/*
* 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 java.io.OutputStream;
import javax.xml.parsers.ParserConfigurationException;
import org.apache.xml.security.c14n.CanonicalizationException;
import org.apache.xml.security.c14n.implementations.Canonicalizer20010315ExclWithComments;
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.apache.xml.security.utils.XMLUtils;
import org.w3c.dom.Element;
import org.xml.sax.SAXException;
/**
* Implements the <CODE>http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments</CODE>
* transform.
*
* @author Christian Geuer-Pollmann
*/
public class TransformC14NExclusiveWithComments extends TransformSpi {
/** Field implementedTransformURI */
public static final String implementedTransformURI =
Transforms.TRANSFORM_C14N_EXCL_WITH_COMMENTS;
//J-
/** @inheritDoc */
public boolean wantsOctetStream () { return false; }
/** @inheritDoc */
public boolean wantsNodeSet () { return true; }
/** @inheritDoc */
public boolean returnsOctetStream () { return true; }
/** @inheritDoc */
public boolean returnsNodeSet () { return false; }
//J+
/**
* Method engineGetURI
*@inheritDoc
*
*/
protected String engineGetURI() {
return implementedTransformURI;
}
/**
* @inheritDoc
*/
protected XMLSignatureInput enginePerformTransform(XMLSignatureInput input)
throws CanonicalizationException {
return enginePerformTransform(input,null);
}
protected XMLSignatureInput enginePerformTransform(XMLSignatureInput input,OutputStream os)
throws CanonicalizationException {
try {
String inclusiveNamespaces = null;
if (this._transformObject
.length(InclusiveNamespaces
.ExclusiveCanonicalizationNamespace, InclusiveNamespaces
._TAG_EC_INCLUSIVENAMESPACES) == 1) {
Element inclusiveElement =
XMLUtils.selectNode(
this._transformObject.getElement().getFirstChild(),
InclusiveNamespaces.ExclusiveCanonicalizationNamespace,
InclusiveNamespaces._TAG_EC_INCLUSIVENAMESPACES,0);
inclusiveNamespaces = new InclusiveNamespaces(inclusiveElement,
this._transformObject.getBaseURI()).getInclusiveNamespaces();
}
Canonicalizer20010315ExclWithComments c14n =
new Canonicalizer20010315ExclWithComments();
c14n.set_includeComments(!input.isExcludeComments());
if (os!=null) {
c14n.setWriter( os);
}
byte []result;
if (input.isOctetStream()) {
result=c14n.engineCanonicalize(input.getBytes());
} else if (input.isElement()) {
org.w3c.dom.Node excl=input.getExcludeNode();
result =c14n
.engineCanonicalizeSubTree(input
.getSubNode(), inclusiveNamespaces
,excl);
} else {
result = c14n
.engineCanonicalizeXPathNodeSet(input
.getNodeSet(), inclusiveNamespaces
);
}
XMLSignatureInput output=new XMLSignatureInput(result);
if (os!=null) {
output.setOutputStream(os);
}
return output;
} 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);
}
}
}