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/*******************************************************************************
* Copyright 2011 See AUTHORS file.
*
* 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.badlogic.gdx.jnigen;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
/** Represents a file or directory on the filesystem or classpath. Taken from libgdx's FileHandle.
* @author mzechner
* @author Nathan Sweet */
public class FileDescriptor {
/** Indicates how to resolve a path to a file.
* @author mzechner
* @author Nathan Sweet */
public enum FileType {
/** Path relative to the root of the classpath. Classpath files are always readonly. Note that classpath files are not
* compatible with some functionality on Android, such as Audio#newSound(FileHandle) and Audio#newMusic(FileHandle). */
Classpath,
/** Path that is a fully qualified, absolute filesystem path. To ensure portability across platforms use absolute files only
* when absolutely (heh) necessary. */
Absolute;
}
protected File file;
protected FileType type;
protected FileDescriptor () {
}
/** Creates a new absolute FileHandle for the file name. Use this for tools on the desktop that don't need any of the backends.
* Do not use this constructor in case you write something cross-platform. Use the Files interface instead.
* @param fileName the filename. */
public FileDescriptor (String fileName) {
this.file = new File(fileName);
this.type = FileType.Absolute;
}
/** Creates a new absolute FileHandle for the {@link File}. Use this for tools on the desktop that don't need any of the
* backends. Do not use this constructor in case you write something cross-platform. Use the Files interface instead.
* @param file the file. */
public FileDescriptor (File file) {
this.file = file;
this.type = FileType.Absolute;
}
protected FileDescriptor (String fileName, FileType type) {
this.type = type;
file = new File(fileName);
}
protected FileDescriptor (File file, FileType type) {
this.file = file;
this.type = type;
}
public String path () {
return file.getPath().replace('\\', '/');
}
public String name () {
return file.getName();
}
public String extension () {
String name = file.getName();
int dotIndex = name.lastIndexOf('.');
if (dotIndex == -1) return "";
return name.substring(dotIndex + 1);
}
public String nameWithoutExtension () {
String name = file.getName();
int dotIndex = name.lastIndexOf('.');
if (dotIndex == -1) return name;
return name.substring(0, dotIndex);
}
public FileType type () {
return type;
}
/** Returns a java.io.File that represents this file handle. Note the returned file will only be usable for
* {@link FileType#Absolute} and FileType#External file handles. */
public File file () {
return file;
}
/** Returns a stream for reading this file as bytes.
* @throw RuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public InputStream read () {
if (type == FileType.Classpath && !file.exists()) {
InputStream input = FileDescriptor.class.getResourceAsStream("/" + file.getPath().replace('\\', '/'));
if (input == null) throw new RuntimeException("File not found: " + file + " (" + type + ")");
return input;
}
try {
return new FileInputStream(file());
} catch (FileNotFoundException ex) {
if (file().isDirectory())
throw new RuntimeException("Cannot open a stream to a directory: " + file + " (" + type + ")", ex);
throw new RuntimeException("Error reading file: " + file + " (" + type + ")", ex);
}
}
/** Returns a reader for reading this file as characters.
* @throw RuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public Reader reader () {
return new InputStreamReader(read());
}
/** Returns a reader for reading this file as characters.
* @throw RuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public Reader reader (String charset) {
try {
return new InputStreamReader(read(), charset);
} catch (UnsupportedEncodingException ex) {
throw new RuntimeException("Error reading file: " + this, ex);
}
}
/** Returns a buffered reader for reading this file as characters.
* @throw RuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public BufferedReader reader (int bufferSize) {
return new BufferedReader(new InputStreamReader(read()), bufferSize);
}
/** Returns a buffered reader for reading this file as characters.
* @throw RuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public BufferedReader reader (int bufferSize, String charset) {
try {
return new BufferedReader(new InputStreamReader(read(), charset), bufferSize);
} catch (UnsupportedEncodingException ex) {
throw new RuntimeException("Error reading file: " + this, ex);
}
}
/** Reads the entire file into a string using the platform's default charset.
* @throw RuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public String readString () {
return readString(null);
}
/** Reads the entire file into a string using the specified charset.
* @throw RuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public String readString (String charset) {
StringBuilder output = new StringBuilder(512);
InputStreamReader reader = null;
try {
if (charset == null)
reader = new InputStreamReader(read());
else
reader = new InputStreamReader(read(), charset);
char[] buffer = new char[256];
while (true) {
int length = reader.read(buffer);
if (length == -1) break;
output.append(buffer, 0, length);
}
} catch (IOException ex) {
throw new RuntimeException("Error reading layout file: " + this, ex);
} finally {
try {
if (reader != null) reader.close();
} catch (IOException ignored) {
}
}
return output.toString();
}
/** Reads the entire file into a byte array.
* @throw RuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public byte[] readBytes () {
int length = (int)length();
if (length == 0) length = 512;
byte[] buffer = new byte[length];
int position = 0;
InputStream input = read();
try {
while (true) {
int count = input.read(buffer, position, buffer.length - position);
if (count == -1) break;
position += count;
if (position == buffer.length) {
// Grow buffer.
byte[] newBuffer = new byte[buffer.length * 2];
System.arraycopy(buffer, 0, newBuffer, 0, position);
buffer = newBuffer;
}
}
} catch (IOException ex) {
throw new RuntimeException("Error reading file: " + this, ex);
} finally {
try {
if (input != null) input.close();
} catch (IOException ignored) {
}
}
if (position < buffer.length) {
// Shrink buffer.
byte[] newBuffer = new byte[position];
System.arraycopy(buffer, 0, newBuffer, 0, position);
buffer = newBuffer;
}
return buffer;
}
/** Reads the entire file into the byte array. The byte array must be big enough to hold the file's data.
* @param bytes the array to load the file into
* @param offset the offset to start writing bytes
* @param size the number of bytes to read, see {@link #length()}
* @return the number of read bytes */
public int readBytes (byte[] bytes, int offset, int size) {
InputStream input = read();
int position = 0;
try {
while (true) {
int count = input.read(bytes, offset + position, size - position);
if (count <= 0) break;
position += count;
}
} catch (IOException ex) {
throw new RuntimeException("Error reading file: " + this, ex);
} finally {
try {
if (input != null) input.close();
} catch (IOException ignored) {
}
}
return position - offset;
}
/** Returns a stream for writing to this file. Parent directories will be created if necessary.
* @param append If false, this file will be overwritten if it exists, otherwise it will be appended.
* @throw RuntimeException if this file handle represents a directory, if it is a {@link FileType#Classpath} or
* FileType#Internal file, or if it could not be written. */
public OutputStream write (boolean append) {
if (type == FileType.Classpath) throw new RuntimeException("Cannot write to a classpath file: " + file);
parent().mkdirs();
try {
return new FileOutputStream(file(), append);
} catch (FileNotFoundException ex) {
if (file().isDirectory())
throw new RuntimeException("Cannot open a stream to a directory: " + file + " (" + type + ")", ex);
throw new RuntimeException("Error writing file: " + file + " (" + type + ")", ex);
}
}
/** Reads the remaining bytes from the specified stream and writes them to this file. The stream is closed. Parent directories
* will be created if necessary.
* @param append If false, this file will be overwritten if it exists, otherwise it will be appended.
* @throw RuntimeException if this file handle represents a directory, if it is a {@link FileType#Classpath} or
* FileType#Internal file, or if it could not be written. */
public void write (InputStream input, boolean append) {
OutputStream output = null;
try {
output = write(append);
byte[] buffer = new byte[4096];
while (true) {
int length = input.read(buffer);
if (length == -1) break;
output.write(buffer, 0, length);
}
} catch (Exception ex) {
throw new RuntimeException("Error stream writing to file: " + file + " (" + type + ")", ex);
} finally {
try {
if (input != null) input.close();
} catch (Exception ignored) {
}
try {
if (output != null) output.close();
} catch (Exception ignored) {
}
}
}
/** Returns a writer for writing to this file using the default charset. Parent directories will be created if necessary.
* @param append If false, this file will be overwritten if it exists, otherwise it will be appended.
* @throw RuntimeException if this file handle represents a directory, if it is a {@link FileType#Classpath} or
* FileType#Internal file, or if it could not be written. */
public Writer writer (boolean append) {
return writer(append, null);
}
/** Returns a writer for writing to this file. Parent directories will be created if necessary.
* @param append If false, this file will be overwritten if it exists, otherwise it will be appended.
* @param charset May be null to use the default charset.
* @throw RuntimeException if this file handle represents a directory, if it is a {@link FileType#Classpath} or
* FileType#Internal file, or if it could not be written. */
public Writer writer (boolean append, String charset) {
if (type == FileType.Classpath) throw new RuntimeException("Cannot write to a classpath file: " + file);
parent().mkdirs();
try {
FileOutputStream output = new FileOutputStream(file(), append);
if (charset == null)
return new OutputStreamWriter(output);
else
return new OutputStreamWriter(output, charset);
} catch (IOException ex) {
if (file().isDirectory())
throw new RuntimeException("Cannot open a stream to a directory: " + file + " (" + type + ")", ex);
throw new RuntimeException("Error writing file: " + file + " (" + type + ")", ex);
}
}
/** Writes the specified string to the file using the default charset. Parent directories will be created if necessary.
* @param append If false, this file will be overwritten if it exists, otherwise it will be appended.
* @throw RuntimeException if this file handle represents a directory, if it is a {@link FileType#Classpath} or
* FileType#Internal file, or if it could not be written. */
public void writeString (String string, boolean append) {
writeString(string, append, null);
}
/** Writes the specified string to the file as UTF-8. Parent directories will be created if necessary.
* @param append If false, this file will be overwritten if it exists, otherwise it will be appended.
* @param charset May be null to use the default charset.
* @throw RuntimeException if this file handle represents a directory, if it is a {@link FileType#Classpath} or
* FileType#Internal file, or if it could not be written. */
public void writeString (String string, boolean append, String charset) {
Writer writer = null;
try {
writer = writer(append, charset);
writer.write(string);
} catch (Exception ex) {
throw new RuntimeException("Error writing file: " + file + " (" + type + ")", ex);
} finally {
try {
if (writer != null) writer.close();
} catch (Exception ignored) {
}
}
}
/** Writes the specified bytes to the file. Parent directories will be created if necessary.
* @param append If false, this file will be overwritten if it exists, otherwise it will be appended.
* @throw RuntimeException if this file handle represents a directory, if it is a {@link FileType#Classpath} or
* FileType#Internal file, or if it could not be written. */
public void writeBytes (byte[] bytes, boolean append) {
OutputStream output = write(append);
try {
output.write(bytes);
} catch (IOException ex) {
throw new RuntimeException("Error writing file: " + file + " (" + type + ")", ex);
} finally {
try {
output.close();
} catch (IOException ignored) {
}
}
}
/** Returns the paths to the children of this directory. Returns an empty list if this file handle represents a file and not a
* directory. On the desktop, an FileType#Internal handle to a directory on the classpath will return a zero length array.
* @throw RuntimeException if this file is an {@link FileType#Classpath} file. */
public FileDescriptor[] list () {
if (type == FileType.Classpath) throw new RuntimeException("Cannot list a classpath directory: " + file);
String[] relativePaths = file().list();
if (relativePaths == null) return new FileDescriptor[0];
FileDescriptor[] handles = new FileDescriptor[relativePaths.length];
for (int i = 0, n = relativePaths.length; i < n; i++)
handles[i] = child(relativePaths[i]);
return handles;
}
/** Returns the paths to the children of this directory with the specified suffix. Returns an empty list if this file handle
* represents a file and not a directory. On the desktop, an FileType#Internal handle to a directory on the classpath will
* return a zero length array.
* @throw RuntimeException if this file is an {@link FileType#Classpath} file. */
public FileDescriptor[] list (String suffix) {
if (type == FileType.Classpath) throw new RuntimeException("Cannot list a classpath directory: " + file);
String[] relativePaths = file().list();
if (relativePaths == null) return new FileDescriptor[0];
FileDescriptor[] handles = new FileDescriptor[relativePaths.length];
int count = 0;
for (int i = 0, n = relativePaths.length; i < n; i++) {
String path = relativePaths[i];
if (!path.endsWith(suffix)) continue;
handles[count] = child(path);
count++;
}
if (count < relativePaths.length) {
FileDescriptor[] newHandles = new FileDescriptor[count];
System.arraycopy(handles, 0, newHandles, 0, count);
handles = newHandles;
}
return handles;
}
/** Returns true if this file is a directory. Always returns false for classpath files. On Android, an FileType#Internal handle
* to an empty directory will return false. On the desktop, an FileType#Internal handle to a directory on the classpath will
* return false. */
public boolean isDirectory () {
if (type == FileType.Classpath) return false;
return file().isDirectory();
}
/** Returns a handle to the child with the specified name.
* @throw RuntimeException if this file handle is a {@link FileType#Classpath} or FileType#Internal and the child doesn't
* exist. */
public FileDescriptor child (String name) {
if (file.getPath().length() == 0) return new FileDescriptor(new File(name), type);
return new FileDescriptor(new File(file, name), type);
}
public FileDescriptor parent () {
File parent = file.getParentFile();
if (parent == null) {
if (type == FileType.Absolute)
parent = new File("/");
else
parent = new File("");
}
return new FileDescriptor(parent, type);
}
/** @throw RuntimeException if this file handle is a {@link FileType#Classpath} or FileType#Internal file. */
public boolean mkdirs () {
if (type == FileType.Classpath) throw new RuntimeException("Cannot mkdirs with a classpath file: " + file);
return file().mkdirs();
}
/** Returns true if the file exists. On Android, a {@link FileType#Classpath} or FileType#Internal handle to a directory will
* always return false. */
public boolean exists () {
if (type == FileType.Classpath) return FileDescriptor.class.getResource("/" + file.getPath().replace('\\', '/')) != null;
return file().exists();
}
/** Deletes this file or empty directory and returns success. Will not delete a directory that has children.
* @throw RuntimeException if this file handle is a {@link FileType#Classpath} or FileType#Internal file. */
public boolean delete () {
if (type == FileType.Classpath) throw new RuntimeException("Cannot delete a classpath file: " + file);
return file().delete();
}
/** Deletes this file or directory and all children, recursively.
* @throw RuntimeException if this file handle is a {@link FileType#Classpath} or FileType#Internal file. */
public boolean deleteDirectory () {
if (type == FileType.Classpath) throw new RuntimeException("Cannot delete a classpath file: " + file);
return deleteDirectory(file());
}
/** Copies this file or directory to the specified file or directory. If this handle is a file, then 1) if the destination is a
* file, it is overwritten, or 2) if the destination is a directory, this file is copied into it, or 3) if the destination
* doesn't exist, {@link #mkdirs()} is called on the destination's parent and this file is copied into it with a new name. If
* this handle is a directory, then 1) if the destination is a file, RuntimeException is thrown, or 2) if the destination is a
* directory, this directory is copied recursively into it as a subdirectory, overwriting existing files, or 3) if the
* destination doesn't exist, {@link #mkdirs()} is called on the destination and this directory is copied recursively into it
* as a subdirectory.
* @throw RuntimeException if the destination file handle is a {@link FileType#Classpath} or FileType#Internal file, or copying
* failed. */
public void copyTo (FileDescriptor dest) {
if (!isDirectory()) {
if (dest.isDirectory()) dest = dest.child(name());
copyFile(this, dest);
return;
}
if (dest.exists()) {
if (!dest.isDirectory()) throw new RuntimeException("Destination exists but is not a directory: " + dest);
} else {
dest.mkdirs();
if (!dest.isDirectory()) throw new RuntimeException("Destination directory cannot be created: " + dest);
}
dest = dest.child(name());
copyDirectory(this, dest);
}
/** Moves this file to the specified file, overwriting the file if it already exists.
* @throw RuntimeException if the source or destination file handle is a {@link FileType#Classpath} or FileType#Internal file. */
public void moveTo (FileDescriptor dest) {
if (type == FileType.Classpath) throw new RuntimeException("Cannot move a classpath file: " + file);
copyTo(dest);
delete();
}
/** Returns the length in bytes of this file, or 0 if this file is a directory, does not exist, or the size cannot otherwise be
* determined. */
public long length () {
if (type == FileType.Classpath || !file.exists()) {
InputStream input = read();
try {
return input.available();
} catch (Exception ignored) {
} finally {
try {
input.close();
} catch (IOException ignored) {
}
}
return 0;
}
return file().length();
}
/** Returns the last modified time in milliseconds for this file. Zero is returned if the file doesn't exist. Zero is returned
* for {@link FileType#Classpath} files. On Android, zero is returned for FileType#Internal files. On the desktop, zero is
* returned for FileType#Internal files on the classpath. */
public long lastModified () {
return file().lastModified();
}
public String toString () {
return file.getPath();
}
static public FileDescriptor tempFile (String prefix) {
try {
return new FileDescriptor(File.createTempFile(prefix, null));
} catch (IOException ex) {
throw new RuntimeException("Unable to create temp file.", ex);
}
}
static public FileDescriptor tempDirectory (String prefix) {
try {
File file = File.createTempFile(prefix, null);
if (!file.delete()) throw new IOException("Unable to delete temp file: " + file);
if (!file.mkdir()) throw new IOException("Unable to create temp directory: " + file);
return new FileDescriptor(file);
} catch (IOException ex) {
throw new RuntimeException("Unable to create temp file.", ex);
}
}
static private boolean deleteDirectory (File file) {
if (file.exists()) {
File[] files = file.listFiles();
if (files != null) {
for (int i = 0, n = files.length; i < n; i++) {
if (files[i].isDirectory())
deleteDirectory(files[i]);
else
files[i].delete();
}
}
}
return file.delete();
}
static private void copyFile (FileDescriptor source, FileDescriptor dest) {
try {
dest.write(source.read(), false);
} catch (Exception ex) {
throw new RuntimeException("Error copying source file: " + source.file + " (" + source.type + ")\n" //
+ "To destination: " + dest.file + " (" + dest.type + ")", ex);
}
}
static private void copyDirectory (FileDescriptor sourceDir, FileDescriptor destDir) {
destDir.mkdirs();
FileDescriptor[] files = sourceDir.list();
for (int i = 0, n = files.length; i < n; i++) {
FileDescriptor srcFile = files[i];
FileDescriptor destFile = destDir.child(srcFile.name());
if (srcFile.isDirectory())
copyDirectory(srcFile, destFile);
else
copyFile(srcFile, destFile);
}
}
}
