source: branches/autoquest-core-tasktrees-alignment/src/main/java/de/ugoe/cs/autoquest/tasktrees/alignment/matrix/StaticTriangleMatrix.java

/*
 * 
 */
package de.ugoe.cs.autoquest.tasktrees.alignment.matrix;

import java.io.Serializable;

// TODO: Auto-generated Javadoc
/**
 * The Class StaticTriangleMatrix.
 */
public class StaticTriangleMatrix implements ITriangleMatrix, Serializable {

        /** The Constant serialVersionUID. */
        private static final long serialVersionUID = 7599542322424894866L;
        
        /** The matrix. */
        private final float[] matrix;
        
        /** The size. */
        protected int size;

        /**
         * Instantiates a new static triangle matrix.
         *
         * @param size the size
         */
        public StaticTriangleMatrix(int size) {
                this.size = size;
                matrix = new float[(size * (size + 1)) / 2];
        }

        /* (non-Javadoc)
         * @see de.ugoe.cs.autoquest.tasktrees.alignment.matrix.ITriangleMatrix#get(int, int)
         */
        @Override
        public float get(int first, int second) {
                final int row = Math.min(first, second);
                final int col = Math.max(first, second);
                return matrix[(row * size) - (((row * (row + 1)) / 2) - (size - col))];

        }

        /* (non-Javadoc)
         * @see de.ugoe.cs.autoquest.tasktrees.alignment.matrix.ITriangleMatrix#increaseSize(int)
         */
        @Override
        public void increaseSize(int count) throws Exception {
                throw new Exception(
                                "Cannot call this function on this implementation of ITriangle Matrix");

        }

        /* (non-Javadoc)
         * @see de.ugoe.cs.autoquest.tasktrees.alignment.matrix.ITriangleMatrix#initialize(float)
         */
        @Override
        public void initialize(float value) {
                for (int i = 0; i < matrix.length; i++) {
                        matrix[i] = value;
                }
        }

        /* (non-Javadoc)
         * @see de.ugoe.cs.autoquest.tasktrees.alignment.matrix.ITriangleMatrix#set(int, int, float)
         */
        @Override
        public void set(int first, int second, float value) {
                final int row = Math.min(first, second);
                final int col = Math.max(first, second);
                matrix[(row * size) - (((row * (row + 1)) / 2) - (size - col))] = value;
        }

        /* (non-Javadoc)
         * @see de.ugoe.cs.autoquest.tasktrees.alignment.matrix.ITriangleMatrix#size()
         */
        @Override
        public int size() {
                return size;
        }

        /* (non-Javadoc)
         * @see java.lang.Object#toString()
         */
        @Override
        public String toString() {
                String result = "";
                for (int i = 0; i < size; i++) {
                        for (int j = 0; j < size; j++) {
                                if (i < j) {
                                        if (Float.isInfinite(this.get(i, j))) {
                                                result = result + " -------";
                                        } else {
                                                result = result
                                                                + String.format("%+8.2f", this.get(i, j));
                                        }
                                } else {
                                        result = result + ("        ");
                                }
                        }
                        result = result + "\n";
                }
                return result;
        }
}