/**
* Copyright (c) Rich Hickey. All rights reserved.
* The use and distribution terms for this software are covered by the
* Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
* which can be found in the file epl-v10.html at the root of this distribution.
* By using this software in any fashion, you are agreeing to be bound by
* the terms of this license.
* You must not remove this notice, or any other, from this software.
**/
/* rich Apr 1, 2008 */
package com.trifork.clj_ds;
public class Range extends ASeq implements IReduce, Counted{
final int end;
final int n;
public Range(int start, int end){
this.end = end;
this.n = start;
}
public Range(IPersistentMap meta, int start, int end){
super(meta);
this.end = end;
this.n = start;
}
public Obj withMeta(IPersistentMap meta){
if(meta == meta())
return this;
return new Range(meta(), end, n);
}
public Object first(){
return n;
}
public ISeq next(){
if(n < end-1)
return new Range(_meta, n + 1, end);
return null;
}
public Object reduce(IFn f) throws Exception{
Object ret = n;
for(int x = n+1;x < end;x++)
ret = f.invoke(ret, x);
return ret;
}
public Object reduce(IFn f, Object start) throws Exception{
Object ret = f.invoke(start,n);
for(int x = n+1;x < end;x++)
ret = f.invoke(ret, x);
return ret;
}
public int count() {
return end - n;
}
}