Objective-C

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.

Objective-C

#import <CkoHashtable.h>
#import <CkoStringBuilder.h>
#import <CkoStringTable.h>
#import <NSString.h>

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

//  Add some entries to a hashtable.
CkoHashtable *hashTab = [[CkoHashtable alloc] init];

[hashTab AddStr: @"aaa" value: @"111"];
[hashTab AddStr: @"bbb" value: @"222"];
[hashTab AddStr: @"ccc" value: @"333"];

//  Serialize to XML
CkoStringBuilder *sb = [[CkoStringBuilder alloc] init];
[hashTab ToXmlSb: sb];
NSLog(@"%@",[sb GetAsString]);
NSLog(@"%@",@"---");

//  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.
CkoHashtable *hashTab2 = [[CkoHashtable alloc] init];
[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.
CkoStringTable *sTable = [[CkoStringTable alloc] init];
[hashTab2 GetKeys: sTable];

int i = 0;
int numKeys = [sTable.Count intValue];
while (i < numKeys) {
    NSString *key = [sTable StringAt: [NSNumber numberWithInt: i]];
    NSLog(@"%@%@%@",key,@": ",[hashTab2 LookupStr: key]);
    i = i + 1;
}