diff options
Diffstat (limited to 'spss.server/src/at/gv/egovernment/moa/spss/server/iaik/xml/XSLTTransformationImpl.java')
-rw-r--r-- | spss.server/src/at/gv/egovernment/moa/spss/server/iaik/xml/XSLTTransformationImpl.java | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/spss.server/src/at/gv/egovernment/moa/spss/server/iaik/xml/XSLTTransformationImpl.java b/spss.server/src/at/gv/egovernment/moa/spss/server/iaik/xml/XSLTTransformationImpl.java deleted file mode 100644 index d38da650b..000000000 --- a/spss.server/src/at/gv/egovernment/moa/spss/server/iaik/xml/XSLTTransformationImpl.java +++ /dev/null @@ -1,168 +0,0 @@ -package at.gv.egovernment.moa.spss.server.iaik.xml; - -import java.io.IOException; -import java.io.InputStream; -import java.util.Collections; - -import org.w3c.dom.Element; -import org.w3c.dom.NodeList; - -import iaik.ixsil.algorithms.CanonicalizationAlgorithm; -import iaik.ixsil.algorithms.CanonicalizationAlgorithmImplExclusiveCanonicalXML; -import iaik.ixsil.exceptions.AlgorithmException; -import iaik.server.modules.xml.XSLTTransformation; - -import at.gv.egovernment.moa.util.NodeListAdapter; -import at.gv.egovernment.moa.util.StreamUtils; -import at.gv.egovernment.moa.util.XPathException; -import at.gv.egovernment.moa.util.XPathUtils; - - -/** - * A <code>Transformation</code> containing an XSLT transformation. - * - * @author Patrick Peck - * @version $Id$ - */ -public class XSLTTransformationImpl - extends TransformationImpl - implements XSLTTransformation { - - /** The XSLT stylesheet. */ - private Element styleSheetElement; - /** The hash code of the canonicalized stylesheet. If calculated, this value - * should be != 0. */ - private int hashCode; - - /** - * Create a new <code>XSLTTransformationImpl</code> object. - * - * @param styleSheetElement The XSLT stylesheet element. - */ - public XSLTTransformationImpl(Element styleSheetElement) { - setAlgorithmURI(XSLTTransformation.XSLT); - setStyleSheetElement(styleSheetElement); - } - - /** - * Set the XSLT stylesheet element. - * - * @param styleSheetElement The XSLT stylesheet element to set. - */ - protected void setStyleSheetElement(Element styleSheetElement) { - this.styleSheetElement = styleSheetElement; - this.hashCode = 0; - } - - /** - * @see iaik.server.modules.xml.XSLTTransformation#getStylesheetElement() - */ - public Element getStylesheetElement() { - return styleSheetElement; - } - - /** - * Compare this <code>XSLTTransformation</code> to another. - * - * @param other The object to compare this - * <code>XSLTTransformation</code> to. - * @return <code>true</code>, if <code>other</code> is an - * <code>XSLTTransformation</code> and if the canonicalized representations of - * the stylesheets contained in <code>this</code> and <code>other</code> - * match. Otherwise, <code>false</code> is returned. - * @see java.lang.Object#equals(Object) - */ - public boolean equals(Object other) { - if (other instanceof XSLTTransformation) { - XSLTTransformation xslt = (XSLTTransformation) other; - - return compareElements( - getStylesheetElement(), - xslt.getStylesheetElement()); - } - return false; - } - - /** - * @see java.lang.Object#hashCode() - */ - public int hashCode() { - if (hashCode == 0) { - hashCode = calculateHashCode(getStylesheetElement()); - } - return hashCode; - } - - /** - * Calculate the hash code for a DOM element by canonicalizing it. - * - * @param element The DOM element for which the hash code is to be calculated. - * @return int The hash code, or <code>0</code>, if it could not be - * calculated. - */ - private static int calculateHashCode(Element element) { - try { - InputStream is = canonicalize(element); - byte[] buf = new byte[256]; - int hashCode = 1; - int length; - int i; - - while ((length = is.read(buf)) > 0) { - for (i = 0; i < length; i++) { - hashCode += buf[i] * 31 + i; - } - } - is.close(); - return hashCode; - } catch (AlgorithmException e) { - return 0; - } catch (IOException e) { - return 0; - } - } - - /** - * Compare two DOM elements by canonicalizing their contents and comparing the - * resulting byte stream. - * - * @param elem1 The 1st element to compare. - * @param elem2 The 2nd element to compare. - * @return boolean <code>true</code>, if the elements are considered equal - * after canonicalization. Otherwise <code>false</code> is returned. - */ - private static boolean compareElements(Element elem1, Element elem2) { - try { - InputStream is1 = canonicalize(elem1); - InputStream is2 = canonicalize(elem2); - return StreamUtils.compareStreams(is1, is2); - } catch (AlgorithmException e) { - return false; - } catch (IOException e) { - return false; - } - } - - /** - * Canonicalize a DOM element. - * - * @param element The element to canonicalize. - * @return InputStream A stream with the canonicalized data. - * @throws AlgorithmException An error occurred canonicalizing the element. - */ - private static InputStream canonicalize(Element element) - throws AlgorithmException { - CanonicalizationAlgorithm c14n = - new CanonicalizationAlgorithmImplExclusiveCanonicalXML(); - NodeList nodeList; - - try { - nodeList = XPathUtils.selectNodeList(element, XPathUtils.ALL_NODES_XPATH); - } catch (XPathException e) { - nodeList = new NodeListAdapter(Collections.EMPTY_LIST); - } - c14n.setInput(nodeList); - return c14n.canonicalize(); - } - -} |