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/*
* ====================================================================
* Project: openMDX/Core, http://www.openmdx.org/
* Description: Abstract org::openmdx::state2 Plug-In
* Owner: OMEX AG, Switzerland, http://www.omex.ch
* ====================================================================
*
* This software is published under the BSD license as listed below.
*
* Copyright (c) 2009-2014, OMEX AG, Switzerland
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of the openMDX team nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* ------------------
*
* This product includes software developed by other organizations as
* listed in the NOTICE file.
*/
package org.openmdx.state2.aop0;
import java.util.HashSet;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.SortedMap;
import javax.jdo.JDOUserCallbackException;
import javax.jdo.listener.DeleteLifecycleListener;
import javax.jdo.listener.InstanceLifecycleEvent;
import javax.jdo.listener.StoreLifecycleListener;
import org.openmdx.base.accessor.cci.DataObject_1_0;
import org.openmdx.base.accessor.cci.SystemAttributes;
import org.openmdx.base.accessor.rest.DataObject_1;
import org.openmdx.base.accessor.rest.UnitOfWork_1;
import org.openmdx.base.accessor.spi.ExceptionHelper;
import org.openmdx.base.aop0.PlugIn_1_0;
import org.openmdx.base.exception.ServiceException;
import org.openmdx.base.mof.cci.ModelElement_1_0;
import org.openmdx.base.mof.cci.ModelHelper;
import org.openmdx.base.mof.cci.Model_1_0;
import org.openmdx.base.mof.cci.Multiplicity;
import org.openmdx.base.naming.ClassicSegments;
import org.openmdx.kernel.exception.BasicException;
import org.openmdx.kernel.jdo.ReducedJDOHelper;
import org.openmdx.state2.spi.Propagation;
import org.openmdx.state2.spi.TechnicalAttributes;
/**
* Abstract org::openmdx::state2 Plug-In
*/
public abstract class AbstractPlugIn_1 implements PlugIn_1_0, StoreLifecycleListener, DeleteLifecycleListener {
/**
* Defines whether StateCapable objects may be deleted
*/
private boolean stateCapableDeletable = false;
/**
* Retrieve stateCapableDeletable.
*
* @return Returns the stateCapableDeletable.
*/
public boolean isStateCapableDeletable() {
return this.stateCapableDeletable;
}
/**
* Set stateCapableDeletable.
*
* @param stateCapableDeletable The stateCapableDeletable to set.
*/
public void setStateCapableDeletable(
boolean stateCapableDeletable
) {
this.stateCapableDeletable = stateCapableDeletable;
}
/* (non-Javadoc)
* @see org.openmdx.base.aop0.PlugIn_1_0#flush(org.openmdx.base.accessor.rest.UnitOfWork_1)
*/
@Override
public void flush(
UnitOfWork_1 dataObjectManager,
boolean beforeCompletion
) {
// nothing to do
}
/* (non-Javadoc)
* @see org.openmdx.base.aop0.PlugIn_1_0#setCore(org.openmdx.base.accessor.rest.DataObject_1, org.openmdx.base.accessor.rest.DataObject_1)
*/
@Override
public void postSetCore(
DataObject_1 target,
DataObject_1 core
) throws ServiceException {
Model_1_0 model = target.getModel();
if(model.isInstanceof(target, "org:openmdx:state2:BasicState")) {
if(target == core) {
throw new ServiceException(
BasicException.Code.DEFAULT_DOMAIN,
BasicException.Code.NOT_SUPPORTED,
"setCore() must no longer be used to set the validTimeUnique flag",
ExceptionHelper.newObjectIdParameter("target", target),
ExceptionHelper.newObjectIdParameter(SystemAttributes.CORE, core)
);
} else if(model.isInstanceof(core, "org:openmdx:state2:StateCapable")) {
core.getAspect("org:openmdx:state2:BasicState").values().add(target);
} else {
throw new ServiceException(
BasicException.Code.DEFAULT_DOMAIN,
BasicException.Code.BAD_PARAMETER,
"A BasicState's core object must be StateCapable",
ExceptionHelper.newObjectIdParameter("target", target),
ExceptionHelper.newObjectIdParameter(SystemAttributes.CORE, core),
new BasicException.Parameter("expected","org:openmdx:state2:StateCapable"),
new BasicException.Parameter("actual",core == null ? null : core.objGetClass())
);
}
}
}
/**
* Build a qualifier for a basic state instance
*
* @param coreComponent the qualifier's core component
* @param stateComponent the qualifier's state component
*
* @return a newly created qualifier
*/
protected abstract String newBasicStateQualifier(
String coreComponent,
Integer stateQualifier
);
/**
* Tests whether an object is of a given type
*
* @param object
* @param type the model class
*
* @return true if the object is of the given type
* @throws ServiceException
*/
protected static boolean isInstanceOf(
DataObject_1 object,
String type
) throws ServiceException {
return object.jdoGetPersistenceManager().getModel().isInstanceof(object, type);
}
/**
* null-safe sucessor implementation
*
* @param value
*
* @return the next integer value, or 1 if value is null
*/
private static Integer successor(
Integer value
){
return Integer.valueOf(value == null ? 0 : value.intValue() + 1);
}
/**
* The getQualifier() dispatching method for BasicState instances
*
* @param object
* @param qualifier
*
* @return the qualifier for a BasicState instance
*
* @throws ServiceException
*/
protected String getBasicStateQualifier(
final DataObject_1 object,
final String qualifier
) throws ServiceException {
final DataObject_1_0 core = (DataObject_1_0) object.objGetValue(SystemAttributes.CORE);
if(qualifier == null) {
throw new ServiceException(
BasicException.Code.DEFAULT_DOMAIN,
BasicException.Code.BAD_PARAMETER,
"A state is added to the container through its core reference only",
ExceptionHelper.newObjectIdParameter("id", this),
new BasicException.Parameter("qualifier", qualifier),
ExceptionHelper.newObjectIdParameter(SystemAttributes.CORE, core)
);
} else if(core == null) {
// We are processing a proxy's request
return qualifier;
} else if(ClassicSegments.isPlaceholder(qualifier)){
final Optional coreComponent = ClassicSegments.getCoreComponentFromAspectQualifierPlaceholder(qualifier);
if(coreComponent.isPresent()) {
return newBasicStateQualifier(
coreComponent.get(),
nextAspectComponent(core)
);
} else {
throw new ServiceException(
BasicException.Code.DEFAULT_DOMAIN,
BasicException.Code.BAD_PARAMETER,
"The qualifier does not match the aspect qualifier placeholder pattern",
ExceptionHelper.newObjectIdParameter("id", this),
new BasicException.Parameter("qualifier", qualifier),
new BasicException.Parameter("pattern", "^:([^:]+)+:[^:]+$")
);
}
} else if (core.jdoIsPersistent()) {
throw new ServiceException(
BasicException.Code.DEFAULT_DOMAIN,
BasicException.Code.NOT_SUPPORTED,
"Explicitely provided state components are not supported",
ExceptionHelper.newObjectIdParameter("id", this),
new BasicException.Parameter("qualifier", qualifier),
ExceptionHelper.newObjectIdParameter(SystemAttributes.CORE, core)
);
} else {
return qualifier;
}
}
/**
* Increments the state version and returns the new value
*
* @param core the state's core object
*
* @return the next aspect component
*
* @throws ServiceException
*/
private Integer nextAspectComponent(final DataObject_1_0 core)
throws ServiceException {
final Integer apectComponent = successor((Integer) core.objGetValue(TechnicalAttributes.STATE_VERSION));
core.objSetValue(
TechnicalAttributes.STATE_VERSION,
apectComponent
);
return apectComponent;
}
/* (non-Javadoc)
* @see org.openmdx.base.aop0.PlugIn_1_0#getQualifier(org.openmdx.base.accessor.rest.DataObject_1, java.lang.String)
*/
@Override
public String getQualifier(
DataObject_1 object,
String qualifier
) throws ServiceException {
return isInstanceOf(object, "org:openmdx:state2:BasicState") ? getBasicStateQualifier(object, qualifier) : qualifier;
}
/* (non-Javadoc)
* @see org.openmdx.base.aop0.PlugIn_1_0#getPlugInObject(java.lang.Class)
*/
public T getPlugInObject(Class type) {
return null;
}
/* (non-Javadoc)
* @see org.openmdx.base.aop0.PlugIn_1_0#callbackOnCascadedDeletes()
*/
@Override
public boolean requiresCallbackOnCascadedDelete(DataObject_1 object) {
return false;
}
/**
* Tells whether we are processing a state without its core object
*
* @param object
*
* @return true if we are processing a state without its core object
*
* @throws ServiceException
*/
protected boolean isStateOnly(DataObject_1 object) throws ServiceException {
return isInstanceOf(object, "org:openmdx:state2:StateCapable");
}
/* (non-Javadoc)
* @see org.openmdx.base.aop0.PlugIn_1_0#isExemptFromValidation(org.openmdx.base.mof.cci.ModelElement_1_0)
*/
public boolean isExemptFromValidation(
DataObject_1 object,
ModelElement_1_0 feature
) throws ServiceException {
Object qualifiedFeatureName = feature.getQualifiedName();
return
("org:openmdx:state2:StateCapable:stateVersion".equals(qualifiedFeatureName)) ||
("org:openmdx:base:Modifiable:modifiedAt".equals(qualifiedFeatureName) && isStateOnly(object));
}
/* (non-Javadoc)
* @see org.openmdx.base.aop0.PlugIn_1_0#isAspect(org.openmdx.base.accessor.rest.DataObject_1)
*/
@Override
public Boolean isAspect(
DataObject_1 object
) throws ServiceException {
return null;
}
//------------------------------------------------------------------------
// Implements StoreLifecycleListener
//------------------------------------------------------------------------
/* (non-Javadoc)
* @see javax.jdo.listener.StoreLifecycleListener#postStore(javax.jdo.listener.InstanceLifecycleEvent)
*/
@Override
public void postStore(
InstanceLifecycleEvent event
) {
// nothing to do
}
/**
* Allow the legacy support to inject its valid time unique behaviour
*/
protected void basicStatePreStore(
InstanceLifecycleEvent event
) throws ServiceException {
// nothing to do
}
/* (non-Javadoc)
* @see javax.jdo.listener.DeleteLifecycleListener#postDelete(javax.jdo.listener.InstanceLifecycleEvent)
*/
public void postDelete(InstanceLifecycleEvent event) {
// Not yet supported
}
/* (non-Javadoc)
* @see javax.jdo.listener.DeleteLifecycleListener#preDelete(javax.jdo.listener.InstanceLifecycleEvent)
*/
public void preDelete(InstanceLifecycleEvent event) {
DataObject_1 persistentInstance = (DataObject_1) event.getPersistentInstance();
try {
if(
!persistentInstance.jdoIsNew() &&
!this.isStateCapableDeletable() &&
isInstanceOf(persistentInstance, "org:openmdx:state2:StateCapable") &&
!isInstanceOf(persistentInstance, "org:openmdx:state2:BasicState")
) throw new ServiceException(
BasicException.Code.DEFAULT_DOMAIN,
BasicException.Code.ILLEGAL_STATE,
"The configuration inhibits the removal of StateCapable instances unless they are new",
new BasicException.Parameter("stateCapableDeletable", this.stateCapableDeletable),
new BasicException.Parameter("state", ReducedJDOHelper.getObjectState(persistentInstance))
);
} catch (ServiceException exception) {
throw new JDOUserCallbackException(
"pre-delete callback failure",
exception,
persistentInstance
);
}
}
/* (non-Javadoc)
* @see javax.jdo.listener.StoreLifecycleListener#preStore(javax.jdo.listener.InstanceLifecycleEvent)
*/
@Override
public void preStore(
InstanceLifecycleEvent event
) {
DataObject_1 persistentInstance = (DataObject_1) event.getPersistentInstance();
if(persistentInstance.jdoIsDirty()) try {
if(isInstanceOf(persistentInstance, "org:openmdx:state2:StateCapable")) {
if(isInstanceOf(persistentInstance, "org:openmdx:state2:BasicState")){
basicStatePreStore(event);
} else {
corePreStore(persistentInstance);
}
}
} catch (ServiceException exception) {
throw new JDOUserCallbackException(
"pre-store callback failure",
exception,
persistentInstance
);
}
}
/**
* Propagate all core attributes except stateVersion to all states
*/
private void corePreStore(
DataObject_1 persistentInstance
) throws ServiceException {
Map states = persistentInstance.getAspect("org:openmdx:state2:BasicState");
if(!states.isEmpty()) {
UnitOfWork_1 unitOfWork = persistentInstance.getUnitOfWork();
Set dirtyFeatures = new HashSet(
unitOfWork.getState(persistentInstance,false).dirtyFeatures(true)
);
dirtyFeatures.removeAll(Propagation.NON_PROPAGATED_ATTRIBUTES);
if(persistentInstance.jdoIsNew() || !dirtyFeatures.isEmpty()) {
Model_1_0 model = persistentInstance.jdoGetPersistenceManager().getModel();
Map attributes = model.getAttributeDefs(
model.getElement(persistentInstance.objGetClass()),
false, // sub-types
true // includeDerived
);
for(DataObject_1_0 state: states.values()) {
for(String feature : dirtyFeatures) {
Multiplicity multiplicity = ModelHelper.getMultiplicity(attributes.get(feature));
switch(multiplicity) {
case SINGLE_VALUE: case OPTIONAL: {
Object source = persistentInstance.objGetValue(feature);
Object target = state.objGetValue(feature);
if(source == null ? target != null : !source.equals(target)) {
state.objSetValue(feature, source);
}
}
break;
case LIST: {
SortedMap source = persistentInstance.objGetSparseArray(feature);
SortedMap target = state.objGetSparseArray(feature);
if(!target.equals(source)) {
target.clear();
target.putAll(source);
}
}
break;
case SET: {
Set
