/*
 * Copyright (c) 2014, 2022, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */

package javacserver.comp;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.stream.Stream;

import com.sun.tools.javac.Main;

import javacserver.Log;
import javacserver.Result;
import javacserver.Util;
import javacserver.options.Option;
import javacserver.server.Sjavac;

/**
 * The sjavac implementation that interacts with javac and performs the actual
 * compilation.
 *
 *  <p><b>This is NOT part of any supported API.
 *  If you write code that depends on this, you do so at your own risk.
 *  This code and its internal interfaces are subject to change or
 *  deletion without notice.</b>
 */
public class SjavacImpl implements Sjavac {

    @Override
    @SuppressWarnings("deprecated")
    public Result compile(String[] args) {
        // Direct logging to our byte array stream.
        StringWriter strWriter = new StringWriter();
        PrintWriter printWriter = new PrintWriter(strWriter);

        // Prepare arguments
        String[] passThroughArgs = Stream.of(args)
                                         .filter(arg -> !arg.startsWith(Option.SERVER.arg))
                                         .toArray(String[]::new);
        // Compile
        int exitcode = Main.compile(passThroughArgs, printWriter);
        Result result = Result.of(exitcode);

        // Process compiler output (which is always errors)
        printWriter.flush();
        Util.getLines(strWriter.toString()).forEach(Log::error);

        return result;

    }

    @Override
    public void shutdown() {
        // Nothing to clean up
    }
}