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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed 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 com.android.io;
import java.io.File;
/**
* A folder.
*/
public interface IAbstractFolder extends IAbstractResource {
/**
* Instances of classes that implement this interface are used to
* filter filenames.
*/
public interface FilenameFilter {
/**
* Tests if a specified file should be included in a file list.
*
* @param dir the directory in which the file was found.
* @param name the name of the file.
* @return <code>true</code> if and only if the name should be
* included in the file list; <code>false</code> otherwise.
*/
boolean accept(IAbstractFolder dir, String name);
}
/**
* Returns true if the receiver contains a file with a given name
* @param name the name of the file. This is the name without the path leading to the
* parent folder.
*/
boolean hasFile(String name);
/**
* Returns an {@link IAbstractFile} representing a child of the current folder with the
* given name. The file may not actually exist.
* @param name the name of the file.
*/
IAbstractFile getFile(String name);
/**
* Returns an {@link IAbstractFolder} representing a child of the current folder with the
* given name. The folder may not actually exist.
* @param name the name of the folder.
*/
IAbstractFolder getFolder(String name);
/**
* Returns a list of all existing file and directory members in this folder.
* The returned array can be empty but is never null.
*/
IAbstractResource[] listMembers();
/**
* Returns a list of all existing file and directory members in this folder
* that satisfy the specified filter.
*
* @param filter A filename filter instance. Must not be null.
* @return An array of file names (generated using {@link File#getName()}).
* The array can be empty but is never null.
*/
String[] list(FilenameFilter filter);
}
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