Java XPath Evaluate evaluateXpath(String expression, Document document, QName dataType)

Description

evaluate Xpath

License

Apache License

Declaration

@SuppressWarnings("unchecked")
    private static <T> T evaluateXpath(String expression, Document document, QName dataType) 

Method Source Code

//package com.java2s;
/*/*  ww w  . j  a v  a2 s . c o m*/
 * Copyright (c) 2012 - 2015 by Stefan Ferstl <st.ferstl@gmail.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import javax.xml.namespace.QName;

import javax.xml.xpath.XPath;

import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import org.w3c.dom.Document;

public class Main {
    @SuppressWarnings("unchecked")
    private static <T> T evaluateXpath(String expression, Document document, QName dataType) {
        try {
            XPath xpath = createXPath();
            XPathExpression compiledExpression = xpath.compile(expression);
            return (T) compiledExpression.evaluate(document, dataType);
        } catch (XPathExpressionException e) {
            throw new IllegalArgumentException("Cannot evaluate XPath expression '" + expression + "'");
        }
    }

    private static XPath createXPath() {
        return XPathFactory.newInstance().newXPath();
    }
}

Related

1. evaluateXPath(Element element, String xpathstring)
2. evaluateXpath(Element from, String xpath)
3. evaluateXPath(final String xPath, final Object item, final QName returnType)
4. evaluateXPath(final XPathExpression expr, final Object rootNode, final QName returnType)
5. evaluateXPath(Node node, String xPath)
6. evaluateXpath(String expression, Object node, QName returnType, NamespaceContext nsContext)
7. evaluateXPath(String path, Node e, QName type)
8. evaluateXPath(String xpath, Object item, QName returnType)
9. evaluateXPathAsNodeList(String expression, Document document)