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Copy pathFile.java
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2168 lines (1815 loc) · 75.4 KB
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package javaxt.io;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.WritableByteChannel;
import java.io.*;
import java.util.Locale;
//******************************************************************************
//** File Class
//******************************************************************************
/**
* Used to represent a single file on a file system. In many ways, this class
* is an extension of the java.io.File class. However, unlike the java.io.File
* class, this object provides functions that are relevant and specific to
* files (not directories).
*
******************************************************************************/
public class File implements Comparable {
private java.io.File file; //<--DO NOT USE DIRECTLY! Use getFile() instead.
private String name = "";
private String path = "";
private FileAttributes attr;
private long lastAttrUpdate = 0;
public final String PathSeparator = System.getProperty("file.separator");
public final String LineSeperator = System.getProperty("line.separator");
private static final boolean isWindows = Directory.isWindows;
private int bufferSize = 1024*1024; //1MB
//public static final boolean jni = loadDLL();
//**************************************************************************
//** Constructor
//**************************************************************************
/** Creates a new File instance by converting the given pathname string into
* an abstract pathname.
*/
public File(String Path) {
if (Path == null) {
throw new NullPointerException();
}
if (Path.startsWith("\"") && Path.endsWith("\"")){
Path = Path.substring(1,Path.length()-1).trim();
}
if (Path.endsWith("\\") || Path.endsWith("/")){
throw new IllegalArgumentException("Invalid Path: " + Path);
}
init(Path);
//int idx = Path.replace("\\", "/").lastIndexOf("/")+1;
//path = Path.substring(0, idx);
//name = Path.substring(idx);
}
//**************************************************************************
//** Constructor
//**************************************************************************
/** Instantiates this class using a java.io.File. Please use the Directory
* class for directories. Example:
* <pre>if (file.isDirectory()) new Directory(file);</pre>
*/
public File(java.io.File File) {
if (File==null) {
throw new NullPointerException();
}
if (File.isDirectory()){
throw new IllegalArgumentException("Invalid Path.");
}
String p = File.getAbsolutePath();
init(p);
if (p.equals(toString())){
this.file = File;
}
}
//**************************************************************************
//** Constructor
//**************************************************************************
/** Creates a new File instance from a parent abstract pathname and a child
* pathname string.
*/
public File(java.io.File Parent, String Child){
this(Parent.getPath(), Child);
}
public File(Directory Parent, String Child){
this(Parent.getPath(), Child);
}
public File(String Parent, String Child){
if (Parent == null || Child == null) {
throw new NullPointerException();
}
//Normalize the strings
Parent = Parent.replace("\\", "/");
Child = Child.replace("\\", "/");
//Combine the Parent and Child into a single path. This is done in
//case the Child variable contains additional path information.
if (!Parent.endsWith("/")) Parent += "/";
if (Child.startsWith("/")) Child = Child.substring(1);
if (Child.endsWith("/")) Child = Child.substring(0, Child.length()-1);
init(Parent + Child);
}
/** Used to parse the absolute path to the file. For performance reasons,
* we do not rely on the java.io.File to determine the path and name
* variables.
*/
private void init(String Path){
Path = Path.replace("\\", "/");
String[] arr = Path.split("/");
if (arr.length>1){
name = arr[arr.length-1];
path = Path.substring(0, Path.lastIndexOf(name));
}
else{
name = arr[0];
path = "./";
}
if (path.isEmpty()) path = PathSeparator;
else path = path.replace("/", PathSeparator);
if (!path.endsWith(PathSeparator)) path += PathSeparator;
//Special case for relative paths
if (path.startsWith(".")){
try{
init(new java.io.File(path + name).getCanonicalPath());
}
catch(Exception e){
throw new IllegalArgumentException("Invalid Path.");
}
}
}
//**************************************************************************
//** Get File Name
//**************************************************************************
/** Returns the name of the file, excluding the path. */
public String getName(){
return name;
}
//**************************************************************************
//** Get File Name
//**************************************************************************
/** Returns the name of the file, excluding the path.
*
* @param IncludeFileExtension If true, includes the file extension.
* Otherwise, will return the file name without the extension.
*/
public String getName(boolean IncludeFileExtension){
if (!IncludeFileExtension){
int idx = name.lastIndexOf(".");
if (idx > -1) return name.substring(0, idx);
}
return name;
}
//**************************************************************************
//** Get File Path
//**************************************************************************
/** Used to retrieve the path to the file, excluding the file name. Appends
* a file separator to the end of the string.
*/
public String getPath(){
return path;
}
//**************************************************************************
//** Get Directory
//**************************************************************************
/** Returns the file's parent directory. Same as getParentDirectory() */
public Directory getDirectory(){
return getParentDirectory();
}
//**************************************************************************
//** Get Parent Directory
//**************************************************************************
/** Returns the file's parent directory. Returns null if the parent
* directory is unknown.
*/
public Directory getParentDirectory(){
if (path.length()>0) return new Directory(path);
else return null;
}
//**************************************************************************
//** toFile
//**************************************************************************
/** Returns the java.io.File representation of this object. */
public java.io.File toFile(){
return getFile();
}
//**************************************************************************
//** getFile
//**************************************************************************
/** Returns the java.io.File representation of this object. */
private java.io.File getFile(){
if (file==null) file = new java.io.File(path + name);
return file;
}
//**************************************************************************
//** Get File Extension
//**************************************************************************
/** Returns the file's extension, excluding the last dot/period
* (e.g. "C:\image.jpg" will return "jpg"). Returns a zero-length string
* if there is no extension.
*/
public String getExtension(){
int idx = name.lastIndexOf(".");
if (idx > -1) return name.substring(idx+1);
else return "";
}
//**************************************************************************
//** getSize
//**************************************************************************
/** Returns the size of the file, in bytes. Returns 0L if the file is does
* not exist or if the object is a directory.
*/
public long getSize(){
if (file!=null) return getFileSize();
try{
FileAttributes attr = getFileAttributes();
if (attr!=null) return attr.getSize();
else{
getFile();
return getFileSize();
}
}
catch(java.io.FileNotFoundException e){
return 0L;
}
}
private long getFileSize(){
long size = file.length();
if (size>0L && file.isFile()) return size;
else return 0L;
}
//**************************************************************************
//** getDate
//**************************************************************************
/** Returns a timestamp of when the file was last modified. Returns null if
* the file does not exist or if the object is a directory.
*/
public java.util.Date getDate(){
if (file!=null) return getFileDate();
try{
FileAttributes attr = getFileAttributes();
if (attr!=null) return attr.getLastWriteTime();
else{
getFile();
return getFileDate();
}
}
catch(java.io.FileNotFoundException e){
return null;
}
}
private java.util.Date getFileDate(){
if (file.exists() && file.isFile()) return new java.util.Date(file.lastModified());
else return null;
}
//**************************************************************************
//** setDate
//**************************************************************************
/** Used to set/update the last modified date.
*/
public boolean setDate(java.util.Date lastModified){
if (lastModified!=null){
java.io.File file = getFile();
if (file.exists() && file.isFile()){
long t = lastModified.getTime();
if (getDate().getTime()!=t){
attr = null;
return getFile().setLastModified(t);
}
}
}
return false;
}
//**************************************************************************
//** Exists
//**************************************************************************
/** Used to determine whether a file exists. Returns false if the file
* system can't find the file or if the object is a directory.
*/
public boolean exists(){
if (file!=null){
return (file.isFile() && file.exists());
}
try{
FileAttributes attr = getFileAttributes();
if (attr!=null) return true;
else{
getFile();
return (file.isFile() && file.exists());
}
}
catch(java.io.FileNotFoundException e){
return false;
}
}
//**************************************************************************
//** isHidden
//**************************************************************************
/** Used to check whether the file is hidden. Returns true if the file
* exists and is hidden according to the conventions of the underlying
* file system.
*/
public boolean isHidden(){
if (file!=null){
return (file.isFile() && file.isHidden());
}
try{
FileAttributes attr = getFileAttributes();
if (attr!=null) return attr.isHidden();
else{
getFile();
return (file.isFile() && file.isHidden());
}
}
catch(java.io.FileNotFoundException e){
return false;
}
}
//**************************************************************************
//** isReadOnly
//**************************************************************************
/** Used to check whether the file has write permissions. Returns true if
* the file exists and the application is not allowed to write to the file.
*/
public boolean isReadOnly(){
if (file!=null){
return (file.isFile() && !file.canWrite());
}
try{
FileAttributes attr = getFileAttributes();
if (attr!=null) return attr.isReadOnly();
else{
getFile();
return (file.isFile() && !file.canWrite());
}
}
catch(java.io.FileNotFoundException e){
return false;
}
}
//**************************************************************************
//** isExecutable
//**************************************************************************
/** Used to check whether the file has execute permissions. Note that this
* method is not supported by JDK 1.5 or lower. Instead, the method will
* return false.
*/
public boolean isExecutable(){
java.io.File File = getFile();
if (File!=null){
//return File.canExecute(); //<--incompatable with JDK 1.5
int javaVersion = javaxt.utils.Java.getVersion();
if (javaVersion<6) return false;
else{
try{
return (Boolean) File.getClass().getMethod("canExecute").invoke(File, null);
}
catch(Exception e){
return false;
}
}
}
else return false;
}
//**************************************************************************
//** isLink
//**************************************************************************
/** Used to determine whether the file is actually a link to another file.
* Returns true for symbolic links, Windows junctions, and Windows
* shortcuts.
*/
public boolean isLink(){
return getLink()!=null;
}
//**************************************************************************
//** getLink
//**************************************************************************
/** Returns the target of a symbolic link, Windows junction, or Windows
* shortcut.
*/
public java.io.File getLink(){
try{
return getFileAttributes().getLink();
}
catch(Exception e){
return null;
}
}
//**************************************************************************
//** Delete File
//**************************************************************************
/** Used to delete the file. Warning: this operation is irrecoverable. */
public boolean delete(){
java.io.File file = getFile();
if (file!=null){
if (file.delete()){
attr=null;
return true;
}
}
return false;
}
//**************************************************************************
//** setBufferSize
//**************************************************************************
/** Used to set the size of the buffer used to read/write bytes. The default
* is 1MB (1,048,576 bytes)
*/
public void setBufferSize(int numBytes){
bufferSize = numBytes;
}
//**************************************************************************
//** Move File
//**************************************************************************
/** Used to move the file to a different directory. If the operation is
* successful, returns a handle to the new file. Otherwise, the original
* file is returned.
*/
public javaxt.io.File moveTo(Directory Destination){
return moveTo(new javaxt.io.File(Destination, getName()), true);
}
//**************************************************************************
//** Move File
//**************************************************************************
/** Used to move the file to a different location. If the operation is
* successful, returns a handle to the new file. Otherwise, the original
* file is returned.
*/
public javaxt.io.File moveTo(javaxt.io.File Destination, boolean Overwrite){
if (Destination.exists()){
if (Overwrite){
Destination.delete();
}
else{
return this;
}
}
java.io.File oldFile = getFile();
java.io.File newFile = Destination.toFile();
newFile.getParentFile().mkdirs();
if (oldFile.renameTo(newFile)){
attr = null;
file = newFile;
init(file.getAbsolutePath());
}
return this;
}
//**************************************************************************
//** Copy File
//**************************************************************************
/** Used to create a copy of this file. Preserves the last modified date
* associated with the source file. Returns true if the file was copied
* successfully.
*/
public boolean copyTo(Directory Destination, boolean Overwrite){
return copyTo(new File(Destination, getName()), Overwrite);
}
//**************************************************************************
//** Copy File
//**************************************************************************
/** Used to create a copy of this file. Preserves the last modified date
* associated with the source file. Returns true if the file was copied
* successfully.
*/
public boolean copyTo(javaxt.io.File Destination, boolean Overwrite){
//Validate Input/Output
java.io.File File = getFile();
if (File.exists()==false) return false;
if (Destination.exists() && Overwrite==false) return false;
if (File.equals(Destination.toFile())) return false;
//Create New Path
Destination.getParentDirectory().create();
//Copy File
ReadableByteChannel inputChannel = null;
WritableByteChannel outputChannel = null;
try{
FileInputStream input = new FileInputStream(File);
FileOutputStream output = new FileOutputStream(Destination.toFile());
inputChannel = Channels.newChannel(input);
outputChannel = Channels.newChannel(output);
final java.nio.ByteBuffer buffer = java.nio.ByteBuffer.allocateDirect(bufferSize);
while (inputChannel.read(buffer) != -1) {
buffer.flip();
outputChannel.write(buffer);
buffer.compact();
}
buffer.flip();
while (buffer.hasRemaining()) {
outputChannel.write(buffer);
}
inputChannel.close();
outputChannel.close();
Destination.toFile().setLastModified(File.lastModified());
return true;
}
catch(Exception e){
try{inputChannel.close();}catch(Exception ex){}
try{outputChannel.close();}catch(Exception ex){}
return false;
}
}
//**************************************************************************
//** Rename File
//**************************************************************************
/** Used to rename the file. The existing file name is replaced with a new
* name. Only the file name is affected. The file path remains unchanged.
* This method is therefore different from the java.io.File "renameTo"
* method. If the operation is successful, returns a handle to the new file.
* Otherwise, the original file is returned.
* @param FileName The new file name (including the file extension).
*/
public javaxt.io.File rename(String FileName){
if (FileName!=null){
FileName = FileName.trim();
if (FileName.length()>0){
java.io.File File = getFile();
if (File!=null) {
java.io.File newFile = new java.io.File(getPath() + FileName);
if (File.renameTo(newFile)){
attr = null;
file = newFile;
init(file.getAbsolutePath());
}
}
}
}
return this;
}
//**************************************************************************
//** getBufferedWriter
//**************************************************************************
/** Used to instantiate a BufferedWriter for this file.
*/
public BufferedWriter getBufferedWriter(String charsetName){
try{
java.io.File File = getFile();
attr = null;
File.getParentFile().mkdirs();
if (charsetName==null){
return new BufferedWriter( new FileWriter(File) );
}
else{
return new BufferedWriter(new OutputStreamWriter(new FileOutputStream(File), charsetName));
}
}
catch (Exception e){
return null;
}
}
//**************************************************************************
//** getBufferedReader
//**************************************************************************
/** Used to extract the contents of the file into a BufferedReader.
<pre>
BufferedReader br = file.getBufferedReader("UTF-8");
String strLine;
while ((strLine = br.readLine()) != null){
System.out.println(strLine);
}
</pre>
* @return BufferedReader or null
*/
public BufferedReader getBufferedReader(){
java.io.File File = getFile();
if (File.exists()){
try{
//NOTE: FileReader always assumes default encoding is OK!
return new BufferedReader( new FileReader(File) );
}
catch (Exception e){
}
}
return null;
}
//**************************************************************************
//** getBufferedReader
//**************************************************************************
/** Used to extract the contents of the file into a BufferedReader.
<pre>
BufferedReader br = file.getBufferedReader("UTF-8");
String strLine;
while ((strLine = br.readLine()) != null){
System.out.println (strLine);
}
</pre>
* WARNING: This method will never throw an error.
*
* @param charsetName Name of the character encoding used to read the file.
* Examples include UTF-8 and ISO-8859-1
*/
public BufferedReader getBufferedReader(String charsetName){
java.io.File File = getFile();
if (File.exists()){
try{
return new java.io.BufferedReader(new java.io.InputStreamReader(this.getInputStream(),charsetName));
}
catch (Exception e){
}
}
return null;
}
//**************************************************************************
//** getBufferedImage
//**************************************************************************
/** Returns the file contents as a BufferedImage. Returns a null if the file
* contents cannot be converted into a BufferedImage.
*/
public java.awt.image.BufferedImage getBufferedImage(){
Image img = getImage();
if (img!=null) return img.getBufferedImage();
return null;
}
//**************************************************************************
//** getImage
//**************************************************************************
/** Returns the file contents as an Image (javaxt.io.Image). Returns a null
* if the file contents cannot be converted into an Image.
*/
public Image getImage(){
java.io.File File = getFile();
if (File.exists()) return new Image(File);
else return null;
}
//**************************************************************************
//** getText
//**************************************************************************
/** Returns the file contents as a String. Returns an empty String if the
* file is empty or the contents cannot be converted to a String.
*/
public String getText(){
try{
return getText("UTF-8");
}
catch(Exception e){}
try{
return getBytes().toString();
}
catch(Exception e){}
return "";
}
//**************************************************************************
//** getText
//**************************************************************************
/** Returns the file contents as a String. Returns an empty String if the
* file is empty or the contents cannot be converted to a String.
* @param charsetName Name of the character encoding used to read the file.
* Examples include UTF-8 and ISO-8859-1
*/
public String getText(String charsetName){
try{
return getBytes().toString(charsetName);
}
catch(Exception e){}
return "";
}
//**************************************************************************
//** getXML
//**************************************************************************
/** Returns the file contents as a XML DOM Document(org.w3c.dom.Document).
* Returns a null if the file contents cannot be converted into a DOM
* Document.
*/
public org.w3c.dom.Document getXML(){
try (FileInputStream is = getInputStream()) {
return javaxt.xml.DOM.createDocument(is);
}
catch(Exception e){
return null;
}
}
//**************************************************************************
//** getJSONObject
//**************************************************************************
/** Returns the file contents as a JSON object (javaxt.json.JSONObject).
* Returns a null if the file contents cannot be converted into a JSON
* object.
*/
public javaxt.json.JSONObject getJSONObject(){
try {
return new javaxt.json.JSONObject(getText());
}
catch(Exception e){
return null;
}
}
//**************************************************************************
//** getJSONArray
//**************************************************************************
/** Returns the file contents as a JSON array (javaxt.json.JSONArray).
* Returns a null if the file contents cannot be converted into a JSON
* array.
*/
public javaxt.json.JSONArray getJSONArray(){
try {
return new javaxt.json.JSONArray(getText());
}
catch(Exception e){
return null;
}
}
//**************************************************************************
//** getBytes
//**************************************************************************
/** Returns the file contents as a ByteArrayOutputStream. Returns a null if
* the file contents cannot be converted to a ByteArrayOutputStream.
*/
public ByteArrayOutputStream getBytes(){
return getBytes(getFile(), bufferSize);
}
private static ByteArrayOutputStream getBytes(java.io.File File, int bufferSize){
if (File.exists()){
try (FileInputStream is = new FileInputStream(File)) {
ByteArrayOutputStream bas = new ByteArrayOutputStream();
byte[] b = new byte[bufferSize];
int x;
while((x=is.read(b,0,bufferSize))>-1) {
bas.write(b,0,x);
}
bas.close();
return bas;
}
catch(Exception e){
}
}
return null;
}
//**************************************************************************
//** checksum
//**************************************************************************
/** Returns a long value representing a cyclic redundancy check
* (CRC-32 checksum) of the file, or -1 if not known.
*/
public long checksum(){
if (!exists()) return -1;
try{
java.util.zip.CRC32 crc = new java.util.zip.CRC32();
crc.update(getBytes().toByteArray());
return crc.getValue();
}
catch(Exception e){
return -1;
}
}
//**************************************************************************
//** getSHA1
//**************************************************************************
/** Returns a string representing the SHA-1 hash for the file.
*/
public String getSHA1() {
return getHash("SHA-1");
}
//**************************************************************************
//** getMD5
//**************************************************************************
/** Returns a string representing the MD5 hash for the file.
*/
public String getMD5() {
return getHash("MD5");
}
//**************************************************************************
//** getHash
//**************************************************************************
private String getHash(String algorithm){
if (!exists()) return null;
try (InputStream input = getInputStream()) {
java.security.MessageDigest md = java.security.MessageDigest.getInstance(algorithm);
byte[] buf = new byte[bufferSize];
int i;
while((i=input.read(buf))!=-1) {
md.update(buf, 0, i);
}
//return new javax.xml.bind.annotation.adapters.HexBinaryAdapter().marshal(md.digest()).toLowerCase();
return printHexBinary(md.digest()).toLowerCase();
}
catch(Exception e){
return null;
}
}
private static final char[] hexCode = "0123456789ABCDEF".toCharArray();
private String printHexBinary(byte[] data) {
if (data==null) return null;
StringBuilder r = new StringBuilder(data.length * 2);
for (byte b : data) {
r.append(hexCode[(b >> 4) & 0xF]);
r.append(hexCode[(b & 0xF)]);
}
return r.toString();
}
//**************************************************************************
//** create
//**************************************************************************
/** Creates a new file if one does not exist.
*/
public void create(){
if (exists()) return;
try {
java.io.File file = getFile();
file.getParentFile().mkdirs();
file.createNewFile();
}
catch (Exception e){}
}
//**************************************************************************
//** write
//**************************************************************************
/** Creates a new file using the given ByteArrayOutputStream. Note that this
* method will convert the ByteArrayOutputStream to a byte array using the
* toByteArray() method which may result in memory issues.
*/
public void write(ByteArrayOutputStream bas){
write(bas.toByteArray());
}
//**************************************************************************
//** write
//**************************************************************************
/** Creates a new file using the given byte array.
*/
public void write(byte[] bytes){
java.io.File File = getFile();
attr = null;
if (File!=null){
FileOutputStream output = null;
try {
File.getParentFile().mkdirs();
output = new FileOutputStream(File);
output.write(bytes);
}
catch (Exception e){}
finally {
try { if (output != null) output.close(); }
catch (Exception e){}
}
}
}
//**************************************************************************
//** write
//**************************************************************************
/** Creates a new file using the given InputStream. Note that the caller is
* responsible for closing the input stream after the method is complete.
*/
public void write(InputStream input){
java.io.File File = getFile();
attr = null;
if (File!=null){
FileOutputStream output = null;
try {
File.getParentFile().mkdirs();
output = new FileOutputStream(File);
byte[] buf = new byte[bufferSize];
int i = 0;
while((i=input.read(buf))!=-1) {
output.write(buf, 0, i);
}
}
catch (Exception e){}
finally {
try { if (output != null) output.close(); }
catch (Exception e){}
}
}
}
//**************************************************************************
//** Write Text
//**************************************************************************
/** Used to write text to a file. Uses UTF-8 character encoding. Use the
* other write method to specify a different character encoding (e.g.
* ISO-8859-1).
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