org.granite.eclipselink.EclipseLinkExternalizer Maven / Gradle / Ivy
/*
GRANITE DATA SERVICES
Copyright (C) 2011 GRANITE DATA SERVICES S.A.S.
This file is part of Granite Data Services.
Granite Data Services is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
Granite Data Services is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
for more details.
You should have received a copy of the GNU Library General Public License
along with this library; if not, see fields = findOrderedFields(oClass);
log.debug("Reading entity %s with fields %s", oClass.getName(), fields);
Map topLinkFields = new HashMap();
for (Property field : fields) {
if (field.getType() instanceof Class && ValueHolderInterface.class.isAssignableFrom((Class)field.getType())) {
topLinkFields.put(field.getName(), field);
}
else {
Object value = in.readObject();
if (value instanceof ValueHolderInterface) {
topLinkFields.get("_persistence_" + field.getName() + "_vh").setProperty(o, value, false);
}
else if (!(field instanceof MethodProperty && field.isAnnotationPresent(ExternalizedProperty.class))) {
if (value instanceof AbstractExternalizablePersistentCollection)
value = newIndirectCollection((AbstractExternalizablePersistentCollection)value, field.getType());
else
value = converters.convert(value, field.getType());
field.setProperty(o, value, false);
}
}
}
}
}
@Override
protected boolean isPropertyIgnored(Field field) {
return field.getName().equals("_persistence_fetchGroup");
}
protected IndirectContainer newIndirectCollection(AbstractExternalizablePersistentCollection value, Type target) {
final boolean initialized = value.isInitialized();
final Object[] content = value.getContent();
IndirectContainer coll = null;
if (value instanceof ExternalizablePersistentSet) {
if (initialized) {
if (content != null) {
Set set = ((ExternalizablePersistentSet)value).getContentAsSet(target);
coll = new IndirectSet(set);
}
}
else
coll = new IndirectSet();
}
else if (value instanceof ExternalizablePersistentList) {
if (initialized) {
if (content != null) {
List list = ((ExternalizablePersistentList)value).getContentAsList(target);
coll = new IndirectList(list);
}
}
else
coll = new IndirectList();
}
else if (value instanceof ExternalizablePersistentMap) {
if (initialized) {
if (content != null) {
Map map = ((ExternalizablePersistentMap)value).getContentAsMap(target);
coll = new IndirectMap(map);
}
}
else
coll = new IndirectMap();
}
else {
throw new RuntimeException("Illegal externalizable persitent class: " + value);
}
return coll;
}
@Override
public void writeExternal(Object o, ObjectOutput out) throws IOException, IllegalAccessException {
ClassGetter classGetter = GraniteContext.getCurrentInstance().getGraniteConfig().getClassGetter();
Class oClass = classGetter.getClass(o);
if (o instanceof EclipseLinkProxy) {
EclipseLinkProxy proxy = (EclipseLinkProxy)o;
// Only write initialized flag, null detachedState & null id if proxy is uninitialized.
String description = proxy.getProxiedClass().getName();
log.debug("Writing uninitialized EclipseLink ValueHolder %s", description);
// Write initialized flag.
out.writeObject(Boolean.FALSE);
// Write detachedState.
out.writeObject(null);
// Write id.
out.writeObject(null);
return;
}
if (!isRegularEntity(o.getClass()) && !isEmbeddable(o.getClass())) { // @Embeddable or others...
log.debug("Delegating non regular entity writing to DefaultExternalizer...");
super.writeExternal(o, out);
}
else {
if (isRegularEntity(o.getClass())) {
// Write initialized flag.
out.writeObject(Boolean.TRUE);
// Write detachedState.
out.writeObject(null);
}
// Externalize entity fields.
List fields = findOrderedFields(oClass);
List lazyFieldNames = new ArrayList();
log.debug("Writing entity %s with fields %s", o.getClass().getName(), fields);
for (Property field : fields) {
if (!(field.getType() instanceof Class && ValueHolderInterface.class.isAssignableFrom((Class)field.getType()))) {
if (lazyFieldNames.contains(field.getName())) {
EclipseLinkProxy proxy = new EclipseLinkProxy((Class)field.getType());
out.writeObject(proxy);
}
else {
Object value = field.getProperty(o);
// Persistent collections & maps.
if (value instanceof IndirectContainer)
value = newExternalizableCollection((IndirectContainer)value);
// Transient maps.
else if (value instanceof Map)
value = BasicMap.newInstance((Map)value);
out.writeObject(value);
}
}
else {
ValueHolderInterface vh = (ValueHolderInterface)field.getProperty(o);
if (!vh.isInstantiated())
lazyFieldNames.add(field.getName().substring("_persistence_".length(), field.getName().length()-3));
}
}
}
}
protected AbstractExternalizablePersistentCollection newExternalizableCollection(IndirectContainer value) {
AbstractExternalizablePersistentCollection coll = null;
boolean initialized = value.isInstantiated();
if (value instanceof IndirectSet) {
coll = new ExternalizablePersistentSet(initialized ? ((IndirectSet)value).toArray() : null, initialized, false);
}
else if (value instanceof IndirectList) {
coll = new ExternalizablePersistentList(initialized ? ((IndirectList)value).toArray() : null, initialized, false);
}
else if (value instanceof IndirectMap) {
Object[] content = null;
if (initialized) {
content = new Object[((IndirectMap)value).size()];
int index = 0;
@SuppressWarnings("unchecked")
Set> entries = ((IndirectMap)value).entrySet();
for (Map.Entry entry : entries)
content[index++] = new Object[]{entry.getKey(), entry.getValue()};
}
coll = new ExternalizablePersistentMap(content, initialized, false);
}
else {
throw new UnsupportedOperationException("Unsupported EclipseLink collection type: " + value);
}
return coll;
}
@Override
public int accept(Class clazz) {
return (
clazz.isAnnotationPresent(Entity.class) ||
clazz.isAnnotationPresent(MappedSuperclass.class) ||
clazz.isAnnotationPresent(Embeddable.class)
) ? 1 : -1;
}
protected boolean isRegularEntity(Class clazz) {
return clazz.isAnnotationPresent(Entity.class) || clazz.isAnnotationPresent(MappedSuperclass.class);
}
protected boolean isEmbeddable(Class clazz) {
return clazz.isAnnotationPresent(Embeddable.class);
}
}
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