I should have skipped to the end of your mail... Seeing the XML schema
(which I didn't expect from what you wrote), the usual procedure is to
generate Java classes from that. Trying to adapt existing Java classes to a
schema is possible, but you'll need to write more annotations, e.g.
@XmlTransient to ignore some properties.
Using xjc to generate Java classes might be the best way for a beginner. If
your application needs more sophisticated classes for processing, consider
writing a simple "bridge", both ways if required.
-W
On 10 January 2012 08:39, Wolfgang Laun <wolfgang.laun_at_gmail.com> wrote:
> Marshalling and unmarshalling puts some contraints and requirements on the
> Java classes. "same name" and "must have a no-arg default constructor"
> are just two examples.
>
> The JAXB tutorial<http://jaxb.java.net/tutorial/section_5_1-Customizing.htm>should get you started.
>
> From a quick look at the error messages I get the impression that
> refactoring might be one way to improve; other than this, annotation
> parameters must be used to resolve ambiguities. Also, some Java API classes
> aren't fit for (un)marshalling at all, and you'd be better off to avoid
> them, although advanced techniques might get you around some of these
> obstacles.
>
> -W
>
>
> On 10 January 2012 01:32, Stephan Zednik <zednis_at_rpi.edu> wrote:
>
>> Problem: I get the following error message when trying to instantiate
>> a org.springframework.oxm.jaxb.Jaxb2Marshaller.
>>
>> This is my first time trying to use JAXB so I am not sure what
>> annotations I need for a basic setup, nor how to ensure my XML is mapped
>> appropriately. It seems I am missing some annotations, so I added
>> @XmlElement(name="") annotations to the class members, but that did not fix
>> the problem.
>>
>> How should I correctly annotate GmlEnvelope? What annotations must I add
>> to all my classes-to-be-bound? What setup (classes & annotations) would
>> best bind to the provided example XML?
>>
>> I am also not sure my class organization fits the XML structure very
>> well, and could use suggestions on improvement.
>>
>> Thanks,
>> Stephan
>>
>> === TEST FAIL OUTPUT ===
>>
>> Tests in error:
>>
>> testUnmarshalling(edu.rpi.tw.mdsa.model.AnalysisSettingsUnmarshallerTest):
>> Error creating bean with name 'analysisSettingsMarshaller' defined in class
>> path resource [model-context.xml]: Invocation of init method failed; nested
>> exception is org.springframework.oxm.UncategorizedMappingException: Unknown
>> JAXB exception; nested exception is
>> com.sun.xml.internal.bind.v2.runtime.IllegalAnnotationsException: 8 counts
>> of IllegalAnnotationExceptions
>> sun.util.calendar.Era does not have a no-arg default constructor.
>> this problem is related to the following location:
>> at sun.util.calendar.Era
>> at public sun.util.calendar.Era sun.util.calendar.CalendarDate.getEra()
>> at sun.util.calendar.CalendarDate
>> at sun.util.calendar.BaseCalendar$Date
>> at sun.util.calendar.LocalGregorianCalendar$Date
>> at private sun.util.calendar.LocalGregorianCalendar$Date
>> edu.rpi.tw.mdsa.model.TimePeriod.startTime
>> at edu.rpi.tw.mdsa.model.TimePeriod
>> Two classes have the same XML type name "date". Use @XmlType.name and
>> @XmlType.namespace to assign different names to them.
>> this problem is related to the following location:
>> at sun.util.calendar.BaseCalendar$Date
>> at sun.util.calendar.LocalGregorianCalendar$Date
>> at private sun.util.calendar.LocalGregorianCalendar$Date
>> edu.rpi.tw.mdsa.model.TimePeriod.startTime
>> at edu.rpi.tw.mdsa.model.TimePeriod
>> this problem is related to the following location:
>> at sun.util.calendar.LocalGregorianCalendar$Date
>> at private sun.util.calendar.LocalGregorianCalendar$Date
>> edu.rpi.tw.mdsa.model.TimePeriod.startTime
>> at edu.rpi.tw.mdsa.model.TimePeriod
>> Class has two properties of the same name "lowerLat"
>> this problem is related to the following location:
>> at public double edu.rpi.tw.mdsa.model.gis.GmlEnvelope.getLowerLat()
>> at edu.rpi.tw.mdsa.model.gis.GmlEnvelope
>> this problem is related to the following location:
>> at private double edu.rpi.tw.mdsa.model.gis.GmlEnvelope.lowerLat
>> at edu.rpi.tw.mdsa.model.gis.GmlEnvelope
>> Class has two properties of the same name "lowerLon"
>> this problem is related to the following location:
>> at public double edu.rpi.tw.mdsa.model.gis.GmlEnvelope.getLowerLon()
>> at edu.rpi.tw.mdsa.model.gis.GmlEnvelope
>> this problem is related to the following location:
>> at private double edu.rpi.tw.mdsa.model.gis.GmlEnvelope.lowerLon
>> at edu.rpi.tw.mdsa.model.gis.GmlEnvelope
>> Class has two properties of the same name "upperLat"
>> this problem is related to the following location:
>> at public double edu.rpi.tw.mdsa.model.gis.GmlEnvelope.getUpperLat()
>> at edu.rpi.tw.mdsa.model.gis.GmlEnvelope
>> this problem is related to the following location:
>> at private double edu.rpi.tw.mdsa.model.gis.GmlEnvelope.upperLat
>> at edu.rpi.tw.mdsa.model.gis.GmlEnvelope
>> Class has two properties of the same name "upperLon"
>> this problem is related to the following location:
>> at public double edu.rpi.tw.mdsa.model.gis.GmlEnvelope.getUpperLon()
>> at edu.rpi.tw.mdsa.model.gis.GmlEnvelope
>> this problem is related to the following location:
>> at private double edu.rpi.tw.mdsa.model.gis.GmlEnvelope.upperLon
>> at edu.rpi.tw.mdsa.model.gis.GmlEnvelope
>> Class has two properties of the same name "endTime"
>> this problem is related to the following location:
>> at public sun.util.calendar.LocalGregorianCalendar$Date
>> edu.rpi.tw.mdsa.model.TimePeriod.getEndTime()
>> at edu.rpi.tw.mdsa.model.TimePeriod
>> this problem is related to the following location:
>> at private sun.util.calendar.LocalGregorianCalendar$Date
>> edu.rpi.tw.mdsa.model.TimePeriod.endTime
>> at edu.rpi.tw.mdsa.model.TimePeriod
>> Class has two properties of the same name "startTime"
>> this problem is related to the following location:
>> at public sun.util.calendar.LocalGregorianCalendar$Date
>> edu.rpi.tw.mdsa.model.TimePeriod.getStartTime()
>> at edu.rpi.tw.mdsa.model.TimePeriod
>> this problem is related to the following location:
>> at private sun.util.calendar.LocalGregorianCalendar$Date
>> edu.rpi.tw.mdsa.model.TimePeriod.startTime
>> at edu.rpi.tw.mdsa.model.TimePeriod
>>
>>
>> Context:
>>
>> I would like to configure a JAXB Marshaller for the following XML for use
>> in a Spring 3.0 enabled project.
>>
>> === Example XML ===
>>
>> <?xml version="1.0" encoding="UTF-8"?>
>> <AnalysisSettings>
>> <service id="urn:nasa:giovanni:latlonplot"/>
>> <spatialExtent>
>> <GeoBoundingBox>
>> <south>20.0</south>
>> <north>90.0</north>
>> <west>0.0</west>
>> <east>180.0</east>
>> </GeoBoundingBox>
>> </spatialExtent>
>> <temporalExtent>
>> <TimePeriod>
>> <startTime>2008-01-01T00:00:00Z</startTime>
>> <endTime>2008-01-31T00:00:00Z</endTime>
>> </TimePeriod>
>> </temporalExtent>
>> <variables>
>> <Variable>
>> <dataset id="urn:nasa:modis:MYD08_D3.005"/>
>> <parameter id="urn:nasa:modis:Optical_Depth_Land_And_Ocean_Mean"/>
>> </Variable>
>> <Variable>
>> <dataset id="urn:nasa:modis:M0D08_D3.005"/>
>> <parameter id="urn:nasa:modis:Optical_Depth_Land_And_Ocean_Mean"/>
>> </Variable>
>> </variables>
>> </AnalysisSettings>
>>
>> I think this is the Spring 3.0 configuration I need:
>>
>> <bean id="analysisSettingsMarshaller" class=
>> "org.springframework.oxm.jaxb.Jaxb2Marshaller">
>> <property name="classesToBeBound">
>> <list>
>> <value>edu.rpi.tw.mdsa.model.AnalysisSettings</value>
>> <value>edu.rpi.tw.mdsa.model.Service</value>
>> <value>edu.rpi.tw.mdsa.model.SpatialExtent</value>
>> <value>edu.rpi.tw.mdsa.model.gis.GmlEnvelope</value>
>> <value>edu.rpi.tw.mdsa.model.TemporalExtent</value>
>> <value>edu.rpi.tw.mdsa.model.TimePeriod</value>
>> <value>edu.rpi.tw.mdsa.model.Variable</value>
>> <value>edu.rpi.tw.mdsa.model.Variables</value>
>> <value>edu.rpi.tw.mdsa.model.Parameter</value>
>> <value>edu.rpi.tw.mdsa.model.Dataset</value>
>> </list>
>> </property>
>> <property name="schema" value="classpath:schema/AnalysisSettings.xsd"
>> />
>> </bean>
>>
>> Note: not sure I need the SpatialExtent and TemporalExtent classes...
>>
>> === GmlEnvelope.java ===
>>
>> package edu.rpi.tw.mdsa.model.gis;
>>
>> import javax.xml.bind.annotation.XmlElement;
>> import javax.xml.bind.annotation.XmlType;
>>
>> @XmlType(name="GeoBoundingBox")
>> public class GmlEnvelope {
>>
>> @XmlElement(name="south")
>> private double lowerLat;
>>
>>
>> @XmlElement(name="west")
>> private double lowerLon;
>>
>>
>> @XmlElement(name="north")
>> private double upperLat;
>>
>>
>> @XmlElement(name="east")
>> private double upperLon;
>>
>>
>> public GmlEnvelope() { }
>>
>>
>> public GmlEnvelope(double lowerLat, double lowerLon, double upperLat,
>> double upperLon) {
>> this.setLowerLat(lowerLat);
>> this.setLowerLon(lowerLon);
>> this.setUpperLat(upperLat);
>> this.setUpperLon(upperLon);
>> }
>>
>> public double getLowerLat() {
>> return lowerLat;
>> }
>>
>> public void setLowerLat(double lowerLat) {
>> verifyLatitude(lowerLat);
>> this.lowerLat = lowerLat;
>> }
>>
>> public double getLowerLon() {
>> return lowerLon;
>> }
>>
>> public void setLowerLon(double lowerLon) {
>> verifyLongitude(lowerLon);
>> this.lowerLon = lowerLon;
>> }
>>
>> public double getUpperLat() {
>> return upperLat;
>> }
>>
>> public void setUpperLat(double upperLat) {
>> verifyLatitude(upperLat);
>> this.upperLat = upperLat;
>> }
>>
>> public double getUpperLon() {
>> return upperLon;
>> }
>>
>> public void setUpperLon(double upperLon) {
>> verifyLongitude(upperLon);
>> this.upperLon = upperLon;
>> }
>>
>>
>> private void verifyLatitude(double latitude) {
>> if(latitude > 90 || latitude < -90){
>> throw new RuntimeException("latitude value out of range: "+latitude);
>> }
>> }
>>
>>
>> private void verifyLongitude(double longitude) {
>> if(longitude > 180 || longitude < -180) {
>> throw new RuntimeException("longitude value out of range: "+longitude);
>> }
>> }
>> }
>>
>>
>> === XSD ===
>>
>> <?xml version="1.0" encoding="utf-8"?>
>> <xsd:schema attributeFormDefault="unqualified" elementFormDefault=
>> "qualified" version="1.0" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
>> <xsd:element name="AnalysisSettings" type="AnalysisSettingsType" />
>> <xsd:complexType name="AnalysisSettingsType">
>> <xsd:sequence>
>> <xsd:element name="service" type="serviceType" />
>> <xsd:element name="spatialExtent" type="spatialExtentType" />
>> <xsd:element name="temporalExtent" type="temporalExtentType" />
>> <xsd:element name="variables" type="variablesType" />
>> </xsd:sequence>
>> </xsd:complexType>
>> <xsd:complexType name="variablesType">
>> <xsd:sequence>
>> <xsd:element maxOccurs="unbounded" name="Variable" type=
>> "variableType" />
>> </xsd:sequence>
>> </xsd:complexType>
>> <xsd:complexType name="variableType">
>> <xsd:sequence>
>> <xsd:element name="dataset" type="datasetType" />
>> <xsd:element name="parameter" type="parameterType" />
>> </xsd:sequence>
>> </xsd:complexType>
>> <xsd:complexType name="parameterType">
>> <xsd:attribute name="id" type="xsd:anyURI" />
>> </xsd:complexType>
>> <xsd:complexType name="datasetType">
>> <xsd:attribute name="id" type="xsd:anyURI" />
>> </xsd:complexType>
>> <xsd:complexType name="temporalExtentType">
>> <xsd:sequence>
>> <xsd:element name="TimePeriod" type="TimePeriodType" />
>> </xsd:sequence>
>> </xsd:complexType>
>> <xsd:complexType name="TimePeriodType">
>> <xsd:sequence>
>> <xsd:element name="startTime" type="xsd:dateTime" />
>> <xsd:element name="endTime" type="xsd:dateTime" />
>> </xsd:sequence>
>> </xsd:complexType>
>> <xsd:complexType name="spatialExtentType">
>> <xsd:sequence>
>> <xsd:element name="GeoBoundingBox" type="GeoBoundingBoxType" />
>> </xsd:sequence>
>> </xsd:complexType>
>> <xsd:complexType name="GeoBoundingBoxType">
>> <xsd:sequence>
>> <xsd:element name="south" type="xsd:decimal" />
>> <xsd:element name="north" type="xsd:decimal" />
>> <xsd:element name="west" type="xsd:decimal" />
>> <xsd:element name="east" type="xsd:decimal" />
>> </xsd:sequence>
>> </xsd:complexType>
>> <xsd:complexType name="serviceType">
>> <xsd:attribute name="id" type="xsd:anyURI" />
>> </xsd:complexType>
>> </xsd:schema>
>>
>
>