ignite-tc-helper-web/src/main/java/org/apache/ignite/ci/util/ZipUtil.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.ignite.ci.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.nio.file.Files;
import java.nio.file.StandardCopyOption;
import java.util.ArrayList;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import org.apache.ignite.ci.HelperConfig;

/** Unzips files to specified folder */
public class ZipUtil {

    public static List<File> unZipToSameFolder(File zipFile) {
        return unZip(zipFile, zipFile.getParentFile());
    }

    public static List<File> unZip(File zipFile, File outputFolder) {
        List<File> result = new ArrayList<>();
        try {
            //get the zip file content
            try (ZipInputStream zis =
                     new ZipInputStream(new FileInputStream(zipFile))){
                //get the zipped file list entry
                ZipEntry ze = zis.getNextEntry();

                while (ze != null) {
                    String fileName = ze.getName();
                    File newFile = new File(outputFolder + File.separator + fileName);
                    if(newFile.exists() && newFile.canRead())
                        System.out.println("file unzip skipped (file already exist): " + newFile.getAbsoluteFile());
                    else {
                        System.out.println("file unzip : " + newFile.getAbsoluteFile());

                        HelperConfig.ensureDirExist(new File(newFile.getParent()));
                        Files.copy(zis, newFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
                    }
                    result.add(newFile);
                    ze = zis.getNextEntry();
                }
                zis.closeEntry();
            }  
            return result;
        }
        catch (IOException e) {
            throw new UncheckedIOException(e);
        }

    }
}