public abstract Class AttributeAccessorSupport

Implements org.springframework.core.AttributeAccessor.attributeNames.

Doc from org.springframework.core.AttributeAccessor.attributeNames.

Return the names of all attributes.

Annotations

@Override

Overrides default org.springframework.core.AttributeAccessor.computeAttribute.

Doc from org.springframework.core.AttributeAccessor.computeAttribute.

Compute a new value for the attribute identified by name if necessary and set the new value in this AttributeAccessor.

If a value for the attribute identified by name already exists in this AttributeAccessor, the existing value will be returned without applying the supplied compute function.

The default implementation of this method is not thread safe but can be overridden by concrete implementations of this interface.

Parameters

<T>

the type of the attribute value

name:String

the unique attribute key

computeFunction:Function<String, T>

a function that computes a new value for the attribute name; the function must not return a null value

Returns:T

the existing value or newly computed value for the named attribute

Annotations

@Override

@SuppressWarnings:unchecked

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

Implements org.springframework.core.AttributeAccessor.getAttribute.

Doc from org.springframework.core.AttributeAccessor.getAttribute.

Get the value of the attribute identified by name.

Return null if the attribute doesn't exist.

Parameters

name:String

the unique attribute key

Returns:Object

the current value of the attribute, if any

Annotations

@Override

@Nullable

Implements org.springframework.core.AttributeAccessor.hasAttribute.

Doc from org.springframework.core.AttributeAccessor.hasAttribute.

Return true if the attribute identified by name exists.

Otherwise return false.

Parameters

name:String

the unique attribute key

Annotations

@Override

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

Implements org.springframework.core.AttributeAccessor.removeAttribute.

Doc from org.springframework.core.AttributeAccessor.removeAttribute.

Remove the attribute identified by name and return its value.

Return null if no attribute under name is found.

Parameters

name:String

the unique attribute key

Returns:Object

the last value of the attribute, if any

Annotations

@Override

@Nullable

Implements org.springframework.core.AttributeAccessor.setAttribute.

Doc from org.springframework.core.AttributeAccessor.setAttribute.

Set the attribute defined by name to the supplied value.

If value is null, the attribute is removed.

In general, users should take care to prevent overlaps with other metadata attributes by using fully-qualified names, perhaps using class or package names as prefix.

Parameters

name:String

the unique attribute key

value:Object

the attribute value to be attached

Annotations

@Override