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/*
 * Copyright 2019 and onwards Makoto Yui
 *
 * Licensed 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 matrix4j.matrix;

import matrix4j.vector.Vector;
import matrix4j.vector.VectorProcedure;

import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;

public abstract class RowMajorMatrix extends AbstractMatrix {

    public RowMajorMatrix() {
        super();
    }

    @Override
    public boolean isRowMajorMatrix() {
        return true;
    }

    @Override
    public boolean isColumnMajorMatrix() {
        return false;
    }

    @Override
    public void getRow(@Nonnegative final int index, @Nonnull final Vector row) {
        row.clear();
        eachNonNullInRow(index, new VectorProcedure() {
            @Override
            public void apply(final int i, final double value) {
                row.set(i, value);
            }
        });
    }

    @Override
    public void eachInColumn(int col, VectorProcedure procedure, boolean nullOutput) {
        throw new UnsupportedOperationException();
    }

    @Override
    public void eachNonZeroInColumn(int col, VectorProcedure procedure) {
        throw new UnsupportedOperationException();
    }

    @Override
    public RowMajorMatrix toRowMajorMatrix() {
        return this;
    }

}