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package de.lmu.ifi.dbs.elki.index.tree;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2011
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* Represents a component in an IndexPath. A component in an IndexPath consists
* of the entry of the index (representing a node or a data object) and the
* index of the component in its parent.
*
* @author Elke Achtert
* @param <E> the type of Entry used in the index
*/
public class TreeIndexPathComponent<E extends Entry> {
/**
* The entry of this component.
*/
private E entry;
/**
* The index of this component in its parent.
*/
private Integer index;
/**
* Creates a new IndexPathComponent.
*
* @param entry the entry of the component
* @param index index of the component in its parent
*/
public TreeIndexPathComponent(E entry, Integer index) {
this.entry = entry;
this.index = index;
}
/**
* Returns the entry of the component.
*
* @return the entry of the component
*/
public E getEntry() {
return entry;
}
/**
* Returns the index of the component in its parent.
*
* @return the index of the component in its parent
*/
public Integer getIndex() {
return index;
}
/**
* Returns <code>true</code> if <code>this == o</code> has the value
* <code>true</code> or o is not null and o is of the same class as this
* instance and if the entry of this component equals the entry of the o
* argument, <code>false</code> otherwise.
*/
@Override
@SuppressWarnings("unchecked")
public boolean equals(Object o) {
if(this == o) {
return true;
}
if(o == null || getClass() != o.getClass()) {
return false;
}
final TreeIndexPathComponent<E> that = (TreeIndexPathComponent<E>) o;
return (this.entry.equals(that.entry));
}
/**
* Returns a hash code for this component. The hash code of a
* TreeIndexPathComponent is defined to be the hash code of its entry.
*
* @return the hash code of the entry of this component
*/
@Override
public int hashCode() {
return entry.hashCode();
}
/**
* Returns a string representation of this component.
*
* @return a string representation of the entry of this component followd by
* the index of this component in its parent
*/
@Override
public String toString() {
return entry.toString() + " [" + index + "]";
}
}
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