I am new to Jaxb and having problem parsing a simple XML. The XML in question is shown below:
<tables>
<table id="1" >
<schema>validator_test</schema>
<name>test1</name>
<rowCountToValidate>6</rowCountToValidate>
<columnTypeCheckRequired>FALSE</columnTypeCheckRequired>
<additionalColumns>column1,column2</additionalColumns>
</table>
<table id="2">
<schema>validator_test</schema>
<name>validate_external1</name>
<rowCountToValidate>2</rowCountToValidate>
<columnTypeCheckRequired>FALSE</columnTypeCheckRequired>
<additionalColumns>column1,column2</additionalColumns>
</table>
<table id="3">
<schema>validator_test</schema>
<name>Test_View1</name>
<rowCountToValidate>2</rowCountToValidate>
<columnTypeCheckRequired>FALSE</columnTypeCheckRequired>
<additionalColumns>column1,column2</additionalColumns>
</table>
</tables>
The Jaxb class to unmarshall this is:-
#XmlRootElement(name = "table")
#XmlType(propOrder = { "name", "schema", "rowCountToValidate","columnTypeCheckRequired","additionalColumns","targetName"})
#Service
public class TableInfo {
private static final boolean TRUE = true;
#Value("${default.row.count.to.validate}")
private Integer defaultRowCountToValidate;
/**
*
*/
public TableInfo() {
}
private String name;
private String schema;
private Integer rowCountToValidate;
private String targetName;
private String columnTypeCheckRequired;
private String additionalColumns;
#XmlElement(name = "name")
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
#XmlElement(name = "schema")
public String getSchema() {
return schema;
}
public void setSchema(String schema) {
this.schema = schema;
}
#XmlElement(name = "rowCountToValidate")
public Integer getRowCountToValidate() {
return rowCountToValidate;
}
#XmlElement(name = "columnTypeCheckRequired")
public String getColumnTypeCheckRequired() {
return columnTypeCheckRequired;
}
public void setColumnTypeCheckRequired(String columnTypeCheckRequired) {
this.columnTypeCheckRequired = columnTypeCheckRequired;
}
#XmlElement(name = "additionalColumns")
public String getAdditionalColumns() {
return additionalColumns;
}
public void setAdditionalColumns(String additionalColumns) {
this.additionalColumns = additionalColumns;
}
public void setRowCountToValidate(Integer rowCountToValidate) {
// If user configured value is not null and greater than zero then set
// the value otherwise use default value
if ((null != rowCountToValidate) && (rowCountToValidate.intValue() > 0)) {
this.rowCountToValidate = rowCountToValidate;
}else {
this.rowCountToValidate = defaultRowCountToValidate;
}
}
#XmlElement(name = "targetName")
public String getTargetName() {
return targetName;
}
public void setTargetName(String targetName) {
this.targetName = targetName;
}
#Override
public String toString() {
return ToStringBuilder.reflectionToString(this);
}
}
However, I am ggetting the following exception:-
`JAXB unmarshalling exception; nested exception is javax.xml.bind.UnmarshalException: unexpected element (uri:"", local:"tables"). Expected elements are <{tables}table>`
I would really appreciate if someone can point out the error I am doing. I am new to this and am not really able to understand how jaxb works.
You need to create class Tables with #XmlRootElement(name = "tables") and that class must contain table field with type TableInfo.
When you unmarshal example xml, you need to pass Tables class to unmarshaller.
#XmlRootElement(name = "table")
<tables>
<table id="1" >
Below are the 2 solution for above issue:
You need to generate the classes using XSD.
You need to generate the classes as per your required XML:
in XML table is inside the tables so tables should be the root element.
And table should be in the form of list in tables class.
in your code root element is #XmlRootElement(name = "table") where in your XML file it is "tables"
Suggest you to use xjc command to build java POJO classes automatically
xjc -d -p sample.xsd
-d to define where the generated classes shall be stored in the file system,
-p to define the package to be used
Related
How do I annotate the externalValue and companyId fields in the Root class so that "abc" gets mapped to externalValue and "123" gets mapped to companyId?
Do I need the #XmlJavaTypeAdapter annotation? Where? I'm hoping that if I do, it can just handle those 2 fields and I can leave the annotations for title and countryCodes as-is.
XML:
<item>
<externalValue companyId="123">abc</externalValue>
<title>My Title</title>
<country>US</country>
<country>CA</country>
</item>
POJO:
#XmlRootElement
#XmlAccessorType(XmlAccessType.FIELD)
public class Item {
private String externalValue;
private String companyId;
#XmlElement
private String title;
#XmlElement(name = "country")
public List<String> countryCodes;
// getters and setters...
}
I am afraid that this is not possible to achieve only with annotations (so without extra POJO and some adapter) in general case namely JAXB specs. However if your happen to use MOXy as your JAXB implementation it is easy as adding annotation #XmlPath like this:
#XmlPath("externalValue/#companyId")
private String companyId;
Related question: Unmarshalling an XML using Xpath expression and jaxb
You have to define the class in the following manner.
#XmlRootElement
#XmlAccessorType(XmlAccessType.FIELD)
public class Item {
private CompanyIdValue companyIdValue;
#XmlElement
private String title;
#XmlElement(name = "country")
public List<String> countryCodes;
//getter and setter
}
In case of both attribute in an XML element tag, you have to define a separate class. Define a separate class called CompanyIdValue, for XML element, you have to define #XmlValue and for attribute you have to annotate with #XmlAttribute
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlValue;
public class CompanyIdValue {
#XmlElement(name = "externalValue")
private String externalValue;
private String companyId;
public String getExternalValue() {
return externalValue;
}
#XmlValue
public void setExternalValue(String externalValue) {
this.externalValue = externalValue;
}
public String getCompanyId() {
return companyId;
}
#XmlAttribute
public void setCompanyId(String companyId) {
this.companyId = companyId;
}
}
I provide below a test program also for testing.
public class Test {
public static void main(String[] args) {
try {
Item item = new Item();
CompanyIdValue companyIdValue = new CompanyIdValue();
companyIdValue.setCompanyId("SomeId");
companyIdValue.setExternalValue("Some External value");
item.setCompanyIdValue(companyIdValue);
item.setCountryCodes(Arrays.asList("A", "B"));
item.setTitle("Some Title");
JAXBContext jaxbContext = JAXBContext.newInstance(Item.class);
Marshaller jaxbMarshaller = jaxbContext.createMarshaller();
jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
jaxbMarshaller.marshal(item, System.out);
} catch (JAXBException e) {
e.printStackTrace();
}
}
}
I have a XML response from REST API like below :
<?xml version="1.0" encoding="UTF-8"?>
<ns2:testpla xmlns:ns2="http:xyz" xmlns:ns7="xyz">
<ns2:category term="Default Category" value="Default Category Value"/>
<ns2:testase ns7:resource="https://www.cyz.com" units="PH"
href="ww.com">XYZ</ns2:testase>
<ns2:testase ns7:resource="https://ww.cyz.com" units="LH"
href="ww.org">AZ</ns2:testase>
<com.abc xmlns="http://lq.net" extensionDisplayName="QWZ-KEY-TP-TEST-ZWE-
TI">
<div xmlns="http://www.w3.org/1999/xhtml">TriggerA ND confirm the
functionality</div>
</com.abc>
</ns2:testpla>
I know how to get the xml element value ie"XYZ"using jaxb and bind to bean. But I'm stuck on know how to fetch the value of resource(ie;"https://www.cyz.com"),units("PH"),href("ww.com"),value of xmlns inside div ?And then to map the value to object property.
Please help me.
create the separate two classes for testpla and testase
Testpla.java
#XmlRootElement(name = "ns2:testpla")
public class Testpla {
private Testase testase;
public Testase getTestase() {
return testase;
}
#XmlElement(name = "ns2:testase")
public void setTestase(Testase testase) {
this.testase = testase;
}
}
Testase.java
#XmlRootElement(name = "ns2:testase")
public class Testase {
private String resource;
private String units;
public String getResource() {
return resource;
}
#XmlAttribute(name = "ns7:resource")
public void setResource(String resource) {
this.resource = resource;
}
public String getUnits() {
return units;
}
#XmlAttribute(name = "units")
public void setUnits(String units) {
this.units = units;
}
}
I'm trying to unmarshal existing xml file so that i can handle the data properly but the XML structure looks weird. below is the sample of the xml together with the objects I've created.
<?xml version="1.0" encoding="UTF-8"?>
<Record>
<identifier>11</identifier>
<TotalRecords>266</TotalRecords>
<ListOfSections>
<SECTION>AA1001</SECTION>
<ListOfStudents>
<SequenceNumber>11</SequenceNumber>
<RecordCount>1</RecordCount>
<StudentId>201614354</StudentId>
</ListOfStudents>
<SECTION>AA1002</SECTION>
<ListOfStudents>
<SequenceNumber>15</SequenceNumber>
<RecordCount>1</RecordCount>
<StudentId>201614356</StudentId>
<SequenceNumber>16</SequenceNumber>
<RecordCount>2</RecordCount>
<StudentId>201614355</StudentId>
</ListOfStudents>
</ListOfSections>
</Record>
Below are my java classes. I just removed the variables for readability.
#XmlRootElement
public class Record {
#XmlElement(name = "TotalRecords")
public Integer getTotalNoOfRecords() {
return totalNoOfRecords;
}
#XmlElement(name = "ListOfSections")
public List<Section> getSectionList() {
return sectionList;
}
}
#XmlRootElement
public class Section {
#XmlElement(name = "SECTION")
public String getSection() {
return section;
}
#XmlElement(name = "ListOfStudents")
public List<Student> getStudentList() {
return studentList;
}
}
#XmlRootElement
public class Student {
#XmlElement(name = "SequenceNumber")
public Integer getSequenceNumber() {
return sequenceNumber;
}
#XmlElement(name = "RecordCount")
public Integer getRecordCount() {
return recordCount;
}
#XmlElement(name = "StudentId")
public Integer getStudentId() {
return studentId;
}
}
I was trying to get all the records within the ListOfSections tag but I'm only getting the last section which is AA1002.
for the ListOfStudents I'm only getting the first record in my case I'm only getting record with sequence number 15
<SequenceNumber>12</SequenceNumber>
<RecordCount>2</RecordCount>
<StudentId>201614355</StudentId>
This simplified code works with your xml, it should give you a hint where to look for the problem:
class Record {
#XmlElementWrapper(name="ListOfSections")
#XmlElement(name="SECTION")
List<String> listOfSections;
}
here how to run:
Record r = JAXB.unmarshal(new File("1.xml"), Record.class);
System.out.println(r.listOfSections);
result:
[AA1001, AA1002]
I'm not getting my "announcements" when I try to parse messages like these:
<?xml version="1.0" encoding="UTF-8"?>
<message messageType="SUBSCRIBER" messageName="ANNOUNCEMENT">
<announcement time="12:30">
Lunchtime!
</announcement>
<announcement time="32:00">
Good night ...
</announcement>
<errorText>Phone number missing, subscriber: Dick</errorText>
</message>
The JAXB Java class seemed pretty straightforward. And is based on similar messages that work. In this case the difference seems to be that I can have two different types of nested element (XmlElement) in the main block.
The code below actually parses the XML but it doesn't call the Announcement.setMessageText() method. Whereas I can see that the time attribute is set from the XML and I have an array size=2 for announcements, it reads and sets the single errorText XmlElement. Btw, I also removed the tag from the code and XML -- Not change in treatment of my messageText. Ideas welcome!
#XmlRootElement(name = "message")
public class AnnouncementMessage
{
#XmlAttribute
public String getMessageName(){
return this.messageName;
}
public void setMessageName( String name ){
this.messageName = name;
}
#XmlAttribute
public String getMessageType(){
return messageType;
}
public void setMessageType( String newMessageType ){
this.messageType = newMessageType;
}
#XmlElement(name = "errorText")
public String getErrorText(){
return errorText;
}
public void setErrorText( String newMsg ){
this.errorText = newMsg;
}
private List<Announcement> announcements = new ArrayList<>();
#XmlElement(name = "announcement")
public List<Announcement> getAnnouncements(){
return this.announcements;
}
public void setAnnouncements( List<Announcement> newAnnouncements ){
this.announcements = newAnnouncements;
}
}
And the Announcement class:
#XmlRootElement(name = "announcement")
public class Announcement
{
private String messageText = "";
private String time = "12:00";
XmlAttribute(name ="time")
public String getTime(){
return this.time;
}
public void setTime( String newMsg ){
this.messageText = time;
}
#XmlElement(name="announcement")
public String getMessageText(){
return this.messageText;
}
public void setMessageText( String newMsg ){
this.messageText = newMsg;
}
Announcement(){
}
}
Using the name parameter in the for the XmlElement seem to make no difference. My thanks in advance.
Use the #XmlValue annotation for the message text:
#XmlValue
public String getMessageText(){
return this.messageText;
}
Additionally, as noted in this related answer by OP, an #XmlAccessorType(XmlAccessType.NONE) is needed on the Announcement class if it contains getter/setter pairs that are not mapped to/from XML and don't have an #XmlTransient annotation.
I am converting xml file to java object using simpleframework. I am using generics since my xml's internal nodes gets changing. But simpleframework throws an error while converting. Here is my sample code:
#Root(name = "searchresult", strict = false)
public class ResponseVO<T>
{
#ElementList(entry = "document", inline = true)
public List<T> elementVOList = new ArrayList<T>();
public List<T> getElementsVOList()
{
return elementVOList;
}
public void setElementsVOList(List<T>list)
{
elementVOList = list;
}
}
ResponseVO is container for various other VOs as below:
#Root(name = "document", strict = false)
public class Projects_Display_VO
{
#Element(name = "projectname")
private String projectName;
#Attribute(name = "id")
private int tmpid;
public int getTmpid()
{
return tmpid;
}
public void setTmpid(int tmpid)
{
this.tmpid = tmpid;
}
/**
* ProjectId
*/
#Element(name = "projectid")
private String projectID;
public String getProjectName()
{
return projectName;
}
public void setProjectName(String projectName)
{
this.projectName = projectName;
}
public int getProjectID()
{
return Integer.parseInt(projectID);
}
public void setProjectID(String projectID)
{
this.projectID = projectID;
}
}
And the XML file is as below:
<searchresult>
<query>id:(PROJ2 PROJ6)</query>
<document id="0">
<projectid>2</projectid>
<projectname>Redundant Demo Project</projectname>
<doctype>Projects</doctype>
<summary>||Demo Project</summary>
<title>Redundant Demo Project</title>
</document>
<document id="1">
<projectid>6</projectid>
<projectname>Redundant Demo Project2</projectname>
<doctype>Projects</doctype>
<summary>||Main terminal links.</summary>
<title>Terminal 5 Project</title>
</document>
</searchresult>
The code for conversion is as bellow:
ResponseVO<Projects_Display_VO> resp = (ResponseVO<Projects_Display_VO>) SerializationUtil.deserialize(ResponseVO.class, reader);
Here i am using serializer from simpleframework. But it throws following error
Exception::Attribute 'id' does not have a match in class java.lang.Object at line 5
org.simpleframework.xml.core.AttributeException: Attribute 'id' does not have a match in class java.lang.Object at line 5
at org.simpleframework.xml.core.Composite.readAttribute(Composite.java:555)
at org.simpleframework.xml.core.Composite.readAttributes(Composite.java:474)
at org.simpleframework.xml.core.Composite.readSection(Composite.java:387)
I dont know whats going wrong here.A it works fine without generics.
Thanks in advance
This is caused by erasure, T is not available at runtime. Java does not allow it.