org.htmlunit.xpath.functions.FuncQname Maven / Gradle / Ivy

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The XPath engine used by HtmlUnit.

There is a newer version: 4.7.0

/*
 * 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.
 */
package org.htmlunit.xpath.functions;

import org.htmlunit.xpath.XPathContext;
import org.htmlunit.xpath.objects.XObject;
import org.htmlunit.xpath.objects.XString;
import org.htmlunit.xpath.xml.dtm.DTM;

/** Execute the Qname() function. */
public class FuncQname extends FunctionDef1Arg {

  /** {@inheritDoc} */
  @Override
  public XObject execute(final XPathContext xctxt) throws javax.xml.transform.TransformerException {

    final int context = getArg0AsNode(xctxt);
    final XObject val;

    if (DTM.NULL != context) {
      final DTM dtm = xctxt.getDTM(context);
      final String qname = dtm.getNodeNameX(context);
      val = (null == qname) ? XString.EMPTYSTRING : new XString(qname);
    }
    else {
      val = XString.EMPTYSTRING;
    }

    return val;
  }
}