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+/*
+ * 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.invoke;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+import iaik.server.modules.xml.Base64Transformation;
+import iaik.server.modules.xml.Canonicalization;
+import iaik.server.modules.xml.EnvelopedSignatureTransformation;
+import iaik.server.modules.xml.Transformation;
+import iaik.server.modules.xml.XPath2Transformation;
+import iaik.server.modules.xml.XPathTransformation;
+import iaik.server.modules.xml.XSLTTransformation;
+
+import at.gv.egovernment.moa.spss.MOAApplicationException;
+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.spss.server.iaik.xml.Base64TransformationImpl;
+import at.gv.egovernment.moa.spss.server.iaik.xml.CanonicalizationImpl;
+import at.gv.egovernment.moa.spss.server.iaik.xml.EnvelopedSignatureTransformationImpl;
+import at.gv.egovernment.moa.spss.server.iaik.xml.ExclusiveCanonicalizationImpl;
+import at.gv.egovernment.moa.spss.server.iaik.xml.XPath2FilterImpl;
+import at.gv.egovernment.moa.spss.server.iaik.xml.XPath2TransformationImpl;
+import at.gv.egovernment.moa.spss.server.iaik.xml.XPathTransformationImpl;
+import at.gv.egovernment.moa.spss.server.iaik.xml.XSLTTransformationImpl;
+
+/**
+ * A factory to create <code>Transformation</code> objects from
+ * <code>Transform</code> objects.
+ *
+ * @author Patrick Peck
+ * @version $Id$
+ */
+public class TransformationFactory {
+
+
+ /** The single instance of this class. */
+ private static TransformationFactory instance = null;
+
+ /** Maps <code>XPathFilter</code> filter types to
+ * <code>XPath2Transformation</code> filter types. */
+ private static Map FILTER_TYPE_MAPPING;
+
+ static {
+ FILTER_TYPE_MAPPING = new HashMap();
+
+ FILTER_TYPE_MAPPING.put(
+ XPathFilter.INTERSECT_TYPE,
+ XPath2Transformation.XPath2Filter.INTERSECTION);
+ FILTER_TYPE_MAPPING.put(
+ XPathFilter.SUBTRACT_TYPE,
+ XPath2Transformation.XPath2Filter.SUBTRACTION);
+ FILTER_TYPE_MAPPING.put(
+ XPathFilter.UNION_TYPE,
+ XPath2Transformation.XPath2Filter.UNION);
+ }
+
+ /**
+ * Get the single instance of the factory.
+ *
+ * @return TransformationFactory The single instance.
+ */
+ public static synchronized TransformationFactory getInstance() {
+ if (instance == null) {
+ instance = new TransformationFactory();
+ }
+ return instance;
+ }
+
+ /**
+ * Create a new <code>TransformationFactory</code>.
+ *
+ * Protected to disallow multiple instances.
+ */
+ protected TransformationFactory() {
+ }
+
+ /**
+ * Create a <code>Transformation</code> based on a
+ * <code>Transform</code> object.
+ *
+ * @param transform The <code>Transform</code> object to extract
+ * transformation data from.
+ * @return The transformation contained in the <code>transform</code>
+ * object.
+ * @throws MOAApplicationException An error occured creating the
+ * <code>Transformation</code>. See exception message for details.
+ */
+ public Transformation createTransformation(Transform transform)
+ throws MOAApplicationException {
+ String algorithmUri = transform.getAlgorithmURI();
+
+ if (Canonicalization.CANONICAL_XML.equals(algorithmUri)
+ || Canonicalization.CANONICAL_XML_WITH_COMMENTS.equals(algorithmUri)) {
+ return createC14nTransformation(algorithmUri);
+ } else if (
+ Canonicalization.EXCLUSIVE_CANONICAL_XML.equals(algorithmUri)
+ || Canonicalization.EXCLUSIVE_CANONICAL_XML_WITH_COMMENTS.equals(
+ algorithmUri)) {
+
+ return createExclusiveC14nTransformation(
+ (ExclusiveCanonicalizationTransform) transform);
+
+ } else if (Base64Transformation.ALL.contains(algorithmUri)) {
+ return createBase64Transformation();
+ } else if (EnvelopedSignatureTransformation.ALL.contains(algorithmUri)) {
+ return createEnvelopedSignatureTransformation();
+ } else if (XPathTransformation.ALL.contains(algorithmUri)) {
+ return createXPathTransformation((XPathTransform) transform);
+ } else if (XPath2Transformation.ALL.contains(algorithmUri)) {
+ return createXPath2Transformation((XPathFilter2Transform) transform);
+ } else if (XSLTTransformation.ALL.contains(algorithmUri)) {
+ return createXSLTTransformation((XSLTTransform) transform);
+ } else {
+ throw new MOAApplicationException("1108", new Object[] { algorithmUri });
+ }
+ }
+
+ /**
+ * Create a <code>List</code> of <code>Transformation</code>s from a
+ * <code>List</code> of <code>Transform</code>s.
+ *
+ * @param transforms The <code>List</code> containing the
+ * <code>Transform</code>s.
+ * @return The <code>List</code> of <code>Transformation</code>s corresponding
+ * to the <code>transforms</code>.
+ * @throws MOAApplicationException An error occurred building one of the
+ * transformations. See exception message for details.
+ */
+ public List createTransformationList(List transforms)
+ throws MOAApplicationException {
+ List transformationList = new ArrayList();
+ Iterator trIter;
+
+ for (trIter = transforms.iterator(); trIter.hasNext();) {
+ Transform transform = (Transform) trIter.next();
+ transformationList.add(createTransformation(transform));
+ }
+
+ return transformationList;
+ }
+
+ /**
+ * Create a <code>Canonicalization</code>.
+ *
+ * @param algorithmUri The algorithm URI of the canonicalization.
+ * @return The <code>Canonicalization</code>.
+ */
+ private Transformation createC14nTransformation(String algorithmUri) {
+ return new CanonicalizationImpl(algorithmUri);
+ }
+
+ /**
+ * Create a <code>ExclusiveCanonicalization</code>.
+ *
+ * @param transform The <code>ExclusiveCanonicalizationTransform</code>
+ * containing the transformation data.
+ * @return The <code>ExclusiveCanonicalization</code>.
+ */
+ private Transformation createExclusiveC14nTransformation(ExclusiveCanonicalizationTransform transform) {
+ return new ExclusiveCanonicalizationImpl(
+ transform.getAlgorithmURI(),
+ transform.getInclusiveNamespacePrefixes());
+ }
+
+ /**
+ * Create a <code>Base64Transformation</code>.
+ *
+ * @return The <code></code>
+ */
+ private Transformation createBase64Transformation() {
+ return new Base64TransformationImpl();
+ }
+
+ /**
+ * Create an <code>EnvelopedSignatureTransformation</code>.
+ *
+ * @return An <code>EnvelopedSignatureTransformation</code>.
+ */
+ private Transformation createEnvelopedSignatureTransformation() {
+ return new EnvelopedSignatureTransformationImpl();
+ }
+
+ /**
+ * Create an <code>XPathTransformation</code>.
+ *
+ * @param transform The <code>Transform</code> object containing the
+ * XPath transformation.
+ * @return An <code>XPathTransformation</code> corresponding the
+ * transformation given in <code>transform</code>.
+ * @throws MOAApplicationException An error occurred creating the
+ * <code>Transformation</code>.
+ */
+ private Transformation createXPathTransformation(XPathTransform transform)
+ throws MOAApplicationException {
+
+ return new XPathTransformationImpl(
+ transform.getXPathExpression(),
+ transform.getNamespaceDeclarations());
+ }
+
+ /**
+ * Create an <code>XPath2Transformation</code>.
+ *
+ * @param transform The <code>Transform</code> object containing the
+ * XPath filter transformation.
+ * @return An <code>XPath2Transformation</code> corresponding the
+ * transformation given in <code>transform</code>.
+ * @throws MOAApplicationException An error occurred creating the
+ * <code>Transformation</code>.
+ */
+ private Transformation createXPath2Transformation(XPathFilter2Transform transform)
+ throws MOAApplicationException {
+
+ XPath2TransformationImpl xpath2 = new XPath2TransformationImpl();
+ Iterator iter;
+
+ for (iter = transform.getFilters().iterator(); iter.hasNext();) {
+ XPathFilter filter = (XPathFilter) iter.next();
+ String mappedFilterType =
+ (String) FILTER_TYPE_MAPPING.get(filter.getFilterType());
+ XPath2FilterImpl mappedFilter =
+ new XPath2FilterImpl(
+ mappedFilterType,
+ filter.getXPathExpression(),
+ filter.getNamespaceDeclarations());
+ xpath2.addXPathFilter(mappedFilter);
+ }
+
+ if (xpath2.getXPathFilters().size() == 0) {
+ throw new MOAApplicationException("2216", null);
+ }
+
+ return xpath2;
+ }
+
+ /**
+ * Create an <code>XSLTTransformation</code>.
+ *
+ * @param transform The <code>Transform</code> containing the XSLT stylesheet.
+ * @return An <code>XSLTTransformation</code> corresponding the transformation
+ * given in <code>transform</code>.
+ * @throws MOAApplicationException An error occurred creating the
+ * <code>Transformation</code>.
+ */
+ private Transformation createXSLTTransformation(XSLTTransform transform)
+ throws MOAApplicationException {
+
+ return new XSLTTransformationImpl(transform.getStylesheet());
+ }
+
+}