I have an XML, with multiple nodes
Have written query options with a parameter and save it to database
<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>
retrieved results
DatabaseClient client = factory.getSuperMLConnection();
QueryManager queryMgr = client.newQueryManager();
//used the query options above which is saved to DB with name v2searchQueryOpts
StructuredQueryBuilder qb = new StructuredQueryBuilder("v2searchQueryOpts");
//this is one of the element value in the xml
StructuredQueryDefinition querydef =
qb.and(qb.valueConstraint("extValue", "1.32022.1.10.2"));
SearchHandle resultsHandle = queryMgr.search(querydef, new SearchHandle());
MatchDocumentSummary[] summaries = resultsHandle.getMatchResults();
// here is where i am concerned.
for (MatchDocumentSummary summary : summaries) {
ExtractedResult extracted = summary.getExtracted();
if (Format.XML == summary.getFormat()) {
Document facility = extracted.next().getAs(Document.class);
Document status = extracted.next().getAs(Document.class);
Document physicianFirstName = extracted.next().getAs(Document.class);
Document physicianLastName = extracted.next().getAs(Document.class);
System.out.println("status is :: " + status.getFirstChild().getTextContent());
System.out.println("facility is :: " + facility.getFirstChild().getTextContent());
System.out.println("physicianFirstName is :: " + physicianFirstName.getFirstChild().getTextContent());
System.out.println("physicianLastName is :: " + physicianLastName.getFirstChild().getTextContent());
}
}
}
The result from the database has extracted content as below
<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>
My objective is to retrieve and populate a java POJO. is there any other way i can directly map my result to POJO?
答案 0 :(得分：2)
最简单的方法是使用MarkLogic 8中引入的POJO外观：
http://docs.marklogic.com/guide/java/binding
另一种方法是使用JAXBHandle并为查询读取多个文档：
http://docs.marklogic.com/javadoc/client/com/marklogic/client/io/JAXBHandle.html http://docs.marklogic.com/guide/java/bulk#id_37758
希望有帮助，
答案 1 :(得分：1)
对于我的回答，我假设您要保留原样保留的文档。我相信您有两种选择直接将其检索到POJO：
第一种方法需要安装REST变换，该变换在SearchResponseTransform.java中进行了演示。 我在这里展示第二种方法。为了举例，我简化了你的XML。我将把它作为练习让你使用你的JAXB忍者技能来配置映射到你的XML的POJO，或者使用SearchResponseTransform.java中的技术将结果转换成像这个例子一样简单的东西。
这是我将插入到db中的XML。它基于你的，但简化了：
<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>
我将使用的搜索选项与您的搜索选项几乎相同，只是我简化了匹配示例XML的路径，并添加了 selected =“include-with-ancestors”这是关键获取一个包含所有提取项的XML结构。使用这个，我在结果中找到了这个：
<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>
这是目标POJO（另存为ADT_A01.java）： import javax.xml.bind.annotation.XmlRootElement; import javax.xml.bind.annotation.XmlElement;
@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 + "]";
}
}
这是代码的其余部分（另存为JAXBExtract.java）
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);
}
}