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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.linear;
import org.apache.commons.math3.FieldElement;
/**
* Default implementation of the {@link FieldMatrixPreservingVisitor} interface.
*
* <p>This class is a convenience to create custom visitors without defining all methods. This class
* provides default implementations that do nothing.
*
* @param <T> the type of the field elements
* @since 2.0
*/
public class DefaultFieldMatrixPreservingVisitor<T extends FieldElement<T>>
implements FieldMatrixPreservingVisitor<T> {
/** Zero element of the field. */
private final T zero;
/**
* Build a new instance.
*
* @param zero additive identity of the field
*/
public DefaultFieldMatrixPreservingVisitor(final T zero) {
this.zero = zero;
}
/** {@inheritDoc} */
public void start(
int rows, int columns, int startRow, int endRow, int startColumn, int endColumn) {}
/** {@inheritDoc} */
public void visit(int row, int column, T value) {}
/** {@inheritDoc} */
public T end() {
return zero;
}
}
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