javax.tools.FileObject Maven / Gradle / Ivy
Show all versions of jx Show documentation
/*
* Copyright (C) 2021 ZeoFlow SRL
*
* 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 javax.tools;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;
import java.net.URI;
/**
* File abstraction for tools. In this context, file means
* an abstraction of regular files and other sources of data. For
* example, a file object can be used to represent regular files,
* memory cache, or data in databases.
*
* All methods in this interface might throw a SecurityException if
* a security exception occurs.
*
*
Unless explicitly allowed, all methods in this interface might
* throw a NullPointerException if given a {@code null} argument.
*
* @author Peter von der Ahé
* @author Jonathan Gibbons
* @since 1.6
*/
public interface FileObject
{
/**
* Returns a URI identifying this file object.
*
* @return a URI
*/
URI toUri();
/**
* Gets a user-friendly name for this file object. The exact
* value returned is not specified but implementations should take
* care to preserve names as given by the user. For example, if
* the user writes the filename {@code "BobsApp\Test.java"} on
* the command line, this method should return {@code
* "BobsApp\Test.java"} whereas the {@linkplain #toUri toUri}
* method might return {@code
* file:///C:/Documents%20and%20Settings/UncleBob/BobsApp/Test.java}.
*
* @return a user-friendly name
*/
String getName();
/**
* Gets an InputStream for this file object.
*
* @return an InputStream
*
* @throws IllegalStateException if this file object was
* opened for writing and does not support reading
* @throws UnsupportedOperationException if this kind of file
* object does not support byte access
* @throws IOException if an I/O error occurred
*/
InputStream openInputStream() throws IOException;
/**
* Gets an OutputStream for this file object.
*
* @return an OutputStream
*
* @throws IllegalStateException if this file object was
* opened for reading and does not support writing
* @throws UnsupportedOperationException if this kind of
* file object does not support byte access
* @throws IOException if an I/O error occurred
*/
OutputStream openOutputStream() throws IOException;
/**
* Gets a reader for this object. The returned reader will
* replace bytes that cannot be decoded with the default
* translation character. In addition, the reader may report a
* diagnostic unless {@code ignoreEncodingErrors} is true.
*
* @param ignoreEncodingErrors ignore encoding errors if true
*
* @return a Reader
*
* @throws IllegalStateException if this file object was
* opened for writing and does not support reading
* @throws UnsupportedOperationException if this kind of
* file object does not support character access
* @throws IOException if an I/O error occurred
*/
Reader openReader(boolean ignoreEncodingErrors) throws IOException;
/**
* Gets the character content of this file object, if available.
* Any byte that cannot be decoded will be replaced by the default
* translation character. In addition, a diagnostic may be
* reported unless {@code ignoreEncodingErrors} is true.
*
* @param ignoreEncodingErrors ignore encoding errors if true
*
* @return a CharSequence if available; {@code null} otherwise
*
* @throws IllegalStateException if this file object was
* opened for writing and does not support reading
* @throws UnsupportedOperationException if this kind of
* file object does not support character access
* @throws IOException if an I/O error occurred
*/
CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException;
/**
* Gets a Writer for this file object.
*
* @return a Writer
*
* @throws IllegalStateException if this file object was
* opened for reading and does not support writing
* @throws UnsupportedOperationException if this kind of
* file object does not support character access
* @throws IOException if an I/O error occurred
*/
Writer openWriter() throws IOException;
/**
* Gets the time this file object was last modified. The time is
* measured in milliseconds since the epoch (00:00:00 GMT, January
* 1, 1970).
*
* @return the time this file object was last modified; or 0 if
* the file object does not exist, if an I/O error occurred, or if
* the operation is not supported
*/
long getLastModified();
/**
* Deletes this file object. In case of errors, returns false.
*
* @return true if and only if this file object is successfully
* deleted; false otherwise
*/
boolean delete();
}