/*
 * Copyright 1999-2006 University of Chicago
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.globus.io.streams;

import java.io.IOException;

import org.globus.ftp.GridFTPClient;
import org.globus.ftp.Session;
import org.globus.ftp.DataChannelAuthentication;
import org.globus.ftp.exception.FTPException;
import org.globus.gsi.gssapi.auth.Authorization;
import org.globus.gsi.gssapi.auth.HostAuthorization;

import org.ietf.jgss.GSSCredential;

public class GridFTPInputStream extends FTPInputStream {

    public GridFTPInputStream(GSSCredential cred,
			      String host,
			      int port,
			      String file)
	throws IOException, FTPException {
	this(cred, HostAuthorization.getInstance(),
	     host, port,
	     file, true, Session.TYPE_IMAGE, true);
    }

    public GridFTPInputStream(GSSCredential cred,
			      Authorization auth,
			      String host,
			      int port,
			      String file,
			      boolean reqDCAU)
	throws IOException, FTPException {
	this(cred, auth, host, port,
	     file, true, Session.TYPE_IMAGE, reqDCAU);
    }

    public GridFTPInputStream(GSSCredential cred,
			      Authorization auth,
			      String host,
			      int port,
			      String file,
			      boolean passive,
			      int type,
			      boolean reqDCAU)
	throws IOException, FTPException {
	GridFTPClient gridFtp = new GridFTPClient(host, port);
	gridFtp.setAuthorization(auth);
	gridFtp.authenticate(cred);

	if (gridFtp.isFeatureSupported("DCAU")) {
	    if (!reqDCAU) {
		gridFtp.setDataChannelAuthentication(DataChannelAuthentication.NONE);
	    }
	} else {
	    gridFtp.setLocalNoDataChannelAuthentication();
	}

	ftp = gridFtp;

	get(passive, type, file);
    }

}
