/*
 * Copyright  1999-2004 The Apache Software Foundation.
 *
 *  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.apache.xml.security.transforms.implementations;



import java.io.IOException;

import javax.xml.parsers.ParserConfigurationException;

import org.apache.bcel.classfile.Node;
import org.apache.xml.security.c14n.CanonicalizationException;
import org.apache.xml.security.c14n.InvalidCanonicalizerException;
import org.apache.xml.security.c14n.implementations.Canonicalizer20010315ExclOmitComments;
import org.apache.xml.security.exceptions.XMLSecurityException;
import org.apache.xml.security.signature.XMLSignatureInput;
import org.apache.xml.security.transforms.TransformSpi;
import org.apache.xml.security.transforms.Transforms;
import org.apache.xml.security.transforms.params.InclusiveNamespaces;
import org.w3c.dom.Element;
import org.xml.sax.SAXException;


/**
 * Class TransformC14NExclusive
 *
 * @author $Author$
 * @version $Revision$
 */
public class TransformC14NExclusive extends TransformSpi {

   /** Field implementedTransformURI */
   public static final String implementedTransformURI =
      Transforms.TRANSFORM_C14N_EXCL_OMIT_COMMENTS;

   //J-
   public boolean wantsOctetStream ()   { return false; }
   public boolean wantsNodeSet ()       { return true; }
   public boolean returnsOctetStream () { return true; }
   public boolean returnsNodeSet ()     { return false; }
   //J+

   /**
    * Method engineGetURI
    *
    *
    */
   protected String engineGetURI() {
      return implementedTransformURI;
   }

   /**
    * Method enginePerformTransform
    *
    * @param input
    *
    * @throws CanonicalizationException
    * @throws InvalidCanonicalizerException
    */
   protected XMLSignatureInput enginePerformTransform(XMLSignatureInput input)
           throws CanonicalizationException, InvalidCanonicalizerException {

      try {
         InclusiveNamespaces inclusiveNamespaces = null;

         if (this._transformObject
                 .length(InclusiveNamespaces
                    .ExclusiveCanonicalizationNamespace, InclusiveNamespaces
                    ._TAG_EC_INCLUSIVENAMESPACES) == 1) {
            Element inclusiveElement =
               this._transformObject.getChildElementLocalName(0,
                  InclusiveNamespaces.ExclusiveCanonicalizationNamespace,
                  InclusiveNamespaces._TAG_EC_INCLUSIVENAMESPACES);

            inclusiveNamespaces = new InclusiveNamespaces(inclusiveElement,
                    this._transformObject.getBaseURI());
         }

         Canonicalizer20010315ExclOmitComments c14n =
            new Canonicalizer20010315ExclOmitComments();
         
         if (input.isOctetStream()) {
            return new XMLSignatureInput(c14n
               .engineCanonicalize(input.getBytes()));
         } else {
         	byte []result;
            if (inclusiveNamespaces == null) {
            	if (input.isElement()) {
             		org.w3c.dom.Node excl=input.getExcludeNode();             	
             		result=c14n.engineCanonicalizeSubTree(input.getSubNode(),"",excl);             		
             	} else {
             		result=c14n
	                  .engineCanonicalizeXPathNodeSet(input.getNodeSet());
             	}
               return new XMLSignatureInput(result);
            } else {
            	if (input.isElement()) {
            		org.w3c.dom.Node excl=input.getExcludeNode();
            		return new XMLSignatureInput(c14n
                            .engineCanonicalizeSubTree(input
                               .getSubNode(), inclusiveNamespaces
                               .getInclusiveNamespaces(),excl));
            	}
               return new XMLSignatureInput(c14n
                  .engineCanonicalizeXPathNodeSet(input
                     .getNodeSet(), inclusiveNamespaces
                     .getInclusiveNamespaces()));
            }
         }
      } catch (IOException ex) {
         throw new CanonicalizationException("empty", ex);
      } catch (ParserConfigurationException ex) {
         throw new CanonicalizationException("empty", ex);
      } catch (XMLSecurityException ex) {
         throw new CanonicalizationException("empty", ex);
      } catch (SAXException ex) {
         throw new CanonicalizationException("empty", ex);
      }
   }
}

@@ -778,47 +778,8 @@
 n;%0A%0A
-import org.apache.bcel.classfile.Node;%0A
 impo

Remove unnecessary import