org.apache.metamodel.util

Class BaseObject

java.lang.Object

org.apache.metamodel.util.BaseObject

Direct Known Subclasses:

AbstractDataSet, AbstractQueryClause, AbstractRelationship, CsvConfiguration, ExcelConfiguration, FilterItem, FixedWidthConfiguration, FromItem, GroupByItem, HBaseConfiguration, InitFromBuilderImpl, OrderByItem, Query, SelectItem, StyleImpl

public abstract class BaseObject
extends Object

A base object type with conveniently implemented base methods like hashCode() and equals(). Subclasses should implement the decorateIdentity(List) method to have equals(Object) and hashCode() automatically implemented.

Constructor Summary

Constructors

Constructor and Description
BaseObject()

Method Summary

Modifier and Type	Method and Description
protected boolean	classEquals(BaseObject obj) Override this method if the equals method should support different subtypes.
protected abstract void	decorateIdentity(List<Object> identifiers) Subclasses should implement this method and add all fields to the list that are to be included in equals(...) and hashCode() evaluation
boolean	equals(Object obj)
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

BaseObject

public BaseObject()

Method Detail

toString

public String toString()

Overrides:

toString in class Object

hashCode

public final int hashCode()

Overrides:

hashCode in class Object

classEquals

protected boolean classEquals(BaseObject obj)

Override this method if the equals method should support different subtypes. For example, if different subtypes of Number should be supported, implement this method with: obj instanceof Number and make sure that the decorateIdentity(...) method will always return a comparable list of identity-objects.

Parameters:

obj -

Returns:

true if the provided object's class is accepted for equals comparison

equals

public final boolean equals(Object obj)

Overrides:

equals in class Object

decorateIdentity

protected abstract void decorateIdentity(List<Object> identifiers)

Subclasses should implement this method and add all fields to the list that are to be included in equals(...) and hashCode() evaluation

Parameters:

identifiers -