CopyStrategy.java

package net.java.dev.weblets.util;

import java.io.InputStream;
import java.io.OutputStream;
import java.io.IOException;

/**
 * Central contractual interface for our copy strategy control usually a copy provider chains some input output streams together to get a certain behavior
 */
public interface CopyStrategy {
    /**
     * central copy method
     *
     * @param the
     *            weblet name the weblet name
     * @param mimetype
     *            the response mimetype
     * @param in
     *            the incoming data input stream
     * @param out
     *            the receiving steam
     * @throws java.io.IOException
     *             in case of an error
     */
    void copy(String webletName, String mimetype, InputStream in, OutputStream out) throws IOException;

    /**
     * wraps the incoming input stream with out post processing filters
     *
     * @param the
     *            weblet name
     * @param in
     *            the incoming stream
     *
     * @return an inputstream with the resource or null if none is found
     * @throws IOException
     *             in case of a severe error
     */
    public InputStream wrapInputStream(String webletName, String mimetype, InputStream in) throws IOException;

}