access must be via the ServletContext to ensure that any
     * additional resources are visible.
     */
    public void scanWebInfClasses() throws IOException;
}