/**
 * Gets the target language of the XLIFF by looking at the first "file" 
 * element.
 *
 * @param xliffContent xliff content from which to extract the target language
 * @return the target language or {@code null} if not found
 */
public String getTargetLanguage(String xliffContent) {

    String targetLanguage = null;

    InputSource inputSource = new InputSource(new StringReader(xliffContent));
    XPath xPath = XPathFactory.newInstance().newXPath();
    
    SimpleNamespaceContext simpleNamespaceContext = new SimpleNamespaceContext();
    simpleNamespaceContext.bindNamespaceUri("xlf", "urn:oasis:names:tc:xliff:document:1.2");
    xPath.setNamespaceContext(simpleNamespaceContext);
    
    try {
        Node node = (Node) xPath.evaluate("/xlf:xliff/xlf:file[1]/@target-language", inputSource, XPathConstants.NODE);
        
        if(node != null) {
            targetLanguage = node.getTextContent();
        }
        
    } catch (XPathExpressionException xpee) {
        logger.debug("Can't extract target language from xliff", xpee);
    }
    return targetLanguage;
}
 

@Override
public <T> T translate(Node node, T value, TestContext context) {
    for (Map.Entry<String, String> expressionEntry : mappings.entrySet()) {
        String expression = expressionEntry.getKey();

        SimpleNamespaceContext namespaceContext = new SimpleNamespaceContext();
        namespaceContext.setBindings(context.getNamespaceContextBuilder().getNamespaceMappings());

        NodeList findings = (NodeList) XPathUtils.evaluateExpression(node.getOwnerDocument(), expression, namespaceContext, XPathConstants.NODESET);

        if (findings != null && containsNode(findings, node)) {
            return convertIfNecessary(context.replaceDynamicContentInString(expressionEntry.getValue()), value);
        }
    }

    return value;
}
 

private static XPathExpression compileXpathExpression(String expression,
		@Nullable Map<String, String> namespaces) throws XPathExpressionException {

	SimpleNamespaceContext namespaceContext = new SimpleNamespaceContext();
	namespaceContext.setBindings(namespaces != null ? namespaces : Collections.emptyMap());
	XPath xpath = XPathFactory.newInstance().newXPath();
	xpath.setNamespaceContext(namespaceContext);
	return xpath.compile(expression);
}
 

private static XPathExpression compileXpathExpression(String expression,
		@Nullable Map<String, String> namespaces) throws XPathExpressionException {

	SimpleNamespaceContext namespaceContext = new SimpleNamespaceContext();
	namespaceContext.setBindings(namespaces != null ? namespaces : Collections.emptyMap());
	XPath xpath = XPathFactory.newInstance().newXPath();
	xpath.setNamespaceContext(namespaceContext);
	return xpath.compile(expression);
}
 

private XPathExpression compileXpathExpression(String expression, Map<String, String> namespaces)
		throws XPathExpressionException {

	SimpleNamespaceContext namespaceContext = new SimpleNamespaceContext();
	namespaceContext.setBindings((namespaces != null) ? namespaces : Collections.<String, String> emptyMap());
	XPath xpath = XPathFactory.newInstance().newXPath();
	xpath.setNamespaceContext(namespaceContext);
	return xpath.compile(expression);
}
 

/**
 * Get the Citrus modules for this project based on the build dependencies.
 * @return
 */
public List<Module> getModules() {
    List<Module> modules = new ArrayList<>();
    Collection<String> allModules = new SpringBeanNamespacePrefixMapper().getNamespaceMappings().values();

    if (project.isMavenProject()) {
        try {
            String pomXml = FileUtils.readToString(new FileSystemResource(project.getMavenPomFile()));
            SimpleNamespaceContext nsContext = new SimpleNamespaceContext();
            nsContext.bindNamespaceUri("mvn", "http://maven.apache.org/POM/4.0.0");

            Document pomDoc = XMLUtils.parseMessagePayload(pomXml);

            NodeList dependencies = XPathUtils.evaluateAsNodeList(pomDoc, "/mvn:project/mvn:dependencies/mvn:dependency/mvn:artifactId[starts-with(., 'citrus-')]", nsContext);

            for (int i = 0; i < dependencies.getLength(); i++) {
                String moduleName = DomUtils.getTextValue((Element) dependencies.item(i));

                if (moduleName.equals("citrus-core")) {
                    allModules.remove("citrus");
                } else {
                    allModules.remove(moduleName);
                }

                modules.add(new Module(moduleName.substring("citrus-".length()), project.getVersion(), true));
            }
        } catch (IOException e) {
            throw new ApplicationRuntimeException("Unable to open Maven pom.xml file", e);
        }
    }

    allModules.stream()
            .filter(name -> !name.equals("citrus-test"))
            .map(name -> name.equals("citrus") ? "citrus-core" : name)
            .map(name -> new Module(name.substring("citrus-".length()), project.getVersion(), false))
            .forEach(modules::add);

    return modules;
}
 

/**
 * Evaluates Xpath expression on document and returns null safe result value as String representation.
 * @param document
 * @param expression
 * @param nsContext
 * @return
 */
private String evaluate(Document document, String expression, SimpleNamespaceContext nsContext) {
    Object result = XPathUtils.evaluateExpression(document, expression, nsContext, XPathConstants.STRING);
    return result != null ? result.toString() : "";
}