Modifier and Type	Class and Description
private static class	DefaultObjectReferenceManager.ObjectReference

Modifier and Type	Field and Description
private final ConcurrentMap<Long, DefaultObjectReferenceManager.ObjectReference>	references
private final Runtime	runtime

Access	Constructor and Description
public	DefaultObjectReferenceManager(Runtime runtime)

Modifier and Type	Method and Description
public Pointer	add(Object The java object to generate a reference for obj) Implements abstract jnr.ffi.ObjectReferenceManager.add. Adds a mapping from a java object to a unique native address.
public Object	get(Pointer a native memory pointer. reference) Implements abstract jnr.ffi.ObjectReferenceManager.get. Gets the java object that is mapped to the native memory address referred to by `reference`.
private long	id(Object obj)
public boolean	remove(Pointer a native memory pointer. reference) Implements abstract jnr.ffi.ObjectReferenceManager.remove. Removes a mapping from java object to native pointer.

references	back to summary
private final ConcurrentMap<Long, DefaultObjectReferenceManager.ObjectReference> references

runtime	back to summary
private final Runtime runtime

DefaultObjectReferenceManager	back to summary
public DefaultObjectReferenceManager(Runtime runtime)

Method Detail

add back to summary

add	back to summary
public Pointer add(Object obj) Implements abstract jnr.ffi.ObjectReferenceManager.add. Doc from jnr.ffi.ObjectReferenceManager.add. Adds a mapping from a java object to a unique native address. Each call to this method is guaranteed to produce a memory address unique within the ObjectReferenceManager instance, even for the same object. A strong reference to `object` is maintained internally, until `remove(Pointer)` is called. Parameters obj:Object The java object to generate a reference for Returns:Pointer A pointer representing the unique id.

public Pointer add(Object obj)

Implements abstract jnr.ffi.ObjectReferenceManager.add.

Doc from jnr.ffi.ObjectReferenceManager.add.

Adds a mapping from a java object to a unique native address. Each call to this method is guaranteed to produce a memory address unique within the ObjectReferenceManager instance, even for the same object.

A strong reference to object is maintained internally, until remove(Pointer) is called.

Parameters

obj:Object: The java object to generate a reference for

Returns:Pointer

A pointer representing the unique id.

get back to summary

get	back to summary
public Object get(Pointer reference) Implements abstract jnr.ffi.ObjectReferenceManager.get. Doc from jnr.ffi.ObjectReferenceManager.get. Gets the java object that is mapped to the native memory address referred to by `reference`. Parameters reference:Pointer a native memory pointer. Returns:Object The java object corresponding to `pointer`.

public Object get(Pointer reference)

Implements abstract jnr.ffi.ObjectReferenceManager.get.

Doc from jnr.ffi.ObjectReferenceManager.get.

Gets the java object that is mapped to the native memory address referred to by reference.

Parameters

reference:Pointer: a native memory pointer.

Returns:Object

The java object corresponding to pointer.

id	back to summary
private long id(Object obj)

remove	back to summary
public boolean remove(Pointer reference) Implements abstract jnr.ffi.ObjectReferenceManager.remove. Doc from jnr.ffi.ObjectReferenceManager.remove. Removes a mapping from java object to native pointer. Parameters reference:Pointer a native memory pointer. Returns:boolean true if the mapping was removed.

remove

back to summary

public boolean remove(Pointer reference)

Implements abstract jnr.ffi.ObjectReferenceManager.remove.

Doc from jnr.ffi.ObjectReferenceManager.remove.

Removes a mapping from java object to native pointer.

Parameters

reference:Pointer: a native memory pointer.

Returns:boolean

true if the mapping was removed.

jnr.ffi.provider back to summary

private final Class DefaultObjectReferenceManager.ObjectReference

Class Inheritance

extends InAccessibleMemoryIO

java.lang.Object
jnr.ffi.Pointer
jnr.ffi.provider.AbstractMemoryIO
jnr.ffi.provider.InAccessibleMemoryIO
jnr.ffi.provider.DefaultObjectReferenceManager.ObjectReference

Field Summary

Modifier and Type	Field and Description
private final Object	referent

Constructor Summary

Access	Constructor and Description
public	ObjectReference(Runtime runtime, long address, Object referent)

Method Summary

Modifier and Type	Method and Description
public boolean	equals(Object the reference object with which to compare. obj) Overrides java.lang.Object.equals. Indicates whether some other object is "equal to" this one.
public int	hashCode() Overrides java.lang.Object.hashCode. Returns a hash code value for the object.
public long	size() Implements abstract jnr.ffi.Pointer.size. Gets the size of this memory object in bytes (optional operation).

Field Detail

referent	back to summary
private final Object referent

Constructor Detail

ObjectReference	back to summary
public ObjectReference(Runtime runtime, long address, Object referent)

Method Detail

equals back to summary

equals	back to summary
public boolean equals(Object obj) Overrides java.lang.Object.equals. Doc from java.lang.Object.equals. Indicates whether some other object is "equal to" this one. The `equals` method implements an equivalence relation on non-null object references: It is reflexive: for any non-null reference value `x`, `x.equals(x)` should return `true`. It is symmetric: for any non-null reference values `x` and `y`, `x.equals(y)` should return `true` if and only if `y.equals(x)` returns `true`. It is transitive: for any non-null reference values `x`, `y`, and `z`, if `x.equals(y)` returns `true` and `y.equals(z)` returns `true`, then `x.equals(z)` should return `true`. It is consistent: for any non-null reference values `x` and `y`, multiple invocations of `x.equals(y)` consistently return `true` or consistently return `false`, provided no information used in `equals` comparisons on the objects is modified. For any non-null reference value `x`, `x.equals(null)` should return `false`. An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes. Parameters obj:Object the reference object with which to compare. Returns:boolean `true` if this object is the same as the obj argument; `false` otherwise. Annotations @Override

public boolean equals(Object obj)

Overrides java.lang.Object.equals.

Doc from java.lang.Object.equals.

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

It is reflexive: for any non-null reference value x, x.equals(x) should return true.
It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
For any non-null reference value x, x.equals(null) should return false.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

Parameters

obj:Object: the reference object with which to compare.

Returns:boolean

true if this object is the same as the obj argument; false otherwise.

Annotations

@Override

hashCode back to summary

hashCode	back to summary
public int hashCode() Overrides java.lang.Object.hashCode. Doc from java.lang.Object.hashCode. Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by `java.util.HashMap`. The general contract of `hashCode` is: Whenever it is invoked on the same object more than once during an execution of a Java application, the `hashCode` method must consistently return the same integer, provided no information used in `equals` comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application. If two objects are equal according to the `equals` method, then calling the `hashCode` method on each of the two objects must produce the same integer result. It is not required that if two objects are unequal according to the `equals` method, then calling the `hashCode` method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables. Returns:int a hash code value for this object. Annotations @Override

public int hashCode()

Overrides java.lang.Object.hashCode.

Doc from java.lang.Object.hashCode.

Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by java.util.HashMap.

The general contract of hashCode is:

Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

Returns:int

a hash code value for this object.

Annotations

@Override

size back to summary

size	back to summary
public long size() Implements abstract jnr.ffi.Pointer.size. Doc from jnr.ffi.Pointer.size. Gets the size of this memory object in bytes (optional operation). Returns:long the size of the memory area this `Pointer` points to. If the size is unknown, `java.lang.Long#MAX_VALUE` is returned}.

public long size()

Implements abstract jnr.ffi.Pointer.size.

Doc from jnr.ffi.Pointer.size.

Gets the size of this memory object in bytes (optional operation).

Returns:long: the size of the memory area this Pointer points to. If the size is unknown, java.lang.Long#MAX_VALUE is returned}.

public final Class DefaultObjectReferenceManager

Nested and Inner Type Summary

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

private final Class DefaultObjectReferenceManager.ObjectReference

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail