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/*******************************************************************************
* Copyright (c) 2007, 2010 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* Sonatype, Inc. - transport split
*******************************************************************************/
package org.eclipse.equinox.internal.p2.repository;
import java.io.*;
import java.net.URI;
import org.eclipse.core.runtime.*;
import org.eclipse.equinox.internal.provisional.p2.repository.IStateful;
public abstract class Transport {
public static final String SERVICE_NAME = Transport.class.getName();
/**
* Perform a download, writing into the target output stream. Progress is reported on the
* monitor. If the <code>target</code> is an instance of {@link IStateful} the resulting status
* is also set on the target. An IStateful target is updated with status even if this methods
* throws {@link OperationCanceledException}.
*
* @returns IStatus, that is a {@link DownloadStatus} on success.
* @param toDownload URI of file to download
* @param target OutputStream where result is written
* @param startPos the starting position of the download, or -1 for from start
* @param monitor where progress should be reported
* @throws OperationCanceledException if the operation was canceled.
*/
public abstract IStatus download(URI toDownload, OutputStream target, long startPos, IProgressMonitor monitor);
/**
* Perform a download, writing into the target output stream. Progress is reported on the
* monitor. If the <code>target</code> is an instance of {@link IStateful} the resulting status
* is also set on the target.
*
* @returns IStatus, that is a {@link DownloadStatus} on success.
* @param toDownload URI of file to download
* @param target OutputStream where result is written
* @param monitor where progress should be reported
* @throws OperationCanceledException if the operation was canceled.
*/
public abstract IStatus download(URI toDownload, OutputStream target, IProgressMonitor monitor);
/**
* Perform a stream download, writing into an InputStream that is returned. Performs authentication if needed.
*
* @returns InputStream a stream with the content from the toDownload URI, or null
* @param toDownload URI of file to download
* @param monitor monitor checked for cancellation
* @throws OperationCanceledException if the operation was canceled.
* @throws AuthenticationFailedException if authentication failed, or too many attempt were made
* @throws FileNotFoundException if the toDownload was reported as non existing
* @throws CoreException on errors
*/
public abstract InputStream stream(URI toDownload, IProgressMonitor monitor) throws FileNotFoundException, CoreException, AuthenticationFailedException;
/**
* Returns the last modified date for a URI. A last modified of 0 typically indicates that
* the server response is wrong, but should not be interpreted as a file not found.
* @param toDownload
* @param monitor
* @throws OperationCanceledException if the operation was canceled by the user.
* @return last modified date (possibly 0)
*/
public abstract long getLastModified(URI toDownload, IProgressMonitor monitor) throws CoreException, FileNotFoundException, AuthenticationFailedException;
}
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