Egge at 02:31, 1 October 2007

2007-10-01T02:31:55Z

← Older revision		Revision as of 02:31, 1 October 2007
Line 86:		Line 86:
	}		}
	</geshi>		</geshi>

			[[Category:Java]]

Brianegge at 12:50, 12 September 2007

2007-09-12T12:50:21Z

@@ Line 60: / Line 60: @@
      public String toString() {
          return min + ".." + max;
+     }
+}
 </geshi>

Brianegge: New page: Martin Fowler has written about the http://martinfowler.com/eaaDev/Range.html Range Base Pattern for representing a range of values. Here's a generic base class I wrote in Java which ...

2007-09-12T12:44:57Z

New page: Martin Fowler has written about the http://martinfowler.com/eaaDev/Range.html Range Base Pattern for representing a range of values. Here's a generic base class I wrote in Java which ...

New page

Martin Fowler has written about the [[http://martinfowler.com/eaaDev/Range.html Range Base Pattern]] for representing a range of values. Here's a generic base class I wrote in Java which has the same basic functionality. I usually subclass this and add type specific methods.

<geshi lang="java">
/**
* A generic range. I would prefer to define this as Range<E extends Comparable<? super E>>,
* but then pre 1.5 types can't be used with this.
* Additionally, you run into hell when you have Base implements Comparable<Base> and want to have
* Derived extends Base. Derived can't implement Comparable<Derived> because it's already defined differently
* in the base class.
*/
public class Range<E extends Comparable> {
protected final E min;
protected final E max;

public Range(E min, E max) {
GuardHelper.notNullMultiple(min, max);
validate(min, max);
this.min = min;
this.max = max;
}

protected void validate(E min, E max) {
if (min.compareTo(max) > 0) {
throw new IllegalArgumentException(min + " < " + max);
}
}

public boolean contains(E value) {
return value != null && min.compareTo(value) <= 0
&& max.compareTo(value) >= 0;
}

public E getMinimum() {
return min;
}

public E getMaximum() {
return max;
}

public int hashCode() {
return min.hashCode() + max.hashCode();
}

public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}

Range range = (Range) o;

return max.equals(range.max) && min.equals(range.min);
}

@Override
public String toString() {
return min + ".." + max;
}
}
</geshi>

Range - Revision history

Egge at 02:31, 1 October 2007

Brianegge at 12:50, 12 September 2007

Brianegge: New page: Martin Fowler has written about the http://martinfowler.com/eaaDev/Range.html Range Base Pattern for representing a range of values. Here's a generic base class I wrote in Java which ...