Utils.java Source code

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Here is the source code for Utils.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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 java.io.IOException;
import java.io.StringReader;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.stream.StreamSource;

import org.w3c.dom.Document;
import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

/**
 * Few simple utils to read DOM. This is originally from the Jakarta Commons
 * Modeler.
 * 
 * @author Costin Manolache
 */
public class Utils {
    public static Document readXml(StreamSource is) throws SAXException, IOException, ParserConfigurationException {

        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

        dbf.setValidating(false);
        dbf.setIgnoringComments(false);
        dbf.setIgnoringElementContentWhitespace(true);
        dbf.setNamespaceAware(true);
        // dbf.setCoalescing(true);
        // dbf.setExpandEntityReferences(true);

        DocumentBuilder db = null;
        db = dbf.newDocumentBuilder();
        db.setEntityResolver(new NullResolver());

        // db.setErrorHandler( new MyErrorHandler());
        InputSource is2 = new InputSource();
        is2.setSystemId(is.getSystemId());
        is2.setByteStream(is.getInputStream());
        is2.setCharacterStream(is.getReader());

        return db.parse(is2);
    }
}

class NullResolver implements EntityResolver {
    public InputSource resolveEntity(String publicId, String systemId) throws SAXException, IOException {
        return new InputSource(new StringReader(""));
    }
}