is GZip Stream - Java File Path IO

Java examples for File Path IO:GZIP

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Description

is GZip Stream

Demo Code

/* //from   ww w. j a  v a2 s  .  co m
 * Licensed to Aduna under one or more contributor license agreements.  
 * See the NOTICE.txt file distributed with this work for additional 
 * information regarding copyright ownership. 
 *
 * Aduna licenses this file to you under the terms of the Aduna BSD 
 * License (the "License"); you may not use this file except in compliance 
 * with the License. See the LICENSE.txt file distributed with this work 
 * for the full License.
 *
 * 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.
 */
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;

public class Main{
    /**
     * GZIP header magic number bytes, like found in a gzipped files, which are
     * encoded in Intel format (i.e. little indian).
     */
    private final static byte MAGIC_NUMBER[] = { (byte) 0x1f, (byte) 0x8b };
    public static boolean isGZipStream(InputStream in) throws IOException {
        in.mark(MAGIC_NUMBER.length);
        byte[] fileHeader = IOUtil.readBytes(in, MAGIC_NUMBER.length);
        in.reset();
        return Arrays.equals(MAGIC_NUMBER, fileHeader);
    }
}

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