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 * and other copyright owners as documented in the project's IP log.
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 * This program and the accompanying materials are made available
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 * accompanies this distribution, is reproduced below, and is
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package org.eclipse.jgit.api;

import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.transport.CredentialsProvider;
import org.eclipse.jgit.transport.Transport;

Base class for commands that use a Transport during execution. 
 This class provides standard configuration of a transport for options such as a CredentialsProvider, a timeout, and a TransportConfigCallback. 
Type parameters:
<C> – 
<T> – /**
 * Base class for commands that use a
 * {@link org.eclipse.jgit.transport.Transport} during execution.
 * <p>
 * This class provides standard configuration of a transport for options such as
 * a {@link org.eclipse.jgit.transport.CredentialsProvider}, a timeout, and a
 * {@link org.eclipse.jgit.api.TransportConfigCallback}.
 *
 * @param <C>
 * @param <T>
 */
public abstract class TransportCommand<C extends GitCommand, T> extends
		GitCommand<T> {

	
Configured credentials provider
/**
	 * Configured credentials provider
	 */
	protected CredentialsProvider credentialsProvider;

	
Configured transport timeout
/**
	 * Configured transport timeout
	 */
	protected int timeout;

	
Configured callback for transport configuration
/**
	 * Configured callback for transport configuration
	 */
	protected TransportConfigCallback transportConfigCallback;

	
Constructor for TransportCommand.
Params:
repo – a Repository object./**
	 * <p>Constructor for TransportCommand.</p>
	 *
	 * @param repo a {@link org.eclipse.jgit.lib.Repository} object.
	 */
	protected TransportCommand(Repository repo) {
		super(repo);
		setCredentialsProvider(CredentialsProvider.getDefault());
	}

	
Set the credentialsProvider.
Params:
credentialsProvider –  the CredentialsProvider to use
Returns:
this/**
	 * Set the <code>credentialsProvider</code>.
	 *
	 * @param credentialsProvider
	 *            the {@link org.eclipse.jgit.transport.CredentialsProvider} to
	 *            use
	 * @return {@code this}
	 */
	public C setCredentialsProvider(
			final CredentialsProvider credentialsProvider) {
		this.credentialsProvider = credentialsProvider;
		return self();
	}

	
Set timeout.
Params:
timeout – 
           the timeout (in seconds) used for the transport step
Returns:
this/**
	 * Set <code>timeout</code>.
	 *
	 * @param timeout
	 *            the timeout (in seconds) used for the transport step
	 * @return {@code this}
	 */
	public C setTimeout(int timeout) {
		this.timeout = timeout;
		return self();
	}

	
Set the TransportConfigCallback.
Params:
transportConfigCallback –  if set, the callback will be invoked after the Transport has created, but before the Transport is used. The callback can use this opportunity to set additional type-specific configuration on the Transport instance.
Returns:
this/**
	 * Set the <code>TransportConfigCallback</code>.
	 *
	 * @param transportConfigCallback
	 *            if set, the callback will be invoked after the
	 *            {@link org.eclipse.jgit.transport.Transport} has created, but
	 *            before the {@link org.eclipse.jgit.transport.Transport} is
	 *            used. The callback can use this opportunity to set additional
	 *            type-specific configuration on the
	 *            {@link org.eclipse.jgit.transport.Transport} instance.
	 * @return {@code this}
	 */
	public C setTransportConfigCallback(
			final TransportConfigCallback transportConfigCallback) {
		this.transportConfigCallback = transportConfigCallback;
		return self();
	}

	
Return this command cast to C 
Returns:
this cast to C/**
	 * Return this command cast to {@code C}
	 *
	 * @return {@code this} cast to {@code C}
	 */
	@SuppressWarnings("unchecked")
	protected final C self() {
		return (C) this;
	}

	
Configure transport with credentials provider, timeout, and config
callback
Params:
transport –  a Transport object.
Returns:
this/**
	 * Configure transport with credentials provider, timeout, and config
	 * callback
	 *
	 * @param transport
	 *            a {@link org.eclipse.jgit.transport.Transport} object.
	 * @return {@code this}
	 */
	protected C configure(Transport transport) {
		if (credentialsProvider != null)
			transport.setCredentialsProvider(credentialsProvider);
		transport.setTimeout(timeout);
		if (transportConfigCallback != null)
			transportConfigCallback.configure(transport);
		return self();
	}

	
Configure a child command with the current configuration set in this command 
Params:
childCommand –  a TransportCommand object.
Returns:
this/**
	 * Configure a child command with the current configuration set in
	 * {@code this} command
	 *
	 * @param childCommand
	 *            a {@link org.eclipse.jgit.api.TransportCommand} object.
	 * @return {@code this}
	 */
	protected C configure(TransportCommand childCommand) {
		childCommand.setCredentialsProvider(credentialsProvider);
		childCommand.setTimeout(timeout);
		childCommand.setTransportConfigCallback(transportConfigCallback);
		return self();
	}
}