SingleClassLoaderResolver

public class SingleClassLoaderResolver implements ClassLoaderResolver

saker.util.classloader.SingleClassLoaderResolver

java.lang.Object

saker.util.classloader.ClassLoaderResolver

ClassLoaderResolver implementation that is capable of resolving a specific classloader.

This class is constructed with an identifier-classloader pair. If the implementation is asked to get the identifier, or retrieve the classloader, the associated value for the mentioned pair will be returned.

Constructors

public	SingleClassLoaderResolver(String identifier, ClassLoader classLoader) Creates a new instance for the given identifier and classloader.

Methods

public boolean	equals(Object obj) Indicates whether some other object is "equal to" this one.
public ClassLoader	getClassLoader() Gets the classloader that this resolver handles.
public ClassLoader	getClassLoaderForIdentifier(String identifier) Looks up a classloader for a given classloader identifier.
public String	getClassLoaderIdentifier(ClassLoader classloader) Gets the classloader identifier for the argument classloader.
public String	getIdentifier() Gets the classloader identifier that this resolver returns.
public int	hashCode() Returns a hash code value for the object.
public String	toString() Returns a string representation of the object.

Inherited methods
From: Object clone, finalize, getClass, notify, notifyAll, wait, wait, wait

public SingleClassLoaderResolver(String identifier, ClassLoader classLoader) throws NullPointerException

Creates a new instance for the given identifier and classloader.

identifierThe classloader identifier.

classLoaderThe classloader.

NullPointerExceptionIf any of the arguments are null.

public boolean equals(Object obj)

Overridden from: Object

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.

The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any non-null reference values x and y, this method returns true if and only if x and y refer to the same object (x == y has the value true).

Note that it is generally necessary to override the hashCode method whenever this method is overridden, so as to maintain the general contract for the hashCode method, which states that equal objects must have equal hash codes.

objthe reference object with which to compare.

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

Object.hashCode()

HashMap

public ClassLoader getClassLoader()

Gets the classloader that this resolver handles.

The classloader.

public ClassLoader getClassLoaderForIdentifier(String identifier)

Overridden from: ClassLoaderResolver

Looks up a classloader for a given classloader identifier.

Implementations can look up a classloader for a given identifier. They should examine the identifier, and based on its format look for a matching classloader. If the identifier is not recognized by this resolver, return null, so the deserializing stream can ask other resolvers to identify the classloader.

It is possible, that the resolver recognizes the format of the identifier, but doesn't find a classloader for it. This might be the case when the underlying implementation for a class has been changed, and therefore the generated classloader identifier for it as well. In this case the resolver should return null, to signal that the classloader is not found for the identifier.

Implementations of this method should not throw any exceptions.

identifierThe classloader identifier.

The found classloader or null if this resolver didn't find an associated classloader for it.

public String getClassLoaderIdentifier(ClassLoader classloader)

Overridden from: ClassLoaderResolver

Gets the classloader identifier for the argument classloader.

Implementations may not handle all classloaders, but only the ones they know about. If the implementation doesn't recognize a given classloader, it should return null from this method. Returning null means that the serializing stream can look at other resolvers for an appropriate identifier.

Implementations of this method should not throw any exceptions.

classloaderThe classloader to get the identifier for.

The classloader identifier, or null if this resolver doesn't recognize the argument classloader.

public String getIdentifier()

Gets the classloader identifier that this resolver returns.

The identifier.

public int hashCode()

Overridden from: Object

Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by 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(Object) 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 Object.equals(Object) 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.

As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the Java™ programming language.)

a hash code value for this object.

Object.equals(Object)

System.identityHashCode(Object)

public String toString()

Overridden from: Object

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:

 getClass().getName() + '@' + Integer.toHexString(hashCode())

a string representation of the object.