I wrote this custom IDResolver:
final class MyIDResolver extends IDResolver {
Map<String, Course> courses = new HashMap<>();
/**
* #see com.sun.xml.bind.IDResolver#bind(java.lang.String, java.lang.Object)
*/
#Override
public void bind(String id, Object obj) throws SAXException {
if (obj instanceof Course)
courses.put(id, (Course)obj);
else
throw new SAXException("This " + obj.toString() + " cannot found");
}
/**
* #see com.sun.xml.bind.IDResolver#resolve(java.lang.String, java.lang.Class)
*/
#Override
public Callable<?> resolve(final String id, final Class targetType) throws SAXException {
return new Callable<Object>() {
#Override
public Object call() throws Exception {
if (targetType == Course.class)
return courses.get(id);
else
throw new ClassNotFoundException(targetType.toString() + " cannot found");
}
};
}
}
And I have two classes like:
#XmlRootElement(name = "course")
public class Course {
#XmlID
#XmlAttribute
private String id;
#XmlAttribute
private int units;
#XmlAttribute
private Level level;
#XmlAttribute
private String name;
#XmlIDREF
#XmlElement(name = "pre")
private ArrayList<Course> prerequisite;
#XmlIDREF
#XmlElement(name = "co")
private ArrayList<Course> corequisite;
}
#XmlRootElement(name = "dept")
#XmlAccessorType(XmlAccessType.FIELD)
public final class Department {
#XmlAttribute
private String name;
#XmlElementWrapper(name = "courses")
#XmlElement(name = "course")
private ArrayList<Course> courses;
}
And sample XML like this:
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<dept name="ece">
<courses>
<course id="1" units="4" level="UNDERGRADUATE" name="Fundamentals of Programming"/>
<course id="2" units="3" level="UNDERGRADUATE" name="Advanced Programming">
<pre>1</pre>
</course>
</courses>
</dept>
And a simple main like this:
unmarshaller.unmarshal(new FileReader(arg0))
context = JAXBContext.newInstance(Department.class);
unmarshaller = context.createUnmarshaller();
unmarshaller.setProperty(IDResolver.class.getName(), new MyIDResolver());
The resolve() method of a custom IDResolver gets Object.class as targetType. But it should be Course.class. This results in wrong ID resolving. Where is my problem?
You should not use IDResolve when Department contains course. It should be used when Department want to reference to a Course. So for this reason when jaxb arrives a course inside of a department that it contains an element (here <pre>) it will pass object.class to your resolve function.
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 using JAXB for creating xml. I want to set attribute 'lang' on elements PrimaryValue and AlternativeSpelling.
<AgencyOrUnit>
<PrimaryValue lang="el">ΓΑΔΑ</PrimaryValue>
<AlternativeSpelling lang="en">Athens General Police Directorate</AlternativeSpelling>
</AgencyOrUnit>
Here's my code:
#XmlRootElement(name = "OwnerReference")
#XmlType(propOrder = { "primaryValue", "alternativeSpelling"})
public class AgencyOrUnit {
private String PrimaryValue;
private String AlternativeSpelling;
public String getPrimaryValue() {
return PrimaryValue;
}
public void setPrimaryValue(String PrimaryValue){
this.PrimaryValue = PrimaryValue;
}
public String getAlternativeSpelling() {
return AlternativeSpelling;
}
public void setAlternativeSpelling(String AlternativeSpelling){
this.AlternativeSpelling = AlternativeSpelling;
}
}
Here's process of marshalling:
AgencyOrUnit agencyOrUnit = new AgencyOrUnit();
agencyOrUnit.setPrimaryValue("ΓΑΔΑ");
agencyOrUnit.setAlternativeSpelling("General Police");
The problem is that I don't know how to set property with value on elements primaryValue and alternativeSpelling?
You can use annotations #XmlValue & #XmlAttribute but you need to create a new class to hold both lang and the original value string. Something like this:
#Setter
#AllArgsConstructor
public class LocaleString {
private String lang;
private String value;
#XmlAttribute
public String getLang() {
return lang;
}
#XmlValue
public String getValue() {
return value;
}
}
Then modify your AgencyOrUnit accordingly:
#XmlRootElement(name = "OwnerReference")
#XmlType(propOrder = { "primaryValue", "alternativeSpelling"})
#Getter #Setter
public class AgencyOrUnit {
private LocaleString PrimaryValue;
private LocaleString AlternativeSpelling;
}
Test it:
#Test
void test() throws JAXBException {
AgencyOrUnit agencyOrUnit = new AgencyOrUnit();
agencyOrUnit.setPrimaryValue(new LocaleString("el", "ΓΑΔΑ"));
agencyOrUnit.setAlternativeSpelling(new LocaleString("en", "General Police"));
JAXBContext ctx = JAXBContext.newInstance(AgencyOrUnit.class);
Marshaller marshaller = ctx.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
marshaller.marshal(agencyOrUnit, System.out);
}
and you should see this:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<OwnerReference>
<primaryValue lang="el">ΓΑΔΑ</primaryValue>
<alternativeSpelling lang="en">General Police</alternativeSpelling>
</OwnerReference>
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 trying to deserialize an xml string with SimpleXML, i've looked at their examples but i'm not really sure that wether i grasp the concept or not.
Sample XML (validates):
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body>
<Response xmlns="http://localhost/webservices/">
<Result>
<Item><ID>0</ID><language /><price>168</price></Item>
<Item><ID>1</ID><language /><price>178</price></Item>
<Item><ID>2</ID><language /><price>195</price></Item>
<Item><ID>3</ID><language /><price>169</price></Item>
<Item><ID>4</ID><language /><price>178</price></Item>
<Item><ID>5</ID><language /><price>178</price></Item>
<Item><ID>6</ID><language /><price>149</price></Item>
<Item><ID>7</ID><language /><price>178</price></Item>
<Item><ID>8</ID><language /><price>168</price></Item>
<Item><ID>9</ID><language /><price>179</price></Item>
<Item><ID>10</ID><language /><price>147</price></Item>
<Item><ID>11</ID><language /><price>165</price></Item>
<Item><ID>12</ID><language /><price>192</price></Item>
<Item><ID>13</ID><language /><price>218</price></Item>
<Item><ID>14</ID><language /><price>144</price></Item>
<Item><ID>15</ID><language /><price>141</price></Item>
</Result>
</Response>
</soap:Body></soap:Envelope>
And the java code:
#Root(name="Result",strict=false)
public class ItemList {
#ElementList(entry="Item")
private List<Item> _list;
public List<Book> GetItemList()
{
return _list;
}
public void SetItemList(List<Item> value)
{
this._list = value;
}
}
#Root(strict=false)
public class Item {
#Element(name="ID")
private String _ID;
#Element(name="price")
private String _price;
public String GetPrice()
{
return _price;
}
public void SetPrice(String value)
{
this._price = value;
}
public String GetID()
{
return _ID;
}
public void SetID(String value)
{
this._ID = value;
}
public Item(String ID,
String price)
{
this._ID = ID;
this._price = price;
}
}
Any help is appreciated.
I have a suggestion, but it's not ready to run (see below). However, ther maybe another, better solution ...
Class Item
Holding all your informations.
#Root(name="Item")
public class Item
{
#Element(name="ID", required=true)
private int id;
#Element(name="language", required=true)
private String language;
#Element(name="price", required=true)
private int price;
// ...
}
Class Result
Constructing everything around Item. Btw. you dont have to use inner classes here.
#Namespace(prefix="soap", reference="http://schemas.xmlsoap.org/soap/envelope/")
#Root(name="Envelope")
public class Result
{
#Namespace(prefix="soap")
#Element(name="Body")
private SoapBody body;
// ...
// -----------------------------------------------------------------
// -- Some inner classes, constructing the elements as in you xml --
// -----------------------------------------------------------------
#Namespace(prefix="soap")
#Root(name="Body")
static class SoapBody
{
#Element(name="Response")
private Response response;
// ...
}
#Root(name="Response")
static class Response
{
#ElementList(name="Result", required=true)
private List<Item> result;
// ...
}
}
(Example) How to use this code
Writing
File f = ...
Serializer ser = new Persister();
Result r = new Result();
ser.write(r, f);
Reading
File f = ...
Serializer ser = new Persister();
Result r = ser.read(Result.class, f);
Now ... there's one problem which prevents this example from running: <language />
This empty Element let SimpleXML throw a ValueRequiredException.
#Element( required=false)
private String language;
Add this in your Item class and generate the getter and setter.I think it should work