Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
/*
 * #%L
 * i2b2 Export Service
 * %%
 * Copyright (C) 2013 Emory University
 * %%
 * 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.
 * #L%
 */

import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import javax.xml.namespace.QName;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import java.io.IOException;
import java.io.StringReader;

public class Main {
    /**
     * Gets the object at the given XPath in the given XML node. See also:
     * {@link #evalXPath(String, String, javax.xml.namespace.QName)}.
     *
     * @param d the node to look in
     * @param expr the XPath expression to evaluate
     * @param returnType the expected return type of the object
     * @return the object at the specified XPath in the node
     * @throws XPathExpressionException if an error occurs processing the XPath
     * expression
     */
    static Object evalXPath(Node d, String expr, QName returnType) throws XPathExpressionException {
        return XPathFactory.newInstance().newXPath().compile(expr).evaluate(d, returnType);
    }

    /**
     * Gets the object at the given XPath in the given XML string. See also:
     * {@link #evalXPath(org.w3c.dom.Node, String, javax.xml.namespace.QName)}.
     *
     * @param xml the XML string to look in
     * @param expr the XPath expression to evaluate
     * @param returnType expected return type of the object
     * @return the object at the specified XPath in the XML string
     * @throws XPathExpressionException if an error occurs while processing the
     * XPath expression
     * @throws SAXException if an error occurs converting the XML string to an
     * XML node
     * @throws IOException if a general IO error occurs
     * @throws ParserConfigurationException if an error occurs configuring the
     * parser
     */
    static Object evalXPath(String xml, String expr, QName returnType)
            throws XPathExpressionException, SAXException, IOException, ParserConfigurationException {
        return evalXPath(xmlStringToDocument(xml), expr, returnType);
    }

    /**
     * Converts an XML string into an equivalent XML document. Applies the
     * reverse operation of {@link #xmlDocumentToString(org.w3c.dom.Node)}.
     *
     * @param xml the XML string to convert
     * @return a {@link Document} equivalent to the specified XML string
     * @throws SAXException if an error occurs building the XML document
     * @throws IOException if a general IO error occurs
     * @throws ParserConfigurationException if an error occurs configuring the
     * XML parser
     */
    static Document xmlStringToDocument(String xml) throws SAXException, IOException, ParserConfigurationException {
        return DocumentBuilderFactory.newInstance().newDocumentBuilder()
                .parse(new InputSource(new StringReader(xml)));
    }
}