mailbox/api/src/main/java/org/apache/james/mailbox/extractor/TextExtractor.java

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package org.apache.james.mailbox.extractor;

import java.io.InputStream;

import org.apache.james.mailbox.model.ContentType;

import com.github.fge.lambdas.Throwing;

import reactor.core.publisher.Mono;
import reactor.core.scheduler.Schedulers;

public interface TextExtractor {
    default boolean applicable(ContentType contentType) {
        return true;
    }

    /**
     * This method will close the InputStream argument.
     */
    ParsedContent extractContent(InputStream inputStream, ContentType contentType) throws Exception;

    /**
     * This method will close the InputStream argument.
     */
    default Mono<ParsedContent> extractContentReactive(InputStream inputStream, ContentType contentType) {
        return Mono.using(() -> inputStream,
                stream -> Mono.fromCallable(() -> extractContent(stream, contentType)).subscribeOn(Schedulers.boundedElastic()),
                Throwing.consumer(InputStream::close).orDoNothing());
    }

}