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https://issues.apache.org/jira/browse/OPENJPA-402?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Albert Lee closed OPENJPA-402.
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> Unable to detect an valid Entity's meta data when the entity's .class file
> size is large.
> -----------------------------------------------------------------------------------------
>
> Key: OPENJPA-402
> URL: https://issues.apache.org/jira/browse/OPENJPA-402
> Project: OpenJPA
> Issue Type: Bug
> Components: lib
> Affects Versions: 1.0.1, 1.1.0
> Reporter: Albert Lee
> Assignee: Albert Lee
> Fix For: 1.0.1, 1.1.0
>
> Attachments: OPENJPA-402.patch
>
>
> We ran into a scenario in which an application has all the correct
> configuration in the persistence.xml and orm.xml but the provider is still
> unabled to recognize an entity and establish its meta data. As a result, the
> following exception is thrown from openjpa.
> org.apache.openjpa.persistence.ArgumentException:No metadata was found
> for type "class
> suite.r70.base.jpaspec.relationships.manyXmany.entities.containertype.annotated.MMContainerTypeEntityA".
> The class does not appear in the list of persistent types:
> [suite.r70.base.jpaspec.relationships.manyXmany.entities.uni.annotation.MMUniEntA,
>
> suite.r70.base.jpaspec.relationships.manyXmany.entities.bi.xml.XMLMMBiEntB_CA,
>
> ..........
> suite.r70.base.jpaspec.relationships.manyXmany.entities.bi.xml.XMLMMBiEntB_CRM]
> at
> org.apache.openjpa.meta.MetaDataRepository.getMetaData(MetaDataRepository.java:299)
> at org.apache.openjpa.kernel.BrokerImpl.persist(BrokerImpl.java:2371)
> at org.apache.openjpa.kernel.BrokerImpl.persist(BrokerImpl.java:2224)
> at
> org.apache.openjpa.kernel.DelegatingBroker.persist(DelegatingBroker.java:1005)
> at
> org.apache.openjpa.persistence.EntityManagerImpl.persist(EntityManagerImpl.java:541)
>
> There are many entities defined in this application. A point of interest is
> there are 2 entities in the same package, in the same persistence archive but
> only one of these entity's meta data is found.
> ------------------------------------------
> The cause of the problem is in ZipFileMetaDataIterator.getContent() method.
>
> public byte[] getContent() throws IOException {
> long size = _entry.getSize();
> if (size == 0)
> return new byte[0];
> InputStream in = _file.getInputStream(_entry);
> byte[] content;
> if (size < 0) {
> ByteArrayOutputStream bout = new ByteArrayOutputStream();
> byte[] buf = new byte[1024];
> for (int r; (r = in.read(buf)) != -1; bout.write(buf, 0, r)) ;
> content = bout.toByteArray();
> } else {
> content = new byte[(int) size];
> in.read(content); <<<<<<< cause of the problem here.
> }
> in.close();
> return content;
> }
> What happened is if the entity class file is big enough, the in.read() only
> returns partial content of the .class file. Therefore during the
> ClassAnnotationMetaDataFilter.match() processing the annotation attribute
> count in the .class file is read to be zero and the entity is not detected as
> an Entity.
> The solution is to replace
> in.read(content); <<<<<<< cause of the problem here.
>
> by
>
> int offset = 0;
> int read;
> while (offset < size
> && (read = in.read(content, offset, (int) size - offset)) !=
> -1) {
> offset += read;
> }
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