Unable to detect an valid Entity's meta data when the entity's .class file size
is large.
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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
Fix For: 1.0.1, 1.1.0
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.
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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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