aswi2020horky-gitlab/project/Deserializer/src/io/FileWorker.java @ a5d16f0a

package io;

import java.io.BufferedInputStream;
import java.io.BufferedWriter;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.List;
import java.util.NoSuchElementException;

public class FileWorker {
	
	public static PrintStream createRedirectStream() throws FileNotFoundException {
		return new PrintStream(new File("jdeserialize_log.txt"));
	}
	
	public static byte[] loadByteArray(File file) throws IOException {
		byte fileContent[] = loadFileContent(file);
		byte buffer[];
		
		IZipReader input;
		try {
			input = new ZipInStream(new ByteArrayInputStream(fileContent));
		} catch (NoSuchElementException e) {
			System.out.println("Note: the file may be a special type of ZIP archive.");
			input = new InflaterInStream(new FileInputStream(file));
		}
		
		try {
			List<Byte> _buffer = new ArrayList<Byte>();
			while (true) {
				int value = input.read();
				if (value < 0) {
					break;
				} else {
					_buffer.add((byte) value);
				}
			}

			buffer = new byte[_buffer.size()];
			for (int i = 0; i < buffer.length; i++) {
				buffer[i] = _buffer.get(i);
			}
			
			System.out.println(String.format("The file is a%s ZIP archive...", input.getClass() == InflaterInStream.class ? " special" : ""));
		} catch (Exception e) {
			System.out.println("The file is not a ZIP archive...");
			buffer = fileContent;
		} finally {
			input.close();
		}

		System.out.println("Bytes from the file were loaded correctly.");
		return buffer;
	}

	private static byte[] loadFileContent(File file) throws IOException {
		byte buffer[] = new byte[(int) file.length()];
		BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
		bis.read(buffer);
		bis.close();
		return buffer;
	}
	
	public static void saveJson(File file, String json) throws IOException {
		FileWriter fw = new FileWriter(file);
		BufferedWriter bw = new BufferedWriter(fw);
		bw.write(json);
		bw.flush();
		bw.close();
	}
	
}