net.openhft.compiler

Class MyJavaFileManager

java.lang.Object

net.openhft.compiler.MyJavaFileManager

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable, JavaFileManager, OptionChecker

public class MyJavaFileManager
extends Object
implements JavaFileManager

Custom JavaFileManager that stores compiled class files in memory and exposes them as byte arrays, while delegating unresolved operations to a wrapped StandardJavaFileManager.

Nested Class Summary

Nested classes/interfaces inherited from interface javax.tools.JavaFileManager

JavaFileManager.Location

Constructor Summary

Constructors

Constructor and Description
MyJavaFileManager(StandardJavaFileManager fileManager) Create a file manager that delegates to the provided instance while keeping compiled class bytes in memory.

Method Summary

Modifier and Type	Method and Description
void	clearBuffers() Remove all compiled class data from memory.
void	close()
void	flush()
@NotNull Map<String,byte[]>	getAllBuffers() Collect all compiled class buffers, blocking until previous compilation runs finish.
ClassLoader	getClassLoader(JavaFileManager.Location location)
FileObject	getFileForInput(JavaFileManager.Location location, String packageName, String relativeName)
FileObject	getFileForOutput(JavaFileManager.Location location, String packageName, String relativeName, FileObject sibling)
JavaFileObject	getJavaFileForInput(JavaFileManager.Location location, String className, JavaFileObject.Kind kind) Return a JavaFileObject backed by the in-memory buffer when the caller requests a class that has just been compiled to StandardLocation.CLASS_OUTPUT.
@NotNull JavaFileObject	getJavaFileForOutput(JavaFileManager.Location location, String className, JavaFileObject.Kind kind, FileObject sibling) Store compiled class bytes in the internal buffer and return a sink that writes into it.
boolean	handleOption(String current, Iterator<String> remaining)
boolean	hasLocation(JavaFileManager.Location location)
String	inferBinaryName(JavaFileManager.Location location, JavaFileObject file)
String	inferModuleName(JavaFileManager.Location location) Reflectively call inferModuleName if present on the delegate.
boolean	isSameFile(FileObject a, FileObject b)
int	isSupportedOption(String option)
Iterable<JavaFileObject>	list(JavaFileManager.Location location, String packageName, Set<JavaFileObject.Kind> kinds, boolean recurse)
Iterable<Set<JavaFileManager.Location>>	listLocationsForModules(JavaFileManager.Location location) Invoke listLocationsForModules reflectively if available.

Methods inherited from class java.lang.Object

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

Constructor Detail

MyJavaFileManager

public MyJavaFileManager(StandardJavaFileManager fileManager)

Create a file manager that delegates to the provided instance while keeping compiled class bytes in memory.

Parameters:

fileManager - the underlying file manager to delegate to

Method Detail

listLocationsForModules

public Iterable<Set<JavaFileManager.Location>> listLocationsForModules(JavaFileManager.Location location)

Invoke listLocationsForModules reflectively if available. This method synchronises on the current instance as some JDK implementations are not thread-safe.

Parameters:

location - the location whose modules are requested

Returns:

the module locations or an empty iterable

inferModuleName

public String inferModuleName(JavaFileManager.Location location)

Reflectively call inferModuleName if present on the delegate. As above, the call is synchronised for safety on older JDKs.

Parameters:

location - the location to inspect

Returns:

the inferred module name or null

getClassLoader

public ClassLoader getClassLoader(JavaFileManager.Location location)

Specified by:

getClassLoader in interface JavaFileManager

list

public Iterable<JavaFileObject> list(JavaFileManager.Location location,
                                     String packageName,
                                     Set<JavaFileObject.Kind> kinds,
                                     boolean recurse)
                              throws IOException

Specified by:

list in interface JavaFileManager

Throws:

IOException

inferBinaryName

public String inferBinaryName(JavaFileManager.Location location,
                              JavaFileObject file)

Specified by:

inferBinaryName in interface JavaFileManager

isSameFile

public boolean isSameFile(FileObject a,
                          FileObject b)

Specified by:

isSameFile in interface JavaFileManager

handleOption

public boolean handleOption(String current,
                            Iterator<String> remaining)

Specified by:

handleOption in interface JavaFileManager

hasLocation

public boolean hasLocation(JavaFileManager.Location location)

Specified by:

hasLocation in interface JavaFileManager

getJavaFileForInput

public JavaFileObject getJavaFileForInput(JavaFileManager.Location location,
                                          String className,
                                          JavaFileObject.Kind kind)
                                   throws IOException

Return a JavaFileObject backed by the in-memory buffer when the caller requests a class that has just been compiled to StandardLocation.CLASS_OUTPUT.

Specified by:

getJavaFileForInput in interface JavaFileManager

Throws:

IOException

getJavaFileForOutput

@NotNull
public @NotNull JavaFileObject getJavaFileForOutput(JavaFileManager.Location location,
                                                             String className,
                                                             JavaFileObject.Kind kind,
                                                             FileObject sibling)

Store compiled class bytes in the internal buffer and return a sink that writes into it.

Specified by:

getJavaFileForOutput in interface JavaFileManager

getFileForInput

public FileObject getFileForInput(JavaFileManager.Location location,
                                  String packageName,
                                  String relativeName)
                           throws IOException

Specified by:

getFileForInput in interface JavaFileManager

Throws:

IOException

getFileForOutput

public FileObject getFileForOutput(JavaFileManager.Location location,
                                   String packageName,
                                   String relativeName,
                                   FileObject sibling)
                            throws IOException

Specified by:

getFileForOutput in interface JavaFileManager

Throws:

IOException

flush

public void flush()

Specified by:

flush in interface Flushable

Specified by:

flush in interface JavaFileManager

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in interface JavaFileManager

Throws:

IOException

isSupportedOption

public int isSupportedOption(String option)

Specified by:

isSupportedOption in interface OptionChecker

clearBuffers

public void clearBuffers()

Remove all compiled class data from memory.

getAllBuffers

@NotNull
public @NotNull Map<String,byte[]> getAllBuffers()

Collect all compiled class buffers, blocking until previous compilation runs finish.

Returns:

a map of class name to bytecode