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https://issues.apache.org/jira/browse/SLING-12104?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Stefan Seifert closed SLING-12104.
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> OSGi Mock - Service Registration Designate OCD default empty property is
> ignored, which leads to NPE
> ----------------------------------------------------------------------------------------------------
>
> Key: SLING-12104
> URL: https://issues.apache.org/jira/browse/SLING-12104
> Project: Sling
> Issue Type: Bug
> Components: Testing
> Affects Versions: Testing OSGi Mock 3.3.10
> Reporter: Robin Brouns
> Assignee: Stefan Seifert
> Priority: Major
> Fix For: Testing OSGi Mock 3.4.0
>
>
> Considering the following sample Class:
> {code:java}
> package com.sample.website.job;
> import org.apache.commons.lang3.StringUtils;
> import org.apache.jackrabbit.oak.commons.PathUtils;
> import org.osgi.service.component.annotations.Activate;
> import org.osgi.service.component.annotations.Component;
> import org.osgi.service.component.annotations.Modified;
> import org.osgi.service.metatype.annotations.AttributeDefinition;
> import org.osgi.service.metatype.annotations.Designate;
> import org.osgi.service.metatype.annotations.ObjectClassDefinition;
> @Component(service = Runnable.class)
> @Designate(ocd = SampleJob.Config.class)
> public class SampleJob implements Runnable {
> private String sampleStringProperty;
> @Activate
> @Modified
> public void update(final Config configuration) {
> this.sampleStringProperty = configuration.sampleStringProperty();
> }
> @Override
> public void run() {
> if (PathUtils.isAbsolute(this.sampleStringProperty)) {
> // do something
> }
> }
> @ObjectClassDefinition(
> name = "Sample Configuration",
> description = "Sample Configuration Description"
> )
> @interface Config {
> @AttributeDefinition(
> name = "Sample String Property",
> description = "Sample String Property"
> )
> String sampleStringProperty() default StringUtils.EMPTY;
> }
> } {code}
> When I try to test this class with the default OSGi configuration via AEM
> Mocks:
> {code:java}
> final Runnable underTest =
> aemContext.registerInjectActivateService(SampleJob.class); {code}
> building this class leads to the following SCR definition:
> {code:java}
> <?xml version="1.0" encoding="UTF-8"?>
> <scr:component xmlns:scr="http://www.osgi.org/xmlns/scr/v1.3.0";
> name="com.sample.website.job.SampleJob" activate="update" modified="update">
> <property name="updateImportPath" type="String" value=""/>
> <service>
> <provide interface="java.lang.Runnable"/>
> </service>
> <implementation class="com.sample.website.job.SampleJob"/>
> </scr:component>{code}
> the *default* value of *updateImportPath* (an empty String) is *not* injected
> in the Configuration, but null is being used, which could lead to NPE.
> AEM Mocks uses OSGi Mocks and the following method is used to retrieve the
> *default* properties and values
> [https://github.com/apache/sling-org-apache-sling-testing-osgi-mock/blob/c55d97ba266e0630200fcbb378b3f102d2dfba90/core/src/main/java/org/apache/sling/testing/mock/osgi/OsgiMetadataUtil.java#L292C24-L292C46]
>
> But as you can see the XPath Query doesn't match with the SCR definition: the
> property exists with a *name* and there is a {*}value{*}, but it is empty, so:
> {code:java}
> String query = getComponentXPathQuery(clazz) + "/property[@name!='' and
> @value!='']"; {code}
> doesn't return the property and its default value and the result is a
> Configuration returning *null*
> The simple fix would be to check if the *value* attribute exists via the
> XPath Query in the SCR definition, instead of checking for a non empty value.
> A more robust fix would probably be to parse the OCD MetaType (if it is a OCD
> config) and use the *default* attribute which is present over there, see:
> {code:java}
> <?xml version="1.0" encoding="UTF-8"?>
> <metatype:MetaData xmlns:metatype="http://www.osgi.org/xmlns/metatype/v1.2.0";
> localization="OSGI-INF/l10n/com.sample.website.job.SampleJob$Config">
> <OCD id="com.sample.website.job.SampleJob$Config" name="Sample
> Configuration" description="Sample Configuration Description">
> <AD id="updateImportPath" type="String" name="Sample String Property"
> description="Sample String Property" default=""/>
> </OCD>
> <Designate pid="com.sample.website.job.SampleJob">
> <Object ocdref="com.sample.website.job.SampleJob$Config"/>
> </Designate>
> </metatype:MetaData>
> {code}
> What do you think about this?
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