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/*
* 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.catalina;
import java.io.InputStream;
import java.net.URL;
import java.util.Set;
/**
* Represents a set of resources that are part of a web application. Examples
* include a directory structure, a resources JAR and a WAR file.
*/
public interface WebResourceSet extends Lifecycle {
/**
* Obtain the object that represents the resource at the given path. Note
* the resource at that path may not exist.
*
* @param path The path for the resource of interest relative to the root
* of the web application. It must start with '/'.
*
* @return The object that represents the resource at the given path
*/
WebResource getResource(String path);
/**
* Obtain the list of the names of all of the files and directories located
* in the specified directory.
*
* @param path The path for the resource of interest relative to the root
* of the web application. It must start with '/'.
*
* @return The list of resources. If path does not refer to a directory
* then a zero length array will be returned.
*/
String[] list(String path);
/**
* Obtain the Set of the web applications pathnames of all of the files and
* directories located in the specified directory. Paths representing
* directories will end with a "/" character.
*
* @param path The path for the resource of interest relative to the root
* of the web application. It must start with '/'.
*
* @return The Set of resources. If path does not refer to a directory
* then an empty set will be returned.
*/
Set listWebAppPaths(String path);
/**
* Create a new directory at the given path.
*
* @param path The path for the new resource to create relative to the root
* of the web application. It must start with '/'.
*
* @return true if the directory was created, otherwise
* false
*/
boolean mkdir(String path);
/**
* Create a new resource at the requested path using the provided
* InputStream.
*
* @param path The path to be used for the new Resource. It is relative
* to the root of the web application and must start with
* '/'.
* @param is The InputStream that will provide the content for the
* new Resource.
* @param overwrite If true and the resource already exists it
* will be overwritten. If false and the
* resource already exists the write will fail.
*
* @return true if and only if the new Resource is written
*/
boolean write(String path, InputStream is, boolean overwrite);
void setRoot(WebResourceRoot root);
/**
* Should resources returned by this resource set only be included in any
* results when the lookup is explicitly looking for class loader resources.
* i.e. should these resources be excluded from look ups that are explicitly
* looking for static (non-class loader) resources.
*
* @return true if these resources should only be used for
* class loader resource lookups, otherwise false
*/
boolean getClassLoaderOnly();
void setClassLoaderOnly(boolean classLoaderOnly);
/**
* Should resources returned by this resource set only be included in any
* results when the lookup is explicitly looking for static (non-class
* loader) resources. i.e. should these resources be excluded from look ups
* that are explicitly looking for class loader resources.
*
* @return true if these resources should only be used for
* static (non-class loader) resource lookups, otherwise
* false
*/
boolean getStaticOnly();
void setStaticOnly(boolean staticOnly);
/**
* Obtain the base URL for this set of resources. One of the uses of this is
* to grant read permissions to the resources when running under a security
* manager.
*
* @return The base URL for this set of resources
*/
URL getBaseUrl();
/**
* Configures whether or not this set of resources is read-only.
*
* @param readOnly true if this set of resources should be
* configured to be read-only
*
* @throws IllegalArgumentException if an attempt is made to configure a
* {@link WebResourceSet} that is hard-coded to be read-only as
* writable
*/
void setReadOnly(boolean readOnly);
/**
* Obtains the current value of the read-only setting for this set of
* resources.
*
* @return true if this set of resources is configured to be
* read-only, otherwise false
*/
boolean isReadOnly();
/**
* Implementations may cache some information to improve performance. This
* method triggers the clean-up of those resources.
*/
void gc();
}