src/main/java/com/android/tools/build/apkzlib/zip/CompressionMethod.java

/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * 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 com.android.tools.build.apkzlib.zip;

import javax.annotation.Nullable;

/**
 * Enumeration with all known compression methods.
 */
public enum CompressionMethod {
    /**
     * STORE method: data is stored without any compression.
     */
    STORE(0),

    /**
     * DEFLATE method: data is stored compressed using the DEFLATE algorithm.
     */
    DEFLATE(8);

    /**
     * Code, within the zip file, that identifies this compression method.
     */
    int methodCode;

    /**
     * Creates a new compression method.
     *
     * @param methodCode the code used in the zip file that identifies the compression method
     */
    CompressionMethod(int methodCode) {
        this.methodCode = methodCode;
    }

    /**
     * Obtains the compression method that corresponds to the provided code.
     *
     * @param code the code
     * @return the method or {@code null} if no method has the provided code
     */
    @Nullable
    static CompressionMethod fromCode(long code) {
        for (CompressionMethod method : values()) {
            if (method.methodCode == code) {
                return method;
            }
        }

        return null;
    }
}