Package org.pentaho.reporting.engine.classic.core.modules.parser.data.inlinedata

Source Code of org.pentaho.reporting.engine.classic.core.modules.parser.data.inlinedata.InlineTableRowReadHandler

/*
* 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.data.inlinedata;

import java.util.ArrayList;

import org.pentaho.reporting.libraries.xmlns.parser.AbstractXmlReadHandler;
import org.pentaho.reporting.libraries.xmlns.parser.IgnoreAnyChildReadHandler;
import org.pentaho.reporting.libraries.xmlns.parser.XmlReadHandler;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;

/**
* Todo: Document Me
*
* @author Thomas Morgner
*/
public class InlineTableRowReadHandler extends AbstractXmlReadHandler
{
  private ArrayList data;
  private Class[] types;
  private int columnCount;

  public InlineTableRowReadHandler(final Class[] types)
  {
    if (types == null)
    {
      throw new NullPointerException("Type-array must not be null.");
    }
    this.types = (Class[]) types.clone();
    this.data = new ArrayList();
  }

  /**
   * Returns the handler for a child element.
   *
   * @param uri     the URI of the namespace of the current element.
   * @param tagName the tag name.
   * @param atts    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 atts) throws SAXException
  {
    if (isSameNamespace(uri) == false)
    {
      return null;
    }

    if ("data".equals(tagName))
    {
      if (columnCount >= types.length)
      {
        return new IgnoreAnyChildReadHandler();
      }

      final InlineTableDataReadHandler dataReadHandler = new InlineTableDataReadHandler(types[columnCount]);
      columnCount += 1;
      data.add(dataReadHandler);
      return dataReadHandler;
    }

    return null;
  }


  /**
   * Returns the object for this element or null, if this element does not create an object.
   *
   * @return the object.
   * @throws SAXException if an parser error occured.
   */
  public Object getObject() throws SAXException
  {
    final Object[] result = new Object[types.length];

    final int size = Math.min(data.size(), types.length);
    for (int i = 0; i < size; i++)
    {
      final InlineTableDataReadHandler handler = (InlineTableDataReadHandler) data.get(i);
      result[i] = handler.getObject();
    }

    return result;
  }
}
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