package de.se.buzzer.handler;

import java.util.ArrayList;
import java.util.List;

import de.se.buzzer.LineContainer;

/**
 * @author M. Friedeboldt
 */
public class AnswerHandler {

    private ContentLoaderInterface loaderInterface;

    private int                    count;

    private List<LineContainer>    contentList;

    /**
     * @param loaderInterface
     */
    public AnswerHandler(ContentLoaderInterface loaderInterface) {
        this.loaderInterface = loaderInterface;
    }

    /**
     * @param count
     */
    public void setCount(int count) {
        this.count = count;
    }

    /**
     * @param lines
     */
    public void putLines(List<LineContainer> lines) {
        if ( this.contentList == null )
            contentList = new ArrayList<LineContainer>();

        contentList.addAll( lines );
    }

    /**
     * @param index
     * @param max
     * @return
     */
    public List<LineContainer> getLines(int index, int max) throws Exception {
        if ( this.contentList == null || this.contentList.size() == 0 || this.contentList.size() <= index ) {
            // nachladen
            putLines( loaderInterface.loadLineContainers( index ) );
        }

        List<LineContainer> res = new ArrayList<LineContainer>();
        for ( int i = index; i < (index + max); i++ ) {
            if ( contentList.size() > i )
                res.add( contentList.get( i ) );
        }

        return res;
    }
}