StringInBlocks.java

/*
 * Copyright 2021 Gregory Graham.
 *
 * Commercial licenses are available, please contact info@gregs.co.nz for details.
 * 
 * This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. 
 * To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/4.0/ 
 * or send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.
 * 
 * You are free to:
 *     Share - copy and redistribute the material in any medium or format
 *     Adapt - remix, transform, and build upon the material
 * 
 *     The licensor cannot revoke these freedoms as long as you follow the license terms.               
 *     Under the following terms:
 *                 
 *         Attribution - 
 *             You must give appropriate credit, provide a link to the license, and indicate if changes were made. 
 *             You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
 *         NonCommercial - 
 *             You may not use the material for commercial purposes.
 *         ShareAlike - 
 *             If you remix, transform, or build upon the material, 
 *             you must distribute your contributions under the same license as the original.
 *         No additional restrictions - 
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 *             license permits.
 * 
 * Check the Creative Commons website for any details, legalese, and updates.
 */
package nz.co.gregs.dbvolution.utility;

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

/**
 *
 * @author gregorygraham
 */
public class StringInBlocks {

	private String originalString;
	private int blockSize;

	private StringInBlocks() {
	}

	public static StringInBlocks ofSize(int blockSize) {
		StringInBlocks newone = new StringInBlocks();
		newone.blockSize = blockSize;
		return newone;
	}

	public List<String> from(String input) {
		this.originalString = input;
		return getBlocks();
	}

	public synchronized List<String> getBlocks() {
		List<String> blocks = new ArrayList<>(0);
		String input = originalString;
		while (input.length() > blockSize) {
			blocks.add(input.substring(0, blockSize));
			input = input.substring(blockSize);
		}
		if (input.length() > 0) {
			blocks.add(input);
		}
		return blocks;
	}
}