/*
* Portions Copyright 2005 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
/*
* ===========================================================================
*
* (C) Copyright IBM Corp. 2003 All Rights Reserved.
*
* ===========================================================================
*/
/*
* $Id: DOMXPathFilter2Transform.java,v 1.18 2005/09/19 18:30:30 mullan Exp $
*/
package org.jcp.xml.dsig.internal.dom;
import javax.xml.crypto.*;
import javax.xml.crypto.dsig.*;
import javax.xml.crypto.dsig.spec.TransformParameterSpec;
import javax.xml.crypto.dsig.spec.XPathType;
import javax.xml.crypto.dsig.spec.XPathFilter2ParameterSpec;
import java.security.InvalidAlgorithmParameterException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.HashMap;
import org.w3c.dom.Attr;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
/**
* DOM-based implementation of XPath Filter 2.0 Transform.
* (Uses Apache XML-Sec Transform implementation)
*
* @author Joyce Leung
*/
public final class DOMXPathFilter2Transform extends ApacheTransform {
public void init(TransformParameterSpec params)
throws InvalidAlgorithmParameterException {
if (params == null) {
throw new InvalidAlgorithmParameterException("params are required");
} else if (!(params instanceof XPathFilter2ParameterSpec)) {
throw new InvalidAlgorithmParameterException
("params must be of type XPathFilter2ParameterSpec");
}
this.params = params;
}
public void init(XMLStructure parent, XMLCryptoContext context)
throws InvalidAlgorithmParameterException {
super.init(parent, context);
try {
unmarshalParams(DOMUtils.getFirstChildElement(transformElem));
} catch (MarshalException me) {
throw (InvalidAlgorithmParameterException)
new InvalidAlgorithmParameterException().initCause(me);
}
}
private void unmarshalParams(Element curXPathElem) throws MarshalException {
List list = new ArrayList();
while (curXPathElem != null) {
String xPath = curXPathElem.getFirstChild().getNodeValue();
String filterVal =
DOMUtils.getAttributeValue(curXPathElem, "Filter");
if (filterVal == null) {
throw new MarshalException("filter cannot be null");
}
XPathType.Filter filter = null;
if (filterVal.equals("intersect")) {
filter = XPathType.Filter.INTERSECT;
} else if (filterVal.equals("subtract")) {
filter = XPathType.Filter.SUBTRACT;
} else if (filterVal.equals("union")) {
filter = XPathType.Filter.UNION;
} else {
throw new MarshalException("Unknown XPathType filter type"
+ filterVal);
}
NamedNodeMap attributes = curXPathElem.getAttributes();
if (attributes != null) {
int length = attributes.getLength();
Map namespaceMap = new HashMap(length);
for (int i = 0; i < length; i++) {
Attr attr = (Attr) attributes.item(i);
String prefix = attr.getPrefix();
if (prefix != null && prefix.equals("xmlns")) {
namespaceMap.put(attr.getLocalName(), attr.getValue());
}
}
list.add(new XPathType(xPath, filter, namespaceMap));
} else {
list.add(new XPathType(xPath, filter));
}
curXPathElem = DOMUtils.getNextSiblingElement(curXPathElem);
}
this.params = new XPathFilter2ParameterSpec(list);
}
public void marshalParams(XMLStructure parent, XMLCryptoContext context)
throws MarshalException {
super.marshalParams(parent, context);
XPathFilter2ParameterSpec xp =
(XPathFilter2ParameterSpec) getParameterSpec();
String prefix = DOMUtils.getNSPrefix(context, Transform.XPATH2);
String qname = (prefix == null) ? "xmlns" : "xmlns:" + prefix;
List list = xp.getXPathList();
for (int i = 0, size = list.size(); i < size; i++) {
XPathType xpathType = (XPathType) list.get(i);
Element elem = DOMUtils.createElement
(ownerDoc, "XPath", Transform.XPATH2, prefix);
elem.appendChild
(ownerDoc.createTextNode(xpathType.getExpression()));
DOMUtils.setAttribute
(elem, "Filter", xpathType.getFilter().toString());
elem.setAttributeNS("http://www.w3.org/2000/xmlns/", qname,
Transform.XPATH2);
// add namespace attributes, if necessary
Iterator it = xpathType.getNamespaceMap().entrySet().iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
elem.setAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns:"
+ (String) entry.getKey(), (String) entry.getValue());
}
transformElem.appendChild(elem);
}
}
}