Java

Serialize / Deserialize Hashtable to/from XML

Demonstrates how to seralize / deserialize a Hashtable to/from XML.

Note: This example requires Chilkat v9.5.0.64 or later.

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[])
  {
    // Note: This example requires Chilkat v9.5.0.64 or later.

    // Add some entries to a hashtable.
    CkHashtable hashTab = new CkHashtable();

    hashTab.AddStr("aaa","111");
    hashTab.AddStr("bbb","222");
    hashTab.AddStr("ccc","333");

    // Serialize to XML
    CkStringBuilder sb = new CkStringBuilder();
    hashTab.ToXmlSb(sb);
    System.out.println(sb.getAsString());
    System.out.println("---");

    // The output is as follows.  Each hash table entry
    // is contained in an "e" node.  The entry's key
    // is in the "k" node, and the value in the "v" node.

    // <?xml version="1.0" encoding="utf8-8"?>
    // <hashtable>
    // <e><k>aaa</k><v>111</v></e>
    // <e><k>bbb</k><v>222</v></e>
    // <e><k>ccc</k><v>333</v></e>
    // </hashtable>
    // 

    // Now load (deserialize) into a new hash table.
    CkHashtable hashTab2 = new CkHashtable();
    hashTab2.AddFromXmlSb(sb);

    // Get the hash table keys, and lookup each (to show 
    // that the hash table was correctly deserialized).
    // The GetKeys method can return the keys in any order.
    CkStringTable sTable = new CkStringTable();
    hashTab2.GetKeys(sTable);

    int i = 0;
    int numKeys = sTable.get_Count();
    while (i < numKeys) {
        String key = sTable.stringAt(i);
        System.out.println(key + ": " + hashTab2.lookupStr(key));
        i = i+1;
        }
  }
}