// Create from a given File
private void initRead(File f) {
try {
initRead(f.getCanonicalPath());
} catch (Exception e) {
throw new ResourceException("FileResource: cannot access " + f);
}
}
/**
* Create a <code>FileResource</code> object that opens a file whose name is passed as a
* parameter, possibly to write to it.
*
* <p>If the user wants to change the contents of the open file by using the method <code>write
* </code> to add new strings to it, pass <code>true</code> as the second parameter. Otherwise it
* is assumed the user will only iterate over the existing contents of the file.
*
* <p>The named file should be on the current class path to be found.
*
* @param filename the name of the file to be opened
* @param writable allow changes to this file only if true
* @throws exception if the filename cannot be accessed
*/
public FileResource(String filename, boolean writable) {
if (writable) {
initWrite(filename);
} else {
initRead(filename);
}
}
/**
* Create a <code>FileResource</code> object that opens a file represented by the File object
* passed as a parameter, possibly to write to it.
*
* <p>If the user wants to change the contents of the open file by using the method <code>write
* </code> to add new strings to it, pass <code>true</code> as the second parameter. Otherwise it
* is assumed the user will only iterate over the existing contents of the file.
*
* <p>Useful, for example, when used in conjunction with the <code>DirectoryResource</code> class.
*
* @param file the file to be represented by this resource
* @param writable allow changes to this file only if true
* @throws exception if the file cannot be accessed
*/
public FileResource(File file, boolean writable) {
if (writable) {
initWrite(file);
} else {
initRead(file);
}
}
/**
* Create a <code>FileResource</code> object that opens the file chosen by the user using a file
* selection dialog box, possibly to write to it.
*
* <p>If the user wants to change the contents of the open file by using the method <code>write
* </code> to add new strings to it, pass <code>true</code> as the second parameter. Otherwise it
* is assumed the user will only iterate over the existing contents of the file.
*
* @param writable allow changes to this file only if true
* @throws exception if no file is selected by the user
*/
public FileResource(boolean writable) {
if (writable) {
initWrite();
} else {
initRead();
}
}
// Prompt user for file to open
private void initRead() {
File f = FileSelector.selectFile();
if (f == null) {
throw new ResourceException("FileResource: no file choosen for reading");
} else {
initRead(f);
}
}
// create file for writing
private void initWrite(File f) {
try {
mySaveFile = f;
if (f.exists() && f.canWrite()) {
initRead(f);
} else {
mySource = "";
myPath = f.getCanonicalPath();
}
} catch (Exception e) {
throw new ResourceException("FileResource: cannot access " + f, e);
}
}
/**
* Create a <code>FileResource</code> object that opens a file whose name is passed as a
* parameter.
*
* <p>The named file should be on the current class path to be found.
*
* @param filename the name of the file to be opened
* @throws exception if the filename cannot be accessed
*/
public FileResource(String filename) {
initRead(filename);
}
/**
* Create a <code>FileResource</code> object that opens a file represented by the File object
* passed as a parameter.
*
* <p>Useful, for example, when used in conjunction with the <code>DirectoryResource</code> class.
*
* @param file the file to be represented by this resource
* @throws exception if the file cannot be accessed
*/
public FileResource(File file) {
initRead(file);
}
/**
* Create a <code>FileResource</code> object that opens the file chosen by the user using a file
* selection dialog box.
*
* @throws exception if no file is selected by the user
*/
public FileResource() {
initRead();
}
