net.minecraftforge.gradle.tasks.fernflower.ByteCodeProvider Maven / Gradle / Ivy

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/*
 * A Gradle plugin for the creation of Minecraft mods and MinecraftForge plugins.
 * Copyright (C) 2013-2019 Minecraft Forge
 * Copyright (C) 2020-2021 anatawa12 and other contributors
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
 * USA
 */
package net.minecraftforge.gradle.tasks.fernflower;

import org.jetbrains.java.decompiler.main.extern.IBytecodeProvider;
import org.jetbrains.java.decompiler.util.InterpreterUtil;

import java.io.File;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

class ByteCodeProvider implements IBytecodeProvider {
    @Override
    public byte[] getBytecode(String externalPath, String internalPath) throws IOException {
        File file = new File(externalPath);
        if (internalPath == null) {
            return InterpreterUtil.getBytes(file);
        } else {
            try (ZipFile archive = new ZipFile(file)) {
                ZipEntry entry = archive.getEntry(internalPath);
                if (entry == null) {
                    throw new IOException("Entry not found: " + internalPath);
                }
                return InterpreterUtil.getBytes(archive, entry);
            }
        }
    }
}