public abstract class AttributeAccessorSupport extends Object implements AttributeAccessor, Serializable
AttributeAccessors, providing
 a base implementation of all methods. To be extended by subclasses.
 Serializable if subclasses and all attribute values are Serializable.
| Constructor and Description | 
|---|
| AttributeAccessorSupport() | 
| Modifier and Type | Method and Description | 
|---|---|
| String[] | attributeNames()Return the names of all attributes. | 
| protected void | copyAttributesFrom(AttributeAccessor source)Copy the attributes from the supplied AttributeAccessor to this accessor. | 
| boolean | equals(Object other) | 
| Object | getAttribute(String name)Get the value of the attribute identified by  name. | 
| boolean | hasAttribute(String name)Return  trueif the attribute identified bynameexists. | 
| int | hashCode() | 
| Object | removeAttribute(String name)Remove the attribute identified by  nameand return its value. | 
| void | setAttribute(String name,
            Object value)Set the attribute defined by  nameto the suppliedvalue. | 
public void setAttribute(String name, @Nullable Object value)
AttributeAccessorname 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.
setAttribute in interface AttributeAccessorname - the unique attribute keyvalue - the attribute value to be attached@Nullable public Object getAttribute(String name)
AttributeAccessorname.
 Return null if the attribute doesn't exist.getAttribute in interface AttributeAccessorname - the unique attribute key@Nullable public Object removeAttribute(String name)
AttributeAccessorname and return its value.
 Return null if no attribute under name is found.removeAttribute in interface AttributeAccessorname - the unique attribute keypublic boolean hasAttribute(String name)
AttributeAccessortrue if the attribute identified by name exists.
 Otherwise return false.hasAttribute in interface AttributeAccessorname - the unique attribute keypublic String[] attributeNames()
AttributeAccessorattributeNames in interface AttributeAccessorprotected void copyAttributesFrom(AttributeAccessor source)
source - the AttributeAccessor to copy from