OpenCvLoader.java

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/*
 * Autopsy Forensic Browser
 *
 * Copyright 2018 Basis Technology Corp.
 * Contact: carrier <at> sleuthkit <dot> org
 *
 * 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.sleuthkit.autopsy.corelibs;

import org.opencv.core.Core;

public final class OpenCvLoader {

    private static final boolean OPEN_CV_LOADED;
    private static UnsatisfiedLinkError exception = null;

    static {
        boolean tempOpenCvLoaded = false;
        try {
            System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
            tempOpenCvLoaded = true;
        } catch (UnsatisfiedLinkError e) {
            tempOpenCvLoaded = false;
            exception = e;  //save relevant error for throwing at appropriate time
        }
        OPEN_CV_LOADED = tempOpenCvLoaded;
    }

    public static boolean isOpenCvLoaded() throws UnsatisfiedLinkError {
        if (!OPEN_CV_LOADED) {
             //exception should never be null if the open cv isn't loaded but just in case
            if (exception != null) {
                throw exception;
            } else {
                throw new UnsatisfiedLinkError("OpenCV native library failed to load");
            }

        }
        return OPEN_CV_LOADED;
    }
}