Examples with XPathVariableResolver javax.xml.xpath.XPathVariableResolver used on opensource projects

Example 1 with XPathVariableResolver

use of javax.xml.xpath.XPathVariableResolver in project jstl-api by eclipse-ee4j.

the class JSTLNodeList method valueOf.

/**
 * Evaluate an XPath expression to a String value.
 */
public String valueOf(Node contextNode, String xpathString) throws JspTagException {
    // p("******** valueOf(" + n + ", " + xpathString + ")");
    XPathVariableResolver jxvr = new JSTLXPathVariableResolver(pageContext);
    XPath xpath = XPATH_FACTORY.newXPath();
    xpath.setNamespaceContext(jstlXPathNamespaceContext);
    xpath.setXPathVariableResolver(jxvr);
    try {
        return xpath.evaluate(xpathString, contextNode);
    } catch (XPathExpressionException ex) {
        throw new JspTagException(ex.toString(), ex);
    }
}

Example 2 with XPathVariableResolver

use of javax.xml.xpath.XPathVariableResolver in project jstl-api by eclipse-ee4j.

the class JSTLNodeList method selectSingleNode.

/**
 * Evaluate an XPath expression to a single node.
 */
public Node selectSingleNode(Node contextNode, String xpathString) throws JspTagException {
    // p("selectSingleNode of XPathUtil = passed node:" +
    // "xpathString => " + n + " : " + xpathString );
    XPathVariableResolver jxvr = new JSTLXPathVariableResolver(pageContext);
    try {
        XPath xpath = XPATH_FACTORY.newXPath();
        xpath.setNamespaceContext(jstlXPathNamespaceContext);
        xpath.setXPathVariableResolver(jxvr);
        return (Node) xpath.evaluate(xpathString, contextNode, XPathConstants.NODE);
    } catch (XPathExpressionException ex) {
        throw new JspTagException(ex.toString(), ex);
    }
}

Example 3 with XPathVariableResolver

use of javax.xml.xpath.XPathVariableResolver in project jstl-api by eclipse-ee4j.

the class JSTLNodeList method selectNodes.

/**
 * Evaluate an XPath expression to a List of nodes.
 */
public List<Node> selectNodes(Node contextNode, String xpathString) throws JspTagException {
    XPathVariableResolver jxvr = new JSTLXPathVariableResolver(pageContext);
    try {
        XPath xpath = XPATH_FACTORY.newXPath();
        xpath.setNamespaceContext(jstlXPathNamespaceContext);
        xpath.setXPathVariableResolver(jxvr);
        Object nl = xpath.evaluate(xpathString, contextNode, JSTLXPathConstants.OBJECT);
        return new JSTLNodeList(nl);
    } catch (XPathExpressionException ex) {
        throw new JspTagException(ex.toString(), ex);
    }
}

Example 4 with XPathVariableResolver

use of javax.xml.xpath.XPathVariableResolver in project jvarkit by lindenb.

the class VcfFilterXPath method doWork.

@Override
public int doWork(List<String> args) {
    if (this.infoTag == null || this.infoTag.isEmpty()) {
        LOG.error("Info Tag is undefined");
        return -1;
    }
    if (this.xpathExpression == null || this.xpathExpression.isEmpty()) {
        LOG.error("XPath Expression is undefined");
        return -1;
    }
    for (final String s : __prefix2uri) {
        int eq = s.indexOf('=');
        if (eq <= 0) {
            LOG.error("'=' missing in " + s);
            return -1;
        }
        this.prefix2uri.put(s.substring(0, eq), s.substring(eq + 1));
    }
    try {
        XPathFactory xpf = XPathFactory.newInstance();
        XPath xpath = xpf.newXPath();
        xpath.setXPathVariableResolver(new XPathVariableResolver() {

            @Override
            public Object resolveVariable(QName qname) {
                return xpathVariableMap.get(qname);
            }
        });
        xpath.setNamespaceContext(new NamespaceContext() {

            @Override
            public Iterator<String> getPrefixes(String namespaceURI) {
                final List<String> L = new ArrayList<>();
                for (final String pfx : prefix2uri.keySet()) {
                    if (prefix2uri.get(pfx).equals(namespaceURI)) {
                        L.add(pfx);
                    }
                }
                return L.iterator();
            }

            @Override
            public String getPrefix(final String namespaceURI) {
                for (String pfx : prefix2uri.keySet()) {
                    if (prefix2uri.get(pfx).equals(namespaceURI)) {
                        return pfx;
                    }
                }
                return null;
            }

            @Override
            public String getNamespaceURI(String prefix) {
                return prefix2uri.get(prefix);
            }
        });
        this.xpathExpr = xpath.compile(this.xpathExpression);
        return doVcfToVcf(args, outputFile);
    } catch (Exception er) {
        LOG.error(er);
        return -1;
    }
}

Example 5 with XPathVariableResolver

use of javax.xml.xpath.XPathVariableResolver in project jbpm by kiegroup.

the class XPATHReturnValueEvaluator method evaluate.

public Object evaluate(final ProcessContext context) throws Exception {
    XPathFactory factory = XPathFactory.newInstance();
    XPath xpathEvaluator = factory.newXPath();
    xpathEvaluator.setXPathFunctionResolver(new XPathFunctionResolver() {

        public XPathFunction resolveFunction(QName functionName, int arity) {
            String localName = functionName.getLocalPart();
            if ("getVariable".equals(localName)) {
                return new GetVariableData();
            } else {
                throw new IllegalArgumentException("Unknown BPMN function: " + functionName);
            }
        }

        class GetVariableData implements XPathFunction {

            public Object evaluate(List args) throws XPathFunctionException {
                String varname = (String) args.get(0);
                return context.getVariable(varname);
            }
        }
    });
    xpathEvaluator.setXPathVariableResolver(new XPathVariableResolver() {

        public Object resolveVariable(QName variableName) {
            return context.getVariable(variableName.getLocalPart());
        }
    });
    xpathEvaluator.setNamespaceContext(new NamespaceContext() {

        private static final String DROOLS_NAMESPACE_URI = "http://www.jboss.org/drools";

        private String[] prefixes = { "drools", "bpmn2" };

        @Override
        public Iterator getPrefixes(String namespaceURI) {
            return Arrays.asList(prefixes).iterator();
        }

        @Override
        public String getPrefix(String namespaceURI) {
            if (DROOLS_NAMESPACE_URI.equalsIgnoreCase(namespaceURI)) {
                return "bpmn2";
            }
            return null;
        }

        @Override
        public String getNamespaceURI(String prefix) {
            if ("bpmn2".equalsIgnoreCase(prefix)) {
                return DROOLS_NAMESPACE_URI;
            }
            return null;
        }
    });
    DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
    return xpathEvaluator.evaluate(this.expression, builder.newDocument(), XPathConstants.BOOLEAN);
}