Java XML First Child Element getFirstChildText(@Nullable final Node aStartNode)

Description

Get the content of the first Text child element of the passed element.

License

Apache License

Parameter

Parameter	Description
aStartNode	the element to scan for a TextNode child

Return

null if the element contains no text node as child

Declaration

@Nullable
public static String getFirstChildText(@Nullable final Node aStartNode) 

Method Source Code

//package com.java2s;
/**// w w  w  . ja  v a2 s . co m
 * 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.Nullable;

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

public class Main {
    /**
     * Get the content of the first Text child element of the passed element.
     *
     * @param aStartNode
     *        the element to scan for a TextNode child
     * @return <code>null</code> if the element contains no text node as child
     */
    @Nullable
    public static String getFirstChildText(@Nullable final Node aStartNode) {
        if (aStartNode != null) {
            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 instanceof Text) {
                    final Text aText = (Text) aNode;

                    // ignore whitespace-only content
                    if (!aText.isElementContentWhitespace())
                        return aText.getData();
                }
            }
        }
        return null;
    }

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

Related

1. getFirstChildNode(Node parentNode, String childNodeName)
2. getFirstChildNodeWithName(String nodeName, Node parentNode)
3. getFirstChildOfTagName(Element elem, String name)
4. getFirstChildOfType(final Element elParent, final String childTag)
5. getFirstChildTag(Element el, String tag)
6. getFirstChildText(Node aNode)
7. getFirstChildText(Node parent)
8. getFirstChildTextByTagName(Element element, String tagName)
9. getFirstChildTextContent(Node node)