jlibs.core.graph.sequences.ArraySequence Maven / Gradle / Ivy
/**
* Copyright 2015 Santhosh Kumar Tekuri
*
* The JLibs authors license this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package jlibs.core.graph.sequences;
/**
* @author Santhosh Kumar T
*/
public class ArraySequence extends AbstractSequence{
private E[] array;
private int start;
private int end;
public ArraySequence(E... array){
this(array, 0, array.length);
}
public ArraySequence(E[] array, int start, int end){
if(start<0)
throw new ArrayIndexOutOfBoundsException(start);
if(end>array.length)
throw new ArrayIndexOutOfBoundsException(end);
if(start>end)
throw new IllegalArgumentException(String.format("start(%d) must be less than or equal to end(%d)", start, end));
this.array = array;
this.start = start;
this.end = end;
_reset();
}
/*-------------------------------------------------[ Advancing ]---------------------------------------------------*/
private int pos;
@Override
protected E findNext(){
pos++;
return pos copy(){
return new ArraySequence(array, start, end);
}
/*-------------------------------------------------[ Optimization ]---------------------------------------------------*/
@Override
public int length(){
return end-start;
}
}