处理xml或者json格式返回数据之EasyNet.Solr

作者：袖梨 2022-06-25

处理xml或者json格式返回数据之easynet.solr
在easynet.solr中，有两个接口最重要，一个是编解码器接口icodec，一个是solr输出结果解析器接口isolrresponseparser。
easynet.solr内置了两个编解码器实现：javabincodec，textcodec。javabincodec对应solr中基于javabin协议，textcodec对应solr中的xml、json等基于文本的协议。相应定义了binarycodecfactory，用于创建javabincodec，textcodecfactory用于创建textcodec。在solrconnection中有个codecfactory的属性，这是
public class example
2     {
3         public string id { get; set; }
4         public string name { get; set; }
5         public ilist features { get; set; }
6         public datetime modifieddatetime { get; set; }
7     }
定义exampleobjectdeserialize用于反序列化：

view code
1   public class exampleobjectdeserialize : iobjectdeserialize
2     {
3         public ienumerable deserialize(solrdocumentlist result)
4         {
5             var examples = new list();
6
7             foreach (solrdocument doc in result)
8             {
9                 examples.add(new example()
10                 {
11                     id = doc["id"].tostring(),
12                     name = doc["name"].tostring(),
13                     modifieddatetime = convert.todatetime(doc["last_modified"]),
14                     features = (ilist)doc["features"]
15                 });
16             }
17
18             return examples;
19         }
20     }
处理xml格式返回数据：

view code
1             var codefactory = new textcodecfactory();
2             var con = new solrconnection("http://localhost:8088/solr") { codecfactory = codefactory };
3             var objectdeserialize = new exampleobjectdeserialize();
4             var qop = new solrqueryoperations(con);
5             var options = new namevaluecollection();
6
7             options.add(commonparams.start, "0");
8             options.add(commonparams.rows, "10");
9             options.add(highlightparams.highlight, "true");
10             options.add(highlightparams.fields, "name");
11             options.add(commonparams.wt, "xml");
12
13             var response = qop.query(new solrquery("name:terry"), options);
14
15             //解析返回头信息
16             var xmlresponseheaderparser = new xmlresponseheaderparser();
17
18             var responseheader = xmlresponseheaderparser.parser(response);
19
20             //解析高亮
21             var xmlhighlightingparser = new xmlhighlightingparser();
22
23             var highlighting = xmlhighlightingparser.parser(response);
24
25             //解析查询结果
26             var xmlqueryresultsparser = new xmlqueryresultsparser(objectdeserialize);
27
28             var examples = xmlqueryresultsparser.parser(response);
处理json格式返回数据：

view code
1             var codefactory = new textcodecfactory();
2             var con = new solrconnection("http://localhost:8088/solr") { codecfactory = codefactory };
3             var objectdeserialize = new exampleobjectdeserialize();
4             var qop = new solrqueryoperations(con);
5             var options = new namevaluecollection();
6
7             options.add(commonparams.start, "0");
8             options.add(commonparams.rows, "10");
9             options.add(highlightparams.highlight, "true");
10             options.add(highlightparams.fields, "name");
11             options.add(commonparams.wt, "json");
12
13             var response = qop.query(new solrquery("name:terry"), options);
14
15             //解析头信息
16             var jsonresponseheaderparser = new jsonresponseheaderparser();
17
18             var responseheader = jsonresponseheaderparser.parser(response);
19
20             //解析高亮
21             var jsonhighlightingparser = new jsonhighlightingparser();
22
23             var highlighting = jsonhighlightingparser.parser(response);
24
25             //解析查询结果
26             var jsonqueryresultsparser = new jsonqueryresultsparser(objectdeserialize);
27
28             var examples = jsonqueryresultsparser.parser(response);