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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package org.apache.openjpa.kernel;
import java.io.IOException;
import java.io.ObjectOutput;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.util.BitSet;
import org.apache.openjpa.enhance.PersistenceCapable;
import org.apache.openjpa.enhance.StateManager;
import org.apache.openjpa.enhance.Reflection;
import org.apache.openjpa.lib.util.J2DoPrivHelper;
import org.apache.openjpa.meta.AccessCode;
import org.apache.openjpa.meta.ClassMetaData;
import org.apache.openjpa.meta.FieldMetaData;
import org.apache.openjpa.meta.JavaTypes;
import org.apache.openjpa.meta.ValueMetaData;
import org.apache.openjpa.util.GeneralException;
import org.apache.openjpa.util.ImplHelper;
/**
* State manager used to access state of embedded object id primary key fields.
*
* @author Abe White
* @nojavadoc
*/
public class ObjectIdStateManager
implements OpenJPAStateManager {
private static final Byte ZERO_BYTE = new Byte((byte) 0);
private static final Character ZERO_CHAR = new Character((char) 0);
private static final Double ZERO_DOUBLE = new Double(0);
private static final Float ZERO_FLOAT = new Float(0);
private static final Short ZERO_SHORT = new Short((short) 0);
private Object _oid;
private final OpenJPAStateManager _owner;
private final ValueMetaData _vmd;
/**
* Constructor; supply embedded object id and its owner.
*
* @param owner may be null
*/
public ObjectIdStateManager(Object oid, OpenJPAStateManager owner,
ValueMetaData ownerVal) {
_oid = oid;
_owner = owner;
_vmd = ownerVal;
}
public Object getGenericContext() {
return (_owner == null) ? null : _owner.getGenericContext();
}
public Object getPCPrimaryKey(Object oid, int field) {
throw new UnsupportedOperationException();
}
public StateManager replaceStateManager(StateManager sm) {
throw new UnsupportedOperationException();
}
public Object getVersion() {
return null;
}
public void setVersion(Object version) {
throw new UnsupportedOperationException();
}
public boolean isDirty() {
return false;
}
public boolean isTransactional() {
return false;
}
public boolean isPersistent() {
return false;
}
public boolean isNew() {
return false;
}
public boolean isDeleted() {
return false;
}
public boolean isDetached() {
return true;
}
public boolean isVersionUpdateRequired() {
return false;
}
public boolean isVersionCheckRequired() {
return false;
}
public void dirty(String field) {
throw new UnsupportedOperationException();
}
public Object fetchObjectId() {
return null;
}
public void accessingField(int idx) {
throw new UnsupportedOperationException();
}
public boolean serializing() {
throw new UnsupportedOperationException();
}
public boolean writeDetached(ObjectOutput out)
throws IOException {
throw new UnsupportedOperationException();
}
public void proxyDetachedDeserialized(int idx) {
throw new UnsupportedOperationException();
}
public void settingBooleanField(PersistenceCapable pc, int idx,
boolean cur, boolean next, int set) {
throw new UnsupportedOperationException();
}
public void settingCharField(PersistenceCapable pc, int idx, char cur,
char next, int set) {
throw new UnsupportedOperationException();
}
public void settingByteField(PersistenceCapable pc, int idx, byte cur,
byte next, int set) {
throw new UnsupportedOperationException();
}
public void settingShortField(PersistenceCapable pc, int idx, short cur,
short next, int set) {
throw new UnsupportedOperationException();
}
public void settingIntField(PersistenceCapable pc, int idx, int cur,
int next, int set) {
throw new UnsupportedOperationException();
}
public void settingLongField(PersistenceCapable pc, int idx, long cur,
long next, int set) {
throw new UnsupportedOperationException();
}
public void settingFloatField(PersistenceCapable pc, int idx, float cur,
float next, int set) {
throw new UnsupportedOperationException();
}
public void settingDoubleField(PersistenceCapable pc, int idx, double cur,
double next, int set) {
throw new UnsupportedOperationException();
}
public void settingStringField(PersistenceCapable pc, int idx, String cur,
String next, int set) {
throw new UnsupportedOperationException();
}
public void settingObjectField(PersistenceCapable pc, int idx, Object cur,
Object next, int set) {
throw new UnsupportedOperationException();
}
public void providedBooleanField(PersistenceCapable pc, int idx,
boolean cur) {
throw new UnsupportedOperationException();
}
public void providedCharField(PersistenceCapable pc, int idx, char cur) {
throw new UnsupportedOperationException();
}
public void providedByteField(PersistenceCapable pc, int idx, byte cur) {
throw new UnsupportedOperationException();
}
public void providedShortField(PersistenceCapable pc, int idx, short cur) {
throw new UnsupportedOperationException();
}
public void providedIntField(PersistenceCapable pc, int idx, int cur) {
throw new UnsupportedOperationException();
}
public void providedLongField(PersistenceCapable pc, int idx, long cur) {
throw new UnsupportedOperationException();
}
public void providedFloatField(PersistenceCapable pc, int idx, float cur) {
throw new UnsupportedOperationException();
}
public void providedDoubleField(PersistenceCapable pc, int idx,
double cur) {
throw new UnsupportedOperationException();
}
public void providedStringField(PersistenceCapable pc, int idx,
String cur) {
throw new UnsupportedOperationException();
}
public void providedObjectField(PersistenceCapable pc, int idx,
Object cur) {
throw new UnsupportedOperationException();
}
public boolean replaceBooleanField(PersistenceCapable pc, int idx) {
throw new UnsupportedOperationException();
}
public char replaceCharField(PersistenceCapable pc, int idx) {
throw new UnsupportedOperationException();
}
public byte replaceByteField(PersistenceCapable pc, int idx) {
throw new UnsupportedOperationException();
}
public short replaceShortField(PersistenceCapable pc, int idx) {
throw new UnsupportedOperationException();
}
public int replaceIntField(PersistenceCapable pc, int idx) {
throw new UnsupportedOperationException();
}
public long replaceLongField(PersistenceCapable pc, int idx) {
throw new UnsupportedOperationException();
}
public float replaceFloatField(PersistenceCapable pc, int idx) {
throw new UnsupportedOperationException();
}
public double replaceDoubleField(PersistenceCapable pc, int idx) {
throw new UnsupportedOperationException();
}
public String replaceStringField(PersistenceCapable pc, int idx) {
throw new UnsupportedOperationException();
}
public Object replaceObjectField(PersistenceCapable pc, int idx) {
throw new UnsupportedOperationException();
}
///////////////////////////////////
// OpenJPAStateManager implementation
///////////////////////////////////
public void initialize(Class forType, PCState state) {
throw new UnsupportedOperationException();
}
public void load(FetchConfiguration fetch) {
throw new UnsupportedOperationException();
}
public Object getManagedInstance() {
return _oid;
}
public PersistenceCapable getPersistenceCapable() {
return ImplHelper.toPersistenceCapable(_oid,
_vmd.getRepository().getConfiguration());
}
public ClassMetaData getMetaData() {
return _vmd.getEmbeddedMetaData();
}
public OpenJPAStateManager getOwner() {
return _owner;
}
public int getOwnerIndex() {
return _vmd.getFieldMetaData().getIndex();
}
public boolean isEmbedded() {
return true;
}
public boolean isFlushed() {
return false;
}
public boolean isFlushedDirty() {
return false;
}
public boolean isProvisional() {
return false;
}
public BitSet getLoaded() {
throw new UnsupportedOperationException();
}
public BitSet getDirty() {
throw new UnsupportedOperationException();
}
public BitSet getFlushed() {
throw new UnsupportedOperationException();
}
public BitSet getUnloaded(FetchConfiguration fetch) {
throw new UnsupportedOperationException();
}
public Object newProxy(int field) {
throw new UnsupportedOperationException();
}
public Object newFieldProxy(int field) {
throw new UnsupportedOperationException();
}
public boolean isDefaultValue(int field) {
Object val = getValue(field);
if (val == null)
return true;
FieldMetaData fmd = getMetaData().getField(field);
switch (fmd.getDeclaredTypeCode()) {
case JavaTypes.BOOLEAN:
return Boolean.FALSE.equals(val);
case JavaTypes.CHAR:
return ((Character) val).charValue() == 0;
case JavaTypes.BYTE:
case JavaTypes.DOUBLE:
case JavaTypes.FLOAT:
case JavaTypes.INT:
case JavaTypes.LONG:
case JavaTypes.SHORT:
return ((Number) val).intValue() == 0;
case JavaTypes.STRING:
return "".equals(val);
default:
return false;
}
}
public StoreContext getContext() {
return (_owner == null) ? null : _owner.getContext();
}
public PCState getPCState() {
throw new UnsupportedOperationException();
}
public Object getObjectId() {
return null;
}
public void setObjectId(Object oid) {
throw new UnsupportedOperationException();
}
public boolean assignObjectId(boolean flush) {
throw new UnsupportedOperationException();
}
public Object getId() {
return null;
}
public Object getLock() {
return null;
}
public void setLock(Object lock) {
throw new UnsupportedOperationException();
}
public void setNextVersion(Object version) {
throw new UnsupportedOperationException();
}
public Object getImplData() {
return null;
}
public Object setImplData(Object data, boolean cacheable) {
throw new UnsupportedOperationException();
}
public boolean isImplDataCacheable() {
return false;
}
public Object getImplData(int field) {
return null;
}
public Object setImplData(int field, Object data) {
throw new UnsupportedOperationException();
}
public boolean isImplDataCacheable(int field) {
return false;
}
public Object getIntermediate(int field) {
return null;
}
public void setIntermediate(int field, Object data) {
throw new UnsupportedOperationException();
}
public void removed(int field, Object removed, boolean key) {
throw new UnsupportedOperationException();
}
public boolean beforeRefresh(boolean all) {
throw new UnsupportedOperationException();
}
public void dirty(int field) {
throw new UnsupportedOperationException();
}
public void storeBoolean(int field, boolean extVal) {
setValue(field, (extVal) ? Boolean.TRUE : Boolean.FALSE, true);
}
public void storeByte(int field, byte extVal) {
setValue(field, new Byte(extVal), true);
}
public void storeChar(int field, char extVal) {
setValue(field, new Character(extVal), true);
}
public void storeInt(int field, int extVal) {
setValue(field, extVal, true);
}
public void storeShort(int field, short extVal) {
setValue(field, new Short(extVal), true);
}
public void storeLong(int field, long extVal) {
setValue(field, extVal, true);
}
public void storeFloat(int field, float extVal) {
setValue(field, new Float(extVal), true);
}
public void storeDouble(int field, double extVal) {
setValue(field, new Double(extVal), true);
}
public void storeString(int field, String extVal) {
setValue(field, extVal, extVal != null);
}
public void storeObject(int field, Object extVal) {
setValue(field, extVal, extVal != null);
}
public void store(int field, Object extVal) {
boolean forceInst = true;
if (extVal == null) {
extVal = getDefaultValue(field);
forceInst = false;
}
setValue(field, extVal, forceInst);
}
public void storeBooleanField(int field, boolean extVal) {
storeBoolean(field, extVal);
}
public void storeByteField(int field, byte extVal) {
storeByte(field, extVal);
}
public void storeCharField(int field, char extVal) {
storeChar(field, extVal);
}
public void storeIntField(int field, int extVal) {
storeInt(field, extVal);
}
public void storeShortField(int field, short extVal) {
storeShort(field, extVal);
}
public void storeLongField(int field, long extVal) {
storeLong(field, extVal);
}
public void storeFloatField(int field, float extVal) {
storeFloat(field, extVal);
}
public void storeDoubleField(int field, double extVal) {
storeDouble(field, extVal);
}
public void storeStringField(int field, String extVal) {
storeString(field, extVal);
}
public void storeObjectField(int field, Object extVal) {
storeObject(field, extVal);
}
public void storeField(int field, Object value) {
store(field, value);
}
public boolean fetchBoolean(int field) {
return ((Boolean) getValue(field)).booleanValue();
}
public byte fetchByte(int field) {
return ((Number) getValue(field)).byteValue();
}
public char fetchChar(int field) {
return ((Character) getValue(field)).charValue();
}
public short fetchShort(int field) {
return ((Number) getValue(field)).shortValue();
}
public int fetchInt(int field) {
return ((Number) getValue(field)).intValue();
}
public long fetchLong(int field) {
return ((Number) getValue(field)).longValue();
}
public float fetchFloat(int field) {
return ((Number) getValue(field)).floatValue();
}
public double fetchDouble(int field) {
return ((Number) getValue(field)).doubleValue();
}
public String fetchString(int field) {
return (String) getValue(field);
}
public Object fetchObject(int field) {
return getValue(field);
}
public Object fetch(int field) {
Object ret = getValue(field);
if (ret == null)
ret = getDefaultValue(field);
return ret;
}
public boolean fetchBooleanField(int field) {
return fetchBoolean(field);
}
public byte fetchByteField(int field) {
return fetchByte(field);
}
public char fetchCharField(int field) {
return fetchChar(field);
}
public short fetchShortField(int field) {
return fetchShort(field);
}
public int fetchIntField(int field) {
return fetchInt(field);
}
public long fetchLongField(int field) {
return fetchLong(field);
}
public float fetchFloatField(int field) {
return fetchFloat(field);
}
public double fetchDoubleField(int field) {
return fetchDouble(field);
}
public String fetchStringField(int field) {
return fetchString(field);
}
public Object fetchObjectField(int field) {
return fetch(field);
}
public Object fetchField(int field, boolean transitions) {
return fetch(field);
}
public Object fetchInitialField(int field) {
throw new UnsupportedOperationException();
}
public void setRemote(int field, Object value) {
store(field, value);
}
public void lock() {
}
public void unlock() {
}
/**
* Return the default value of the given field based on its type.
*/
private Object getDefaultValue(int field) {
FieldMetaData fmd = getMetaData().getField(field);
switch (fmd.getDeclaredTypeCode()) {
case JavaTypes.BOOLEAN:
return Boolean.FALSE;
case JavaTypes.BYTE:
return ZERO_BYTE;
case JavaTypes.CHAR:
return ZERO_CHAR;
case JavaTypes.DOUBLE:
return ZERO_DOUBLE;
case JavaTypes.FLOAT:
return ZERO_FLOAT;
case JavaTypes.INT:
return 0;
case JavaTypes.LONG:
return 0L;
case JavaTypes.SHORT:
return ZERO_SHORT;
default:
return null;
}
}
/**
* Return the value of the given field using reflection.
* Relies on the fact that all oid fields/properties are made public
* during enhancement.
*/
private Object getValue(int field) {
if (_oid == null)
return null;
FieldMetaData fmd = getMetaData().getField(field);
Object val = null;
if (fmd.getBackingMember() instanceof Field)
val = Reflection.get(_oid, (Field) fmd.getBackingMember());
else if (fmd.getBackingMember() instanceof Method)
val = Reflection.get(_oid, (Method) fmd.getBackingMember());
else if (AccessCode.isField(fmd.getDefiningMetaData().getAccessType()))
val = Reflection.get(_oid, Reflection.findField(_oid.getClass(),
fmd.getName(), true));
else
val = Reflection.get(_oid, Reflection.findGetter(_oid.getClass(),
fmd.getName(), true));
if (fmd.getValue().getEmbeddedMetaData() != null)
return new ObjectIdStateManager(val, null, fmd);
return val;
}
/**
* Set the value of the given field using reflection.
* Relies on the fact that all oid fields/properties are made public
* during enhancement.
*/
private void setValue(int field, Object val, boolean forceInst) {
if (_oid == null && forceInst) {
try {
_oid = AccessController.doPrivileged(
J2DoPrivHelper.newInstanceAction(
getMetaData().getDescribedType()));
} catch (Exception e) {
if (e instanceof PrivilegedActionException)
e = ((PrivilegedActionException) e).getException();
throw new GeneralException(e);
}
} else if (_oid == null)
return;
FieldMetaData fmd = getMetaData().getField(field);
if (fmd.getBackingMember() instanceof Field)
Reflection.set(_oid, (Field) fmd.getBackingMember(), val);
else if (AccessCode.isField(fmd.getDefiningMetaData().getAccessType()))
Reflection.set(_oid, Reflection.findField(_oid.getClass(),
fmd.getName(), true), val);
else
Reflection.set(_oid, Reflection.findSetter(_oid.getClass(),
fmd.getName(), fmd.getDeclaredType(), true), val);
}
}
