ByteArrayZipEntryTransformer.java

package com.smartandroid.sa.zip.transform;

import java.io.IOException;
import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

import com.smartandroid.sa.zip.ByteSource;
import com.smartandroid.sa.zip.commons.IOUtils;

public abstract class ByteArrayZipEntryTransformer implements
		ZipEntryTransformer {

	/**
	 * Transforms the given byte array into a new one.
	 */
	protected abstract byte[] transform(ZipEntry zipEntry, byte[] input)
			throws IOException;

	public void transform(InputStream in, ZipEntry zipEntry, ZipOutputStream out)
			throws IOException {
		byte[] bytes = IOUtils.toByteArray(in);
		bytes = transform(zipEntry, bytes);

		ByteSource source;

		if (preserveTimestamps()) {
			source = new ByteSource(zipEntry.getName(), bytes,
					zipEntry.getTime());
		} else {
			source = new ByteSource(zipEntry.getName(), bytes);
		}

		ZipEntrySourceZipEntryTransformer.addEntry(source, out);
	}

	/**
	 * Override to return true if needed.
	 */
	protected boolean preserveTimestamps() {
		return false;
	}

}