@Override
boolean evolve(Format newFormatParam, Evolver evolver) {
if (!(newFormatParam instanceof ProxiedFormat)) {
evolver.addEvolveError(
this, newFormatParam, null, "A proxied class may not be changed to a different type");
return false;
}
ProxiedFormat newFormat = (ProxiedFormat) newFormatParam;
if (!evolver.evolveFormat(proxyFormat)) {
return false;
}
Format newProxyFormat = proxyFormat.getLatestVersion();
if (!newProxyFormat.getClassName().equals(newFormat.getProxyClassName())) {
evolver.addEvolveError(
this,
newFormat,
null,
"The proxy class for this type has been changed from: "
+ newProxyFormat.getClassName()
+ " to: "
+ newFormat.getProxyClassName());
return false;
}
if (newProxyFormat != proxyFormat) {
evolver.useEvolvedFormat(this, this, newFormat);
} else {
evolver.useOldFormat(this, newFormat);
}
return true;
}
@Override
void initialize(Catalog catalog, EntityModel model, int initVersion) {
/* Set the component format for a new (never initialized) format. */
if (componentFormat == null) {
Class cls = getType().getComponentType();
componentFormat = catalog.getFormat(cls.getName());
}
useComponentFormat = componentFormat.getLatestVersion();
}
@Override
boolean evolve(Format newFormat, Evolver evolver) {
/*
* When the class name of the component changes, we need a new format
* that references it. Otherwise, don't propogate changes from
* components upward to their arrays.
*/
Format latest = componentFormat.getLatestVersion();
if (latest != componentFormat
&& !latest.getClassName().equals(componentFormat.getClassName())) {
evolver.useEvolvedFormat(this, newFormat, newFormat);
} else {
evolver.useOldFormat(this, newFormat);
}
return true;
}
/**
* Creates the instance, reads the entity key first to track visited entities correctly, then
* reads the data and returns the entity.
*
* <p>This is a special case of EntityInput.readObject for a top level entity. Special treatments
* are: - The formatId must be >= 0; since this is the top level instance, it cannot refer to a
* visited object nor be a null reference. - The entity is not checked for existence in the
* visited object set; entities cannot be referenced by another entity. - Reader.readPriKey must
* be called prior to calling Reader.readObject.
*/
static Object readEntity(
Catalog useCatalog, DatabaseEntry key, Object priKey, DatabaseEntry data, boolean rawAccess)
throws RefreshException {
RecordInput dataInput =
new RecordInput(
useCatalog, rawAccess, null, 0, data.getData(), data.getOffset(), data.getSize());
int initialOffset = dataInput.getBufferOffset();
int formatId = dataInput.readPackedInt();
Format format = useCatalog.getFormat(formatId, true /*expectStored*/);
dataInput.registerEntityFormat(format);
Reader reader = format.getReader();
Object entity = reader.newInstance(dataInput, rawAccess);
if (priKey == null) {
/* If priKey is null, need to deserialize the primary key. */
RecordInput keyInput =
new RecordInput(
useCatalog, rawAccess, null, 0, key.getData(), key.getOffset(), key.getSize());
reader.readPriKey(entity, keyInput, rawAccess);
} else {
/*
* If priKey is not null, directly assign it to the primary key
* field. [#19248]
*/
Accessor accessor = reader.getAccessor(entity instanceof RawObject ? true : rawAccess);
if (accessor == null) {
accessor =
format
.getLatestVersion()
.getReader()
.getAccessor(entity instanceof RawObject ? true : rawAccess);
}
accessor.setPriField(entity, priKey);
}
dataInput.registerEntity(entity, initialOffset);
entity = reader.readObject(entity, dataInput, rawAccess);
return entity;
}