List of usage examples for org.dom4j Text appendText
void appendText(String text);
From source file:org.orbeon.oxf.processor.sql.SQLProcessor.java
License:Open Source License
protected void execute(final PipelineContext context, XMLReceiver xmlReceiver) { try {// w w w .j a v a 2 s.co m // Cache, read and interpret the config input Config config = readCacheInputAsObject(context, getInputByName(INPUT_CONFIG), new CacheableInputReader<Config>() { public Config read(PipelineContext context, ProcessorInput input) { // Read the config input document Node config = readInputAsDOM4J(context, input); Document configDocument = config.getDocument(); // Extract XPath expressions and also check whether any XPath expression is used at all // NOTE: This could be done through streaming below as well // NOTE: For now, just match <sql:param select="/*" type="xs:base64Binary"/> List xpathExpressions = new ArrayList(); boolean useXPathExpressions = false; for (Iterator i = XPathUtils.selectIterator(configDocument, "//*[namespace-uri() = '" + SQL_NAMESPACE_URI + "' and @select]"); i .hasNext();) { Element element = (Element) i.next(); useXPathExpressions = true; String typeAttribute = element.attributeValue("type"); if ("xs:base64Binary".equals(typeAttribute)) { String selectAttribute = element.attributeValue("select"); xpathExpressions.add(selectAttribute); } } // Normalize spaces. What this does is to coalesce adjacent text nodes, and to remove // resulting empty text, unless the text is contained within a sql:text element. configDocument.accept(new VisitorSupport() { private boolean endTextSequence(Element element, Text previousText) { if (previousText != null) { String value = previousText.getText(); if (value == null || value.trim().equals("")) { element.remove(previousText); return true; } } return false; } @Override public void visit(Element element) { // Don't touch text within sql:text elements if (!SQL_NAMESPACE_URI.equals(element.getNamespaceURI()) || !"text".equals(element.getName())) { Text previousText = null; for (int i = 0, size = element.nodeCount(); i < size;) { Node node = element.node(i); if (node instanceof Text) { Text text = (Text) node; if (previousText != null) { previousText.appendText(text.getText()); element.remove(text); } else { String value = text.getText(); // Remove empty text nodes if (value == null || value.length() < 1) { element.remove(text); } else { previousText = text; i++; } } } else { if (!endTextSequence(element, previousText)) i++; previousText = null; } } endTextSequence(element, previousText); } } }); // Create SAXStore try { final SAXStore store = new SAXStore(); final LocationSAXWriter locationSAXWriter = new LocationSAXWriter(); locationSAXWriter.setContentHandler(store); locationSAXWriter.write(configDocument); // Return the normalized document return new Config(store, useXPathExpressions, xpathExpressions); } catch (SAXException e) { throw new OXFException(e); } } }); // Either read the whole input as a DOM, or try to serialize Node data = null; XPathXMLReceiver xpathReceiver = null; // Check if the data input is connected boolean hasDataInput = getConnectedInputs().get(INPUT_DATA) != null; if (!hasDataInput && config.useXPathExpressions) throw new OXFException( "The data input must be connected when the configuration uses XPath expressions."); if (!hasDataInput || !config.useXPathExpressions) { // Just use an empty document data = Dom4jUtils.NULL_DOCUMENT; } else { // There is a data input connected and there are some XPath expressions operating on it boolean useXPathContentHandler = false; if (config.xpathExpressions.size() > 0) { // Create XPath content handler final XPathXMLReceiver _xpathReceiver = new XPathXMLReceiver(); // Add expressions and check whether we can try to stream useXPathContentHandler = true; for (Iterator i = config.xpathExpressions.iterator(); i.hasNext();) { String expression = (String) i.next(); boolean canStream = _xpathReceiver.addExpresssion(expression, false);// FIXME: boolean nodeSet if (!canStream) { useXPathContentHandler = false; break; } } // Finish setting up the XPathContentHandler if (useXPathContentHandler) { _xpathReceiver.setReadInputCallback(new Runnable() { public void run() { readInputAsSAX(context, INPUT_DATA, _xpathReceiver); } }); xpathReceiver = _xpathReceiver; } } // If we can't stream, read everything in if (!useXPathContentHandler) data = readInputAsDOM4J(context, INPUT_DATA); } // Try to read datasource input if any Datasource datasource = null; { List datasourceInputs = (List) getConnectedInputs().get(INPUT_DATASOURCE); if (datasourceInputs != null) { if (datasourceInputs.size() > 1) throw new OXFException("At most one one datasource input can be connected."); ProcessorInput datasourceInput = (ProcessorInput) datasourceInputs.get(0); datasource = Datasource.getDatasource(context, this, datasourceInput); } } // Replay the config SAX store through the interpreter config.configInput.replay( new RootInterpreter(context, getPropertySet(), data, datasource, xpathReceiver, xmlReceiver)); } catch (OXFException e) { throw e; } catch (Exception e) { throw new OXFException(e); } }