/*
 * 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.apache.sling.commons.content.processing;

import java.io.InputStream;
import java.io.OutputStream;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.function.Supplier;

import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.osgi.annotation.versioning.ProviderType;

/**
 * Service for processing content.
 */
@ProviderType
public interface ContentProcessor {

    /**
     * Processes the given content.
     *
     * @param input      the supplier of the stream from which the content is read for processing
     * @param output     the supplier of the stream into which the content is written during or after processing
     * @param parameters the parameters for the processing operation
     * @param report     the report to which the findings of the processing operation are added
     * @return {@link java.util.concurrent.CompletableFuture} for signaling completion
     */
    public abstract @NotNull CompletableFuture<Void> process(@NotNull final Supplier<InputStream> input, @NotNull final Supplier<OutputStream> output, @Nullable final Map<String, Object> parameters, @NotNull final Map<String, Object> report);

}