使用MarkLogic java客户端api迭代结果
我有一个XML,有多个节点 使用参数编写查询选项并将其保存到数据库使用MarkLogic java客户端api迭代结果,marklogic,Marklogic,我有一个XML,有多个节点 使用参数编写查询选项并将其保存到数据库 <search:options xmlns:search="http://marklogic.com/appservices/search"> <search:constraint name="extValue"> <search:value> <search:element ns="urn:hl7-org:v2xml" name="CX.1
<search:options xmlns:search="http://marklogic.com/appservices/search">
<search:constraint name="extValue">
<search:value>
<search:element ns="urn:hl7-org:v2xml" name="CX.1" />
</search:value>
</search:constraint>
<search:extract-document-data xmlns="urn:hl7-org:v2xml" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:hl7-org:v2xml ADT_A01.xsd">
<search:extract-path>/ADT_A01/PID/PID.3/CX.4/HD.1</search:extract-path>
<search:extract-path>/ADT_A01/PV1/PV1.7/XCN.2/FN.1</search:extract-path>
<search:extract-path>/ADT_A01/PV1/PV1.7/XCN.3</search:extract-path>
<search:extract-path>/ADT_A01/PV1/PV1.4/CWE.1</search:extract-path>
</search:extract-document-data>
</search:options>
数据库的结果提取了如下内容
<search:extracted>
<HD.1 xmlns="urn:hl7-org:v2xml">ABC</HD.1>
<CWE.1 xmlns="urn:hl7-org:v2xml">E</CWE.1>
<FN.1 xmlns="urn:hl7-org:v2xml">Sri</FN.1>
<XCN.3 xmlns="urn:hl7-org:v2xml">N</XCN.3>
</search:extracted>
基础知识
E
斯里兰卡
N
我的目标是检索并填充JavaPOJO。
是否有其他方法可以直接将结果映射到POJO?最简单的方法是使用MarkLogic 8中引入的POJO facade: 另一种方法是使用JAXBHandle并为查询读取多个文档:
希望这能有所帮助,对于我的答案,我假设您希望保留保留的文档原样。我相信您有两种选择可以直接检索到POJO:
<ADT_A01 xmlns='urn:hl7-org:v2xml'>
<CX.1>1.32022.1.10.2</CX.1>
<HD.1>ABC</HD.1>
<FN.1>Sri</FN.1>
<XCN.3>N</XCN.3>
<CWE.1>E</CWE.1>
</ADT_A01>
下面是代码的其余部分(另存为JAXBExtract.java)
导入com.marklogic.client.DatabaseClient;
导入com.marklogic.client.DatabaseClientFactory;
导入静态com.marklogic.client.DatabaseClientFactory.Authentication.DIGEST;
导入com.marklogic.client.document.XMLDocumentManager;
导入com.marklogic.client.query.QueryManager;
导入com.marklogic.client.query.StructuredQueryBuilder;
导入com.marklogic.client.query.StructuredQueryDefinition;
导入com.marklogic.client.query.RawCombinedQueryDefinition;
导入com.marklogic.client.query.MatchDocumentSummary;
导入com.marklogic.client.query.ExtractedItem;
导入com.marklogic.client.query.ExtractedResult;
导入com.marklogic.client.io.SearchHandle;
导入com.marklogic.client.io.StringHandle;
导入com.marklogic.client.io.Format;
导入com.marklogic.client.io.JAXBHandle;
导入javax.xml.bind.JAXBContext;
公共类JAXBExtract{
私有静态DatabaseClient=DatabaseClientFactory.newClient(
“本地主机”,8000,“管理员”,“管理员”,摘要);
私有静态XMLDocumentManager docMgr=
client.newXMLDocumentManager();
公共静态void main(字符串[]args)引发异常{
字符串xml=
"" +
"1.32022.1.10.2" +
“ABC”+
“斯里兰卡”+
“N”+
“E”+
"";
String docId=“JAXBTransform_doc1.xml”;
docMgr.writeAs(docId,xml);
字符串选项=
"" +
"" +
"" +
"" +
"" +
"" +
"" +
“//HD.1”+
“//FN.1”+
“//XCN.3”+
“//CWE.1”+
"" +
"";
QueryManager queryMgr=client.newQueryManager();
StructuredQueryBuilder qb=新StructuredQueryBuilder();
结构querydefinition querydef=
和(qb.valueConstraint(“extValue”,“1.32022.1.10.2”));
//通常你会在服务器上安装你的选项,我只是这样做
//RawCombinedQueryDefinition从示例中删除安装步骤
RawCombinedQueryDefinition rawQuery=queryMgr.newRawCombinedQueryDefinition(
新弦柄(
"" +
querydef.serialize()+
选择权+
“”)。withFormat(Format.XML));
SearchHandle resultsHandle=queryMgr.search(rawQuery,newsearchHandle());
MatchDocumentSummary[]summaries=resultsHandle.getMatchResults();
//如果要使用getAs,只需注册ADT_A01.class
//看http://www.marklogic.com/blog/io-shortcut-marklogic-java-client-api/
DatabaseClientFactory.GetHandlerRegistry().register(
JAXBHandle.newFactory(ADT_A01.class)
);
用于(匹配文档摘要:摘要){
ExtractedResult extracted=summary.getExtracted();
if(Format.XML==summary.getFormat()){
ExtractedItem=extracted.next();
//因为我通过JAXBHandle注册了ADT_A01.class,所以使用了它
//在幕后马歇尔的对象
ADT_A01 myObj=项目.getAs(ADT_A01.class);
System.out.println(“myObj=[“+myObj+”]);
System.out.println(“提取的xml=[”+item.getAs(String.class)+“]);
}
}
client.newXMLDocumentManager().delete(docId);
}
}
这里的问题是,我从xml的多个XPath提取数据。因此,我不能直接将pojo映射到xml。在这些链接中,我没有看到任何可以将ExtractedResult对象转换为POJO或提取结果响应并转换为POJO的示例。使用extract的一个替代方法是使用JAXB序列化POJO,以发现JAXB可以将哪些XML作为输入。然后,编写从源文档到JAXB输入XML的转换,并将其安装到服务器上。然后,在客户端上,您可以使用JAXBHandle为一个查询读取多个文档,在服务器上转换文档。。我有一个由一个后台进程持久化的源XML。现在,我需要从源代码中通过XPath转换检索一些元素值,比如我在sourceXML中提取20个元素的5个值,并在UI中显示它。稍后,如果业务部门要求在摘录中添加一个以上字段
<ADT_A01 xmlns='urn:hl7-org:v2xml'>
<CX.1>1.32022.1.10.2</CX.1>
<HD.1>ABC</HD.1>
<FN.1>Sri</FN.1>
<XCN.3>N</XCN.3>
<CWE.1>E</CWE.1>
</ADT_A01>
<search:extracted kind="element">
<ADT_A01 xmlns="urn:hl7-org:v2xml">
<HD.1>ABC</HD.1><FN.1>Sri</FN.1><XCN.3>N</XCN.3><CWE.1>E</CWE.1>
</ADT_A01>
</search:extracted>
@XmlRootElement(name="ADT_A01", namespace="urn:hl7-org:v2xml")
public class ADT_A01 {
@XmlElement(name="HD.1")
public String HD_1;
@XmlElement(name="FN.1")
public String FN_1;
@XmlElement(name="XCN.3")
public String XCN_3;
@XmlElement(name="CWE.1")
public String CWE_1;
public String toString() {
return "HD_1=[" + HD_1 + "] FN_1=[" + FN_1 + "] XCN_3=[" +
XCN_3 + "] CWE_1=[" + CWE_1 + "]";
}
}
import com.marklogic.client.DatabaseClient;
import com.marklogic.client.DatabaseClientFactory;
import static com.marklogic.client.DatabaseClientFactory.Authentication.DIGEST;
import com.marklogic.client.document.XMLDocumentManager;
import com.marklogic.client.query.QueryManager;
import com.marklogic.client.query.StructuredQueryBuilder;
import com.marklogic.client.query.StructuredQueryDefinition;
import com.marklogic.client.query.RawCombinedQueryDefinition;
import com.marklogic.client.query.MatchDocumentSummary;
import com.marklogic.client.query.ExtractedItem;
import com.marklogic.client.query.ExtractedResult;
import com.marklogic.client.io.SearchHandle;
import com.marklogic.client.io.StringHandle;
import com.marklogic.client.io.Format;
import com.marklogic.client.io.JAXBHandle;
import javax.xml.bind.JAXBContext;
public class JAXBExtract {
private static DatabaseClient client = DatabaseClientFactory.newClient(
"localhost", 8000, "admin", "admin", DIGEST);
private static XMLDocumentManager docMgr =
client.newXMLDocumentManager();
public static void main(String[] args) throws Exception {
String xml =
"<ADT_A01 xmlns='urn:hl7-org:v2xml'>" +
"<CX.1>1.32022.1.10.2</CX.1>" +
"<HD.1>ABC</HD.1>" +
"<FN.1>Sri</FN.1>" +
"<XCN.3>N</XCN.3>" +
"<CWE.1>E</CWE.1>" +
"</ADT_A01>";
String docId = "JAXBTransform_doc1.xml";
docMgr.writeAs(docId, xml);
String options =
"<search:options>" +
"<search:constraint name='extValue'>" +
"<search:value>" +
"<search:element ns='urn:hl7-org:v2xml' name='CX.1' />" +
"</search:value>" +
"</search:constraint>" +
"<search:extract-document-data selected='include-with-ancestors' " +
"xmlns='urn:hl7-org:v2xml'>" +
"<search:extract-path>//HD.1</search:extract-path>" +
"<search:extract-path>//FN.1</search:extract-path>" +
"<search:extract-path>//XCN.3</search:extract-path>" +
"<search:extract-path>//CWE.1</search:extract-path>" +
"</search:extract-document-data>" +
"</search:options>";
QueryManager queryMgr = client.newQueryManager();
StructuredQueryBuilder qb = new StructuredQueryBuilder();
StructuredQueryDefinition querydef =
qb.and(qb.valueConstraint("extValue", "1.32022.1.10.2"));
// normally you'd install your options on the server, I'm just doing
// RawCombinedQueryDefinition to remove the installation step from my example
RawCombinedQueryDefinition rawQuery = queryMgr.newRawCombinedQueryDefinition(
new StringHandle(
"<search:search xmlns:search='http://marklogic.com/appservices/search'>" +
querydef.serialize() +
options +
"</search:search>").withFormat(Format.XML));
SearchHandle resultsHandle = queryMgr.search(rawQuery, new SearchHandle());
MatchDocumentSummary[] summaries = resultsHandle.getMatchResults();
// you only have to register ADT_A01.class if you want to use getAs
// see http://www.marklogic.com/blog/io-shortcut-marklogic-java-client-api/
DatabaseClientFactory.getHandleRegistry().register(
JAXBHandle.newFactory(ADT_A01.class)
);
for (MatchDocumentSummary summary : summaries) {
ExtractedResult extracted = summary.getExtracted();
if (Format.XML == summary.getFormat()) {
ExtractedItem item = extracted.next();
// since I registered ADT_A01.class via JAXBHandle, it is used
// behind the scenes to marshall the object
ADT_A01 myObj = item.getAs(ADT_A01.class);
System.out.println("myObj=[" + myObj + "]");
System.out.println("extracted xml=[" + item.getAs(String.class) + "]");
}
}
client.newXMLDocumentManager().delete(docId);
}
}