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/OpenJDK 21

Class SimpleJavaFileObject

java.lang.Object
javax.tools.SimpleJavaFileObject
All Implemented Interfaces:
FileObject, JavaFileObject 
public class SimpleJavaFileObject extends Object implements JavaFileObject
Provides simple implementations for most methods in JavaFileObject. This class is designed to be subclassed and used as a basis for JavaFileObject implementations. Subclasses can override the implementation and specification of any method of this class as long as the general contract of JavaFileObject is obeyed.
Since:
1.6

Nested Class Summary

Nested classes/interfaces declared in interface javax.tools.JavaFileObject

JavaFileObject.Kind

Field Summary

Modifier and Type Field Description
protected final JavaFileObject.Kind kind
The kind of this file object.
protected final URI uri
A URI for this file object.

Constructor Summary

SimpleJavaFileObject(URI uri, JavaFileObject.Kind kind)
Modifier Constructor Description
protected
Construct a SimpleJavaFileObject of the given kind and with the given URI.

Method Summary

Modifier and Type Method Description
boolean delete()
This implementation does nothing.
Modifier getAccessLevel()
This implementation returns null.
CharSequence getCharContent(boolean ignoreEncodingErrors)
This implementation always throws UnsupportedOperationException.
JavaFileObject.Kind getKind()
Returns the kind of this file object.
long getLastModified()
This implementation returns 0L.
String getName()
Returns a user-friendly name for this file object.
NestingKind getNestingKind()
This implementation returns null.
boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind)
This implementation compares the path of its URI to the given simple name.
InputStream openInputStream()
This implementation always throws UnsupportedOperationException.
OutputStream openOutputStream()
This implementation always throws UnsupportedOperationException.
Reader openReader(boolean ignoreEncodingErrors)
Wraps the result of getCharContent(boolean) in a Reader.
Writer openWriter()
Wraps the result of openOutputStream in a Writer.
URI toUri()
Returns a URI identifying this file object.

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

uri

protected final URI uri
A URI for this file object.

kind

protected final JavaFileObject.Kind kind
The kind of this file object.

Constructor Details

SimpleJavaFileObject

protected SimpleJavaFileObject(URI uri, JavaFileObject.Kind kind)
Construct a SimpleJavaFileObject of the given kind and with the given URI.
Parameters:
uri - the URI for this file object
kind - the kind of this file object

Method Details

toUri

public URI toUri()
Description copied from interface: FileObject
Returns a URI identifying this file object.
Specified by:
toUri in interface FileObject
Returns:
a URI

getName

public String getName()
Description copied from interface: FileObject
Returns 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 "BobsApp\Test.java" on the command line, this method should return "BobsApp\Test.java" whereas the toUri method might return file:///C:/Documents%20and%20Settings/UncleBob/BobsApp/Test.java.
Specified by:
getName in interface FileObject
Returns:
a user-friendly name

openInputStream

public InputStream openInputStream() throws IOException
This implementation always throws UnsupportedOperationException. Subclasses can change this behavior as long as the contract of FileObject is obeyed.
Specified by:
openInputStream in interface FileObject
Returns:
an InputStream
Throws:
IOException - if an I/O error occurred

openOutputStream

public OutputStream openOutputStream() throws IOException
This implementation always throws UnsupportedOperationException. Subclasses can change this behavior as long as the contract of FileObject is obeyed.
Specified by:
openOutputStream in interface FileObject
Returns:
an OutputStream
Throws:
IOException - if an I/O error occurred

openReader

public Reader openReader(boolean ignoreEncodingErrors) throws IOException
Wraps the result of getCharContent(boolean) in a Reader. Subclasses can change this behavior as long as the contract of FileObject is obeyed.
Specified by:
openReader in interface FileObject
Parameters:
ignoreEncodingErrors - ignore encoding errors if true
Returns:
a Reader wrapping the result of getCharContent
Throws:
IllegalStateException - if this file object was opened for writing and does not support reading
UnsupportedOperationException - if this kind of file object does not support character access
IOException - if an I/O error occurred

getCharContent

public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException
This implementation always throws UnsupportedOperationException. Subclasses can change this behavior as long as the contract of FileObject is obeyed.
Specified by:
getCharContent in interface FileObject
Parameters:
ignoreEncodingErrors - ignore encoding errors if true
Returns:
a CharSequence if available; null otherwise
Throws:
IOException - if an I/O error occurred

openWriter

public Writer openWriter() throws IOException
Wraps the result of openOutputStream in a Writer. Subclasses can change this behavior as long as the contract of FileObject is obeyed.
Specified by:
openWriter in interface FileObject
Returns:
a Writer wrapping the result of openOutputStream
Throws:
IllegalStateException - if this file object was opened for reading and does not support writing
UnsupportedOperationException - if this kind of file object does not support character access
IOException - if an I/O error occurred

getLastModified

public long getLastModified()
This implementation returns 0L. Subclasses can change this behavior as long as the contract of FileObject is obeyed.
Specified by:
getLastModified in interface FileObject
Returns:
0L

delete

public boolean delete()
This implementation does nothing. Subclasses can change this behavior as long as the contract of FileObject is obeyed.
Specified by:
delete in interface FileObject
Returns:
false

getKind

public JavaFileObject.Kind getKind()
Description copied from interface: JavaFileObject
Returns the kind of this file object.
Specified by:
getKind in interface JavaFileObject
Returns:
this.kind

isNameCompatible

public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind)
This implementation compares the path of its URI to the given simple name. This method returns true if the given kind is equal to the kind of this object, and if the path is equal to simpleName + kind.extension or if it ends with "/" + simpleName + kind.extension.

This method calls getKind() and toUri() and does not access the fields uri and kind directly.

Subclasses can change this behavior as long as the contract of JavaFileObject is obeyed.

Specified by:
isNameCompatible in interface JavaFileObject
Parameters:
simpleName - a simple name of a class
kind - a kind
Returns:
true if this file object is compatible; false otherwise

getNestingKind

public NestingKind getNestingKind()
This implementation returns null. Subclasses can change this behavior as long as the contract of JavaFileObject is obeyed.
Specified by:
getNestingKind in interface JavaFileObject
Returns:
the nesting kind, or null if the nesting kind is not known

getAccessLevel

public Modifier getAccessLevel()
This implementation returns null. Subclasses can change this behavior as long as the contract of JavaFileObject is obeyed.
Specified by:
getAccessLevel in interface JavaFileObject
Returns:
the access level

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
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https://docs.oracle.com/en/java/javase/21/docs/api/java.compiler/javax/tools/SimpleJavaFileObject.html