JAXB unmarshalling returns 'URI is not absolute' error

Question 1

The following line is what's causing you the problem:

JAXB.unmarshal(sm.toString(), SearchFlightsResponse.class);

The result of sm.toString() is going to be something like the following and not a String representation of the XML.

com.sun.xml.internal.messaging.saaj.soap.ver1_2.Message1_2Impl@693f23a2

What you are doing now is the equivalent of doing the following:

import javax.xml.bind.JAXB;

public class Demo {

    public static void main(String[] args) throws Exception {
        JAXB.unmarshal("com.sun.xml.internal.messaging.saaj.soap.ver1_2.Message1_2Impl@693f23a2", Foo.class);  
    }
}

Which will return the following exception:

Exception in thread "main" java.lang.IllegalArgumentException: URI is not absolute
    at java.net.URI.toURL(URI.java:1095)
    at javax.xml.bind.JAXB.toSource(JAXB.java:291)
    at javax.xml.bind.JAXB.unmarshal(JAXB.java:205)
    at forum23652823.Demo.main(Demo.java:8)

Note

The String parameter in the JAXB.unmarshal(String, Class) method is the location of the XML, and not the XML itself. This is why the exception is complaining about a URI.

http://docs.oracle.com/javase/7/docs/api/javax/xml/bind/JAXB.html#unmarshal%28java.lang.String,%20java.lang.Class%29

Question 2

The XML response you are receiving back from the SOAP service is not valid XML. The xmlns attribute is required to be an absolute URI.

This means the namespace name must be in the form: <scheme>:<scheme-specific-part>

In order for the XML to be valid, the service you are calling should be sending back urn:ElsyArres.API as the namespace value.

<SearchFlightsResponse xmlns="urn:ElsyArres.API">

Your package-info file would then look like the following:

@XmlSchema( 
    namespace = "urn:ElsyArres.API", 
    elementFormDefault = XmlNsForm.QUALIFIED) 
package com.myProject.wegolo

import javax.xml.bind.annotation.XmlNsForm;
import javax.xml.bind.annotation.XmlSchema;

If you cannot get the service to fix the URI issue you can remove it while unmarshalling through the use of a SAXFilter. Here is a great example that supports both adding and removing namespaces during unmarshalling: https://stackoverflow.com/a/2148541/73446

Question 3

When doing unmarshalling I am parsing the xml file and giving the only class element. For your case: give following string to unmarshaller, this saves you many boring errors. After that, if you are getting an error you can try to remove xmlns="ElsyArres.API" also. Namespace things may generate errors too.

    <SearchFlightsResponse xmlns="ElsyArres.API">
        <SoapMessage>
            <Username>TEST</Username>
            <Password>TESTs</Password>
            <LanguageCode>EN</LanguageCode>
            <ErrorMessage />
            <ErrorCode>0</ErrorCode>
            <AppVersion>8.0.3</AppVersion>
            <Request>
                <Departure>FDH</Departure>
                <Destination>HAM</Destination>
                <DepartureDate>2014-08-08</DepartureDate>
                <ReturnDate />
                <NumADT>1</NumADT>
                <NumINF>0</NumINF>
                <NumCHD>0</NumCHD>
                <CurrencyCode>EUR</CurrencyCode>
                <CarrierList />
                <FareClasses />
                <Providers />
                <WaitForResult>true</WaitForResult>
                <NearbyDepartures>true</NearbyDepartures>
                <NearbyDestinations>true</NearbyDestinations>
                <RROnly>false</RROnly>
                <MetaSearch>true</MetaSearch>
            </Request>
            <Response>
                <SearchFlightId>140514114543-02-43064-52</SearchFlightId>
                <Roundtrip>false</Roundtrip>
                <CurrencyCode>EUR</CurrencyCode>
                <Flights>
                    <Flight>
                        <Outbound>
                            <CarName>Inter Sky</CarName>
                            <CarCode>3L</CarCode>
                            <DepName>Friedrichshafen</DepName>
                            <DepCode>FDH</DepCode>
                            <DestName>Hamburg</DestName>
                            <DestCode>HAM</DestCode>
                            <Duration>01:45</Duration>
                            <FlightNo>3L370</FlightNo>
                            <DepDateTime>2014-08-08T06:10:00</DepDateTime>
                            <ArrDateTime>2014-08-08T07:55:00</ArrDateTime>
                            <Legs>
                                <Leg>
                                    <Sequence>0</Sequence>
                                    <FlightNo>3L370</FlightNo>
                                    <DepCode>FDH</DepCode>
                                    <DepName>Friedrichshafen</DepName>
                                    <DestCode>HAM</DestCode>
                                    <DestName>Hamburg</DestName>
                                    <DepTime>06:10</DepTime>
                                    <ArrTime>07:55</ArrTime>
                                    <CarCode>3L</CarCode>
                                    <CarName>Inter Sky</CarName>
                                    <FareClass>Economy</FareClass>
                                    <ArrDateTime>2014-08-08T07:55:00</ArrDateTime>
                                    <DepDateTime>2014-08-08T06:10:00</DepDateTime>
                                </Leg>
                            </Legs>
                            <Taxes>0</Taxes>
                            <FareADT>6500</FareADT>
                            <FareCHD>0</FareCHD>
                            <FareINF>0</FareINF>
                            <MiscFees>6400</MiscFees>
                            <Idx>307963</Idx>
                            <FareClass>Economy</FareClass>
                            <FareType>Web</FareType>
                            <FareId>3L0</FareId>
                        </Outbound>
                        <BagFee>0</BagFee>
                        <CcFee>600</CcFee>
                        <HandlingFee>500</HandlingFee>
                        <TotalFare>12900</TotalFare>
                        <FlightId>140514114543-02-21212-2</FlightId>
                        <Link2Book>http://sample.com</Link2Book>
                        <Provider>ElsyArres</Provider>
                    </Flight>
                    <Flight>
                        <Outbound>
                            <CarName>Inter Sky</CarName>
                            <CarCode>3L</CarCode>
                            <DepName>Friedrichshafen</DepName>
                            <DepCode>FDH</DepCode>
                            <DestName>Hamburg</DestName>
                            <DestCode>HAM</DestCode>
                            <Duration>01:45</Duration>
                            <FlightNo>3L376</FlightNo>
                            <DepDateTime>2014-08-08T18:00:00</DepDateTime>
                            <ArrDateTime>2014-08-08T19:45:00</ArrDateTime>
                            <Legs>
                                <Leg>
                                    <Sequence>0</Sequence>
                                    <FlightNo>3L376</FlightNo>
                                    <DepCode>FDH</DepCode>
                                    <DepName>Friedrichshafen</DepName>
                                    <DestCode>HAM</DestCode>
                                    <DestName>Hamburg</DestName>
                                    <DepTime>18:00</DepTime>
                                    <ArrTime>19:45</ArrTime>
                                    <CarCode>3L</CarCode>
                                    <CarName>Inter Sky</CarName>
                                    <FareClass>Economy</FareClass>
                                    <ArrDateTime>2014-08-08T19:45:00</ArrDateTime>
                                    <DepDateTime>2014-08-08T18:00:00</DepDateTime>
                                </Leg>
                            </Legs>
                            <Taxes>0</Taxes>
                            <FareADT>10500</FareADT>
                            <FareCHD>0</FareCHD>
                            <FareINF>0</FareINF>
                            <MiscFees>6400</MiscFees>
                            <Idx>307964</Idx>
                            <FareClass>Economy</FareClass>
                            <FareType>Web</FareType>
                            <FareId>3L0</FareId>
                        </Outbound>
                        <BagFee>0</BagFee>
                        <CcFee>600</CcFee>
                        <HandlingFee>500</HandlingFee>
                        <TotalFare>16900</TotalFare>
                        <FlightId>140514114543-02-21212-3</FlightId>
                        <Link2Book>http://sample.com</Link2Book>
                        <Provider>ElsyArres</Provider>
                    </Flight>
                </Flights>
            </Response>
        </SoapMessage>
    </SearchFlightsResponse>