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Posted to dev@tuscany.apache.org by "Adrian Padilla (JIRA)" <de...@tuscany.apache.org> on 2011/06/14 19:41:47 UTC
[jira] [Created] (TUSCANY-3874) Redundant namespace prefixes when
creating new components
Redundant namespace prefixes when creating new components
---------------------------------------------------------
Key: TUSCANY-3874
URL: https://issues.apache.org/jira/browse/TUSCANY-3874
Project: Tuscany
Issue Type: Bug
Components: Java SCA Assembly Model
Affects Versions: Java-SCA-1.5.1, Java-SCA-1.6.2
Environment: Windows XP, jre 1.6
Reporter: Adrian Padilla
I am creating a couple of components using the following code:
import java.io.FileOutputStream;
import java.util.List;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamWriter;
import org.apache.tuscany.sca.assembly.AssemblyFactory;
import org.apache.tuscany.sca.assembly.Component;
import org.apache.tuscany.sca.assembly.Composite;
import org.apache.tuscany.sca.assembly.xml.Constants;
import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessorExtensionPoint;
import org.apache.tuscany.sca.core.DefaultExtensionPointRegistry;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.implementation.widget.WidgetImplementation;
import org.apache.tuscany.sca.implementation.widget.WidgetImplementationFactory;
public class TuscanyCompositeSerializationTest {
public static void main(String[] args) throws Exception {
ExtensionPointRegistry registry = new DefaultExtensionPointRegistry();
ModelFactoryExtensionPoint factories = registry
.getExtensionPoint(ModelFactoryExtensionPoint.class);
AssemblyFactory assemblyFactory = factories.getFactory(AssemblyFactory.class);
XMLInputFactory xmlInputFactory = XMLInputFactory.newInstance();
XMLOutputFactory xmlOutputFactory = XMLOutputFactory.newInstance();
factories.addFactory(xmlOutputFactory);
factories.addFactory(xmlInputFactory);
QName qName = new QName("http://www.example.org", "test");
Composite composite = assemblyFactory.createComposite();
composite.setName(qName);
List<Component> components = composite.getComponents();
Component component = createWidgetComponent(factories, assemblyFactory,"A");
components.add(component);
component = createWidgetComponent(factories, assemblyFactory, "B");
components.add(component);
StAXArtifactProcessorExtensionPoint extensionPoint = registry
.getExtensionPoint(StAXArtifactProcessorExtensionPoint.class);
StAXArtifactProcessor<Composite> processor = extensionPoint
.getProcessor(new QName(Constants.SCA10_NS, Constants.COMPOSITE));
FileOutputStream fileOutputStream = new FileOutputStream(
"test.composite");
XMLStreamWriter streamWriter = xmlOutputFactory
.createXMLStreamWriter(fileOutputStream);
System.out.println(composite);
processor.write(composite, streamWriter);
fileOutputStream.close();
}
private static Component createWidgetComponent(
ModelFactoryExtensionPoint factories,
AssemblyFactory assemblyFactory, String name) {
Component component = assemblyFactory.createComponent();
component.setName(name);
WidgetImplementationFactory widgetFactory = factories
.getFactory(WidgetImplementationFactory.class);
WidgetImplementation widgetImpl = widgetFactory
.createWidgetImplementation();
widgetImpl.setLocation(name + ".html");
component.setImplementation(widgetImpl);
return component;
}
}
And the output of this run is:
<?xml version="1.0" encoding="UTF-8"?>
<composite targetNamespace="http://www.example.org" name="test" local="true" xmlns="http://www.osoa.org/xmlns/sca/1.0">
<component name="A">
<sp_0:implementation.widget
location="A.html"
xmlns:ns1="http://tuscany.apache.org/xmlns/sca/1.0"
xmlns:sp_0="http://tuscany.apache.org/xmlns/sca/1.0">
</sp_0:implementation.widget>
</component>
<component name="B">
<sp_1:implementation.widget
location="B.html"
xmlns:ns1="http://tuscany.apache.org/xmlns/sca/1.0"
xmlns:sp_1="http://tuscany.apache.org/xmlns/sca/1.0">
</sp_1:implementation.widget>
</component>
</composite>
Where http://tuscany.apache.org/xmlns/sca/1.0 is defined in every component I add to the composite.
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[jira] [Commented] (TUSCANY-3874) Redundant namespace prefixes when
creating new components
Posted by "Scott Kurz (JIRA)" <de...@tuscany.apache.org>.
[ https://issues.apache.org/jira/browse/TUSCANY-3874?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13051453#comment-13051453 ]
Scott Kurz commented on TUSCANY-3874:
-------------------------------------
I recreated this by using the XMLStreamWriter in WebSphere. So there's two levels you could approach this from.
1) the redundancy of two prefixes ns1 + sp_0, etc.for each implementation.widget element.
2) the fact that a single prefix can't be defined at an outer level, like the <composite> element, and used within.
2 might be trickier.. haven't given this much thought.. due to the independence of the StAXArtifactProcessor extensions.. not sure.
But 1) seems like it should be not so hard to fix.
Also note that I tried this with Woodstox running against the entire 1.7 distribution and instead saw the following problem:
Exception in thread "main" javax.xml.stream.XMLStreamException: Unbound namespace URI 'http://tuscany.apache.org/xmlns/sca/1.0'
at com.ctc.wstx.sw.SimpleNsStreamWriter.writeStartOrEmpty(SimpleNsStreamWriter.java:239)
at com.ctc.wstx.sw.BaseNsStreamWriter.writeStartElement(BaseNsStreamWriter.java:312)
at org.apache.tuscany.sca.contribution.processor.BaseStAXArtifactProcessor.writeStart(BaseStAXArtifactProcessor.java:291)
at org.apache.tuscany.sca.implementation.widget.WidgetImplementationProcessor.write(WidgetImplementationProcessor.java:164)
Not sure what the logic in BaseStAXArtifactProcessor relating to the prefixes is supposed to be doing, but that's where to look next I'm sure.
> Redundant namespace prefixes when creating new components
> ---------------------------------------------------------
>
> Key: TUSCANY-3874
> URL: https://issues.apache.org/jira/browse/TUSCANY-3874
> Project: Tuscany
> Issue Type: Bug
> Components: Java SCA Assembly Model
> Affects Versions: Java-SCA-1.5.1, Java-SCA-1.6.2
> Environment: Windows XP, jre 1.6
> Reporter: Adrian Padilla
>
> I am creating a couple of components using the following code:
> import java.io.FileOutputStream;
> import java.util.List;
> import javax.xml.namespace.QName;
> import javax.xml.stream.XMLInputFactory;
> import javax.xml.stream.XMLOutputFactory;
> import javax.xml.stream.XMLStreamWriter;
> import org.apache.tuscany.sca.assembly.AssemblyFactory;
> import org.apache.tuscany.sca.assembly.Component;
> import org.apache.tuscany.sca.assembly.Composite;
> import org.apache.tuscany.sca.assembly.xml.Constants;
> import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
> import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
> import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessorExtensionPoint;
> import org.apache.tuscany.sca.core.DefaultExtensionPointRegistry;
> import org.apache.tuscany.sca.core.ExtensionPointRegistry;
> import org.apache.tuscany.sca.implementation.widget.WidgetImplementation;
> import org.apache.tuscany.sca.implementation.widget.WidgetImplementationFactory;
> public class TuscanyCompositeSerializationTest {
> public static void main(String[] args) throws Exception {
> ExtensionPointRegistry registry = new DefaultExtensionPointRegistry();
> ModelFactoryExtensionPoint factories = registry
> .getExtensionPoint(ModelFactoryExtensionPoint.class);
> AssemblyFactory assemblyFactory = factories.getFactory(AssemblyFactory.class);
> XMLInputFactory xmlInputFactory = XMLInputFactory.newInstance();
> XMLOutputFactory xmlOutputFactory = XMLOutputFactory.newInstance();
> factories.addFactory(xmlOutputFactory);
> factories.addFactory(xmlInputFactory);
> QName qName = new QName("http://www.example.org", "test");
> Composite composite = assemblyFactory.createComposite();
> composite.setName(qName);
> List<Component> components = composite.getComponents();
> Component component = createWidgetComponent(factories, assemblyFactory,"A");
> components.add(component);
> component = createWidgetComponent(factories, assemblyFactory, "B");
> components.add(component);
> StAXArtifactProcessorExtensionPoint extensionPoint = registry
> .getExtensionPoint(StAXArtifactProcessorExtensionPoint.class);
> StAXArtifactProcessor<Composite> processor = extensionPoint
> .getProcessor(new QName(Constants.SCA10_NS, Constants.COMPOSITE));
> FileOutputStream fileOutputStream = new FileOutputStream(
> "test.composite");
> XMLStreamWriter streamWriter = xmlOutputFactory
> .createXMLStreamWriter(fileOutputStream);
> System.out.println(composite);
> processor.write(composite, streamWriter);
> fileOutputStream.close();
> }
>
> private static Component createWidgetComponent(
> ModelFactoryExtensionPoint factories,
> AssemblyFactory assemblyFactory, String name) {
> Component component = assemblyFactory.createComponent();
> component.setName(name);
> WidgetImplementationFactory widgetFactory = factories
> .getFactory(WidgetImplementationFactory.class);
> WidgetImplementation widgetImpl = widgetFactory
> .createWidgetImplementation();
> widgetImpl.setLocation(name + ".html");
> component.setImplementation(widgetImpl);
> return component;
> }
> }
> And the output of this run is:
> <?xml version="1.0" encoding="UTF-8"?>
> <composite targetNamespace="http://www.example.org" name="test" local="true" xmlns="http://www.osoa.org/xmlns/sca/1.0">
> <component name="A">
> <sp_0:implementation.widget
> location="A.html"
> xmlns:ns1="http://tuscany.apache.org/xmlns/sca/1.0"
> xmlns:sp_0="http://tuscany.apache.org/xmlns/sca/1.0">
> </sp_0:implementation.widget>
> </component>
> <component name="B">
> <sp_1:implementation.widget
> location="B.html"
> xmlns:ns1="http://tuscany.apache.org/xmlns/sca/1.0"
> xmlns:sp_1="http://tuscany.apache.org/xmlns/sca/1.0">
> </sp_1:implementation.widget>
> </component>
> </composite>
> Where http://tuscany.apache.org/xmlns/sca/1.0 is defined in every component I add to the composite.
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