Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
/**
 * Copyright (C) 2014-2015 Philip Helger (www.helger.com)
 * philip[at]helger[dot]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.annotation.Nonnegative;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;

import org.w3c.dom.Element;

import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class Main {
    /**
     * Search all child nodes of the given for the first element that has the
     * specified tag name.
     *
     * @param aStartNode
     *        The parent element to be searched. May not be <code>null</code>.
     * @param sName
     *        The tag name to search.
     * @return <code>null</code> if the parent element has no such child element.
     */
    @Nullable
    public static Element getFirstChildElementOfName(@Nonnull final Node aStartNode, @Nullable final String sName) {
        final NodeList aNodeList = aStartNode.getChildNodes();
        final int nLen = aNodeList.getLength();
        for (int i = 0; i < nLen; ++i) {
            final Node aNode = aNodeList.item(i);
            if (aNode.getNodeType() == Node.ELEMENT_NODE) {
                final Element aElement = (Element) aNode;
                if (aElement.getTagName().equals(sName))
                    return aElement;
            }
        }
        return null;
    }

    @Nonnegative
    public static int getLength(@Nullable final NodeList aNL) {
        return aNL == null ? 0 : aNL.getLength();
    }
}