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Optimisation of Java Bytecode via EOLANG
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/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2016-2024 Objectionary.com
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.eolang.jeo;

import com.jcabi.log.Logger;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.stream.Stream;

/**
 * Assembler.
 * This class is used to assemble the project's EO source files to bytecode.
 * @since 0.2
 */
final class Assembler {

    /**
     * Input folder with "xmir" files.
     */
    private final Path input;

    /**
     * Output folder for the assembled classes.
     */
    private final Path output;

    /**
     * Constructor.
     * @param input Input folder with "xmir" files.
     * @param output Output folder for the assembled classes.
     */
    Assembler(final Path input, final Path output) {
        this.input = input;
        this.output = output;
    }

    /**
     * Assemble all "xmir" files.
     * @since 0.2
     */
    void assemble() {
        final String assembling = "Assembling";
        final String assembled = "assembled";
        final Stream all = new Summary(
            assembling,
            assembled,
            this.input,
            this.output,
            new ParallelTranslator(this::assemble)
        ).apply(new XmirFiles(this.input).all());
        all.forEach(this::log);
        all.close();
    }

    /**
     * Assemble a single "xmir" file.
     * @param path Path to the "xmir" file.
     * @return Path to the assembled class.
     */
    private Path assemble(final Path path) {
        final Transformation trans = new Logging(
            "Assembling",
            "assembled",
            new Caching(new Assembling(this.output, path))
        );
        trans.transform();
        return trans.target();
    }

    /**
     * Log the result.
     * @param disassembled Disassembled file.
     */
    private void log(final Path disassembled) {
        try {
            Logger.debug(
                this,
                "Assembling of '%s' (%[size]s) finished successfully.",
                disassembled,
                Files.size(disassembled)
            );
        } catch (final IOException exception) {
            throw new IllegalStateException(
                String.format("Can't get size of '%s'", disassembled),
                exception
            );
        }
    }
}