reportconfiguration.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.
 *
 * ------------------------
 * ReportConfiguration.java
 * ------------------------
 * (C)opyright 2002-2003, by Thomas Morgner and Contributors.
 *
 * Original Author:  Thomas Morgner;
 * Contributor(s):   David Gilbert (for Simba Management Limited);
 *
 * $Id: ReportConfiguration.java,v 1.12.2.1 2003/12/21 23:29:20 taqua Exp $
 *
 * Changes
 * -------
 * 06-Nov-2002 : Initial release
 * 12-Nov-2002 : Added Javadoc comments (DG);
 * 29-Nov-2002 : Fixed bugs reported by CheckStyle (DG)
 * 05-Dec-2002 : Documentation
 *
 */

package org.jfree.report.util;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.Collections;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.Properties;
import java.util.TreeSet;

import org.jfree.report.Boot;
import org.jfree.report.modules.PackageManager;
import org.jfree.util.Configuration;

/**
 * Global and local configurations for JFreeReport.
 * <p>
 * You can access the global configuration using this statement in your code:
 * <p>
 * <code>ReportConfiguration config = ReportConfiguration.getGlobalConfig();</code>
 * <p>
 * You can access the local configuration for a report using this:
 * <p>
 * <code>ReportConfiguration local = myReport.getReportConfiguration();
 * <p>
 * You can also specify the local configuration for a report via the XML report
 * template file.
 * <p>
 * todo document the initialization order ...
 * <p>
 * The report configuration can be modified using the configuration editor
 * in the gui-config module.
 *
 * @author Thomas Morgner
 */
public class ReportConfiguration implements Configuration, Serializable
{
  /** The text aliasing configuration key. */
  public static final String FONTRENDERER_USEALIASING
      = "org.jfree.report.layout.fontrenderer.UseAliasing";

  /** The text aliasing configuration default value. Is "false". */
  public static final String FONTRENDERER_USEALIASING_DEFAULT = "false";

  /** The G2 fontrenderer bug override configuration key. */
  public static final String FONTRENDERER_ISBUGGY_FRC
      = "org.jfree.report.layout.fontrenderer.IsBuggyFRC";

  /** The G2 fontrenderer bug override. Is "false". */
  public static final String FONTRENDERER_ISBUGGY_FRC_DEFAULT = "false";

  /** The property key, which defines whether to be verbose when generating the content. */
  public static final String PRINT_OPERATION_COMMENT
      = "org.jfree.report.PrintOperationComment";

  /** The default 'print operation comment' property value. */
  public static final String PRINT_OPERATION_COMMENT_DEFAULT = "false";

  /** The property key, which defines whether errors abort the report generation. */
  public static final String STRICT_ERRORHANDLING
      = "org.jfree.report.StrictErrorHandling";

  /** The default 'strict errorhandling' property value. */
  public static final String STRICT_ERRORHANDLING_DEFAULT = "true";

  /** The 'warn on invalid columns' property key. */
  public static final String WARN_INVALID_COLUMNS
      = "org.jfree.report.WarnInvalidColumns";

  /** The default 'warn on invalid columns' property value. */
  public static final String WARN_INVALID_COLUMNS_DEFAULT = "false";

  /** The 'disable logging' property key. */
  public static final String DISABLE_LOGGING
      = "org.jfree.report.NoDefaultDebug";

  /** The 'no-printer-available' property key. */
  public static final String NO_PRINTER_AVAILABLE
      = "org.jfree.report.NoPrinterAvailable";

  /** The default 'disable logging' property value. */
  public static final String DISABLE_LOGGING_DEFAULT = "false";

  /** The 'log level' property key. */
  public static final String LOGLEVEL
      = "org.jfree.report.LogLevel";

  /** The default 'log level' property value. */
  public static final String LOGLEVEL_DEFAULT = "Info";

  /** The 'log target' property key. */
  public static final String LOGTARGET = "org.jfree.report.LogTarget";

  /** The default 'log target' property value. */
  public static final String LOGTARGET_DEFAULT = SystemOutLogTarget.class.getName();

  /**
   * The default resourcebundle that should be used for ResourceFileFilter.
   * This property must be applied by the parser.
   */
  public static final String REPORT_RESOURCE_BUNDLE_KEY
      = "org.jfree.report.ResourceBundle";

  /**
   * Helper method to read the platform default encoding from the VM's system properties.
   * @return the contents of the system property "file.encoding".
   */
  public static String getPlatformDefaultEncoding()
  {
    try
    {
      return System.getProperty("file.encoding", "Cp1252");
    }
    catch (SecurityException se)
    {
      return "Cp1252";
    }
  }

  /** Storage for the configuration properties. */
  private final Properties configuration;

  /** The parent configuration (null if this is the root configuration). */
  private transient ReportConfiguration parentConfiguration;

  /** The global configuration. */
  private static transient ReportConfiguration globalConfig;

  /**
   * Default constructor.
   */
  protected ReportConfiguration()
  {
    configuration = new Properties();
  }

  /**
   * Creates a new report configuration.
   *
   * @param globalConfig  the global configuration.
   */
  public ReportConfiguration(final ReportConfiguration globalConfig)
  {
    this();
    parentConfiguration = globalConfig;
  }

  /**
   * Returns the configuration property with the specified key.
   *
   * @param key  the property key.
   *
   * @return the property value.
   */
  public String getConfigProperty(final String key)
  {
    return getConfigProperty(key, null);
  }

  /**
   * Returns the configuration property with the specified key
   * (or the specified default value if there is no such property).
   * <p>
   * If the property is not defined in this configuration, the code
   * will lookup the property in the parent configuration.
   *
   * @param key  the property key.
   * @param defaultValue  the default value.
   *
   * @return the property value.
   */
  public String getConfigProperty(final String key, final String defaultValue)
  {
    String value = configuration.getProperty(key);
    if (value == null)
    {
      if (isRootConfig())
      {
        value = defaultValue;
      }
      else
      {
        value = parentConfiguration.getConfigProperty(key, defaultValue);
      }
    }
    return value;
  }

  /**
   * Sets a configuration property.
   *
   * @param key  the property key.
   * @param value  the property value.
   */
  public void setConfigProperty(final String key, final String value)
  {
    if (key == null)
    {
      throw new NullPointerException();
    }

    if (value == null)
    {
      configuration.remove(key);
    }
    else
    {
      configuration.setProperty(key, value);
    }
  }

  /**
   * Returns true if this object has no parent.
   *
   * @return true, if this report is the root configuration, false otherwise.
   */
  private boolean isRootConfig()
  {
    return parentConfiguration == null;
  }

  /**
   * Returns the log level.
   *
   * @return the log level.
   */
  public String getLogLevel()
  {
    return getConfigProperty(LOGLEVEL, LOGLEVEL_DEFAULT);
  }

  /**
   * Sets the log level, which is read from the global report configuration at
   * the point that the classloader loads the {@link Log} class.
   * <p>
   * Valid log levels are:
   *
   * <ul>
   * <li><code>"Error"</code> - error messages;</li>
   * <li><code>"Warn"</code> - warning messages;</li>
   * <li><code>"Info"</code> - information messages;</li>
   * <li><code>"Debug"</code> - debug messages;</li>
   * </ul>
   *
   * Notes:
   * <ul>
   * <li>the setting is not case sensitive.</li>
   * <li>changing the log level after the {@link Log} class has been
   * loaded will have no effect.</li>
   * <li>to turn of logging altogether, use the {@link #setDisableLogging} method.</li>
   * </ul>
   *
   * @param level  the new log level.
   */
  public void setLogLevel(final String level)
  {
    setConfigProperty(LOGLEVEL, level);
  }

  /**
   * Returns <code>true</code> if logging is disabled, and <code>false</code> otherwise.
   *
   * @return true, if logging is completly disabled, false otherwise.
   */
  public boolean isDisableLogging()
  {
    return getConfigProperty
        (DISABLE_LOGGING, DISABLE_LOGGING_DEFAULT).equalsIgnoreCase("true");
  }

  /**
   * Sets the flag that disables logging.
   * <p>
   * To switch off logging globally, you can use the following code:
   * <p>
   * <code>ReportConfiguration.getGlobalConfig().setDisableLogging(true);</code>
   *
   * @param disableLogging  the flag.
   */
  public void setDisableLogging(final boolean disableLogging)
  {
    setConfigProperty(DISABLE_LOGGING, String.valueOf(disableLogging));
  }

  /**
   * Returns the collection of properties for the configuration.
   *
   * @return the properties.
   */
  protected Properties getConfiguration()
  {
    return configuration;
  }