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A library to be statically linked. Contains many small utilities. This bundle should not be installed in a framework, it is compile only.

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package aQute.lib.zip;

import java.io.IOException;
import java.util.TimeZone;
import java.util.zip.ZipEntry;

/**
 * This class provides utilities to work with zip files.
 * http://www.opensource.apple.com/source/zip/zip-6/unzip/unzip/proginfo/extra.
 * fld
 */
public class ZipUtil {
	static TimeZone tz = TimeZone.getDefault();

	public static long getModifiedTime(ZipEntry entry) throws IOException {
		long time = entry.getTime();
		time += tz.getOffset(time);
		return Math.min(time, System.currentTimeMillis() - 1);
	}
	////
	//
	// byte[] extra = entry.getExtra();
	// if ( extra != null) try {
	// DataInputStream din = new DataInputStream( new
	//// ByteArrayInputStream(extra));
	//
	// while (din.available() >= 0) {
	// int type = din.readShort();
	// int length = din.readShort();
	//
	// switch(type) {
	// case 0x5455: // timestamp
	// int flags = din.readByte();
	// long modtime = -1L;
	// long acctime = -1L;
	// long crtime = -1L;
	// if ( (flags & 1) != 0) {
	// modtime = din.readInt();
	// modtime *= 1000;
	// }
	// if ( (flags & 2) != 0) {
	// acctime = din.readInt();
	// acctime *= 1000;
	// }
	// if ( (flags & 4) != 0) {
	// crtime = din.readInt();
	// crtime *= 1000;
	// }
	//
	// return modtime;
	//
	// default:
	// din.skipBytes(length);
	// break;
	// }
	// }
	// } catch( Exception e) {
	// // ignore
	// }
	//
	// return entry.getTime();
	// }

	public static void setModifiedTime(ZipEntry entry, long utc) throws IOException {
		// byte[] extra = entry.getExtra();
		// ByteArrayOutputStream bout = new ByteArrayOutputStream();
		// DataOutputStream dout = new DataOutputStream(bout);
		//
		// dout.writeShort(0x5455);
		// dout.writeShort(5);
		// dout.writeByte(1);
		// dout.writeInt((int) (utc/1000));
		//
		// if ( extra != null) try {
		// DataInputStream din = new DataInputStream( new
		// ByteArrayInputStream(extra));
		//
		// while (din.available() >= 0) {
		// int type = din.readShort();
		// int length = din.readShort();
		//
		// switch(type) {
		// case 0x5455: // timestamp
		// din.skipBytes(length);
		// break;
		//
		// default:
		// dout.writeShort(type);
		// dout.writeShort(length);
		// while(length > 0) {
		// dout.writeByte( din.readByte());
		// }
		// break;
		// }
		// }
		//
		// } catch( Exception e) {
		// // ignore
		// }
		// dout.flush();
		// entry.setExtra(bout.toByteArray());

		utc -= tz.getOffset(utc);
		entry.setTime(utc);
	}

}