/**
 * ===========================================
 * LibLayout : a free Java layouting library
 * ===========================================
 *
 * Project Info:  http://reporting.pentaho.org/liblayout/
 *
 * (C) Copyright 2006-2007, by Pentaho Corporation 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.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * ------------
 * $Id: DefaultNamespaceDefinition.java 6489 2008-11-28 14:53:40Z tmorgner $
 * ------------
 * (C) Copyright 2006-2007, by Pentaho Corporation.
 */
package org.jfree.layouting.namespace;

import java.util.StringTokenizer;

import org.pentaho.reporting.libraries.resourceloader.ResourceKey;

/**
 * A default implementation of the NamespaceDefinition interface. This
 * implementation assumes that all elements use the same style and class
 * attributes.
 *
 * @author Thomas Morgner
 */
public class DefaultNamespaceDefinition implements NamespaceDefinition
{
  private String uri;
  private String[] classAttribute;
  private String[] styleAttribute;
  private ResourceKey defaultStyleSheet;
  private String preferredPrefix;

  public DefaultNamespaceDefinition(final String uri,
                                    final ResourceKey defaultStyleSheet,
                                    final String classAttribute,
                                    final String styleAttribute,
                                    final String preferredPrefix)
  {
    if (uri == null)
    {
      throw new NullPointerException();
    }
    this.uri = uri;
    this.defaultStyleSheet = defaultStyleSheet;
    this.classAttribute = buildArray(classAttribute);
    this.styleAttribute = buildArray(styleAttribute);
    this.preferredPrefix = preferredPrefix;
  }

  /**
   * This method accepts a whitespace separated list of tokens and transforms
   * it into a String array.
   *
   * @param attr the whitespace separated list of tokens
   * @return the contents as string array
   */
  private String[] buildArray (final String attr)
  {
    if (attr == null)
    {
      return new String[0];
    }

    final StringTokenizer strtok = new StringTokenizer(attr);
    final int size = strtok.countTokens();
    final String[] retval = new String[size];
    for (int i = 0; i < retval.length; i++)
    {
      retval[i] = strtok.nextToken();
    }
    return retval;
  }

  public String getURI()
  {
    return uri;
  }

  public String[] getClassAttribute(final String element)
  {
    return (String[]) classAttribute.clone();
  }

  public String[] getStyleAttribute(final String element)
  {
    return (String[]) styleAttribute.clone();
  }

  public ResourceKey getDefaultStyleSheetLocation()
  {
    return defaultStyleSheet;
  }

  public String getPreferredPrefix()
  {
    return preferredPrefix;
  }
}