/*
* Copyright 2010-2013 the original author or authors.
*
* 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 org.springframework.data.gemfire.test.support;
import static org.springframework.data.gemfire.util.ArrayUtils.nullSafeArray;
import static org.springframework.data.gemfire.util.CollectionUtils.nullSafeIterable;
import java.io.File;
import java.io.FileFilter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.springframework.util.Assert;
/**
* The {@link FileSystemUtils} class is a utility class encapsulating functionality to process
* file system directories and files collectively.
*
* @author John Blum
* @see java.io.File
* @see java.io.FileFilter
* @see org.springframework.data.gemfire.test.support.FileUtils
* @see org.springframework.data.gemfire.test.support.IOUtils
* @since 1.5.0
*/
@SuppressWarnings("unused")
public abstract class FileSystemUtils extends FileUtils {
public static final File JAVA_HOME = new File(System.getProperty("java.home"));
public static final File JAVA_EXE = new File(new File(JAVA_HOME, "bin"), "java");
public static final File TEMPORARY_DIRECTORY = new File(System.getProperty("java.io.tmpdir"));
public static final File USER_HOME = new File(System.getProperty("user.home"));
public static final File WORKING_DIRECTORY = new File(System.getProperty("user.dir"));
public static final File[] NO_FILES = new File[0];
/* (non-Javadoc) */
public static boolean deleteRecursive(File path) {
return deleteRecursive(path, AllFilesFilter.INSTANCE);
}
/* (non-Javadoc) */
public static boolean deleteRecursive(File path, FileFilter fileFilter) {
boolean success = true;
if (isDirectory(path)) {
for (File file : safeListFiles(path, fileFilter)) {
success &= deleteRecursive(file);
}
}
return ((path == null || path.delete()) && success);
}
// returns sub-directory just below working directory
public static File getRootRelativeToWorkingDirectoryOrPath(File path) {
File localPath = path;
if (isDirectory(localPath)) {
while (localPath != null && !WORKING_DIRECTORY.equals(localPath.getParentFile())) {
localPath = localPath.getParentFile();
}
}
return (localPath != null ? localPath : path);
}
/* (non-Javadoc) */
public static File[] listFiles(File directory, FileFilter fileFilter) {
Assert.isTrue(isDirectory(directory), String.format(
"File [%s] does not refer to a valid directory", directory));
List<File> results = new ArrayList<File>();
for (File file : safeListFiles(directory, fileFilter)) {
if (isDirectory(file)) {
results.addAll(Arrays.asList(listFiles(file, fileFilter)));
}
else {
results.add(file);
}
}
return results.toArray(new File[results.size()]);
}
/* (non-Javadoc) */
public static File[] safeListFiles(File directory) {
return safeListFiles(directory, AllFilesFilter.INSTANCE);
}
/* (non-Javadoc) */
public static File[] safeListFiles(File directory, FileFilter fileFilter) {
FileFilter resolvedFileFilter = (fileFilter != null ? fileFilter : AllFilesFilter.INSTANCE);
File[] files = (isDirectory(directory) ? directory.listFiles(resolvedFileFilter) : null);
return (files != null ? files : NO_FILES);
}
public static class AllFilesFilter implements FileFilter {
public static final AllFilesFilter INSTANCE = new AllFilesFilter();
@Override
public boolean accept(File pathname) {
return true;
}
}
public static class CompositeFileFilter implements FileFilter {
private final FileFilter fileFilterOne;
private final FileFilter fileFilterTwo;
private final LogicalOperator logicalOperator;
private CompositeFileFilter(FileFilter fileFilterOne, LogicalOperator operator, FileFilter fileFilterTwo) {
this.fileFilterOne = fileFilterOne;
this.logicalOperator = operator;
this.fileFilterTwo = fileFilterTwo;
}
protected static FileFilter compose(FileFilter fileFilterOne, LogicalOperator operator, FileFilter fileFilterTwo) {
return (fileFilterOne == null ? fileFilterTwo : (fileFilterTwo == null ? fileFilterOne
: new CompositeFileFilter(fileFilterOne, operator, fileFilterTwo)));
}
public static FileFilter and(FileFilter... fileFilters) {
return and(Arrays.asList(nullSafeArray(fileFilters, FileFilter.class)));
}
public static FileFilter and(Iterable<FileFilter> fileFilters) {
FileFilter current = null;
for (FileFilter fileFilter : nullSafeIterable(fileFilters)) {
current = compose(current, LogicalOperator.AND, fileFilter);
}
return current;
}
public static FileFilter or(FileFilter... fileFilters) {
return or(Arrays.asList(nullSafeArray(fileFilters, FileFilter.class)));
}
public static FileFilter or(Iterable<FileFilter> fileFilters) {
FileFilter current = null;
for (FileFilter fileFilter : nullSafeIterable(fileFilters)) {
current = compose(current, LogicalOperator.OR, fileFilter);
}
return current;
}
@Override
public boolean accept(File pathname) {
switch (this.logicalOperator) {
case AND:
return (fileFilterOne.accept(pathname) && fileFilterTwo.accept(pathname));
case OR:
return (fileFilterOne.accept(pathname) || fileFilterTwo.accept(pathname));
default:
throw new UnsupportedOperationException(String.format(
"Logical operator [%s] is unsupported", this.logicalOperator));
}
}
enum LogicalOperator {
AND, OR;
}
}
public static class DirectoryOnlyFilter implements FileFilter {
public static final DirectoryOnlyFilter INSTANCE = new DirectoryOnlyFilter();
@Override
public boolean accept(File pathname) {
return isDirectory(pathname);
}
}
public static final class FileExtensionFilter extends FileOnlyFilter {
private final String fileExtension;
public static FileExtensionFilter newFileExtensionFilter(String fileExtension) {
return new FileExtensionFilter(fileExtension);
}
public FileExtensionFilter(String fileExtension) {
Assert.hasText(fileExtension, String.format("File extension [%s] must be specified", fileExtension));
this.fileExtension = fileExtension;
}
@Override
public boolean accept(File pathname) {
return (super.accept(pathname) && pathname.getAbsolutePath().toLowerCase().endsWith(this.fileExtension));
}
}
public static class FileOnlyFilter implements FileFilter {
public static final FileOnlyFilter INSTANCE = new FileOnlyFilter();
@Override
public boolean accept(File pathname) {
return isFile(pathname);
}
}
public static class NegatingFileFilter implements FileFilter {
private final FileFilter delegate;
public static NegatingFileFilter newNegatingFileFilter(FileFilter delegate) {
return new NegatingFileFilter(delegate);
}
public NegatingFileFilter(FileFilter delegate) {
Assert.notNull(delegate, "FileFilter must not be null");
this.delegate = delegate;
}
@Override
public boolean accept(File pathname) {
return !this.delegate.accept(pathname);
}
}
}