resourcelabelelementfactory.java

swing编写的库存管理程序。毕业设计类

/**
 * ========================================
 * JFreeReport : a free Java report library
 * ========================================
 *
 * Project Info:  http://www.jfree.org/jfreereport/index.html
 * Project Lead:  Thomas Morgner;
 *
 * (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.
 *
 * ------------------------------
 * LabelElementFactory.java
 * ------------------------------
 * (C)opyright 2003, by Thomas Morgner and Contributors.
 *
 * Original Author:  Thomas Morgner;
 * Contributor(s):   David Gilbert (for Simba Management Limited);
 *
 * $Id: ResourceLabelElementFactory.java,v 1.6 2003/11/01 19:52:27 taqua Exp $
 *
 * Changes
 * -------------------------
 * 06-Jul-2003 : Initial version
 *
 */

package org.jfree.report.elementfactory;

import java.awt.Color;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;

import org.jfree.report.Element;
import org.jfree.report.ElementAlignment;
import org.jfree.report.TextElement;
import org.jfree.report.filter.templates.ResourceLabelTemplate;
import org.jfree.report.style.FontDefinition;
import org.jfree.ui.FloatDimension;

/**
 * A factory to define translateable LabelElements. LabelElements are considered
 * immutable and should not be modified once they are created. The label expects
 * plain text. The content of the label will be translated using an assigned
 * resource bundle.
 *
 * @author Thomas Morgner
 */
public class ResourceLabelElementFactory extends TextElementFactory
{
  /** The resource base from which to read the translations. */
  private String resourceBase;

  /** The nullstring of the text element if the translation was not found. */
  private String nullString;
  /** The resource key which is used to retrieve the translation. */
  private String resourceKey;

  /**
   * DefaultConstructor.
   */
  public ResourceLabelElementFactory()
  {
  }

  /**
   * Returns the base name of the resource bundle used to translate the content later.
   *
   * @return the resource bundle name of the element.
   */
  public String getResourceBase()
  {
    return resourceBase;
  }

  /**
   * Defines the base name of the resource bundle used to translate the content later.
   *
   * @param resourceBase the resource bundle name of the element.
   */
  public void setResourceBase(final String resourceBase)
  {
    this.resourceBase = resourceBase;
  }

  /**
   * Returns the null string for the text element. The null string is used when no
   * content is found for that element.
   *
   * @return the null string.
   */
  public String getNullString()
  {
    return nullString;
  }

  /**
   * Defines the null string for the text element. The null string is used when no
   * content is found for that element. The nullstring itself can be null.
   *
   * @param nullString the null string.
   */
  public void setNullString(final String nullString)
  {
    this.nullString = nullString;
  }

  /**
   * Returns the resource key that contains the label text.
   *
   * @return the label resource bundle key.
   */
  public String getResourceKey()
  {
    return resourceKey;
  }

  /**
   * Defines the resource key, which will be used to read the translated label text.
   *
   * @param resourceKey the resource bundle key.
   */
  public void setResourceKey(final String resourceKey)
  {
    this.resourceKey = resourceKey;
  }

  /**
   * Generates the element based on the defined properties.
   *
   * @see org.jfree.report.elementfactory.ElementFactory#createElement()
   * @return the generated element.
   * @throws NullPointerException if the resource class name is null.
   * @throws IllegalStateException if the resource key is not defined.
   */
  public Element createElement()
  {
    if (getResourceKey() == null)
    {
      throw new IllegalStateException("ResourceKey is not set.");
    }

    final ResourceLabelTemplate template = new ResourceLabelTemplate();
    template.setResourceClassName(getResourceBase());
    template.setContent(getResourceKey());
    template.setNullValue(getNullString());

    final TextElement element = new TextElement();
    applyElementName(element);
    element.setDataSource(template);
    applyStyle(element.getStyle());
    return element;
  }


  /**
   * Creates a ResourceElement. ResourceElements resolve their value using a
   * <code>java.util.ResourceBundle</code>.
   *
   * @param name  the name of the new element.
   * @param bounds  the bounds of the new element.
   * @param paint  the text color of this text element.
   * @param alignment  the horizontal alignment.
   * @param valign  the vertical alignment.
   * @param font  the font for this element.
   * @param resourceKey the key which is used to query the resource bundle
   * @param resourceBase the classname/basename of the assigned resource bundle
   * @param nullValue the null string of the text element (can be null).
   * @return the created ResourceElement
   */
  public static TextElement createResourceLabel(final String name,
                                                final Rectangle2D bounds,
                                                final Color paint,
                                                final ElementAlignment alignment,
                                                final ElementAlignment valign,
                                                final FontDefinition font,
                                                final String nullValue,
                                                final String resourceBase,
                                                final String resourceKey)
  {
    final ResourceLabelElementFactory factory = new ResourceLabelElementFactory();
    factory.setAbsolutePosition(new Point2D.Double(bounds.getX(), bounds.getY()));
    factory.setMinimumSize(new FloatDimension
        ((float) bounds.getWidth(), (float) bounds.getHeight()));
    factory.setName(name);
    factory.setColor(paint);
    factory.setHorizontalAlignment(alignment);
    factory.setVerticalAlignment(valign);

    if (font != null)
    {
      factory.setFontName(font.getFontName());
      factory.setFontSize(new Integer(font.getFontSize()));
      factory.setBold(new Boolean(font.isBold()));
      factory.setItalic(new Boolean(font.isItalic()));
      factory.setEncoding(font.getFontEncoding(null));
      factory.setUnderline(new Boolean(font.isUnderline()));
      factory.setStrikethrough(new Boolean(font.isStrikeThrough()));
      factory.setEmbedFont(new Boolean(font.isEmbeddedFont()));
    }
    factory.setNullString(nullValue);
    factory.setResourceBase(resourceBase);
    factory.setResourceKey(resourceKey);
    return (TextElement) factory.createElement();
  }


}