org.jose4j.zip.DeflateRFC1951CompressionAlgorithm Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of wildfly-client-all

This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

There is a newer version: 35.0.0.Beta1

Show newest version

/*
 * Copyright 2012-2017 Brian Campbell
 *
 * Licensed 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.jose4j.zip;

import org.jose4j.keys.KeyPersuasion;
import org.jose4j.lang.JoseException;
import org.jose4j.lang.UncheckedJoseException;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.zip.Deflater;
import java.util.zip.DeflaterOutputStream;
import java.util.zip.Inflater;
import java.util.zip.InflaterInputStream;

/**
 */
public class DeflateRFC1951CompressionAlgorithm implements CompressionAlgorithm
{
    public byte[] compress(byte[] data)
    {
        Deflater deflater = new Deflater(Deflater.DEFLATED, true);
        try (ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
             DeflaterOutputStream deflaterOutputStream = new DeflaterOutputStream(byteArrayOutputStream, deflater))
        {
            deflaterOutputStream.write(data);
            deflaterOutputStream.finish();
            return byteArrayOutputStream.toByteArray();
        }
        catch (IOException e)
        {
            throw new UncheckedJoseException("Problem compressing data.", e);
        }
        finally
        {
            deflater.end();
        }
    }

    public byte[] decompress(byte[] compressedData) throws JoseException
    {
        Inflater inflater = new Inflater(true);
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

        try (InflaterInputStream iis = new InflaterInputStream(new ByteArrayInputStream(compressedData), inflater))
        {
            int bytesRead;
            byte[] buff = new byte[256];
            while ((bytesRead = iis.read(buff)) != -1)
            {
                byteArrayOutputStream.write(buff, 0, bytesRead);
            }

            return byteArrayOutputStream.toByteArray();
        }
        catch (IOException e)
        {
            throw new JoseException("Problem decompressing data.", e);
        }
        finally
        {
            inflater.end();
        }
    }

    @Override
    public String getJavaAlgorithm()
    {
        return null;
    }


    @Override
    public String getAlgorithmIdentifier()
    {
        return CompressionAlgorithmIdentifiers.DEFLATE;
    }

    @Override
    public KeyPersuasion getKeyPersuasion()
    {
        return KeyPersuasion.NONE;
    }

    @Override
    public String getKeyType()
    {
        return null;
    }

    @Override
    public boolean isAvailable()
    {
        return true;
    }
}