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/*
 * ===========================================
 * Java Pdf Extraction Decoding Access Library
 * ===========================================
 *
 * Project Info:  http://www.idrsolutions.com
 * Help section for developers at http://www.idrsolutions.com/support/
 *
 * (C) Copyright 1997-2017 IDRsolutions and Contributors.
 *
 * This file is part of JPedal/JPDF2HTML5
 *
     This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


 *
 * ---------------
 * Vector_boolean.java
 * ---------------
 */
package org.jpedal.utils.repositories;

import java.io.Serializable;

/**
 * Provides the functionality/convenience of a Vector for boolean
 *
 * Much faster because not synchronized and no cast
 * Does not double in size each time
 */
public class Vector_boolean implements Serializable {
    
    
    //how much we resize each time - will be doubled up to 160
    int  increment_size = 1000;
    
    //current max size
    int  max_size = 250;
    
    //holds the data
    private boolean[] items = new boolean[max_size];
    
    
    protected static int incrementSize(int increment_size){
        
        if(increment_size<8000) {
            increment_size *= 4;
        } else if(increment_size<16000) {
            increment_size *= 2;
        } else {
            increment_size += 2000;
        }
        return increment_size;
    }
    
    //set size
    public Vector_boolean( final int number )
    {
        max_size = number;
        items = new boolean[max_size];
    }
    ///////////////////////////////////
    /**
     * extract underlying data
     */
    public final boolean[] get()
    {
        return items;
    }
    ///////////////////////////////////
    /**
     * set an element
     */
    public final void setElementAt( final boolean new_name, final int id )
    {
        if( id >= max_size ) {
            checkSize( id );
        }
        items[id] = new_name;
    }
    
    /**
     * get element at
     */
    public final boolean elementAt( final int id )
    {
        if( id >= max_size ) {
            return false;
        } else {
            return items[id];
        }
    }
    
    /**
     * check the size of the array and increase if needed
     */
    private void checkSize( final int i )
    {
       if( i >= max_size ){
            final int old_size = max_size;
            max_size += increment_size;
            
            //allow for it not creating space
            if( max_size <= i ) {
                max_size = i +increment_size+ 2;
            }
            final boolean[] temp = items;
            items = new boolean[max_size];

            System.arraycopy( temp, 0, items, 0, old_size );
            
            increment_size=incrementSize(increment_size);

        }
    }
    
}