plaindatarow.java

报表设计软件,很好的

/**
 * ========================================
 * JFreeReport : a free Java report library
 * ========================================
 *
 * Project Info:  http://www.jfree.org/jfreereport/index.html
 * Project Lead:  Thomas Morgner ([e-mail]);
 *
 * (C) Copyright 2000-2003, by Simba Management Limited and Contributors.
 *
 * 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., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * ------------------------------
 * PlainDataRow.java
 * ------------------------------
 * (C)opyright 2003, by Thomas Morgner and Contributors.
 *
 * Original Author:  Thomas Morgner;
 * Contributor(s):   David Gilbert (for Simba Management Limited);
 *
 * $Id: PlainDataRow.java,v 1.2 2004/04/20 18:54:53 taqua Exp $
 *
 * Changes
 * -------------------------
 * 28.10.2003 : Initial version
 *
 */

package org.jfree.designer.visualeditor;

import java.io.Serializable;
import java.util.ArrayList;

import org.jfree.report.Band;
import org.jfree.report.DataRow;
import org.jfree.report.Element;
import org.jfree.report.Group;
import org.jfree.report.JFreeReport;
import org.jfree.report.filter.DataRowConnectable;
import org.jfree.report.filter.DataSource;
import org.jfree.report.states.DataRowConnector;

public final class PlainDataRow
        implements DataRow, Serializable
{
  private final ArrayList valueList;
  private final ArrayList nameList;

  public PlainDataRow ()
  {
    this.nameList = new ArrayList();
    this.valueList = new ArrayList();
  }

  public final void clear ()
  {
    nameList.clear();
    valueList.clear();
  }

  public final void removeColumn (final String name)
  {
    final int idx = nameList.indexOf(name);
    if (idx == -1)
    {
      return;
    }
    nameList.remove(idx);
    valueList.remove(idx);
  }

  /**
   * Returns the column position of the column, expression or function with the given name
   * or -1 if the given name does not exist in this DataRow.
   *
   * @param name the item name.
   * @return the item index.
   */
  public final int findColumn (final String name)
  {
    return nameList.indexOf(name);
  }

  /**
   * Returns the value of the function, expression or column in the tablemodel using the
   * column number. For functions and expressions, the <code>getValue()</code> method is
   * called and for columns from the tablemodel the tablemodel method
   * <code>getValueAt(row, column)</code> gets called.
   *
   * @param col the item index.
   * @return the value.
   */
  public final Object get (final int col)
  {
    return valueList.get(col);
  }

  /**
   * Returns the value of the function, expression or column using its specific name. The
   * given name is translated into a valid column number and the the column is queried.
   * For functions and expressions, the <code>getValue()</code> method is called and for
   * columns from the tablemodel the tablemodel method <code>getValueAt(row,
   * column)</code> gets called.
   *
   * @param col the item index.
   * @return the value.
   *
   * @throws IllegalStateException if the datarow detected a deadlock.
   */
  public final Object get (final String col)
          throws IllegalStateException
  {
    final int colIdx = findColumn(col);
    if (colIdx == -1)
    {
      return null;
    }
    return get(colIdx);
  }

  /**
   * Returns the number of columns, expressions and functions and marked ReportProperties
   * in the report.
   *
   * @return the item count.
   */
  public final int getColumnCount ()
  {
    return nameList.size();
  }

  /**
   * Returns the name of the column, expression or function. For columns from the
   * tablemodel, the tablemodels <code>getColumnName</code> method is called. For
   * functions, expressions and report properties the assigned name is returned.
   *
   * @param col the item index.
   * @return the name.
   */
  public final String getColumnName (final int col)
  {
    return (String) nameList.get(col);
  }

  public final void addColumn (final String name, final Object value)
  {
    nameList.add(name);
    valueList.add(value);
  }


  /**
   * Connects the Report and all contained bands and all Elements within the bands to this
   * DataRow.
   *
   * @param report the report which will be connected
   */
  public final void connectDataSources (final JFreeReport report)
  {
    connectDataSources(report.getPageFooter());
    connectDataSources(report.getPageHeader());
    connectDataSources(report.getReportFooter());
    connectDataSources(report.getReportHeader());
    connectDataSources(report.getItemBand());

    final int groupCount = report.getGroupCount();
    for (int i = 0; i < groupCount; i++)
    {
      final Group g = report.getGroup(i);
      connectDataSources(g.getFooter());
      connectDataSources(g.getHeader());
    }
  }

  /**
   * Connects the Band and all Elements within the band to this DataRow.
   *
   * @param band the band which will be connected.
   */
  protected final void connectDataSources (final Band band)
  {
    final Element[] elements = band.getElementArray();
    for (int i = 0; i < elements.length; i++)
    {
      final Element e = elements[i];
      if (e instanceof Band)
      {
        connectDataSources((Band) e);
      }
      else
      {
        connectDataSource(e);
      }
    }
  }

  public final void connectDataSource (final Element e)
  {
    final DataSource ds = DataRowConnector.getLastDatasource(e);
    if (ds instanceof DataRowConnectable)
    {
      final DataRowConnectable dc = (DataRowConnectable) ds;
      dc.connectDataRow(this);
    }
  }

  /**
   * Connects the Report and all contained bands and all Elements within the bands to this
   * DataRow.
   *
   * @param report the report which will be connected
   */
  public final void disconnectDataSources (final JFreeReport report)
  {
    disconnectDataSources(report.getPageFooter());
    disconnectDataSources(report.getPageHeader());
    disconnectDataSources(report.getReportFooter());
    disconnectDataSources(report.getReportHeader());
    disconnectDataSources(report.getItemBand());

    final int groupCount = report.getGroupCount();
    for (int i = 0; i < groupCount; i++)
    {
      final Group g = report.getGroup(i);
      disconnectDataSources(g.getFooter());
      disconnectDataSources(g.getHeader());
    }
  }

  /**
   * Connects the Band and all Elements within the band to this DataRow.
   *
   * @param band the band which will be connected.
   */
  protected final void disconnectDataSources (final Band band)
  {
    final Element[] elements = band.getElementArray();
    for (int i = 0; i < elements.length; i++)
    {
      final Element e = elements[i];
      if (e instanceof Band)
      {
        connectDataSources((Band) e);
      }
      else
      {
        disconnectDataSource(e);
      }
    }
  }

  public final void disconnectDataSource (final Element e)
  {
    final DataSource ds = DataRowConnector.getLastDatasource(e);
    if (ds instanceof DataRowConnectable)
    {
      final DataRowConnectable dc = (DataRowConnectable) ds;
      dc.disconnectDataRow(this);
    }
  }
}