Java

Iterate over Direct Child Nodes by Index

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Demonstrates some ways to iterate over direct child nodes by index.

The input XML, available at http://www.chilkatsoft.com/data/get_child.xml, is this:

<root>
    <fruit color="red">apple</fruit>
    <fruit color="green">pear</fruit>
    <veg color="orange">carrot</veg>
    <meat animal="cow">beef</meat>
    <xyz>
        <fruit color="blue">blueberry</fruit>
        <veg color="green">broccoli</veg>
    </xyz>
    <fruit color="purple">grape</fruit>
    <cheese color="yellow">cheddar</cheese>
</root>

Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    CkXml xml = new CkXml();
    CkXml child;

    // The sample input XML is available at http://www.chilkatsoft.com/data/get_child.xml
    success = xml.LoadXmlFile("get_child.xml");
    if (success != true) {
        System.out.println(xml.lastErrorText());
        return;
        }

    // The NumChildren property contains the number of direct
    // child nodes.  Note: The child nodes under "xyz" are NOT
    // direct children of "root".  Therefore, the "root" node has
    // 7 direct children
    System.out.println("NumChildren = " + xml.get_NumChildren());

    // Iterate over the direct children by index. The first child
    // is at index 0.
    int i;
    for (i = 0; i <= xml.get_NumChildren() - 1; i++) {
        //  access the tag and content directly by index:
        System.out.println(i + ": " + xml.getChildTagByIndex(i) + " : " + xml.getChildContentByIndex(i));

        }

    System.out.println("-----");

    // Do the same as the above loop, but get the child node
    // and access the Tag and Content properties:
    for (i = 0; i <= xml.get_NumChildren() - 1; i++) {
        child = xml.GetChild(i);
        System.out.println(i + ": " + child.tag() + " : " + child.content());

        }

    System.out.println("-----");

    // Do the same as the above loop, but instead of creating
    // a new object instance for each child, call GetChild2 to
    // update the object's reference instead.
    for (i = 0; i <= xml.get_NumChildren() - 1; i++) {
        // Navigate to the Nth child.  
        success = xml.GetChild2(i);
        System.out.println(i + ": " + xml.tag() + " : " + xml.content());
        // Navigate back up to the parent:
        success = xml.GetParent2();
        }

    System.out.println("-----");

    // Notice that the Content of the "xyz" node is empty.  This is correct.
    // The "xyz" node has no Content, but 2 direct children
  }
}