org.glassfish.pfl.basic.reflection

Class BridgeBase

java.lang.Object

org.glassfish.pfl.basic.reflection.BridgeBase

Direct Known Subclasses:

Bridge

public abstract class BridgeBase
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static long	INVALID_FIELD_OFFSET This constant differs from all results that will ever be returned from objectFieldOffset(java.lang.reflect.Field).

Constructor Summary

Constructors

Constructor and Description
BridgeBase()

Method Summary

Modifier and Type	Method and Description
Class<?>	defineClass(Class<?> anchorClass, String className, byte[] classBytes) Defines a new class from bytecode.
Class<?>	defineClass(String className, byte[] classBytes, ClassLoader classLoader, ProtectionDomain protectionDomain) Deprecated. will not work in Java 11 or later. Use defineClass(Class, String, byte[]) instead
void	ensureClassInitialized(Class<?> cl) Ensure that the class has been initialized.
boolean	getBoolean(Object o, long offset)
byte	getByte(Object o, long offset)
char	getChar(Object o, long offset)
double	getDouble(Object o, long offset)
float	getFloat(Object o, long offset)
int	getInt(Object o, long offset) Fetches a field element within the given object o at the given offset.
abstract ClassLoader	getLatestUserDefinedLoader() Obtain the latest user defined ClassLoader from the call stack.
long	getLong(Object o, long offset)
<T> T	getObject(Object o, long offset)
short	getShort(Object o, long offset)
abstract boolean	hasStaticInitializerForSerialization(Class<?> cl) Returns true if the given class defines a static initializer method, false otherwise.
abstract <T> Constructor<?>	newConstructorForExternalization(Class<T> cl) Return a constructor that can be used to create an instance of the class for externalization.
abstract <T> Constructor<T>	newConstructorForSerialization(Class<T> aClass) Return a no-arg constructor for the specified class, based on the default constructor for its nearest non-serializable base class.
abstract <T> Constructor<T>	newConstructorForSerialization(Class<T> aClass, Constructor<?> cons) Return a no-arg constructor for the specified class which invokes the specified constructor.
abstract OptionalDataException	newOptionalDataExceptionForSerialization(boolean bool) Return a new OptionalDataException instance.
long	objectFieldOffset(Field f) Returns the offset of a non-static field, which can be passed into the set...
void	putBoolean(Object o, long offset, boolean x)
void	putByte(Object o, long offset, byte x)
void	putChar(Object o, long offset, char x)
void	putDouble(Object o, long offset, double x)
void	putFloat(Object o, long offset, float x)
void	putInt(Object o, long offset, int x) Stores a value into a given Java field.
void	putLong(Object o, long offset, long x)
void	putObject(Object o, long offset, Object x)
void	putShort(Object o, long offset, short x)
abstract MethodHandle	readObjectForSerialization(Class<?> cl) Returns a method handle to allow invocation of the specified class's readObject method.
abstract MethodHandle	readResolveForSerialization(Class<?> cl) Returns a method handle to allow invocation of the specified class's readResolve method.
long	staticFieldOffset(Field f)
void	throwException(Throwable ee) Throw the exception.
Field	toAccessibleField(Field field, Class callingClass) Returns the specified field after calling setAccessible, if it is accessible from the specified class.
Method	toAccessibleMethod(Method method, Class callingClass) Returns the specified method after calling setAccessible, if it is accessible from the specified class.
abstract MethodHandle	writeObjectForSerialization(Class<?> cl) Returns a method handle to allow invocation of the specified class's writeObject method.
abstract MethodHandle	writeReplaceForSerialization(Class<?> cl) Returns a method handle to allow invocation of the specified class's writeReplace method.

Methods inherited from class java.lang.Object

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

Field Detail

INVALID_FIELD_OFFSET

public static final long INVALID_FIELD_OFFSET

This constant differs from all results that will ever be returned from objectFieldOffset(java.lang.reflect.Field).

See Also:

Constant Field Values

Constructor Detail

BridgeBase

public BridgeBase()

Method Detail

getInt

public final int getInt(Object o,
                        long offset)

Fetches a field element within the given object o at the given offset. The result is undefined unless the offset was obtained from objectFieldOffset(java.lang.reflect.Field) on the Field of some Java field and the object referred to by o is of a class compatible with that field's class.

Parameters:

o - Java heap object in which the field from which the offset was obtained resides

offset - indication of where the field resides in a Java heap object

Returns:

the value fetched from the indicated Java field

Throws:

RuntimeException - No defined exceptions are thrown, not even NullPointerException

putInt

public final void putInt(Object o,
                         long offset,
                         int x)

Stores a value into a given Java field.

The first two parameters are interpreted exactly as with getInt(Object, long) to refer to a specific Java field. The given value is stored into that field.

The field must be of the same type as the method parameter x.

Parameters:

o - Java heap object in which the field resides, if any, else null

offset - indication of where the field resides in a Java heap object.

x - the value to store into the indicated Java field

Throws:

RuntimeException - No defined exceptions are thrown, not even NullPointerException

getObject

public final <T> T getObject(Object o,
                             long offset)

See Also:

getInt(Object, long)

putObject

public final void putObject(Object o,
                            long offset,
                            Object x)

See Also:

putInt(Object, long, int)

getBoolean

public final boolean getBoolean(Object o,
                                long offset)

See Also:

getInt(Object, long)

putBoolean

public final void putBoolean(Object o,
                             long offset,
                             boolean x)

See Also:

putInt(Object, long, int)

getByte

public final byte getByte(Object o,
                          long offset)

See Also:

getInt(Object, long)

putByte

public final void putByte(Object o,
                          long offset,
                          byte x)

See Also:

putInt(Object, long, int)

getShort

public final short getShort(Object o,
                            long offset)

See Also:

getInt(Object, long)

putShort

public final void putShort(Object o,
                           long offset,
                           short x)

See Also:

putInt(Object, long, int)

getChar

public final char getChar(Object o,
                          long offset)

See Also:

getInt(Object, long)

putChar

public final void putChar(Object o,
                          long offset,
                          char x)

See Also:

putInt(Object, long, int)

getLong

public final long getLong(Object o,
                          long offset)

See Also:

getInt(Object, long)

putLong

public final void putLong(Object o,
                          long offset,
                          long x)

See Also:

putInt(Object, long, int)

getFloat

public final float getFloat(Object o,
                            long offset)

See Also:

getInt(Object, long)

putFloat

public final void putFloat(Object o,
                           long offset,
                           float x)

See Also:

putInt(Object, long, int)

getDouble

public final double getDouble(Object o,
                              long offset)

See Also:

getInt(Object, long)

putDouble

public final void putDouble(Object o,
                            long offset,
                            double x)

See Also:

putInt(Object, long, int)

objectFieldOffset

public final long objectFieldOffset(Field f)

Returns the offset of a non-static field, which can be passed into the set... or get... methods.

See Also:

getInt(Object, long)

staticFieldOffset

public final long staticFieldOffset(Field f)

throwException

public final void throwException(Throwable ee)

Throw the exception. The exception may be an undeclared checked exception.

defineClass

@Deprecated
public Class<?> defineClass(String className,
                                        byte[] classBytes,
                                        ClassLoader classLoader,
                                        ProtectionDomain protectionDomain)

Deprecated. will not work in Java 11 or later. Use defineClass(Class, String, byte[]) instead

Defines a class is a specified classloader.

Parameters:

className - the name of the class

classBytes - the byte code for the class

classLoader - the classloader in which it is to be defined

protectionDomain - the domain in which the class should be defined

defineClass

public Class<?> defineClass(Class<?> anchorClass,
                            String className,
                            byte[] classBytes)

Defines a new class from bytecode. The class will be defined in the classloader and package associated with a specified 'anchor class'.

Parameters:

anchorClass - the class from which the package and classloader of the new class are to be taken.

className - the name of the class to define

classBytes - the bytes used to define the class

Returns:

a new instantiable class, in the package and classloader of the anchor class.

ensureClassInitialized

public final void ensureClassInitialized(Class<?> cl)

Ensure that the class has been initialized.

Parameters:

cl - the class to ensure is initialized

getLatestUserDefinedLoader

public abstract ClassLoader getLatestUserDefinedLoader()

Obtain the latest user defined ClassLoader from the call stack. This is required by the RMI-IIOP specification.

newConstructorForExternalization

public abstract <T> Constructor<?> newConstructorForExternalization(Class<T> cl)

Return a constructor that can be used to create an instance of the class for externalization.

Parameters:

cl - the class

newConstructorForSerialization

public abstract <T> Constructor<T> newConstructorForSerialization(Class<T> aClass,
                                                                  Constructor<?> cons)

Return a no-arg constructor for the specified class which invokes the specified constructor.

Parameters:

aClass - the class for which a constructor should be returned.

cons - the default constructor on which to model the new constructor.

newConstructorForSerialization

public abstract <T> Constructor<T> newConstructorForSerialization(Class<T> aClass)

Return a no-arg constructor for the specified class, based on the default constructor for its nearest non-serializable base class.

Parameters:

aClass - the class for which a constructor should be returned.

hasStaticInitializerForSerialization

public abstract boolean hasStaticInitializerForSerialization(Class<?> cl)

Returns true if the given class defines a static initializer method, false otherwise.

writeObjectForSerialization

public abstract MethodHandle writeObjectForSerialization(Class<?> cl)
                                                  throws NoSuchMethodException,
                                                         IllegalAccessException

Returns a method handle to allow invocation of the specified class's writeObject method.

Parameters:

cl - the class containing the method

Throws:

NoSuchMethodException

IllegalAccessException

readObjectForSerialization

public abstract MethodHandle readObjectForSerialization(Class<?> cl)
                                                 throws NoSuchMethodException,
                                                        IllegalAccessException

Returns a method handle to allow invocation of the specified class's readObject method.

Parameters:

cl - the class containing the method

Throws:

NoSuchMethodException

IllegalAccessException

readResolveForSerialization

public abstract MethodHandle readResolveForSerialization(Class<?> cl)

Returns a method handle to allow invocation of the specified class's readResolve method.

Parameters:

cl - the class containing the method

writeReplaceForSerialization

public abstract MethodHandle writeReplaceForSerialization(Class<?> cl)

Returns a method handle to allow invocation of the specified class's writeReplace method.

Parameters:

cl - the class containing the method

newOptionalDataExceptionForSerialization

public abstract OptionalDataException newOptionalDataExceptionForSerialization(boolean bool)

Return a new OptionalDataException instance.

Returns:

a new OptionalDataException instance

toAccessibleField

public Field toAccessibleField(Field field,
                               Class callingClass)

Returns the specified field after calling setAccessible, if it is accessible from the specified class.

Parameters:

field - the field to make accessible

callingClass - the class which wants to access it.

Returns:

the original field, rendered accessible, or null.

toAccessibleMethod

public Method toAccessibleMethod(Method method,
                                 Class callingClass)

Returns the specified method after calling setAccessible, if it is accessible from the specified class.

Parameters:

method - the method to make accessible

callingClass - the class which wants to access it.

Returns:

the original method, rendered accessible, or null.