public int runXPath()

in taverna-xpath-activity-ui/src/main/java/org/apache/taverna/activities/xpath/ui/config/XPathActivityConfigurationPanel.java [1088:1168]
69 lines of code
9 McCabe index (conditional complexity)

	public int runXPath(boolean displayResults) {
		// ----- RUNNING THE XPath EXPRESSION -----
		XPath expr = null;
		try {
			expr = DocumentHelper.createXPath(this.tfXPathExpression.getText());
			expr.setNamespaceURIs(this.xpathNamespaceMap);
		} catch (InvalidXPathException e) {
			if (displayResults) {
				JOptionPane
						.showMessageDialog(
								thisPanel,
								"Incorrect XPath Expression\n\n"
										+ "Please check the expression if you have manually modified it;\n"
										+ "Alternatively, try to select another node from the XML tree.\n\n"
										+ "------------------------------------------------------------------------------------\n\n"
										+ "XPath processing library reported the following error:\n"
										+ e.getMessage(), "XPath Activity",
								JOptionPane.ERROR_MESSAGE);
			}
			return (-1);
		}

		Document doc = xmlTree.getDocumentUsedToPopulateTree();
		List<Node> matchingNodes = null;
		int matchingNodeCount = -1;
		try {
			matchingNodes = expr.selectNodes(doc);
			matchingNodeCount = matchingNodes.size();
		} catch (XPathException e) {
			if (displayResults) {
				JOptionPane
						.showMessageDialog(
								thisPanel,
								"Unexpected error has occurred while executing the XPath expression.\n\n"
										+ "If you have manually modified the XPath expression and/or namespace mappings,\n"
										+ "please check you changes. Alternatively, make your selection in the XML tree and\n"
										+ "a correct XPath expression with corresponding namespace mapping will be generated.\n\n"
										+ "-------------------------------------------------------------------------------------------------------------\n\n"
										+ "XPath processing library reported the following error:\n"
										+ e.getMessage(), "XPath Activity",
								JOptionPane.ERROR_MESSAGE);
			}
			return (-1);
		}

		// ----- DISPLAYING THE RESULTS -----
		if (displayResults) {
			tfExecutedXPathExpression.setText(expr.getText());
			tfMatchingElementCount.setText("" + matchingNodeCount);

			StringBuffer outNodesText = new StringBuffer();
			StringBuffer outNodesXML = new StringBuffer();
			for (Node n : matchingNodes) {
				if (n.getStringValue() != null
						&& n.getStringValue().length() > 0) {
					outNodesText.append(n.getStringValue() + "\n");
				}
				outNodesXML.append(n.asXML() + "\n");
			}

			// tpExecutedXPathExpressionResults.setSelectedIndex(0); // open the
			// first tab (should be the one with textual results) // TODO -
			// enable if needed

			taExecutedXPathExpressionResultsAsText.setText(outNodesText
					.toString());
			taExecutedXPathExpressionResultsAsText.setBackground(Color.WHITE);
			taExecutedXPathExpressionResultsAsText.setCaretPosition(0);
			spExecutedXPathExpressionResultsAsText.setBorder(BorderFactory
					.createLineBorder(Color.WHITE, 3));

			taExecutedXPathExpressionResultsAsXML.setText(outNodesXML
					.toString());
			taExecutedXPathExpressionResultsAsXML.setBackground(Color.WHITE);
			taExecutedXPathExpressionResultsAsXML.setCaretPosition(0);
			spExecutedXPathExpressionResultsAsXML.setBorder(BorderFactory
					.createLineBorder(Color.WHITE, 3));
		}

		return (matchingNodeCount);
	}