/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 1999 The Apache Software Foundation.  All rights 
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:  
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Xalan" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written 
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation and was
 * originally based on software copyright (c) 1999, Lotus
 * Development Corporation., http://www.lotus.com.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */
package org.apache.xalan.xslt;

import org.w3c.dom.*;
import org.xml.sax.*;
import org.apache.xalan.xpath.*;
import org.apache.xalan.xpath.xml.QName;
import org.apache.xalan.xslt.res.XSLTErrorResources;
import org.apache.xalan.xpath.xml.XSLMessages;
import java.util.Stack;

/**
 * <meta name="usage" content="advanced"/>
 * Implement xsl:attribute-set.
 */
public class ElemAttributeSet extends ElemUse
{
  public QName m_qname = null;

  public int getXSLToken()
  {
    return Constants.ELEMNAME_DEFINEATTRIBUTESET;
  }
  
  ElemAttributeSet(XSLTEngineImpl processor,
                Stylesheet stylesheetTree,
                String name, 
                AttributeList atts,
                int lineNumber, int columnNumber)
    throws SAXException
  {
    super(processor, stylesheetTree, name, atts, lineNumber, columnNumber);
    int nAttrs = atts.getLength();
    for(int i = 0; i < nAttrs; i++)
    {
      String aname = atts.getName(i);
      if(aname.equals(Constants.ATTRNAME_NAME))
      {
        m_qname = new QName(atts.getValue(i), stylesheetTree.m_namespaces);
        m_stylesheet.addAttributeSet(m_qname, this);
      }
      else if(!(processUseAttributeSets(aname, atts, i) || isAttrOK(aname, atts, i)))
      {
		  processor.error(XSLTErrorResources.ER_ILLEGAL_ATTRIBUTE, new Object[] {name, aname}); //name+" has an illegal attribute: "+aname);
      }
    }
    if(null == m_qname)
    {
      processor.error(XSLTErrorResources.ER_NO_NAME_ATTRIB, new Object[] {name}); //name+" must have a name attribute.");
    }
  }
  
  public void execute(XSLTEngineImpl processor, 
                      Node sourceTree, 
                      Node sourceNode,
                      QName mode)
    throws XSLProcessorException, 
           java.net.MalformedURLException, 
           java.io.FileNotFoundException, 
           java.io.IOException,
           SAXException
  {
    if(null == processor.m_attrSetStack)
    {
      processor.m_attrSetStack = new Stack();
    }
    if(!processor.m_attrSetStack.empty())
    {
      int loc = processor.m_attrSetStack.search(this);
      if(loc > -1)
      {
        throw new SAXException(XSLMessages.createMessage(XSLTErrorResources.ER_XSLATTRSET_USED_ITSELF, new Object[]{m_qname.m_localpart})); //"xsl:attribute-set '"+m_qname.m_localpart+
          //"' used itself, which will cause an infinite loop.");
      }
    }
    
    processor.m_attrSetStack.push(this);
    super.execute(processor, sourceTree, sourceNode, mode);
    ElemAttribute attr = (ElemAttribute)getFirstChild();
    while(null != attr)
    {
      attr.execute(processor, sourceTree, sourceNode, mode);
      attr = (ElemAttribute)attr.getNextSibling();
    }
    processor.m_attrSetStack.pop();
  }
  
  /**
   * Add a child to the child list.
   * <!ELEMENT xsl:attribute-set (xsl:attribute)*>
   * <!ATTLIST xsl:attribute-set
   *   name %qname; #REQUIRED
   *   use-attribute-sets %qnames; #IMPLIED
   * >
   */
  public Node               appendChild(Node newChild)
    throws DOMException
  {
    int type = ((ElemTemplateElement)newChild).getXSLToken();
    switch(type)
    {
    case Constants.ELEMNAME_ATTRIBUTE:
      break;
      
    default:
      error(XSLTErrorResources.ER_CANNOT_ADD, new Object[] {((ElemTemplateElement)newChild).m_elemName, this.m_elemName}); //"Can not add " +((ElemTemplateElement)newChild).m_elemName +
            //" to " + this.m_elemName);
    }
    return super.appendChild(newChild);
  }

}