/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2011 by Rapid-I and the contributors
 *
 *  Complete list of developers available at our web site:
 *
 *       http://rapid-i.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see http://www.gnu.org/licenses/.
 */
package com.rapidminer.gui.renderer.models;

import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableModel;

import com.rapidminer.example.Attribute;
import com.rapidminer.example.Attributes;
import com.rapidminer.gui.renderer.AbstractTableModelTableRenderer;
import com.rapidminer.operator.IOContainer;
import com.rapidminer.operator.features.transformation.SVDModel;
import com.rapidminer.tools.Tools;

/**
 * This is a renderer for showing a table of the Singular Value Vectors.
 * 
 * @author Sebastian Land
 */
public class SVDModelVectorRenderer extends AbstractTableModelTableRenderer {

    /**
     * Wrapper class for wraping a {@link SVDModel} into a {@link TableModel}.
     *
     * @author Sebastian Land
     */
    private class SVDVectorTableModel extends AbstractTableModel {
        private static final long serialVersionUID = -9026248524043239399L;

        private String[] attributeNames;

        private SVDModel model;

        private int numberOfComponents;

        public SVDVectorTableModel(SVDModel model) {
            Attributes attributes = model.getTrainingHeader().getAttributes();
            attributeNames = new String[attributes.size()];
            int i = 0;
            for (Attribute attribute: attributes) {
                attributeNames[i] = attribute.getName();
                i++;
            }
            this.numberOfComponents = model.getNumberOfComponents();

            this.model = model;
        }

        @Override
        public int getColumnCount() {
            return numberOfComponents;
        }

        @Override
        public int getRowCount() {
            return attributeNames.length;
        }

        @Override
        public Object getValueAt(int rowIndex, int columnIndex) {
            if (columnIndex == 0) {
                return attributeNames[rowIndex];
            } else {
                return Tools.formatNumber(model.getSingularVectorValue(columnIndex - 1, rowIndex));
            }
        }

        @Override
        public String getColumnName(int column) {
            if (column == 0) {
                return "Attribute";
            } else {
                return "SVD Vector " + column;
            }
        }
    }

    @Override
    public String getName() {
        return "SVD Vectors";
    }

    @Override
    public TableModel getTableModel(Object renderable, IOContainer ioContainer, boolean isReporting) {
        SVDModel model = (SVDModel) renderable;
        return new SVDVectorTableModel(model);
    }
}