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JPMML class model

There is a newer version: 1.6.6

/*
 * Copyright (c) 2016 Villu Ruusmann
 */
package org.jpmml.model.collections;

import java.io.Serializable;
import java.util.Collections;
import java.util.List;
import java.util.RandomAccess;

public class SingletonList extends AbstractFixedSizeList implements RandomAccess, Serializable {

	private E element = null;


	public SingletonList(E element){
		this.element = element;
	}

	@Override
	public int size(){
		return 1;
	}

	@Override
	public boolean isEmpty(){
		return false;
	}

	@Override
	public E get(int index){

		switch(index){
			case 0:
				return this.element;
			default:
				throw new IndexOutOfBoundsException();
		}
	}

	@Override
	public E set(int index, E element){
		E result;

		switch(index){
			case 0:
				result = this.element;
				this.element = element;
				return result;
			default:
				throw new IndexOutOfBoundsException();
		}
	}

	@Override
	public List subList(int fromIndex, int toIndex){

		if(fromIndex < 0 || toIndex > 1){
			throw new IndexOutOfBoundsException();
		}

		int length = (toIndex - fromIndex);
		switch(length){
			case 0:
				return Collections.emptyList();
			case 1:
				return this;
			default:
				throw new IllegalArgumentException();
		}
	}
}