/*******************************************************************************
 * Copyright (c) 2012 Sonatype, Inc.
 * 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:
 *    Sonatype, Inc. - initial API and implementation
 *******************************************************************************/
package org.eclipse.aether.resolution;

import org.eclipse.aether.repository.RemoteRepository;

/**
 * A query for the resolution error policy for a given artifact/metadata.
 * 
 * @param <T> The type of the affected repository item (artifact or metadata).
 * @see ResolutionErrorPolicy
 */
public final class ResolutionErrorPolicyRequest<T>
{

    private T item;

    private RemoteRepository repository;

    /**
     * Creates an uninitialized request.
     */
    public ResolutionErrorPolicyRequest()
    {
        // enables default constructor
    }

    /**
     * Creates a request for the specified artifact/metadata and remote repository.
     * 
     * @param item The artifact/metadata for which to determine the error policy, may be {@code null}.
     * @param repository The repository from which the resolution is attempted, may be {@code null}.
     */
    public ResolutionErrorPolicyRequest( T item, RemoteRepository repository )
    {
        setItem( item );
        setRepository( repository );
    }

    /**
     * Gets the artifact/metadata for which to determine the error policy.
     * 
     * @return The artifact/metadata for which to determine the error policy or {@code null} if not set.
     */
    public T getItem()
    {
        return item;
    }

    /**
     * Sets the artifact/metadata for which to determine the error policy.
     * 
     * @param item The artifact/metadata for which to determine the error policy, may be {@code null}.
     * @return This request for chaining, never {@code null}.
     */
    public ResolutionErrorPolicyRequest<T> setItem( T item )
    {
        this.item = item;
        return this;
    }

    /**
     * Gets the remote repository from which the resolution of the artifact/metadata is attempted.
     * 
     * @return The involved remote repository or {@code null} if not set.
     */
    public RemoteRepository getRepository()
    {
        return repository;
    }

    /**
     * Sets the remote repository from which the resolution of the artifact/metadata is attempted.
     * 
     * @param repository The repository from which the resolution is attempted, may be {@code null}.
     * @return This request for chaining, never {@code null}.
     */
    public ResolutionErrorPolicyRequest<T> setRepository( RemoteRepository repository )
    {
        this.repository = repository;
        return this;
    }

    @Override
    public String toString()
    {
        return getItem() + " < " + getRepository();
    }

}