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Java example source code file (RealVectorPreservingVisitor.java)

This example Java source code file (RealVectorPreservingVisitor.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.

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realvectorpreservingvisitor

The RealVectorPreservingVisitor.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.linear;

/**
 * This interface defines a visitor for the entries of a vector. Visitors
 * implementing this interface do not alter the entries of the vector being
 * visited.
 *
 * @since 3.1
 */
public interface RealVectorPreservingVisitor {
    /**
     * Start visiting a vector. This method is called once, before any entry
     * of the vector is visited.
     *
     * @param dimension the size of the vector
     * @param start the index of the first entry to be visited
     * @param end the index of the last entry to be visited (inclusive)
     */
    void start(int dimension, int start, int end);

    /**
     * Visit one entry of the vector.
     *
     * @param index the index of the entry being visited
     * @param value the value of the entry being visited
     */
    void visit(int index, double value);

    /**
     * End visiting a vector. This method is called once, after all entries of
     * the vector have been visited.
     *
     * @return the value returned by
     * {@link RealVector#walkInDefaultOrder(RealVectorPreservingVisitor)},
     * {@link RealVector#walkInDefaultOrder(RealVectorPreservingVisitor, int, int)},
     * {@link RealVector#walkInOptimizedOrder(RealVectorPreservingVisitor)}
     * or
     * {@link RealVector#walkInOptimizedOrder(RealVectorPreservingVisitor, int, int)}
     */
    double end();
}

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