XStream.fromXML in a JSP page throwing CannotResolveClassException

[someuser]

Hello,

I have this existing code in JSP (that I am trying to use fromXML) directly inside the JSP page (that is one of the requirements, I am not allowed to use Servlets, only JSPs, I know JSP gets compiled into a Servlet).

I have done the following:

<%@ page import="com.thoughtworks.xstream.XStream"%>

<%@ page import="com.thoughtworks.xstream.io.xml.DomDriver"%>

<%@ page import="com.thoughtworks.xstream.annotations.XStreamAlias"%>

<%@ page import="com.thoughtworks.xstream.annotations.XStreamAsAttribute"%>

<%!

@XStreamAlias("InstanceParameter")

public static class InstanceParameter {

    @XStreamAlias("ID") @XStreamAsAttribute

    public String id;

    @XStreamAlias("Value") @XStreamAsAttribute

    public String value;

}

%>

<%

InstanceParameter testA = new InstanceParameter();

testA.id = "Hello";

testA.value = "World";

// This works. Returns <InstanceParameter ID="Hello" Value="World" />

XStream stream = new XStream(new DomDriver());

stream.processAnnotations(InstanceParameter .class);

stream.toXML(testA);

// This does not work. 

stream.fromXML("<InstanceParameter ID=\"Hello\" Value=\"World\" />");

%>

The exception I am getting is the following:

com.thoughtworks.xstream.mapper.CannotResolveClassException: org.apache.jsp.rulesTranslator_jsp$InstanceParameter : org.apache.jsp.rulesTranslator_js

$InstanceParameter

        at com.thoughtworks.xstream.mapper.DefaultMapper.realClass(DefaultMapper.java:68)

        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38)

        at com.thoughtworks.xstream.mapper.DynamicProxyMapper.realClass(DynamicProxyMapper.java:71)

        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38)

        at com.thoughtworks.xstream.mapper.PackageAliasingMapper.realClass(PackageAliasingMapper.java:88)

        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38)

        at com.thoughtworks.xstream.mapper.ClassAliasingMapper.realClass(ClassAliasingMapper.java:86)

        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38)

        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38)

        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38)

        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38)

        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38)

        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38)

        at com.thoughtworks.xstream.mapper.ArrayMapper.realClass(ArrayMapper.java:96)

        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38)

        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38)

        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38)

        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38)

        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38)

        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38)

        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38)

        at com.thoughtworks.xstream.mapper.CachingMapper.realClass(CachingMapper.java:52)

        at com.thoughtworks.xstream.core.util.HierarchicalStreams.readClassType(HierarchicalStreams.java:29)

        at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:136)

        at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:33)

        at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:923)

        at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:909)

        at com.thoughtworks.xstream.XStream.fromXML(XStream.java:853)

        at com.thoughtworks.xstream.XStream.fromXML(XStream.java:845)

        at org.apache.jsp.rulesTranslator_jsp$RuleExtractor.getSaveRuleXML(rulesTranslator_jsp.java:955)

        at org.apache.jsp.rulesTranslator_jsp$RuleExtractor.process(rulesTranslator_jsp.java:1148)

        at org.apache.jsp.rulesTranslator_jsp._jspService(rulesTranslator_jsp.java:1229)

Any help is appreciated. I am really puzzling, it works fine in Normal Java, but within a JSP page it doesn't (Just the fromXML part)

[Jörg Schaible-2]

Hi Mohamed,

Mohamed Mansour wrote:

> Hello,
>
> I have this existing code in JSP (that I am trying to use fromXML)
> directly inside the JSP page (that is one of the requirements, I am not
> allowed to use Servlets, only JSPs, I know JSP gets compiled into a
> Servlet).

[snip]

Can you please use the user's list for this type of questions?

Thanks,
Jörg


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