java - MarkLogic POJO 数据绑定(bind)接口(interface) : JSONMappingException when performing a POJO search

Question

我目前正在使用 MarkLogic POJO 数据绑定(bind)接口(interface)。我能够将 POJO 写入 MarkLogic。现在我想搜索这些 POJO 并检索搜索结果。我正在按照以下指示进行操作:https://docs.marklogic.com/guide/java/binding#id_89573但是，搜索结果似乎没有返回正确的对象。我收到 JSONMappingException。代码如下:

    HashMap<String, MatchedPropertyInfo> matchedProperties = new HashMap<String, MatchedPropertyInfo>();
    PropertyMatches PM = new PropertyMatches(123,"uri/prefix/location2", "uri/prefix", 1234,0,"/aKey","/aLocation",true,matchedProperties);
    MatchedPropertyInfo MPI1 = new MatchedPropertyInfo("matched/property/uri1", "matched/property/key1", "matched/property/location1", true,"ValueMatch1", 12, 1*1.0/3, true);
    MatchedPropertyInfo MPI2 = new MatchedPropertyInfo("matched/property/uri2", "matched/property/key2", "matched/property/location2", true,"ValueMatch2", 14, 1.0/2.0, true);
    PM.getMatchedProperties().put("matched/property/prefix/location1", MPI1);
    PM.getMatchedProperties().put("matched/property/prefix/location2", MPI2);

    PojoRepository myClassRepo = client.newPojoRepository(PropertyMatches.class, Long.class);
    myClassRepo.write(PM);

    PojoQueryBuilder qb = myClassRepo.getQueryBuilder();
    PojoPage<PropertyMatches> matches = myClassRepo.search(qb.value("uri", "uri/prefix/location2"),1);
    if (matches.hasContent()) {
        while (matches.hasNext()) {
            PropertyMatches aPM = matches.next();
            System.out.println("  " + aPM.getURI());
        }
     } else {
        System.out.println("  No matches");
     }

PropertyMatches (PM) 对象已成功写入 MarkLogic 数据库。该类包含一个成员:private String URI，它以“uri/prefix/location2”启动。在上面的示例中，matches.hasContent() 返回 true。但是，我在 PropertyMatches aPM = matches.next();

上遇到错误

Answer 1

在 MarkLogic 中搜索 POJO 并将其读入 Java 程序需要 POJO 具有空构造函数。在本例中，PropertyMatches 应具有 public PropertyMatches(){}，MatchedPropertyInfo 应具有 public MatchedPropertyInfo(){}