package com.sun.org.apache.xml.internal.security.transforms.implementations;
import javax.xml.transform.TransformerException;
import com.sun.org.apache.xml.internal.security.exceptions.XMLSecurityRuntimeException;
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.utils.CachedXPathAPIHolder;
import com.sun.org.apache.xml.internal.security.utils.CachedXPathFuncHereAPI;
import com.sun.org.apache.xml.internal.security.utils.Constants;
import com.sun.org.apache.xml.internal.security.utils.XMLUtils;
import com.sun.org.apache.xml.internal.utils.PrefixResolverDefault;
import com.sun.org.apache.xpath.internal.objects.XObject;
import org.w3c.dom.DOMException;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
public class TransformXPath extends TransformSpi {
public static final String implementedTransformURI =
Transforms.TRANSFORM_XPATH;
protected String engineGetURI() {
return implementedTransformURI;
}
protected XMLSignatureInput enginePerformTransform(XMLSignatureInput input, Transform _transformObject)
throws TransformationException {
try {
CachedXPathAPIHolder.setDoc(_transformObject.getElement().getOwnerDocument());
Element xpathElement =XMLUtils.selectDsNode(
_transformObject.getElement().getFirstChild(),
Constants._TAG_XPATH,0);
if (xpathElement == null) {
Object exArgs[] = { "ds:XPath", "Transform" };
throw new TransformationException("xml.WrongContent", exArgs);
}
Node xpathnode = xpathElement.getChildNodes().item(0);
String str=CachedXPathFuncHereAPI.getStrFromNode(xpathnode);
input.setNeedsToBeExpanded(needsCircunvent(str));
if (xpathnode == null) {
throw new DOMException(DOMException.HIERARCHY_REQUEST_ERR,
"Text must be in ds:Xpath");
}
input.addNodeFilter(new XPathNodeFilter( xpathElement, xpathnode, str));
input.setNodeSet(true);
return input;
} catch (DOMException ex) {
throw new TransformationException("empty", ex);
}
}
private boolean needsCircunvent(String str) {
return (str.indexOf("namespace") != -1) || (str.indexOf("name()") != -1);
}
static class XPathNodeFilter implements NodeFilter {
PrefixResolverDefault prefixResolver;
CachedXPathFuncHereAPI xPathFuncHereAPI =
new CachedXPathFuncHereAPI(CachedXPathAPIHolder.getCachedXPathAPI());
Node xpathnode;
String str;
XPathNodeFilter(Element xpathElement,
Node xpathnode, String str) {
this.xpathnode=xpathnode;
this.str=str;
prefixResolver =new PrefixResolverDefault(xpathElement);
}
public int isNodeInclude(Node currentNode) {
XObject includeInResult;
try {
includeInResult = xPathFuncHereAPI.eval(currentNode,
xpathnode, str,prefixResolver);
if (includeInResult.bool())
return 1;
return 0;
} catch (TransformerException e) {
Object[] eArgs = {currentNode};
throw new XMLSecurityRuntimeException
("signature.Transform.node", eArgs, e);
} catch (Exception e) {
Object[] eArgs = {currentNode, new Short(currentNode.getNodeType())};
throw new XMLSecurityRuntimeException
("signature.Transform.nodeAndType",eArgs, e);
}
}
public int isNodeIncludeDO(Node n, int level) {
return isNodeInclude(n);
}
}
}