content: /* ========================================================================
   * JCommon : a free general purpose class library for the Java(tm) platform
   * ========================================================================
   *
   * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jcommon/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library 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 Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
   * in the United States and other countries.]
   *
   * -------------------------------
   * SystemPropertiesTableModel.java
   * -------------------------------
   * (C) Copyright 2000-2008, by Object Refinery Limited.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   -;
   *
   * $Id: SystemPropertiesTableModel.java,v 1.6 2008/12/18 09:57:32 mungady Exp $
   *
   * Changes (from 26-Oct-2001)
   * --------------------------
   * 26-Oct-2001 : Changed package to com.jrefinery.ui (DG);
   * 28-Feb-2001 : Changed package to com.jrefinery.ui.about (DG);
   * 15-Mar-2002 : Modified to use a ResourceBundle for elements that require
   *               localisation (DG);
   * 08-Oct-2002 : Fixed errors reported by Checkstyle (DG);
   * 18-Dec-2008 : Use ResourceBundleWrapper - see JFreeChart patch 1607918 by
   *               Jess Thrysoee (DG);
   *
   */
  
  package org.jfree.ui.about;
  
  import java.util.Collections;
  import java.util.Comparator;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Properties;
  import java.util.ResourceBundle;
  
  import org.jfree.ui.SortableTableModel;
  import org.jfree.util.ResourceBundleWrapper;
  
  /**
   * A sortable table model containing the system properties.
   *
   * @author David Gilbert
   */
  public class SystemPropertiesTableModel extends SortableTableModel {
  
      /**
       * Useful class for holding the name and value of a system property.
       *
       */
      protected static class SystemProperty {
  
          /** The property name. */
          private String name;
  
          /** The property value. */
          private String value;
  
          /**
           * Standard constructor - builds a new SystemProperty.
           *
           * @param name  the property name.
           * @param value  the property value.
           */
          public SystemProperty(final String name, final String value) {
              this.name = name;
              this.value = value;
          }
  
          /**
           * Returns the property name.
           *
           * @return the property name.
           */
          public String getName() {
              return this.name;
          }
  
          /**
           * Returns the property value.
           *
           * @return the property value.
           */
          public String getValue() {
              return this.value;
          }
  
      }
  
      /**
       * A class for comparing SystemProperty objects.
       *
       */
      protected static class SystemPropertyComparator implements Comparator {
  
          /** Indicates the sort order. */
          private boolean ascending;
  
          /**
           * Standard constructor.
           *
           * @param ascending  a flag that controls the sort order (ascending or
           *                   descending).
           */
          public SystemPropertyComparator(final boolean ascending) {
              this.ascending = ascending;
          }
  
          /**
           * Compares two objects.
           *
           * @param o1  the first object.
           * @param o2  the second object.
           *
           * @return an integer that indicates the relative order of the objects.
           */
          public int compare(final Object o1, final Object o2) {
  
              if ((o1 instanceof SystemProperty)
                      && (o2 instanceof SystemProperty)) {
                  final SystemProperty sp1 = (SystemProperty) o1;
                  final SystemProperty sp2 = (SystemProperty) o2;
                  if (this.ascending) {
                      return sp1.getName().compareTo(sp2.getName());
                  }
                  else {
                      return sp2.getName().compareTo(sp1.getName());
                  }
              }
              else {
                  return 0;
              }
  
          }
  
          /**
           * Returns <code>true</code> if this object is equal to the specified
           * object, and <code>false</code> otherwise.
           *
           * @param o  the other object.
           *
           * @return A boolean.
           */
          public boolean equals(final Object o) {
              if (this == o) {
                  return true;
              }
              if (!(o instanceof SystemPropertyComparator)) {
                  return false;
              }
  
              final SystemPropertyComparator systemPropertyComparator
                      = (SystemPropertyComparator) o;
  
              if (this.ascending != systemPropertyComparator.ascending) {
                  return false;
              }
  
              return true;
          }
  
          /**
           * Returns a hash code value for the object.
           *
           * @return the hashcode
           */
          public int hashCode() {
              return (this.ascending ? 1 : 0);
          }
      }
  
      /** Storage for the properties. */
      private List properties;
  
      /** Localised name column label. */
      private String nameColumnLabel;
  
      /** Localised property column label. */
      private String valueColumnLabel;
  
      /**
       * Creates a new table model using the properties of the current Java
       * Virtual Machine.
       */
      public SystemPropertiesTableModel() {
  
          this.properties = new java.util.ArrayList();
          try {
              final Properties p = System.getProperties();
              final Iterator iterator = p.keySet().iterator();
              while (iterator.hasNext()) {
                  final String name = (String) iterator.next();
                      final String value = System.getProperty(name);
                      final SystemProperty sp = new SystemProperty(name, value);
                      this.properties.add(sp);
              }
          }
          catch (SecurityException se) {
              // ignore SecurityExceptions
          }
  
          Collections.sort(this.properties, new SystemPropertyComparator(true));
  
          final String baseName = "org.jfree.ui.about.resources.AboutResources";
          final ResourceBundle resources = ResourceBundleWrapper.getBundle(
                  baseName);
  
          this.nameColumnLabel = resources.getString(
                  "system-properties-table.column.name");
          this.valueColumnLabel = resources.getString(
                  "system-properties-table.column.value");
  
      }
  
      /**
       * Returns true for the first column, and false otherwise - sorting is only
       * allowed on the first column.
       *
       * @param column  the column index.
       *
       * @return true for column 0, and false for all other columns.
       */
      public boolean isSortable(final int column) {
  
          if (column == 0) {
              return true;
          }
          else {
              return false;
          }
  
      }
  
      /**
       * Returns the number of rows in the table model (that is, the number of
       * system properties).
       *
       * @return the row count.
       */
      public int getRowCount() {
          return this.properties.size();
      }
  
      /**
       * Returns the number of columns in the table model.  In this case, there
       * are two columns: one for the property name, and one for the property
       * value.
       *
       * @return the column count (always 2 in this case).
       */
      public int getColumnCount() {
          return 2;
      }
  
      /**
       * Returns the name of the specified column.
       *
       * @param column  the column index.
       *
       * @return the column name.
       */
      public String getColumnName(final int column) {
  
          if (column == 0) {
              return this.nameColumnLabel;
          }
          else {
              return this.valueColumnLabel;
          }
  
      }
  
      /**
       * Returns the value at the specified row and column.  This method supports
       * the TableModel interface.
       *
       * @param row  the row index.
       * @param column  the column index.
       *
       * @return the value.
       */
      public Object getValueAt(final int row, final int column) {
  
          final SystemProperty sp = (SystemProperty) this.properties.get(row);
          if (column == 0) {
              return sp.getName();
          }
          else {
              if (column == 1) {
                  return sp.getValue();
              }
              else {
                  return null;
              }
          }
  
      }
  
      /**
       * Sorts on the specified column.
       *
       * @param column  the column index.
       * @param ascending  a flag that controls the sort order.
       *
       */
      public void sortByColumn(final int column, final boolean ascending) {
  
          if (isSortable(column)) {
              super.sortByColumn(column, ascending);
              Collections.sort(this.properties,
                      new SystemPropertyComparator(ascending));
          }
  
      }
  
  
  }
  