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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).

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/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project 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:
 *
 *   https://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 io.netty.handler.codec.compression;

import io.netty.util.internal.PlatformDependent;
import io.netty.util.internal.SystemPropertyUtil;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;

/**
 * Creates a new {@link ZlibEncoder} and a new {@link ZlibDecoder}.
 */
public final class ZlibCodecFactory {
    private static final InternalLogger logger = InternalLoggerFactory.getInstance(ZlibCodecFactory.class);

    private static final int DEFAULT_JDK_WINDOW_SIZE = 15;
    private static final int DEFAULT_JDK_MEM_LEVEL = 8;

    private static final boolean noJdkZlibDecoder;
    private static final boolean noJdkZlibEncoder;
    private static final boolean supportsWindowSizeAndMemLevel;

    static {
        noJdkZlibDecoder = SystemPropertyUtil.getBoolean("io.netty.noJdkZlibDecoder",
                PlatformDependent.javaVersion() < 7);
        logger.debug("-Dio.netty.noJdkZlibDecoder: {}", noJdkZlibDecoder);

        noJdkZlibEncoder = SystemPropertyUtil.getBoolean("io.netty.noJdkZlibEncoder", false);
        logger.debug("-Dio.netty.noJdkZlibEncoder: {}", noJdkZlibEncoder);

        supportsWindowSizeAndMemLevel = noJdkZlibDecoder || PlatformDependent.javaVersion() >= 7;
    }

    /**
     * Returns {@code true} if specify a custom window size and mem level is supported.
     */
    public static boolean isSupportingWindowSizeAndMemLevel() {
        return supportsWindowSizeAndMemLevel;
    }

    public static ZlibEncoder newZlibEncoder(int compressionLevel) {
        if (PlatformDependent.javaVersion() < 7 || noJdkZlibEncoder) {
            return new JZlibEncoder(compressionLevel);
        } else {
            return new JdkZlibEncoder(compressionLevel);
        }
    }

    public static ZlibEncoder newZlibEncoder(ZlibWrapper wrapper) {
        if (PlatformDependent.javaVersion() < 7 || noJdkZlibEncoder) {
            return new JZlibEncoder(wrapper);
        } else {
            return new JdkZlibEncoder(wrapper);
        }
    }

    public static ZlibEncoder newZlibEncoder(ZlibWrapper wrapper, int compressionLevel) {
        if (PlatformDependent.javaVersion() < 7 || noJdkZlibEncoder) {
            return new JZlibEncoder(wrapper, compressionLevel);
        } else {
            return new JdkZlibEncoder(wrapper, compressionLevel);
        }
    }

    public static ZlibEncoder newZlibEncoder(ZlibWrapper wrapper, int compressionLevel, int windowBits, int memLevel) {
        if (PlatformDependent.javaVersion() < 7 || noJdkZlibEncoder ||
                windowBits != DEFAULT_JDK_WINDOW_SIZE || memLevel != DEFAULT_JDK_MEM_LEVEL) {
            return new JZlibEncoder(wrapper, compressionLevel, windowBits, memLevel);
        } else {
            return new JdkZlibEncoder(wrapper, compressionLevel);
        }
    }

    public static ZlibEncoder newZlibEncoder(byte[] dictionary) {
        if (PlatformDependent.javaVersion() < 7 || noJdkZlibEncoder) {
            return new JZlibEncoder(dictionary);
        } else {
            return new JdkZlibEncoder(dictionary);
        }
    }

    public static ZlibEncoder newZlibEncoder(int compressionLevel, byte[] dictionary) {
        if (PlatformDependent.javaVersion() < 7 || noJdkZlibEncoder) {
            return new JZlibEncoder(compressionLevel, dictionary);
        } else {
            return new JdkZlibEncoder(compressionLevel, dictionary);
        }
    }

    public static ZlibEncoder newZlibEncoder(int compressionLevel, int windowBits, int memLevel, byte[] dictionary) {
        if (PlatformDependent.javaVersion() < 7 || noJdkZlibEncoder ||
                windowBits != DEFAULT_JDK_WINDOW_SIZE || memLevel != DEFAULT_JDK_MEM_LEVEL) {
            return new JZlibEncoder(compressionLevel, windowBits, memLevel, dictionary);
        } else {
            return new JdkZlibEncoder(compressionLevel, dictionary);
        }
    }

    public static ZlibDecoder newZlibDecoder() {
        if (PlatformDependent.javaVersion() < 7 || noJdkZlibDecoder) {
            return new JZlibDecoder();
        } else {
            return new JdkZlibDecoder(true);
        }
    }

    public static ZlibDecoder newZlibDecoder(ZlibWrapper wrapper) {
        if (PlatformDependent.javaVersion() < 7 || noJdkZlibDecoder) {
            return new JZlibDecoder(wrapper);
        } else {
            return new JdkZlibDecoder(wrapper, true);
        }
    }

    public static ZlibDecoder newZlibDecoder(byte[] dictionary) {
        if (PlatformDependent.javaVersion() < 7 || noJdkZlibDecoder) {
            return new JZlibDecoder(dictionary);
        } else {
            return new JdkZlibDecoder(dictionary);
        }
    }

    private ZlibCodecFactory() {
        // Unused
    }
}