/*
* Copyright 2010 BetaSteward_at_googlemail.com. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY BetaSteward_at_googlemail.com ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BetaSteward_at_googlemail.com OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of BetaSteward_at_googlemail.com.
*/
package mage.counters;
import java.io.Serializable;
import org.apache.log4j.Logger;
/**
* @author BetaSteward_at_googlemail.com
*/
public class Counter implements Serializable {
private static final Logger logger = Logger.getLogger(Counter.class);
protected final String name;
protected int count;
/**
* Creates a {@link Counter} with the provided {@code name} and a default
* value of 1
*
* @param name the name of this counter.
*/
public Counter(final String name) {
this.name = name;
this.count = 1;
}
/**
* Creates a {@link Counter} with the provided {@code name} and
* {@code count}
*
* @param name the name of this counter.
* @param count the value of this counter.
*/
public Counter(final String name, final int count) {
this.name = name;
this.count = count;
}
/**
* Creates a {@link Counter} from an existing {@link Counter} object.
*
* @param counter the {@link Counter} to create a copy from.
*/
public Counter(final Counter counter) {
this.name = counter.name;
this.count = counter.count;
}
/**
* Adds the passed in {@code amount} to the {@code count}
*
* @param amount the value to add to the {@code count}
*/
public void add(int amount) {
count += amount;
}
/**
* Decreases the {@code count} by one. Will not allow the count to be less
* than 0. If an attempt is made to make the count be less than zero, the
* call will be logged.
*/
public void decrease() {
if (count > 0) {
count--;
} else {
logger.warn("An attempt was made to set the counter '" + name
+ "' to less than 0. Setting to 0.");
}
}
/**
* Decreases the {@code count} by the passed in {@code amount}. Will not
* allow the count to be less than 0. If an attempt is made to make the
* count be less than zero, the call will be logged.
*
* @param amount
*/
public void remove(int amount) {
if (count >= amount) {
count -= amount;
} else {
logger.warn("An attempt was made to set the counter '" + name
+ "' to less than 0. Setting to 0.");
count = 0;
}
}
/**
* Returns the name of this {@link Counter}
*
* @return the name of this {@link Counter}
*/
public String getName() {
return name;
}
/**
* Returns the count of this {@link Counter}
*
* @return the count of this {@link Counter}
*/
public int getCount() {
return count;
}
/**
* Returns a deep copy of this object.
*
* @return a deep copy of this object.
*/
public Counter copy() {
return new Counter(this);
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
Counter counter = (Counter) o;
return count == counter.count && !(name != null ? !name.equals(counter.name) : counter.name != null);
}
@Override
public int hashCode() {
int result = name != null ? name.hashCode() : 0;
result = 31 * result + count;
return result;
}
}