Java

Compress XML Tree

See more XML Examples

Demonstrates how to compress and restore the entire subtree rooted at an XML node.

The input XML, available at http://www.chilkatsoft.com/data/compress2.xml, is this:

<root>
    <lazydog>
        <fox>The quick brown fox jumps over the lazy dog</fox>
    </lazydog>
    <fox>The quick brown fox jumps over the lazy dog</fox>
    <child>
        <grandchild>The quick brown fox jumps over the lazy dog</grandchild>
    </child>
    <child>
        <grandchild>The quick brown fox jumps over the lazy dog</grandchild>
    </child>
</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();

    // The sample input XML is available at http://www.chilkatsoft.com/data/compress2.xml
    success = xml.LoadXmlFile("compress2.xml");
    if (success != true) {
        System.out.println(xml.lastErrorText());
        return;
        }

    // Zip compress the root node's entire subtree:
    success = xml.ZipTree();

    // Examine the new XML document:
    System.out.println(xml.getXml());

    // This is the XML w/ the compressed subtree in Base64 encoded format:

    // <root><![CDATA[4+WyKcrPL7Hj5VIAApucxKrKlPx0KBcslJZfYReSkapQWJqZnK2QVJRfnqcAFFPIKs0tKFbIL0st
    // UigBSoN0KgC12uiDNECN00c1jyKzkjMyc1KQHZZelJiXAhElyUwkfTBnovDoYZGNPjTUAQ==
    // ]]></root>

    // Now uncompress and show that the original subtree was restored:
    success = xml.UnzipTree();
    System.out.println(xml.getXml());
  }
}