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Diffstat (limited to 'moaSig/moa-sig/src/main/java/at/gv/egovernment/moa/spss/server/webservice/binding/TransformParser.java')
| -rw-r--r-- | moaSig/moa-sig/src/main/java/at/gv/egovernment/moa/spss/server/webservice/binding/TransformParser.java | 363 |
1 files changed, 363 insertions, 0 deletions
diff --git a/moaSig/moa-sig/src/main/java/at/gv/egovernment/moa/spss/server/webservice/binding/TransformParser.java b/moaSig/moa-sig/src/main/java/at/gv/egovernment/moa/spss/server/webservice/binding/TransformParser.java new file mode 100644 index 0000000..cd10260 --- /dev/null +++ b/moaSig/moa-sig/src/main/java/at/gv/egovernment/moa/spss/server/webservice/binding/TransformParser.java @@ -0,0 +1,363 @@ +/* + * Copyright 2003 Federal Chancellery Austria + * MOA-SPSS has been developed in a cooperation between BRZ, the Federal + * Chancellery Austria - ICT staff unit, and Graz University of Technology. + * + * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by + * the European Commission - subsequent versions of the EUPL (the "Licence"); + * You may not use this work except in compliance with the Licence. + * You may obtain a copy of the Licence at: + * http://www.osor.eu/eupl/ + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the Licence is distributed on an "AS IS" basis, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the Licence for the specific language governing permissions and + * limitations under the Licence. + * + * This product combines work with different licenses. See the "NOTICE" text + * file for details on the various modules and licenses. + * The "NOTICE" text file is part of the distribution. Any derivative works + * that you distribute must include a readable copy of the "NOTICE" text file. + */ + +package at.gv.egovernment.moa.spss.server.webservice.binding; + +import java.io.ByteArrayInputStream; +import java.io.IOException; +import java.io.Serializable; +import java.io.StringBufferInputStream; +import java.util.ArrayList; +import java.util.HashMap; +import java.util.Iterator; +import java.util.List; +import java.util.Map; +import java.util.StringTokenizer; + +import javax.xml.bind.JAXBElement; +import javax.xml.parsers.DocumentBuilder; +import javax.xml.parsers.DocumentBuilderFactory; +import javax.xml.parsers.ParserConfigurationException; + +import org.w3c.dom.Element; +import org.w3c.dom.traversal.NodeIterator; +import org.xml.sax.SAXException; + +import at.gv.egiz.moasig.MoaTransformType; +import at.gv.egiz.moasig.MoaTransformsType; +import at.gv.egovernment.moa.spss.MOAApplicationException; +import at.gv.egovernment.moa.spss.api.SPSSFactory; +import at.gv.egovernment.moa.spss.api.common.Base64Transform; +import at.gv.egovernment.moa.spss.api.common.CanonicalizationTransform; +import at.gv.egovernment.moa.spss.api.common.EnvelopedSignatureTransform; +import at.gv.egovernment.moa.spss.api.common.ExclusiveCanonicalizationTransform; +import at.gv.egovernment.moa.spss.api.common.Transform; +import at.gv.egovernment.moa.spss.api.common.XPathFilter; +import at.gv.egovernment.moa.spss.api.common.XPathFilter2Transform; +import at.gv.egovernment.moa.spss.api.common.XPathTransform; +import at.gv.egovernment.moa.spss.api.common.XSLTTransform; +import at.gv.egovernment.moa.util.Constants; +import at.gv.egovernment.moa.util.DOMUtils; +import at.gv.egovernment.moa.util.XPathUtils; + +/** + * A parser to parse XMLDsig <code>Transform</code> DOM elements into their MOA + * SPSS API representation. + * + * @author Patrick Peck + * @version $Id$ + */ +public class TransformParser { + // + // XPath expressions for selecting information from the DOM tree + // + private static final String DSIG = Constants.DSIG_PREFIX + ":"; + private static final String DSIG_FILTER2 = Constants.DSIG_FILTER2_PREFIX + ":"; + private static final String XSLT = Constants.XSLT_PREFIX + ":"; + private static final String EC = Constants.DSIG_EC_PREFIX + ":"; + private static final String TRANSFORM_XPATH = DSIG + "Transform"; + private static final String XPATH_XPATH = DSIG + "XPath"; + private static final String XSLT_ELEMENT_XPATH = XSLT + "stylesheet"; + private static final String XPATH2_XPATH = (DSIG_FILTER2 + "XPath[@Filter=\"intersect\"] | ") + + (DSIG_FILTER2 + "XPath[@Filter=\"subtract\"] | ") + (DSIG_FILTER2 + "XPath[@Filter=\"union\"]"); + private static final String INCLUSIVE_NAMESPACES_XPATH = EC + "InclusiveNamespaces"; + + /** + * The <code>SPSSFactory</code> to use for creating new API objects. + */ + private SPSSFactory factory = SPSSFactory.getInstance(); + + /** + * Parse an XMLDsig <code>Transforms</code> DOM element. + * + * @param transformsElem + * The <code>Transforms</code> DOM element to parse. + * @return A <code>List</code> of <code>Transform</code> API objects + * containing the data from the individual <code>Transform</code> + * DOM elements. + * @throws MOAApplicationException + * An error occurred parsing the <code>Transforms</code> DOM + * element. + */ + public List parseTransforms(MoaTransformsType moaTransformsType) throws MOAApplicationException { + List transforms = new ArrayList(); + if (moaTransformsType.getMoaTransform() != null) { + Iterator<MoaTransformType> transformIterator = moaTransformsType.getMoaTransform().iterator(); + + while (transformIterator.hasNext()) { + MoaTransformType transformType = transformIterator.next(); + Transform transform = parseTransform(transformType); + transforms.add(transform); + } + } + return transforms; + } + + /** + * Parse an XMLDsig <code>Transform</code> DOM element. + * + * @param transformElem + * <code>Transform</code> DOM element to parse. + * @return The <code>Transform</code> API object containing the data from + * the <code>Transform</code> DOM element. + * @throws MOAApplicationException + * An error occurred parsing the <code>Transform</code> DOM + * element. + */ + public Transform parseTransform(MoaTransformType transformType) throws MOAApplicationException { + + String algorithmUri = transformType.getAlgorithm();// transformElem.getAttribute("Algorithm"); + + if (CanonicalizationTransform.CANONICAL_XML.equals(algorithmUri) + || CanonicalizationTransform.CANONICAL_XML_WITH_COMMENTS.equals(algorithmUri)) { + return factory.createCanonicalizationTransform(algorithmUri); + } else if (ExclusiveCanonicalizationTransform.EXCLUSIVE_CANONICAL_XML.equals(algorithmUri) + || ExclusiveCanonicalizationTransform.EXCLUSIVE_CANONICAL_XML_WITH_COMMENTS.equals(algorithmUri)) { + return parseExclusiveC14nTransform(algorithmUri, transformType); + } else if (Base64Transform.BASE64_DECODING.equals(algorithmUri)) { + return factory.createBase64Transform(); + } else if (EnvelopedSignatureTransform.ENVELOPED_SIGNATURE.equals(algorithmUri)) { + return factory.createEnvelopedSignatureTransform(); + } else if (XPathTransform.XPATH.equals(algorithmUri)) { + return parseXPathTransform(transformType); + } else if (XPathFilter2Transform.XPATH_FILTER2.equals(algorithmUri)) { + return parseXPathFilter2Transform(transformType); + } else if (XSLTTransform.XSLT.equals(algorithmUri)) { + return parseXSLTTransform(transformType); + } else { + throw new MOAApplicationException("1108", new Object[] { algorithmUri }); + } + } + + private List<byte[]> getDataObjectFromMoaTransform(MoaTransformType transformType) { + Iterator<Serializable> objectsIterator = transformType.getContent().iterator(); + List<byte[]> dataObjects = new ArrayList<byte[]>(); + while (objectsIterator.hasNext()) { + Serializable serializable = objectsIterator.next(); + if (serializable instanceof JAXBElement<?>) { + JAXBElement<?> jaxb = (JAXBElement<?>) serializable; + if (jaxb.getDeclaredType() == byte[].class) { + JAXBElement<byte[]> jaxbString = (JAXBElement<byte[]>) serializable; + dataObjects.add(jaxbString.getValue()); + } + } + } + return dataObjects; + } + + private List<String> getStringFromMoaTransform(MoaTransformType transformType) { + Iterator<Serializable> objectsIterator = transformType.getContent().iterator(); + List<String> dataObjects = new ArrayList<String>(); + while (objectsIterator.hasNext()) { + Serializable serializable = objectsIterator.next(); + if (serializable instanceof JAXBElement<?>) { + JAXBElement<?> jaxb = (JAXBElement<?>) serializable; + if (jaxb.getDeclaredType() == String.class) { + JAXBElement<String> jaxbString = (JAXBElement<String>) serializable; + dataObjects.add(jaxbString.getValue()); + } + } else if (serializable instanceof String) { + dataObjects.add((String) serializable); + } + } + return dataObjects; + } + + /** + * Parse an exclusive canonicalization type of transform. + * + * @param algorithmUri + * The algorithm URI of the canonicalization algorithm. + * @param transformElem + * The <code>Transform</code> DOM element to parse. + * @return An <code>ExclusiveCanonicalizationTransform</code> API object + * containing the data from the <code>transformElem</code>. + * @throws MOAApplicationException + */ + private Transform parseExclusiveC14nTransform(String algorithmUri, MoaTransformType transformType) + throws MOAApplicationException { + List<byte[]> data = getDataObjectFromMoaTransform(transformType); + List inclusiveNamespaces = new ArrayList(); + Iterator<byte[]> dataIterator = data.iterator(); + while (dataIterator.hasNext()) { + byte[] dataObject = dataIterator.next(); + Element transform; + try { + transform = DOMUtils.parseXmlNonValidating(new ByteArrayInputStream(dataObject)); + } catch (ParserConfigurationException e) { + throw new MOAApplicationException("failed to parse transform element", null, e); + } catch (SAXException e) { + throw new MOAApplicationException("failed to parse transform element", null, e); + } catch (IOException e) { + throw new MOAApplicationException("failed to parse transform element", null, e); + } + + Element inclusiveNamespacesElem = (Element) XPathUtils.selectSingleNode(transform, + INCLUSIVE_NAMESPACES_XPATH); + + if (inclusiveNamespacesElem != null) { + StringTokenizer tokenizer = new StringTokenizer(inclusiveNamespacesElem.getAttribute("PrefixList")); + while (tokenizer.hasMoreTokens()) { + inclusiveNamespaces.add(tokenizer.nextToken()); + } + } + } + return factory.createExclusiveCanonicalizationTransform(algorithmUri, inclusiveNamespaces); + } + + /** + * Parse an <code>XPath</code> type of <code>Transform</code>. + * + * @param transformElem + * The <code>Transform</code> DOM element to parse. + * @return The <code>Transform</code> API object representation of the + * <code>Transform</code> DOM element. + * @throws MOAApplicationException + * An error occurred parsing the <code>Transform</code> DOM + * element. + */ + private Transform parseXPathTransform(MoaTransformType transformType) throws MOAApplicationException { + // TODO: XPATH Namespace Declarations + List<String> xPathTransforms = getStringFromMoaTransform(transformType); + Map nsDecls; + if (xPathTransforms.isEmpty()) { + throw new MOAApplicationException("2202", null); + } + nsDecls = new HashMap(); + return factory.createXPathTransform(xPathTransforms.get(0), nsDecls); + /* + * Element xPathElem = (Element) + * XPathUtils.selectSingleNode(transformElem, XPATH_XPATH); + * + * + * if (xPathElem == null) { throw new MOAApplicationException("2202", + * null); } + * + * nsDecls = DOMUtils.getNamespaceDeclarations(xPathElem); + * nsDecls.remove(""); + * + * return factory.createXPathTransform(DOMUtils.getText(xPathElem), + * nsDecls); + */ + } + + /** + * Parse an <code>XPathFilter2</code> type of <code>Transform</code>. + * + * @param transformElem + * The <code>Transform</code> DOM element to parse. + * @return The <code>Transform</code> API object representation of the + * <code>Transform</code> DOM element. + * @throws MOAApplicationException + * An error occurred parsing the <code>Transform</code> DOM + * element. + */ + private Transform parseXPathFilter2Transform(MoaTransformType transformType) throws MOAApplicationException { + + List<byte[]> data = getDataObjectFromMoaTransform(transformType); + + List filters = new ArrayList(); + Iterator<byte[]> dataIterator = data.iterator(); + while (dataIterator.hasNext()) { + byte[] dataObject = dataIterator.next(); + Element transform; + try { + transform = DOMUtils.parseXmlNonValidating(new ByteArrayInputStream(dataObject)); + } catch (ParserConfigurationException e) { + throw new MOAApplicationException("failed to parse transform element", null, e); + } catch (SAXException e) { + throw new MOAApplicationException("failed to parse transform element", null, e); + } catch (IOException e) { + throw new MOAApplicationException("failed to parse transform element", null, e); + } + + NodeIterator iter = XPathUtils.selectNodeIterator(transform, XPATH2_XPATH); + Element filterElem; + + while ((filterElem = (Element) iter.nextNode()) != null) { + String filterAttr = filterElem.getAttribute("Filter"); + String filterType; + String expression; + Map nsDecls; + + if (filterAttr.equals("intersect")) { + filterType = XPathFilter.INTERSECT_TYPE; + } else if (filterAttr.equals("subtract")) { + filterType = XPathFilter.SUBTRACT_TYPE; + } else { + filterType = XPathFilter.UNION_TYPE; + } + + expression = DOMUtils.getText(filterElem); + nsDecls = DOMUtils.getNamespaceDeclarations(filterElem); + nsDecls.remove(""); + filters.add(factory.createXPathFilter(filterType, expression, nsDecls)); + } + } + if (filters.size() == 0) { + throw new MOAApplicationException("2216", null); + } + + return factory.createXPathFilter2Transform(filters); + } + + /** + * Parse an <code>XSLT</code> type of <code>Transform</code>. + * + * @param transformElem + * The <code>Transform</code> DOM element to parse. + * @return The <code>Transform</code> API object representation of the + * <code>Transform</code> DOM element. + * @throws MOAApplicationException + * An error occurred parsing the <code>Transform</code> DOM + * element. + */ + private Transform parseXSLTTransform(MoaTransformType transformType) throws MOAApplicationException { + List<byte[]> data = getDataObjectFromMoaTransform(transformType); + + if (data.isEmpty()) { + throw new MOAApplicationException("2215", null); + } + + byte[] dataObject = data.get(0); + Element transform; + try { + transform = DOMUtils.parseXmlNonValidating(new ByteArrayInputStream(dataObject)); + } catch (ParserConfigurationException e) { + throw new MOAApplicationException("failed to parse transform element", null, e); + } catch (SAXException e) { + throw new MOAApplicationException("failed to parse transform element", null, e); + } catch (IOException e) { + throw new MOAApplicationException("failed to parse transform element", null, e); + } + + Element xsltElem = (Element) XPathUtils.selectSingleNode(transform, XSLT_ELEMENT_XPATH); + + if (xsltElem == null) { + + } + + return factory.createXSLTTransform(xsltElem); + } + +} |