Spring Framework 6.1.4 · org.springframework.aop.target.EmptyTargetSource

Modifier and Type	Field and Description
public static final EmptyTargetSource	INSTANCE The canonical (Singleton) instance of this `EmptyTargetSource`.
private final boolean	isStatic
private static final long	serialVersionUID use serialVersionUID from Spring 1.2 for interoperability.
private final Class<?>	targetClass

Access	Constructor and Description
private	EmptyTargetSource(Class<?> the target class to expose (may be `null`) targetClass, boolean whether the TargetSource is marked as static isStatic) Create a new instance of the `EmptyTargetSource` class.

Method Summary

Modifier and Type	Method and Description
public boolean	equals(Object the reference object with which to compare. other) Overrides java.lang.Object.equals. Indicates whether some other object is "equal to" this one.
public static EmptyTargetSource	forClass(Class<?> the target Class (may be `null`) targetClass) Return an EmptyTargetSource for the given target Class.
public static EmptyTargetSource	forClass(Class<?> the target Class (may be `null`) targetClass, boolean whether the TargetSource should be marked as static isStatic) Return an EmptyTargetSource for the given target Class.
public Object	getTarget() Implements org.springframework.aop.TargetSource.getTarget. Always returns `null`.
public Class<?>	getTargetClass() Implements org.springframework.aop.TargetSource.getTargetClass. Always returns the specified target Class, or `null` if none.
public int	hashCode() Overrides java.lang.Object.hashCode. Returns a hash code value for this object.
public boolean	isStatic() Overrides default org.springframework.aop.TargetSource.isStatic. Always returns `true`.
private Object	readResolve() Returns the canonical instance on deserialization in case of no target class, thus protecting the Singleton pattern.
public String	toString() Overrides java.lang.Object.toString. Returns a string representation of the object.

Inherited from java.lang.Object:: clone finalize getClass notify notifyAll wait wait wait

INSTANCE	back to summary
public static final EmptyTargetSource INSTANCE The canonical (Singleton) instance of this `EmptyTargetSource`.

isStatic	back to summary
private final boolean isStatic

serialVersionUID	back to summary
private static final long serialVersionUID use serialVersionUID from Spring 1.2 for interoperability.

targetClass	back to summary
private final Class<?> targetClass Annotations @Nullable

EmptyTargetSource	back to summary
private EmptyTargetSource(Class<?> targetClass, boolean isStatic) Create a new instance of the `EmptyTargetSource` class. This constructor is `private` to enforce the Singleton pattern / factory method pattern. Parameters targetClass:Class<?> the target class to expose (may be `null`) isStatic:boolean whether the TargetSource is marked as static

Method Detail

equals back to summary

equals	back to summary
public boolean equals(Object other) 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 other: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 other)

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

other: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

forClass back to summary

forClass	back to summary
public static EmptyTargetSource forClass(Class<?> targetClass) Return an EmptyTargetSource for the given target Class. Parameters targetClass:Class<?> the target Class (may be `null`) See Also `getTargetClass()`

public static EmptyTargetSource forClass(Class<?> targetClass)

Return an EmptyTargetSource for the given target Class.

Parameters

targetClass:Class<?>: the target Class (may be null)

See Also

getTargetClass()

forClass back to summary

forClass	back to summary
public static EmptyTargetSource forClass(Class<?> targetClass, boolean isStatic) Return an EmptyTargetSource for the given target Class. Parameters targetClass:Class<?> the target Class (may be `null`) isStatic:boolean whether the TargetSource should be marked as static See Also `getTargetClass()`

public static EmptyTargetSource forClass(Class<?> targetClass, boolean isStatic)

Return an EmptyTargetSource for the given target Class.

Parameters

targetClass:Class<?>: the target Class (may be null)
isStatic:boolean: whether the TargetSource should be marked as static

See Also

getTargetClass()

getTarget back to summary

getTarget	back to summary
public Object getTarget() Implements org.springframework.aop.TargetSource.getTarget. Always returns `null`. Returns:Object Doc from org.springframework.aop.TargetSource.getTarget. the target object which contains the joinpoint, or `null` if there is no actual target instance Annotations @Override @Nullable

public Object getTarget()

Implements org.springframework.aop.TargetSource.getTarget.

Always returns null.

Returns:Object

Doc from org.springframework.aop.TargetSource.getTarget.

the target object which contains the joinpoint, or null if there is no actual target instance

Annotations

@Override
@Nullable

getTargetClass back to summary

getTargetClass	back to summary
public Class<?> getTargetClass() Implements org.springframework.aop.TargetSource.getTargetClass. Always returns the specified target Class, or `null` if none. Returns:Class<?> Doc from org.springframework.aop.TargetSource.getTargetClass. the type of targets returned by this `TargetSource` Annotations @Override @Nullable

public Class<?> getTargetClass()

Implements org.springframework.aop.TargetSource.getTargetClass.

Always returns the specified target Class, or null if none.

Returns:Class<?>

Doc from org.springframework.aop.TargetSource.getTargetClass.

the type of targets returned by this TargetSource

Annotations

@Override
@Nullable

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 this 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 this 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

isStatic back to summary

isStatic	back to summary
public boolean isStatic() Overrides default org.springframework.aop.TargetSource.isStatic. Always returns `true`. Returns:boolean Doc from org.springframework.aop.TargetSource.isStatic. `true` if the target is immutable Annotations @Override

public boolean isStatic()

Overrides default org.springframework.aop.TargetSource.isStatic.

Always returns true.

Returns:boolean

Doc from org.springframework.aop.TargetSource.isStatic.

true if the target is immutable

Annotations

@Override

readResolve	back to summary
private Object readResolve() Returns the canonical instance on deserialization in case of no target class, thus protecting the Singleton pattern.

toString back to summary

toString	back to summary
public String toString() Overrides java.lang.Object.toString. Doc from java.lang.Object.toString. Returns a string representation of the object. Satisfying this method's contract implies a non-`null` result must be returned. Returns:String a string representation of the object Annotations @Override

public String toString()

Overrides java.lang.Object.toString.

Doc from java.lang.Object.toString.

Returns a string representation of the object. Satisfying this method's contract implies a non-null result must be returned.

Returns:String

a string representation of the object

Annotations

@Override

public final Class EmptyTargetSource

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