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package org.eclipse.aether.repository;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

import java.io.File;
import static java.util.Objects.requireNonNull;

import org.eclipse.aether.RepositorySystemSession;

/**
 * A result from the local repository about the existence of metadata.
 *
 * @see LocalRepositoryManager#find(RepositorySystemSession, LocalMetadataRequest)
 */
public final class LocalMetadataResult
{

    private final LocalMetadataRequest request;

    private File file;

    private boolean stale;

    /**
     * Creates a new result for the specified request.
     *
     * @param request The local metadata request, must not be {@code null}.
     */
    public LocalMetadataResult( LocalMetadataRequest request )
    {
        this.request = requireNonNull( request, "local metadata request cannot be null" );
    }

    /**
     * Gets the request corresponding to this result.
     *
     * @return The corresponding request, never {@code null}.
     */
    public LocalMetadataRequest getRequest()
    {
        return request;
    }

    /**
     * Gets the file to the requested metadata if the metadata is available in the local repository.
     * 
     * @return The file to the requested metadata or {@code null}.
     */
    public File getFile()
    {
        return file;
    }

    /**
     * Sets the file to requested metadata.
     * 
     * @param file The metadata file, may be {@code null}.
     * @return This result for chaining, never {@code null}.
     */
    public LocalMetadataResult setFile( File file )
    {
        this.file = file;
        return this;
    }

    /**
     * This value indicates whether the metadata is stale and should be updated.
     * 
     * @return {@code true} if the metadata is stale and should be updated, {@code false} otherwise.
     */
    public boolean isStale()
    {
        return stale;
    }

    /**
     * Sets whether the metadata is stale.
     * 
     * @param stale {@code true} if the metadata is stale and should be updated, {@code false} otherwise.
     * @return This result for chaining, never {@code null}.
     */
    public LocalMetadataResult setStale( boolean stale )
    {
        this.stale = stale;
        return this;
    }

    @Override
    public String toString()
    {
        return request.toString() + "(" + getFile() + ")";
    }

}