Package org.pentaho.reporting.engine.classic.core.modules.parser.bundle.settings

Source Code of org.pentaho.reporting.engine.classic.core.modules.parser.bundle.settings.ConfigurationReadHandler

/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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.
*
* Copyright (c) 2001 - 2009 Object Refinery Ltd, Pentaho Corporation and Contributors..  All rights reserved.
*/

package org.pentaho.reporting.engine.classic.core.modules.parser.bundle.settings;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import org.pentaho.reporting.libraries.base.config.ModifiableConfiguration;
import org.pentaho.reporting.libraries.xmlns.parser.AbstractXmlReadHandler;
import org.pentaho.reporting.libraries.xmlns.parser.StringReadHandler;
import org.pentaho.reporting.libraries.xmlns.parser.XmlReadHandler;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;

public class ConfigurationReadHandler extends AbstractXmlReadHandler
{
  private ModifiableConfiguration configuration;
  private HashMap fieldHandlers;

  public ConfigurationReadHandler(final ModifiableConfiguration configuration)
  {
    this.configuration = configuration;
    this.fieldHandlers = new HashMap();
  }

  /**
   * Returns the handler for a child element.
   *
   * @param uri     the namespace.
   * @param tagName the tag name.
   * @param attrs   the attributes.
   * @return the handler or null, if the tagname is invalid.
   * @throws SAXException if there is a parsing error.
   */
  protected XmlReadHandler getHandlerForChild(final String uri,
                                              final String tagName,
                                              final Attributes attrs)
      throws SAXException
  {
    if (isSameNamespace(uri) == false)
    {
      return null;
    }

    if ("property".equals(tagName))
    {
      final String name = attrs.getValue(getUri(), "name");
      if (name == null)
      {
        throw new SAXException("Required attribute 'name' is missing.");
      }

      final StringReadHandler readHandler = new StringReadHandler();
      fieldHandlers.put(name, readHandler);
      return readHandler;
    }
    return null;
  }

  /**
   * Done parsing.
   *
   * @throws SAXException if there is a parsing error.
   */
  protected void doneParsing()
      throws SAXException
  {
    final Iterator it = fieldHandlers.entrySet().iterator();
    while (it.hasNext())
    {
      final Map.Entry entry = (Map.Entry) it.next();
      final String key = (String) entry.getKey();
      final StringReadHandler readHandler = (StringReadHandler) entry.getValue();
      configuration.setConfigProperty(key, readHandler.getResult());
    }
  }

  /**
   * Returns the object for this element.
   *
   * @return the object.
   */
  public Object getObject()
  {
    return configuration;
  }
}
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