/*

 * Copyright (c) 2014 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.

 *

 * 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package org.openjdk.bench.javax.tools;

import org.openjdk.jmh.annotations.Benchmark;

import org.openjdk.jmh.annotations.BenchmarkMode;

import org.openjdk.jmh.annotations.Mode;

import org.openjdk.jmh.annotations.OutputTimeUnit;

import org.openjdk.jmh.annotations.Scope;

import org.openjdk.jmh.annotations.Setup;

import org.openjdk.jmh.annotations.State;

import javax.tools.JavaCompiler;

import javax.tools.SimpleJavaFileObject;

import javax.tools.StandardJavaFileManager;

import javax.tools.ToolProvider;

import java.net.URI;

import java.util.ArrayList;

import java.util.List;

import java.util.concurrent.TimeUnit;

@BenchmarkMode(Mode.AverageTime)

@OutputTimeUnit(TimeUnit.MILLISECONDS)

@State(Scope.Thread)

public class Javac {

    private List<JavaSourceFromString> compilationUnits;

    private JavaCompiler compiler;

    private StandardJavaFileManager fileManager;

    @Setup

    public void prepare() {

        String helloWorld = "class Apan {   \n" + "  public static void main(String args[]) {\n"

                + "     System.out.println(\"hej apa\");\n" + "  }\n" + "}\n";

        compiler = ToolProvider.getSystemJavaCompiler();

        fileManager = compiler.getStandardFileManager(null, null, null);

        compilationUnits = new ArrayList<>();

        compilationUnits.add(new JavaSourceFromString("Apan", helloWorld));

    }

    @Benchmark

    public Boolean testCompile() throws Exception {

        JavaCompiler.CompilationTask task = compiler.getTask(null, fileManager, null, null, null, compilationUnits);

        return task.call();

    }

    private static class JavaSourceFromString extends SimpleJavaFileObject {

        final String code;

        JavaSourceFromString(String name, String code) {

            super(URI.create("string:///" + name.replace('.', '/') + Kind.SOURCE.extension),

                    Kind.SOURCE);

            this.code = code;

        }

        @Override

        public CharSequence getCharContent(boolean ignoreEncodingErrors) {

            return code;

        }

    }

}