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Diffstat (limited to 'src/main/java/org/apache/commons/math/linear/DefaultFieldMatrixChangingVisitor.java')
-rw-r--r-- | src/main/java/org/apache/commons/math/linear/DefaultFieldMatrixChangingVisitor.java | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/src/main/java/org/apache/commons/math/linear/DefaultFieldMatrixChangingVisitor.java b/src/main/java/org/apache/commons/math/linear/DefaultFieldMatrixChangingVisitor.java new file mode 100644 index 0000000..808b00d --- /dev/null +++ b/src/main/java/org/apache/commons/math/linear/DefaultFieldMatrixChangingVisitor.java @@ -0,0 +1,62 @@ +/* + * 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.math.linear; + +import org.apache.commons.math.FieldElement; +import org.apache.commons.math.linear.MatrixVisitorException; + +/** + * Default implementation of the {@link FieldMatrixChangingVisitor} interface. + * <p> + * This class is a convenience to create custom visitors without defining all + * methods. This class provides default implementations that do nothing. + * </p> + * + * @param <T> the type of the field elements + * @version $Revision: 1073158 $ $Date: 2011-02-21 22:46:52 +0100 (lun. 21 févr. 2011) $ + * @since 2.0 + */ +public class DefaultFieldMatrixChangingVisitor<T extends FieldElement<T>> + implements FieldMatrixChangingVisitor<T> { + + /** Zero element of the field. */ + private final T zero; + + /** Build a new instance. + * @param zero additive identity of the field + */ + public DefaultFieldMatrixChangingVisitor(final T zero) { + this.zero = zero; + } + + /** {@inheritDoc} */ + public void start(int rows, int columns, + int startRow, int endRow, int startColumn, int endColumn) { + } + + /** {@inheritDoc} */ + public T visit(int row, int column, T value) throws MatrixVisitorException { + return value; + } + + /** {@inheritDoc} */ + public T end() { + return zero; + } + +} |