tablerelationsmodel.java

一个OR Mapping 工具

package org.dbgen.view;

import javax.swing.*;
import javax.swing.table.*;
import org.dbgen.*;
import org.dbgen.event.*;

/**
 * This class was generated by a SmartGuide.
 *
 */
public class TableRelationsModel extends DefaultTableModel implements RelationChangedListener {

  static final int COL_MASTER_KEY = 0;
  static final int COL_FOREIGN_TABLE = 1;
  static final int COL_FOREIGN_KEY = 2;

  Table fieldTable = null;
  protected transient java.beans.PropertyChangeSupport propertyChange = new java.beans.PropertyChangeSupport(this);
  protected final static String[] columns = { "Master Key", "Foreign Table", "Foreign Key" };

  /**
   * TableFieldsModel constructor comment.
   */
  public TableRelationsModel() {
    super();
  }

  /**
   * This method was created by a SmartGuide.
   * @param table org.dbgen.Table
   */
  public TableRelationsModel(Table table) {
    super();
    setTable(table);
  }

  /**
   * The addPropertyChangeListener method was generated to support the propertyChange field.
   */
  public synchronized void addPropertyChangeListener(java.beans.PropertyChangeListener listener) {
    propertyChange.addPropertyChangeListener(listener);
  }

  /**
   * The firePropertyChange method was generated to support the propertyChange field.
   */
  public void firePropertyChange(String propertyName, Object oldValue, Object newValue) {
    propertyChange.firePropertyChange(propertyName, oldValue, newValue);
  }

  /**
   * This method was created by a SmartGuide.
   * @return java.lang.Class
   * @param col int
   */
  public Class getColumnClass(int col) {
    Object obj = getValueAt(0, col);

    if ( obj != null )
      return getValueAt(0, col).getClass();
    else
      return String.class;
  }

  /**
   * getColumnCount method comment.
   */
  public int getColumnCount() {
    return columns.length;
  }

  /**
   * This method was created by a SmartGuide.
   * @return java.lang.String
   * @param col int
   */
  public String getColumnName(int col) {
    return columns[col];
  }

  /**
   * getRowCount method comment.
   */
  public int getRowCount() {
    return getTable().getRelations().size();
  }

  /**
   * Gets the table property (org.dbgen.Table) value.
   * @return The table property value.
   * @see #setTable
   */
  public Table getTable() {
    /* Returns the table property value. */
    if (fieldTable == null) {
      try {
        fieldTable = new Table();
      } catch (Throwable exception) {
        System.err.println("Exception creating table property.");
      }
    };

    return fieldTable;
  }

  /**
   * getValueAt method comment.
   * XXX - make N/A fields for non-length or non-scale field cases.
   */
  public Object getValueAt(int row, int col) {
    Relation relation = (Relation) getTable().getRelations().elementAt(row);

    switch (col)
    {
    case 0:

      if ( relation.getMasterKey() != null )
        return relation.getMasterKey();
      else
        return null;

    case 1:

      if ( relation.getForeignTable() != null )
        return relation.getForeignTable();
      else
        return null;

    case 2:

      if ( relation.getForeignKey() != null )
        return relation.getForeignKey();
      else
        return null;
    default:

      return null;
    }
  }

  /**
   * This method was created by a SmartGuide.
   * @return boolean
   * @param row int
   * @param col int
   */
  public boolean isCellEditable(int row, int col) {
    return true;
  }

  /**
   * Performs the refresh method.
   */
  public void refresh() {
    fireTableChanged(new javax.swing.event.TableModelEvent(this, -1, -1));

    return;
  }

  /**
   * This method was created by a SmartGuide.
   * @param table org.dbgen.Table
   */
  public void relationAdded(RelationAddedEvent event) {
    refresh();

    return;
  }

  /**
   * This method was created by a SmartGuide.
   */
  public void relationDeleted(RelationDeletedEvent event) {
    refresh();

    return;
  }

  /**
   * The removePropertyChangeListener method was generated to support the propertyChange field.
   */
  public synchronized void removePropertyChangeListener(java.beans.PropertyChangeListener listener) {
    propertyChange.removePropertyChangeListener(listener);
  }

  /**
   * Sets the table property (org.dbgen.Table) value.
   * @param table The new value for the property.
   * @see #getTable
   */
  public void setTable(Table table) {
    /* Get the old property value for fire property change event. */
    Table oldValue = fieldTable;

    /* Set the table property (attribute) to the new value. */
    fieldTable = table;

    /* Fire (signal/notify) the table property change event. */
    firePropertyChange("table", oldValue, table);

    /* Listen to field changed events */
    table.addRelationChangedListener(this);

    return;
  }

  /**
   * This method was created in VisualAge.
   * @param obj java.lang.Object
   * @param row int
   * @param col int
   */
  public void setValueAt(Object value, int row, int col) {
    try {
      Relation relation = (Relation) getTable().getRelations().elementAt(row);

      switch (col) {
      case 0 :
        relation.setMasterKey((Field) value);

        //				relation.setForeignTable(new Table());
        relation.setForeignKey(new Field());
      break;

      case 1 :
        relation.setForeignTable((Table) value);
      break;

      case 2 :
        relation.setForeignKey((Field) value);
      break;
      default :
      }

      fireTableRowsUpdated(row, row);
    } catch (Exception ex) {
      ex.printStackTrace();
    }
  }
}