/* $RCSfile$
* $Author$
* $Date$
* $Revision$
*
* Copyright (C) 2003-2007 Egon Willighagen <egonw@users.sf.net>
*
* Contact: cdk-devel@lists.sourceforge.net
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
package org.openscience.cdk;
import org.openscience.cdk.interfaces.IChemObject;
import org.openscience.cdk.interfaces.IMapping;
import java.util.Iterator;
/**
* A Mapping is an relation between two ChemObjects in a non-chemical
* entity. It is not a Bond, nor a Association, merely a relation.
* An example of such a mapping, is the mapping between corresponding atoms
* in a Reaction.
*
* @cdk.module data
* @cdk.githash
*
* @cdk.keyword reaction, atom mapping
*
* @author Egon Willighagen
* @cdk.created 2003-08-16
*/
public class Mapping extends ChemObject implements java.io.Serializable, Cloneable, IMapping {
/**
* Determines if a de-serialized object is compatible with this class.
*
* This value must only be changed if and only if the new version
* of this class is incompatible with the old version. See Sun docs
* for <a href=http://java.sun.com/products/jdk/1.1/docs/guide
* /serialization/spec/version.doc.html>details</a>.
*/
private static final long serialVersionUID = -6541914644492043503L;
private IChemObject[] relation;
/**
* Constructs an unconnected lone pair.
*
* @param objectOne The first IChemObject of the mapping
* @param objectTwo The second IChemObject of the mapping
*/
public Mapping(IChemObject objectOne, IChemObject objectTwo) {
relation = new IChemObject[2];
relation[0] = objectOne;
relation[1] = objectTwo;
}
/**
* Returns an Iterable to the two IChemObjects.
* Iterable.remove() is not implemented.
*
* @return An Iterable to two IChemObjects that define the mapping
*/
public Iterable<IChemObject> relatedChemObjects() {
return new Iterable<IChemObject>(){
public Iterator<IChemObject> iterator() {
return new ChemObjectIterator();
}
};
}
/**
* The inner Iterator class.
*
*/
private class ChemObjectIterator implements Iterator<IChemObject> {
private int pointer = 0;
public boolean hasNext() {
return pointer < 2;
}
public IChemObject next() {
return relation[pointer++];
}
public void remove() {}
}
/**
* Retrieves the first or second of the related IChemObjects.
*
* @param pos The position of the IChemObject.
* @return The IChemObject to retrieve.
*/
public IChemObject getChemObject(int pos) {
return relation[pos];
}
/**
* Clones this <code>Mapping</code> and the mapped <code>IChemObject</code>s.
*
* @return The cloned object
*/
public Object clone() throws CloneNotSupportedException {
Mapping clone = (Mapping)super.clone();
// clone the related IChemObject's
if (relation != null) {
clone.relation = new IChemObject[relation.length];
for (int f = 0; f < relation.length; f++) {
if (relation[f] != null) {
clone.relation[f] = (IChemObject)relation[f].clone();
}
}
}
return clone;
}
}