Mega Code Archive
Mutable Integer
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/**
* created Aug 13, 2004
*
* @by Thorsten Meinl (Thorsten.Meinl@informatik.uni-erlangen.de)
*
* Copyright 2006 Thorsten Meinl
*
* This file is part of parsemis.
*
* Licence:
* LGPL: http://www.gnu.org/licenses/lgpl.html
* EPL: http://www.eclipse.org/org/documents/epl-v10.php
* See the LICENSE file in the project's top-level directory for details.
*/
//package de.parsemis.utils;
/**
* This class is the same as Integer but the stored value can be changed.
*
* @author Thorsten Meinl (Thorsten.Meinl@informatik.uni-erlangen.de)
*
*/
public class MutableInteger extends Number implements
Comparable<MutableInteger>, SynchronizedCounter {
private static final long serialVersionUID = 532556164094282571L;
private int m_value;
/**
* Creates a new MutableInteger with the given initial value.
*
* @param value
* the value
*/
public MutableInteger(final int value) {
m_value = value;
}
/*
* (non-Javadoc)
*
* @see java.lang.Comparable#compareTo(java.lang.Object)
*/
public int compareTo(final MutableInteger o) {
return m_value - o.m_value;
}
/**
* Decrements the value by one.
*
* @return the new value
*/
public int dec() {
return --m_value;
}
/*
* (non-Javadoc)
*
* @see java.lang.Number#doubleValue()
*/
@Override
public double doubleValue() {
return m_value;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(final Object obj) {
if (obj == null || !(obj instanceof MutableInteger)) {
return false;
}
return m_value == ((MutableInteger) obj).m_value;
}
/*
* (non-Javadoc)
*
* @see java.lang.Number#floatValue()
*/
@Override
public float floatValue() {
return m_value;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
return m_value;
}
/**
* Increments the value by one.
*
* @return the new value
*/
public int inc() {
return ++m_value;
}
/*
* (non-Javadoc)
*
* @see java.lang.Number#intValue()
*/
@Override
public int intValue() {
return m_value;
}
/*
* (non-Javadoc)
*
* @see java.lang.Number#longValue()
*/
@Override
public long longValue() {
return m_value;
}
/*
* (non-Javadoc)
*
* @see de.parsemis.utils.Counter#next()
*/
public synchronized int next() {
return m_value++;
}
/**
* Sets the value to a new value
*
* @param value
* the new value
*/
public void setValue(final int value) {
m_value = value;
}
}
interface SynchronizedCounter {
public int next();
}
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