/*
* 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.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: blautenb $
* @version $Revision: 1.5 $
*/
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 {
if (inclusiveNamespaces == null) {
return new XMLSignatureInput(c14n
.engineCanonicalizeXPathNodeSet(input.getNodeSet()));
} else {
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);
}
}
}