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

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

import java.util.ArrayList;

// TODO: Auto-generated Javadoc
//Must be initialized!
/**
 * The Class DynamicTriangleMatrix.
 */
public class DynamicTriangleMatrix implements ITriangleMatrix {

        /** The matrix. */
        private final ArrayList<Float> matrix;
        
        /** The size. */
        protected int size;
        
        /** The initalization value. */
        private float initalizationValue;

        /**
         * Instantiates a new dynamic triangle matrix.
         *
         * @param size the size
         */
        public DynamicTriangleMatrix(int size) {
                this.size = size;
                matrix = new ArrayList<Float>();
                matrix.ensureCapacity(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.get((row * size)
                                - (((row * (row + 1)) / 2) - (size - col)));

        }

        // Increases the size
        /*
         * (non-Javadoc)
         * 
         * @see
         * de.ugoe.cs.autoquest.tasktrees.alignment.matrix.ITriangleMatrix#increaseSize
         * (int)
         */
        @Override
        public void increaseSize(int count) {
                final int oldsize = size;
                this.size += count;
                matrix.ensureCapacity(size * (size + (1 / 2)));
                for (int i = 0; i < ((oldsize * count) + ((count * (count + 1)) / 2)); i++) {
                        matrix.add(this.initalizationValue);
                }
        }

        /*
         * (non-Javadoc)
         * 
         * @see
         * de.ugoe.cs.autoquest.tasktrees.alignment.matrix.ITriangleMatrix#initialize
         * (float)
         */
        @Override
        public void initialize(float value) {
                this.initalizationValue = value;
                matrix.clear();
                for (int i = 0; i < ((this.size * (this.size + 1)) / 2); i++) {
                        matrix.add(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.set((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
         * de.ugoe.cs.autoquest.tasktrees.alignment.matrix.ITriangleMatrix#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;
        }
}