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/*
 * 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.
 */
package org.eclipse.aether.deployment;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;

import org.eclipse.aether.RepositorySystem;
import org.eclipse.aether.artifact.Artifact;
import org.eclipse.aether.metadata.Metadata;

import static java.util.Objects.requireNonNull;

/**
 * The result of deploying artifacts and their accompanying metadata into the a remote repository.
 *
 * @see RepositorySystem#deploy(org.eclipse.aether.RepositorySystemSession, DeployRequest)
 */
public final class DeployResult {

    private final DeployRequest request;

    private Collection artifacts;

    private Collection metadata;

    /**
     * Creates a new result for the specified request.
     *
     * @param request The deployment request, must not be {@code null}.
     */
    public DeployResult(DeployRequest request) {
        this.request = requireNonNull(request, "deploy request cannot be null");
        artifacts = Collections.emptyList();
        metadata = Collections.emptyList();
    }

    /**
     * Gets the deploy request that was made.
     *
     * @return The deploy request, never {@code null}.
     */
    public DeployRequest getRequest() {
        return request;
    }

    /**
     * Gets the artifacts that got deployed.
     *
     * @return The deployed artifacts, never {@code null}.
     */
    public Collection getArtifacts() {
        return artifacts;
    }

    /**
     * Sets the artifacts that got deployed.
     *
     * @param artifacts The deployed artifacts, may be {@code null}.
     * @return This result for chaining, never {@code null}.
     */
    public DeployResult setArtifacts(Collection artifacts) {
        if (artifacts == null) {
            this.artifacts = Collections.emptyList();
        } else {
            this.artifacts = artifacts;
        }
        return this;
    }

    /**
     * Adds the specified artifacts to the result.
     *
     * @param artifact The deployed artifact to add, may be {@code null}.
     * @return This result for chaining, never {@code null}.
     */
    public DeployResult addArtifact(Artifact artifact) {
        if (artifact != null) {
            if (artifacts.isEmpty()) {
                artifacts = new ArrayList<>();
            }
            artifacts.add(artifact);
        }
        return this;
    }

    /**
     * Gets the metadata that got deployed. Note that due to automatically generated metadata, there might have been
     * more metadata deployed than originally specified in the deploy request.
     *
     * @return The deployed metadata, never {@code null}.
     */
    public Collection getMetadata() {
        return metadata;
    }

    /**
     * Sets the metadata that got deployed.
     *
     * @param metadata The deployed metadata, may be {@code null}.
     * @return This result for chaining, never {@code null}.
     */
    public DeployResult setMetadata(Collection metadata) {
        if (metadata == null) {
            this.metadata = Collections.emptyList();
        } else {
            this.metadata = metadata;
        }
        return this;
    }

    /**
     * Adds the specified metadata to this result.
     *
     * @param metadata The deployed metadata to add, may be {@code null}.
     * @return This result for chaining, never {@code null}.
     */
    public DeployResult addMetadata(Metadata metadata) {
        if (metadata != null) {
            if (this.metadata.isEmpty()) {
                this.metadata = new ArrayList<>();
            }
            this.metadata.add(metadata);
        }
        return this;
    }

    @Override
    public String toString() {
        return getArtifacts() + ", " + getMetadata();
    }
}