Break.java

/*
 * Copyright 2008 Fedora Commons, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.mulgara.webquery.html;

/**
 * Represents a line break.
 *
 * @created Aug 4, 2008
 * @author Paula Gearon
 * @copyright © 2008 <a href="http://www.fedora-commons.org/">Fedora Commons</a>
 */
public class Break extends HtmlElement {

  /**
   * Creates a line break with a given indent.
   * @param indent The amount to indent by.
   */
  public Break(int indent) {
    super(indent);
  }


  /**
   * Creates a line break with no indenting.
   */
  Break() {
    this(0);
  }

  /**
   * @throws UnsupportedOperationException As sub elements are not possible for this element. 
   * @see org.mulgara.webquery.html.HtmlElement#add(org.mulgara.webquery.html.HtmlElement)
   */
  public HtmlElement add(HtmlElement elt) {
    throw new UnsupportedOperationException("Line breaks do not have sub elements.");
  }


  /**
   * @see org.mulgara.webquery.html.HtmlElement#addAttr(Attr, Object)
   */
  public HtmlElement addAttr(Attr attr, String val) {
    if (attr != Attr.ID && attr != Attr.CLASS && attr != Attr.STYLE && attr != Attr.TITLE) {
      throw new UnsupportedOperationException("Line breaks do not have attributes.");
    }
    return super.addAttr(attr, val);
  }



  protected String getTag() {
    return "br";
  }

}