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Java example source code file (NonMonotonicSequenceException.java)

This example Java source code file (NonMonotonicSequenceException.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

mathillegalnumberexception, nonmonotonicsequenceexception, number

The NonMonotonicSequenceException.java Java example source code

/*
 * 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.util.MathArrays;
import org.apache.commons.math3.exception.util.LocalizedFormats;

/**
 * Exception to be thrown when the a sequence of values is not monotonically
 * increasing or decreasing.
 *
 * @since 2.2 (name changed to "NonMonotonicSequenceException" in 3.0)
 */
public class NonMonotonicSequenceException extends MathIllegalNumberException {
    /** Serializable version Id. */
    private static final long serialVersionUID = 3596849179428944575L;
    /**
     * Direction (positive for increasing, negative for decreasing).
     */
    private final MathArrays.OrderDirection direction;
    /**
     * Whether the sequence must be strictly increasing or decreasing.
     */
    private final boolean strict;
    /**
     * Index of the wrong value.
     */
    private final int index;
    /**
     * Previous value.
     */
    private final Number previous;

    /**
     * Construct the exception.
     * This constructor uses default values assuming that the sequence should
     * have been strictly increasing.
     *
     * @param wrong Value that did not match the requirements.
     * @param previous Previous value in the sequence.
     * @param index Index of the value that did not match the requirements.
     */
    public NonMonotonicSequenceException(Number wrong,
                                         Number previous,
                                         int index) {
        this(wrong, previous, index, MathArrays.OrderDirection.INCREASING, true);
    }

    /**
     * Construct the exception.
     *
     * @param wrong Value that did not match the requirements.
     * @param previous Previous value in the sequence.
     * @param index Index of the value that did not match the requirements.
     * @param direction Strictly positive for a sequence required to be
     * increasing, negative (or zero) for a decreasing sequence.
     * @param strict Whether the sequence must be strictly increasing or
     * decreasing.
     */
    public NonMonotonicSequenceException(Number wrong,
                                         Number previous,
                                         int index,
                                         MathArrays.OrderDirection direction,
                                         boolean strict) {
        super(direction == MathArrays.OrderDirection.INCREASING ?
              (strict ?
               LocalizedFormats.NOT_STRICTLY_INCREASING_SEQUENCE :
               LocalizedFormats.NOT_INCREASING_SEQUENCE) :
              (strict ?
               LocalizedFormats.NOT_STRICTLY_DECREASING_SEQUENCE :
               LocalizedFormats.NOT_DECREASING_SEQUENCE),
              wrong, previous, Integer.valueOf(index), Integer.valueOf(index - 1));

        this.direction = direction;
        this.strict = strict;
        this.index = index;
        this.previous = previous;
    }

    /**
     * @return the order direction.
     **/
    public MathArrays.OrderDirection getDirection() {
        return direction;
    }
    /**
     * @return {@code true} is the sequence should be strictly monotonic.
     **/
    public boolean getStrict() {
        return strict;
    }
    /**
     * Get the index of the wrong value.
     *
     * @return the current index.
     */
    public int getIndex() {
        return index;
    }
    /**
     * @return the previous value.
     */
    public Number getPrevious() {
        return previous;
    }
}

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