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/*
* Copyright (C) 2011 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.ant;
import java.io.File;
import java.util.Set;
public class InputPath {
private final File mFile;
/**
* A set of extensions. Only files with an extension in this set will
* be considered for a modification check. All deleted/created files will still be
* checked.
*/
private final Set<String> mTouchedExtensions;
public InputPath(File file) {
this(file, null);
}
public InputPath(File file, Set<String> extensionsToCheck) {
if (file == null) {
throw new RuntimeException("File in InputPath(File) can't be null");
}
mFile = file;
mTouchedExtensions = extensionsToCheck;
}
public File getFile() {
return mFile;
}
/**
* Returns whether this input path (likely actually a folder) must check this files for
* modification (all files are checked for add/delete).
*
* This is configured by constructing the {@link InputPath} with additional restriction
* parameters such as specific extensions.
* @param file the file to check
* @return true if the file must be checked for modification.
*/
public boolean checksForModification(File file) {
if (ignores(file)) {
return false;
}
if (mTouchedExtensions != null &&
mTouchedExtensions.contains(getExtension(file)) == false) {
return false;
}
return true;
}
/**
* Returns whether the InputPath ignores a given file or folder. If it is ignored then
* the file (or folder) is not checked for any event (modification/add/delete).
* If it's a folder, then it and its content are completely ignored.
* @param file the file or folder to check
* @return true if the file or folder are ignored.
*/
public boolean ignores(File file) {
// always ignore hidden files/folders.
return file.getName().startsWith(".");
}
/**
* Gets the extension (if present) on a file by looking at the filename
* @param file the file to get the extension from
* @return the extension if present, or the empty string if the filename doesn't have
* and extension.
*/
protected static String getExtension(File file) {
return getExtension(file.getName());
}
/**
* Gets the extension (if present) on a file by looking at the filename
* @param fileName the filename to get the extension from
* @return the extension if present, or the empty string if the filename doesn't have
* and extension.
*/
protected static String getExtension(String fileName) {
int index = fileName.lastIndexOf('.');
if (index == -1) {
return "";
}
// Don't include the leading '.' in the extension
return fileName.substring(index + 1);
}
}
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