| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * 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 com.sun.org.apache.xml.internal.security.transforms.implementations; |
| |
| |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Set; |
| |
| import javax.xml.parsers.ParserConfigurationException; |
| import javax.xml.transform.TransformerException; |
| |
| import com.sun.org.apache.xml.internal.security.c14n.CanonicalizationException; |
| import com.sun.org.apache.xml.internal.security.c14n.InvalidCanonicalizerException; |
| import com.sun.org.apache.xml.internal.security.exceptions.XMLSecurityException; |
| import com.sun.org.apache.xml.internal.security.signature.NodeFilter; |
| import com.sun.org.apache.xml.internal.security.signature.XMLSignatureInput; |
| import com.sun.org.apache.xml.internal.security.transforms.Transform; |
| import com.sun.org.apache.xml.internal.security.transforms.TransformSpi; |
| import com.sun.org.apache.xml.internal.security.transforms.TransformationException; |
| import com.sun.org.apache.xml.internal.security.transforms.Transforms; |
| import com.sun.org.apache.xml.internal.security.transforms.params.XPath2FilterContainer; |
| import com.sun.org.apache.xml.internal.security.utils.CachedXPathAPIHolder; |
| import com.sun.org.apache.xml.internal.security.utils.CachedXPathFuncHereAPI; |
| import com.sun.org.apache.xml.internal.security.utils.XMLUtils; |
| import org.w3c.dom.DOMException; |
| import org.w3c.dom.Document; |
| import org.w3c.dom.Element; |
| import org.w3c.dom.Node; |
| import org.w3c.dom.NodeList; |
| import org.xml.sax.SAXException; |
| |
| /** |
| * Implements the <I>XML Signature XPath Filter v2.0</I> |
| * |
| * @author $Author: mullan $ |
| * @see <A HREF="http://www.w3.org/TR/xmldsig-filter2/">XPath Filter v2.0 (TR)</A> |
| * @see <a HREF="http://www.w3.org/Signature/Drafts/xmldsig-xfilter2/">XPath Filter v2.0 (editors copy)</a> |
| */ |
| public class TransformXPath2Filter extends TransformSpi { |
| |
| /** {@link java.util.logging} logging facility */ |
| // static java.util.logging.Logger log = |
| // java.util.logging.Logger.getLogger( |
| // TransformXPath2Filter.class.getName()); |
| |
| /** Field implementedTransformURI */ |
| public static final String implementedTransformURI = |
| Transforms.TRANSFORM_XPATH2FILTER; |
| //J- |
| // contains the type of the filter |
| |
| // contains the node set |
| |
| /** |
| * Method engineGetURI |
| * |
| * @inheritDoc |
| */ |
| protected String engineGetURI() { |
| return implementedTransformURI; |
| } |
| |
| |
| |
| /** |
| * Method enginePerformTransform |
| * @inheritDoc |
| * @param input |
| * |
| * @throws TransformationException |
| */ |
| protected XMLSignatureInput enginePerformTransform(XMLSignatureInput input, Transform _transformObject) |
| throws TransformationException { |
| CachedXPathAPIHolder.setDoc(_transformObject.getElement().getOwnerDocument()); |
| try { |
| List unionNodes=new ArrayList(); |
| List substractNodes=new ArrayList(); |
| List intersectNodes=new ArrayList(); |
| |
| CachedXPathFuncHereAPI xPathFuncHereAPI = |
| new CachedXPathFuncHereAPI(CachedXPathAPIHolder.getCachedXPathAPI()); |
| |
| |
| Element []xpathElements =XMLUtils.selectNodes( |
| _transformObject.getElement().getFirstChild(), |
| XPath2FilterContainer.XPathFilter2NS, |
| XPath2FilterContainer._TAG_XPATH2); |
| int noOfSteps = xpathElements.length; |
| |
| |
| if (noOfSteps == 0) { |
| Object exArgs[] = { Transforms.TRANSFORM_XPATH2FILTER, "XPath" }; |
| |
| throw new TransformationException("xml.WrongContent", exArgs); |
| } |
| |
| Document inputDoc = null; |
| if (input.getSubNode() != null) { |
| inputDoc = XMLUtils.getOwnerDocument(input.getSubNode()); |
| } else { |
| inputDoc = XMLUtils.getOwnerDocument(input.getNodeSet()); |
| } |
| |
| for (int i = 0; i < noOfSteps; i++) { |
| Element xpathElement =XMLUtils.selectNode( |
| _transformObject.getElement().getFirstChild(), |
| XPath2FilterContainer.XPathFilter2NS, |
| XPath2FilterContainer._TAG_XPATH2,i); |
| XPath2FilterContainer xpathContainer = |
| XPath2FilterContainer.newInstance(xpathElement, |
| input.getSourceURI()); |
| |
| |
| NodeList subtreeRoots = xPathFuncHereAPI.selectNodeList(inputDoc, |
| xpathContainer.getXPathFilterTextNode(), |
| CachedXPathFuncHereAPI.getStrFromNode(xpathContainer.getXPathFilterTextNode()), |
| xpathContainer.getElement()); |
| if (xpathContainer.isIntersect()) { |
| intersectNodes.add(subtreeRoots); |
| } else if (xpathContainer.isSubtract()) { |
| substractNodes.add(subtreeRoots); |
| } else if (xpathContainer.isUnion()) { |
| unionNodes.add(subtreeRoots); |
| } |
| } |
| |
| |
| input.addNodeFilter(new XPath2NodeFilter(unionNodes, substractNodes, |
| intersectNodes)); |
| input.setNodeSet(true); |
| return input; |
| } catch (TransformerException ex) { |
| throw new TransformationException("empty", ex); |
| } catch (DOMException ex) { |
| throw new TransformationException("empty", ex); |
| } catch (CanonicalizationException ex) { |
| throw new TransformationException("empty", ex); |
| } catch (InvalidCanonicalizerException ex) { |
| throw new TransformationException("empty", ex); |
| } catch (XMLSecurityException ex) { |
| throw new TransformationException("empty", ex); |
| } catch (SAXException ex) { |
| throw new TransformationException("empty", ex); |
| } catch (IOException ex) { |
| throw new TransformationException("empty", ex); |
| } catch (ParserConfigurationException ex) { |
| throw new TransformationException("empty", ex); |
| } |
| } |
| } |
| |
| class XPath2NodeFilter implements NodeFilter { |
| boolean hasUnionFilter; |
| boolean hasSubstractFilter; |
| boolean hasIntersectFilter; |
| XPath2NodeFilter(List unionNodes, List substractNodes, |
| List intersectNodes) { |
| hasUnionFilter=!unionNodes.isEmpty(); |
| this.unionNodes=convertNodeListToSet(unionNodes); |
| hasSubstractFilter=!substractNodes.isEmpty(); |
| this.substractNodes=convertNodeListToSet(substractNodes); |
| hasIntersectFilter=!intersectNodes.isEmpty(); |
| this.intersectNodes=convertNodeListToSet(intersectNodes); |
| } |
| Set unionNodes; |
| Set substractNodes; |
| Set intersectNodes; |
| |
| |
| /** |
| * @see com.sun.org.apache.xml.internal.security.signature.NodeFilter#isNodeInclude(org.w3c.dom.Node) |
| */ |
| public int isNodeInclude(Node currentNode) { |
| int result=1; |
| |
| if (hasSubstractFilter && rooted(currentNode, substractNodes)) { |
| result = -1; |
| } else if (hasIntersectFilter && !rooted(currentNode, intersectNodes)) { |
| result = 0; |
| } |
| |
| //TODO OPTIMIZE |
| if (result==1) |
| return 1; |
| if (hasUnionFilter) { |
| if (rooted(currentNode, unionNodes)) { |
| return 1; |
| } |
| result=0; |
| } |
| return result; |
| |
| } |
| int inSubstract=-1; |
| int inIntersect=-1; |
| int inUnion=-1; |
| public int isNodeIncludeDO(Node n, int level) { |
| int result=1; |
| if (hasSubstractFilter) { |
| if ((inSubstract==-1) || (level<=inSubstract)) { |
| if (inList(n, substractNodes)) { |
| inSubstract=level; |
| } else { |
| inSubstract=-1; |
| } |
| } |
| if (inSubstract!=-1){ |
| result=-1; |
| } |
| } |
| if (result!=-1){ |
| if (hasIntersectFilter) { |
| if ((inIntersect==-1) || (level<=inIntersect)) { |
| if (!inList(n, intersectNodes)) { |
| inIntersect=-1; |
| result=0; |
| } else { |
| inIntersect=level; |
| } |
| } |
| } |
| } |
| |
| if (level<=inUnion) |
| inUnion=-1; |
| if (result==1) |
| return 1; |
| if (hasUnionFilter) { |
| if ((inUnion==-1) && inList(n, unionNodes)) { |
| inUnion=level; |
| } |
| if (inUnion!=-1) |
| return 1; |
| result=0; |
| } |
| |
| return result; |
| } |
| |
| /** |
| * Method rooted |
| * @param currentNode |
| * @param nodeList |
| * |
| * @return if rooted bye the rootnodes |
| */ |
| static boolean rooted(Node currentNode, Set nodeList ) { |
| if (nodeList.isEmpty()) { |
| return false; |
| } |
| if (nodeList.contains(currentNode)) { |
| return true; |
| } |
| Iterator it=nodeList.iterator(); |
| while (it.hasNext()) { |
| Node rootNode = (Node) it.next(); |
| if (XMLUtils.isDescendantOrSelf(rootNode,currentNode)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Method rooted |
| * @param currentNode |
| * @param nodeList |
| * |
| * @return if rooted bye the rootnodes |
| */ |
| static boolean inList(Node currentNode, Set nodeList ) { |
| return nodeList.contains(currentNode); |
| } |
| |
| private static Set convertNodeListToSet(List l){ |
| Set result=new HashSet(); |
| for (int j=0;j<l.size();j++) { |
| NodeList rootNodes=(NodeList) l.get(j); |
| int length = rootNodes.getLength(); |
| for (int i = 0; i < length; i++) { |
| Node rootNode = rootNodes.item(i); |
| result.add(rootNode); |
| } |
| } |
| return result; |
| } |
| } |
