1 /*
   2  * reserved comment block
   3  * DO NOT REMOVE OR ALTER!
   4  */
   5 /**
   6  * Licensed to the Apache Software Foundation (ASF) under one
   7  * or more contributor license agreements. See the NOTICE file
   8  * distributed with this work for additional information
   9  * regarding copyright ownership. The ASF licenses this file
  10  * to you under the Apache License, Version 2.0 (the
  11  * "License"); you may not use this file except in compliance
  12  * with the License. You may obtain a copy of the License at
  13  *
  14  * http://www.apache.org/licenses/LICENSE-2.0
  15  *
  16  * Unless required by applicable law or agreed to in writing,
  17  * software distributed under the License is distributed on an
  18  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  19  * KIND, either express or implied. See the License for the
  20  * specific language governing permissions and limitations
  21  * under the License.
  22  */
  23 package com.sun.org.apache.xml.internal.security.transforms.implementations;
  24 
  25 import java.io.OutputStream;
  26 
  27 import com.sun.org.apache.xml.internal.security.c14n.CanonicalizationException;
  28 import com.sun.org.apache.xml.internal.security.c14n.implementations.Canonicalizer20010315OmitComments;
  29 import com.sun.org.apache.xml.internal.security.signature.XMLSignatureInput;
  30 import com.sun.org.apache.xml.internal.security.transforms.Transform;
  31 import com.sun.org.apache.xml.internal.security.transforms.TransformSpi;
  32 import com.sun.org.apache.xml.internal.security.transforms.Transforms;
  33 
  34 /**
  35  * Implements the <CODE>http://www.w3.org/TR/2001/REC-xml-c14n-20010315</CODE>
  36  * transform.
  37  *
  38  * @author Christian Geuer-Pollmann
  39  */
  40 public class TransformC14N extends TransformSpi {
  41 
  42     /** Field implementedTransformURI */
  43     public static final String implementedTransformURI =
  44         Transforms.TRANSFORM_C14N_OMIT_COMMENTS;
  45 
  46     /**
  47      * @inheritDoc 
  48      */
  49     protected String engineGetURI() {
  50         return TransformC14N.implementedTransformURI;
  51     }
  52 
  53     protected XMLSignatureInput enginePerformTransform(
  54         XMLSignatureInput input, OutputStream os, Transform transformObject
  55     ) throws CanonicalizationException {   
  56         Canonicalizer20010315OmitComments c14n = new Canonicalizer20010315OmitComments();
  57         if (os != null) {
  58             c14n.setWriter(os);
  59         }
  60         byte[] result = null;                
  61         result = c14n.engineCanonicalize(input);                                                 
  62         XMLSignatureInput output = new XMLSignatureInput(result);
  63         if (os != null) {
  64             output.setOutputStream(os);
  65         }
  66         return output;     
  67     }
  68 }