ReplayModCinematic/src/main/java/eu/crushedpixel/replaymod/utils/ZipFileUtils.java

package eu.crushedpixel.replaymod.utils;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;

public class ZipFileUtils {

	public static void deleteZipEntry(File zipFile,
			String[] files) throws IOException {
		// get a temp file
		File tempFile = File.createTempFile(zipFile.getName(), null);
		// delete it, otherwise you cannot rename your existing zip to it.
		tempFile.delete();
		tempFile.deleteOnExit();
		boolean renameOk=zipFile.renameTo(tempFile);
		if (!renameOk)
		{
			throw new RuntimeException("could not rename the file "+zipFile.getAbsolutePath()+" to "+tempFile.getAbsolutePath());
		}
		byte[] buf = new byte[1024];

		ZipInputStream zin = new ZipInputStream(new FileInputStream(tempFile));
		ZipOutputStream zout = new ZipOutputStream(new FileOutputStream(zipFile));

		ZipEntry entry = zin.getNextEntry();
		while (entry != null) {
			String name = entry.getName();
			boolean toBeDeleted = false;
			for (String f : files) {
				if (f.equals(name)) {
					toBeDeleted = true;
					break;
				}
			}
			if (!toBeDeleted) {
				// Add ZIP entry to output stream.
				zout.putNextEntry(new ZipEntry(name));
				// Transfer bytes from the ZIP file to the output file
				int len;
				while ((len = zin.read(buf)) > 0) {
					zout.write(buf, 0, len);
				}
			}
			entry = zin.getNextEntry();
		}
		// Close the streams        
		zin.close();
		// Compress the files
		// Complete the ZIP file
		zout.close();
		tempFile.delete();
	}
	
}