/*
* Copyright 2005 Werner Guttmann
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* $Id: PrimitiveResolver.java 7121 2007-07-31 22:56:50Z rjoachim $
*/
package org.castor.persist.resolver;
import org.castor.persist.ProposedEntity;
import org.castor.persist.TransactionContext;
import org.castor.persist.UpdateAndRemovedFlags;
import org.castor.persist.UpdateFlags;
import org.exolab.castor.jdo.PersistenceException;
import org.exolab.castor.mapping.AccessMode;
import org.exolab.castor.persist.ClassMolder;
import org.exolab.castor.persist.ClassMolderHelper;
import org.exolab.castor.persist.FieldMolder;
import org.exolab.castor.persist.OID;
import org.exolab.castor.persist.spi.Identity;
/**
* Implementation of {@link org.castor.persist.resolver.ResolverStrategy} for primitive fields.
*
* @author <a href="mailto:werner DOT guttmann AT gmx DOT net">Werner Guttmann</a>
* @since 0.9.9
*/
public final class PrimitiveResolver implements ResolverStrategy {
private FieldMolder _fieldMolder;
private int _fieldIndex;
/**
* Creates an instance of PrimitiveResolver.
*
* @param classMolder Associated {@link ClassMolder}
* @param fieldMolder Associated {@link FieldMolder}
* @param fieldIndex Field index within all fields of parent class molder.
* @param debug ???
*/
public PrimitiveResolver(final ClassMolder classMolder,
final FieldMolder fieldMolder,
final int fieldIndex,
final boolean debug) {
this._fieldMolder = fieldMolder;
this._fieldIndex = fieldIndex;
}
/**
* @see org.castor.persist.resolver.ResolverStrategy#create(
* org.castor.persist.TransactionContext, java.lang.Object)
*/
public Object create(final TransactionContext tx, final Object object) {
return _fieldMolder.getValue(object, tx.getClassLoader());
}
/**
* @see org.castor.persist.resolver.ResolverStrategy#markCreate(
* org.castor.persist.TransactionContext, org.exolab.castor.persist.OID,
* java.lang.Object)
*/
public boolean markCreate(final TransactionContext tx, final OID oid,
final Object object) {
boolean updateCache = false;
return updateCache;
}
/**
* @see org.castor.persist.resolver.ResolverStrategy#preStore(
* org.castor.persist.TransactionContext, org.exolab.castor.persist.OID,
* java.lang.Object, int, java.lang.Object)
*/
public UpdateFlags preStore(final TransactionContext tx, final OID oid,
final Object object, final int timeout, final Object field) {
UpdateFlags flags = new UpdateFlags();
Object value = _fieldMolder.getValue(object, tx.getClassLoader());
if (!ClassMolderHelper.isEquals(field, value)) {
if (_fieldMolder.isReadonly()) {
_fieldMolder.setValue(object, field, tx.getClassLoader());
} else {
if (_fieldMolder.isStored() /* && _fhs[i].isCheckDirty() */) {
flags.setUpdatePersist(true);
}
flags.setUpdateCache(true);
}
}
return flags;
}
/**
* @see org.castor.persist.resolver.ResolverStrategy#store(
* org.castor.persist.TransactionContext, java.lang.Object, java.lang.Object)
*/
public Object store(final TransactionContext tx, final Object object,
final Object field) {
Object newField = null;
newField = _fieldMolder.getValue(object, tx.getClassLoader());
return newField;
}
/**
* @see org.castor.persist.resolver.ResolverStrategy#update(
* org.castor.persist.TransactionContext, org.exolab.castor.persist.OID,
* java.lang.Object, org.exolab.castor.mapping.AccessMode, java.lang.Object)
*/
public void update(final TransactionContext tx, final OID oid,
final Object object, final AccessMode suggestedAccessMode,
final Object field) {
// nothing to do
}
/**
* @see org.castor.persist.resolver.ResolverStrategy#updateCache(
* org.castor.persist.TransactionContext, org.exolab.castor.persist.OID,
* java.lang.Object)
*/
public Object updateCache(final TransactionContext tx, final OID oid,
final Object object) {
// should give some attemp to reduce new object array
Object field = _fieldMolder.getValue(object, tx.getClassLoader());
return field;
}
/**
* @see org.castor.persist.resolver.ResolverStrategy#markDelete(
* org.castor.persist.TransactionContext, java.lang.Object, java.lang.Object)
*/
public void markDelete(final TransactionContext tx, final Object object,
final Object field) {
// nothing to do
}
/**
* @see org.castor.persist.resolver.ResolverStrategy#revertObject(
* org.castor.persist.TransactionContext, org.exolab.castor.persist.OID,
* java.lang.Object, java.lang.Object)
*/
public void revertObject(final TransactionContext tx, final OID oid,
final Object object, final Object field) {
_fieldMolder.setValue(object, field, tx.getClassLoader());
}
/**
* @see org.castor.persist.resolver.ResolverStrategy#expireCache(
* org.castor.persist.TransactionContext, java.lang.Object)
*/
public void expireCache(final TransactionContext tx, final Object field) {
// nothing to do
}
/**
* @see org.castor.persist.resolver.ResolverStrategy#load(
* org.castor.persist.TransactionContext, org.exolab.castor.persist.OID,
* org.castor.persist.ProposedEntity, org.exolab.castor.mapping.AccessMode)
*/
public void load(final TransactionContext tx, final OID oid,
final ProposedEntity proposedObject,
final AccessMode suggestedAccessMode) {
// simply set the corresponding Persistent field value into the object
Object fieldValue = proposedObject.getField(_fieldIndex);
if (fieldValue != null) {
_fieldMolder.setValue(proposedObject.getEntity(), fieldValue, tx
.getClassLoader());
} else {
_fieldMolder.setValue(proposedObject.getEntity(), null, tx
.getClassLoader());
}
}
/**
* @see org.castor.persist.resolver.ResolverStrategy#postCreate(
* org.castor.persist.TransactionContext, org.exolab.castor.persist.OID,
* java.lang.Object, java.lang.Object, org.exolab.castor.persist.spi.Identity)
*/
public Object postCreate(final TransactionContext tx, final OID oid,
final Object object, final Object field, final Identity createdId) {
return field;
}
/**
* @see org.castor.persist.resolver.ResolverStrategy#removeRelation(
* org.castor.persist.TransactionContext, java.lang.Object,
* org.exolab.castor.persist.ClassMolder, java.lang.Object)
*/
public UpdateAndRemovedFlags removeRelation(final TransactionContext tx,
final Object object, final ClassMolder relatedMolder,
final Object relatedObject) {
return new UpdateAndRemovedFlags();
}
/**
* @inheritDoc
*/
public boolean updateWhenNoTimestampSet(
final TransactionContext tx,
final OID oid,
final Object object,
final AccessMode suggestedAccessMode)
throws PersistenceException {
// nothing need to be done here for primitive
return false;
}
}