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A Java's Collaborative Filtering library to carry out experiments in research of Collaborative Filtering based Recommender Systems. The library has been designed from researchers to researchers.

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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
 *
 *      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.apache.commons.math3.exception;

import org.apache.commons.math3.exception.util.Localizable;
import org.apache.commons.math3.exception.util.LocalizedFormats;

/**
 * Exception triggered when something that shouldn't happen does happen.
 *
 * @since 2.2
 */
public class MathInternalError extends MathIllegalStateException {
    /** Serializable version Id. */
    private static final long serialVersionUID = -6276776513966934846L;
    /** URL for reporting problems. */
    private static final String REPORT_URL = "https://issues.apache.org/jira/browse/MATH";

    /**
     * Simple constructor.
     */
    public MathInternalError() {
        getContext().addMessage(LocalizedFormats.INTERNAL_ERROR, REPORT_URL);
    }

    /**
     * Simple constructor.
     * @param cause root cause
     */
    public MathInternalError(final Throwable cause) {
        super(cause, LocalizedFormats.INTERNAL_ERROR, REPORT_URL);
    }

    /**
     * Constructor accepting a localized message.
     *
     * @param pattern Message pattern explaining the cause of the error.
     * @param args Arguments.
     */
    public MathInternalError(Localizable pattern, Object ... args) {
        super(pattern, args);
    }
}