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/*
Wotonomy: OpenStep design patterns for pure Java applications.
Copyright (C) 2000 Michael Powers
This library 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 library 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 library; if not, see http://www.gnu.org
*/
package net.wotonomy.datastore;
import java.io.Serializable;
import net.wotonomy.foundation.internal.ValueConverter;
/**
* Represents an abstract key for a piece of data
*
*/
public class DataKey implements Comparable<Object>, Serializable, Cloneable {
static final long serialVersionUID = 8421127539579065705L;
Long key;
public DataKey() {
key = 0L;
}
/**
* Converts string representation to new object.
*/
public DataKey(String aString) {
this();
setKeyString(aString);
}
@Override
public int hashCode() {
return key.intValue();
}
public void increment() {
key = Long.valueOf(key.longValue() + 1);
}
@Override
public Object clone() {
return new DataKey(this.toString());
}
@Override
public String toString() {
return key.toString();
}
public String getKeyString() {
return key.toString();
}
public void setKeyString(String aString) {
Long parsed = ValueConverter.getLong(aString);
if (parsed != null)
key = parsed;
}
@Override
public boolean equals(Object anObject) {
if (anObject instanceof String) {
if (toString().equals(anObject)) {
return true;
}
}
if (!(anObject instanceof DataKey))
return false;
return key.equals(((DataKey) anObject).key);
}
@Override
public int compareTo(Object anObject) {
if (anObject instanceof String) {
if (toString().equals(anObject)) {
return 0;
}
}
if (!(anObject instanceof DataKey)) {
Long converted = (Long) ValueConverter.getLong(anObject);
if (converted != null) {
return (int) (key.longValue() - converted.longValue());
}
return 0;
}
;
return (int) (key.longValue() - ((DataKey) anObject).key.longValue());
}
}
/*
* $Log$ Revision 1.2 2006/02/19 16:26:19 cgruber Move non-unit-test code to
* tests project Fix up code to work with proper imports Fix maven dependencies.
*
* Revision 1.1 2006/02/16 13:18:56 cgruber Check in all sources in
* eclipse-friendly maven-enabled packages.
*
* Revision 1.4 2003/08/14 19:29:38 chochos minor cleanup (imports, static
* method calls, etc)
*
* Revision 1.3 2001/02/23 23:44:44 mpowers Fixes for hashcode to ensure proper
* key comparison.
*
* Revision 1.2 2001/02/15 21:12:41 mpowers Added accessors for key throughout
* the api. This breaks compatibility. insertObject now returns the permanent
* key for the newly created object. The old way returned a copy of the object
* which was an additional read that was often ignored. Now you can read it only
* if you need it. Furthermore, there was not other way of getting the permanent
* key.
*
* Revision 1.1.1.1 2000/12/21 15:47:04 mpowers Contributing wotonomy.
*
* Revision 1.2 2000/12/20 16:25:36 michael Added log to all files.
*
*
*/
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