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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
/*
* XSEC
*
* DSIGTransformXPathFilter := Class that performs XPath Filter
* transforms
*
* Author(s): Berin Lautenbach
*
* $Id: DSIGTransformXPathFilter.cpp 1125514 2011-05-20 19:08:33Z scantor $
*
*/
#include <xsec/dsig/DSIGTransformXPathFilter.hpp>
#include <xsec/dsig/DSIGXPathFilterExpr.hpp>
#include <xsec/dsig/DSIGSignature.hpp>
#include <xsec/framework/XSECError.hpp>
#include <xsec/framework/XSECEnv.hpp>
#include <xsec/transformers/TXFMXPathFilter.hpp>
#include <xsec/transformers/TXFMChain.hpp>
#include <xercesc/dom/DOMNode.hpp>
XERCES_CPP_NAMESPACE_USE
// --------------------------------------------------------------------------------
// Construct/Destruct
// --------------------------------------------------------------------------------
DSIGTransformXPathFilter::DSIGTransformXPathFilter(const XSECEnv * env, DOMNode * node) :
DSIGTransform(env, node),
m_loaded(false) {
}
DSIGTransformXPathFilter::DSIGTransformXPathFilter(const XSECEnv * env) :
DSIGTransform(env),
m_loaded(false) {
}
DSIGTransformXPathFilter::~DSIGTransformXPathFilter() {
exprVectorType::iterator i;
for (i = m_exprs.begin(); i != m_exprs.end(); ++i) {
delete (*i);
}
}
transformType DSIGTransformXPathFilter::getTransformType() {
return TRANSFORM_XPATH_FILTER;
}
void DSIGTransformXPathFilter::appendTransformer(TXFMChain * input) {
if (m_loaded == false) {
throw XSECException(XSECException::XPathFilterError,
"DSIGTransformXPathFilter::appendTransform - load not yet called");
}
#ifdef XSEC_NO_XPATH
throw XSECException(XSECException::UnsupportedFunction,
"XPath transforms are not supported in this compilation of the XSEC library");
#else
TXFMXPathFilter *xpf;
// XPath transform
XSECnew(xpf, TXFMXPathFilter(mp_txfmNode->getOwnerDocument()));
input->appendTxfm(xpf);
// These can throw, but the TXFMXPathFilter is now owned by the chain, so will
// be cleaned up down the calling stack.
xpf->evaluateExprs(&m_exprs);
#endif /* NO_XPATH */
}
// --------------------------------------------------------------------------------
// Create a blank transform
// --------------------------------------------------------------------------------
DOMElement * DSIGTransformXPathFilter::createBlankTransform(DOMDocument * parentDoc) {
safeBuffer str;
const XMLCh * prefix;
DOMElement *ret;
DOMDocument *doc = mp_env->getParentDocument();
prefix = mp_env->getDSIGNSPrefix();
// Create the transform node
makeQName(str, prefix, "Transform");
ret = doc->createElementNS(DSIGConstants::s_unicodeStrURIDSIG, str.rawXMLChBuffer());
ret->setAttributeNS(NULL,DSIGConstants::s_unicodeStrAlgorithm, DSIGConstants::s_unicodeStrURIXPF);
mp_txfmNode = ret;
m_loaded = true;
return ret;
}
DSIGXPathFilterExpr * DSIGTransformXPathFilter::appendFilter(xpathFilterType filterType,
const XMLCh * filterExpr) {
DSIGXPathFilterExpr * e;
XSECnew(e, DSIGXPathFilterExpr(mp_env));
DOMNode * elt = e->setFilter(filterType, filterExpr);
m_exprs.push_back(e);
mp_txfmNode->appendChild(elt);
mp_env->doPrettyPrint(mp_txfmNode);
return e;
}
// --------------------------------------------------------------------------------
// Load from XML
// --------------------------------------------------------------------------------
void DSIGTransformXPathFilter::load(void) {
if (mp_txfmNode == NULL) {
throw XSECException(XSECException::XPathFilterError,
"DSIGTransformXPathFilter::load called on NULL node");
}
// Very simple - go through each child. If it's an XPath child
// Create the DSIGXPathFilterExpr object
DOMNode * n = mp_txfmNode->getFirstChild();
while (n != NULL) {
if (n->getNodeType() == DOMNode::ELEMENT_NODE &&
strEquals(getXPFLocalName(n), "XPath")) {
DSIGXPathFilterExpr * xpf;
XSECnew(xpf, DSIGXPathFilterExpr(mp_env, n));
// Add it to the vector prior to load to ensure deleted if
// anything throws an exception
m_exprs.push_back(xpf);
xpf->load();
}
n = n->getNextSibling();
}
m_loaded = true;
}
// --------------------------------------------------------------------------------
// Retrieve expression information
// --------------------------------------------------------------------------------
unsigned int DSIGTransformXPathFilter::getExprNum(void) {
return (unsigned int) m_exprs.size();
}
DSIGXPathFilterExpr * DSIGTransformXPathFilter::expr(unsigned int n) {
if (n < m_exprs.size())
return m_exprs[n];
return NULL;
}
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