cern.colt.matrix.tdouble.impl.WrapperDoubleMatrix1D Maven / Gradle / Ivy

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Parallel Colt is a multithreaded version of Colt - a library for high performance scientific computing in Java. It contains efficient algorithms for data analysis, linear algebra, multi-dimensional arrays, Fourier transforms, statistics and histogramming.
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/*
Copyright (C) 1999 CERN - European Organization for Nuclear Research.
Permission to use, copy, modify, distribute and sell this software and its documentation for any purpose 
is hereby granted without fee, provided that the above copyright notice appear in all copies and 
that both that copyright notice and this permission notice appear in supporting documentation. 
CERN makes no representations about the suitability of this software for any purpose. 
It is provided "as is" without expressed or implied warranty.
 */
package cern.colt.matrix.tdouble.impl;

import cern.colt.matrix.tdouble.DoubleMatrix1D;
import cern.colt.matrix.tdouble.DoubleMatrix2D;
import cern.colt.matrix.tdouble.DoubleMatrix3D;

/**
 * 1-d matrix holding double elements; either a view wrapping another
 * matrix or a matrix whose views are wrappers.
 * 
 * @author [email protected]
 * @version 1.0, 09/24/99
 * 
 * @author Piotr Wendykier ([email protected])
 */
public class WrapperDoubleMatrix1D extends DoubleMatrix1D {
    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    /*
     * The elements of the matrix.
     */
    protected DoubleMatrix1D content;

    public WrapperDoubleMatrix1D(DoubleMatrix1D newContent) {
        if (newContent != null)
            setUp((int) newContent.size());
        this.content = newContent;
    }

    protected DoubleMatrix1D getContent() {
        return this.content;
    }

    public synchronized double getQuick(int index) {
        return content.getQuick(index);
    }

    public Object elements() {
        return content.elements();
    }

    public DoubleMatrix1D like(int size) {
        return content.like(size);
    }

    public DoubleMatrix2D like2D(int rows, int columns) {
        return content.like2D(rows, columns);
    }

    public DoubleMatrix2D reshape(int rows, int columns) {
        throw new IllegalArgumentException("This method is not supported.");
    }

    public DoubleMatrix3D reshape(int slices, int rows, int columns) {
        throw new IllegalArgumentException("This method is not supported.");
    }

    public synchronized void setQuick(int index, double value) {
        content.setQuick(index, value);
    }

    public DoubleMatrix1D viewFlip() {
        DoubleMatrix1D view = new WrapperDoubleMatrix1D(this) {
            /**
             * 
             */
            private static final long serialVersionUID = 1L;

            public synchronized double getQuick(int index) {
                return content.getQuick(size - 1 - index);
            }

            public synchronized void setQuick(int index, double value) {
                content.setQuick(size - 1 - index, value);
            }

            public synchronized double get(int index) {
                return content.get(size - 1 - index);
            }

            public synchronized void set(int index, double value) {
                content.set(size - 1 - index, value);
            }
        };
        return view;
    }

    public DoubleMatrix1D viewPart(final int index, int width) {
        checkRange(index, width);
        WrapperDoubleMatrix1D view = new WrapperDoubleMatrix1D(this) {
            /**
             * 
             */
            private static final long serialVersionUID = 1L;

            public synchronized double getQuick(int i) {
                return content.getQuick(index + i);
            }

            public synchronized void setQuick(int i, double value) {
                content.setQuick(index + i, value);
            }

            public synchronized double get(int i) {
                return content.get(index + i);
            }

            public synchronized void set(int i, double value) {
                content.set(index + i, value);
            }
        };
        view.size = width;
        return view;
    }

    public DoubleMatrix1D viewSelection(int[] indexes) {
        // check for "all"
        if (indexes == null) {
            indexes = new int[size];
            for (int i = size; --i >= 0;)
                indexes[i] = i;
        }

        checkIndexes(indexes);
        final int[] idx = indexes;

        WrapperDoubleMatrix1D view = new WrapperDoubleMatrix1D(this) {
            /**
             * 
             */
            private static final long serialVersionUID = 1L;

            public synchronized double getQuick(int i) {
                return content.getQuick(idx[i]);
            }

            public synchronized void setQuick(int i, double value) {
                content.setQuick(idx[i], value);
            }

            public synchronized double get(int i) {
                return content.get(idx[i]);
            }

            public synchronized void set(int i, double value) {
                content.set(idx[i], value);
            }
        };
        view.size = indexes.length;
        return view;
    }

    protected DoubleMatrix1D viewSelectionLike(int[] offsets) {
        throw new InternalError(); // should never get called
    }

    public DoubleMatrix1D viewStrides(final int _stride) {
        if (stride <= 0)
            throw new IndexOutOfBoundsException("illegal stride: " + stride);
        WrapperDoubleMatrix1D view = new WrapperDoubleMatrix1D(this) {
            /**
             * 
             */
            private static final long serialVersionUID = 1L;

            public synchronized double getQuick(int index) {
                return content.getQuick(index * _stride);
            }

            public synchronized void setQuick(int index, double value) {
                content.setQuick(index * _stride, value);
            }

            public synchronized double get(int index) {
                return content.get(index * _stride);
            }

            public synchronized void set(int index, double value) {
                content.set(index * _stride, value);
            }
        };
        if (size != 0)
            view.size = (size - 1) / _stride + 1;
        return view;
    }
}