de.danielbechler.diff.selector

Class ElementSelector

java.lang.Object

de.danielbechler.diff.selector.ElementSelector

Direct Known Subclasses:

BeanPropertyElementSelector, CollectionItemElementSelector, MapKeyElementSelector, RootElementSelector

public abstract class ElementSelector
extends Object

Serves mainly as marker class and enforces the proper implementation of hashCode(), equals() and toString() for all element selectors.

Author:

Daniel Bechler

Constructor Summary

Constructors

Constructor and Description
ElementSelector()

Method Summary

Methods

Modifier and Type	Method and Description
abstract boolean	equals(Object obj) Must be implemented in a way so that this element can be distinguished from the other ones.
abstract int	hashCode() Make sure to implement this properly.
abstract String	toHumanReadableString()
String	toString() The string representation will only be used to print readable property paths for debug purposes.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ElementSelector

public ElementSelector()

Method Detail

toHumanReadableString

public abstract String toHumanReadableString()

equals

public abstract boolean equals(Object obj)

Must be implemented in a way so that this element can be distinguished from the other ones.

Overrides:

equals in class Object

Parameters:

obj - The object to check equality against.

Returns:

true is the given object equals this one, otherwise false.

hashCode

public abstract int hashCode()

Make sure to implement this properly. If two elements are equal, their hash code must be equal as well. However, it is absolutely okay if two unequal elements return the same hash code. A simple implementation could just return 0.

Overrides:

hashCode in class Object

Returns:

The hash code of this element.

toString

public final String toString()

The string representation will only be used to print readable property paths for debug purposes.

Overrides:

toString in class Object

Returns:

A string representation of this element for debug purposes.