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package org.litesoft.bo.views.server; import java.util.*; import org.litesoft.bo.attributes.*; import org.litesoft.bo.change.*; import org.litesoft.bo.views.*; import org.litesoft.bo.views.communication.*; import org.litesoft.core.simpletypes.*; import org.litesoft.core.typeutils.*; import org.litesoft.core.util.*; import org.litesoft.orsup.base.*; import org.litesoft.orsup.selection.*; import org.litesoft.orsup.transact.*; public class PoServerVoDataProvider<T extends IViewObject> extends AbstractServerRequestRowOrRowsVoDataProvider<T> { public static final WhereClauseFactory WCF = WhereClauseFactory.INSTANCE; private static final String VO_ID_ATTRIBUTE_NAME = "ID"; protected MetaDataForPO mPOMetaData = null; protected AttributeAccessorSCD<PersistentObject<?>> mPrimaryKeyASCD; protected POrecordVersion mPOrecordVersion = POrecordVersion.INSTANCE; @SuppressWarnings({"UnusedDeclaration"}) public PoServerVoDataProvider( VoMetaData<T> pVOMetaData, MetaDataForPO pPOMetaData ) { super( pVOMetaData ); mPOMetaData = pPOMetaData; } public PoServerVoDataProvider( VoMetaData<T> pVOMetaData, MetaDataStore pMetaDataStore ) { super( pVOMetaData ); String zType = Strings.noEmpty( mVOMetaData.getDerivedFromRegisteredObjectType() ); if ( zType == null ) { throw new PersistenceException( "ViewObject '" + pVOMetaData.getObjectName() + "' does not indicate Derived From!" ); } if ( null == (mPOMetaData = pMetaDataStore.getMetaDataOptionallyByIdentifier( zType )) ) { mPOMetaData = pMetaDataStore.getMetaDataRequired( zType ); } } @Override protected void LLinitialize() { super.LLinitialize(); AttributeAccessorSCD<PersistentObject<?>>[] zSCDs = mPOMetaData.getKeySet().getKeyAttributeAccessorSCDs(); if ( zSCDs.length != 1 ) { throw new PersistenceException( "POs w/ Multiple Primary Keys or no Primary Key are not supported" + this ); } Class<?> zVoIDtype = mVOMetaData.getVoAttribute( VO_ID_ATTRIBUTE_NAME ).getType().getType(); Class zPoIDtype = (mPrimaryKeyASCD = zSCDs[0]).getColumnType(); if ( !zPoIDtype.equals( zVoIDtype ) ) { throw new PersistenceException( "Mismatched column types VO: " + zVoIDtype + " != " + zPoIDtype + " :PO" + this ); } String zRecordVersionAttributeName = mPOMetaData.getRecordVersionAttributeName(); if ( Strings.isNotNullOrEmpty( zRecordVersionAttributeName ) ) { mPOrecordVersion = new POrecordVersionImpl( zRecordVersionAttributeName ); } } @SuppressWarnings({"UnusedDeclaration"}) protected void assertMatchingVOsALL( Integer pMaxToReturn, SSMap[] pORed_ANDFilters ) { if ( pMaxToReturn != null ) { throw new IllegalStateException( "MaxToReturn not supported for: " + getVOMetaData().getViewObjectClass().getSimpleName() ); } if ( (pORed_ANDFilters != null) && (pORed_ANDFilters.length != 0) ) { throw new IllegalStateException( "Only auto filtering supported for: " + getVOMetaData().getViewObjectClass().getSimpleName() ); } } public T createView( PersistentObject pPO, boolean pOnlyQueryAttributes ) { return (pPO != null) ? LLcreateView( pPO, pOnlyQueryAttributes, false ) : null; } public T LLcreateView( PersistentObject pPO, boolean pOnlyQueryAttributes, boolean pExtraFlag ) { T zVO = mVOMetaData.createViewObject( false, null ); zVO.setRecordVersion( mPOrecordVersion.get( pPO ) ); zVO.setAttributeValue( VO_ID_ATTRIBUTE_NAME, mPrimaryKeyASCD.getValueOnPO( pPO ) ); updateView( zVO, pPO, pOnlyQueryAttributes, pExtraFlag ); zVO.initialize(); return zVO; } @SuppressWarnings({"UnusedParameters"}) public void updateView( T pVO, PersistentObject pPO, boolean pOnlyQueryAttributes, boolean pExtraFlag ) { String[] zAttributeNames = mVOMetaData.getAttributeNames(); for ( String zAttributeName : zAttributeNames ) { VoAttribute<T> zAttribute = mVOMetaData.getVoAttribute( zAttributeName ); if ( zAttribute.isQueryViewAttribute() || !pOnlyQueryAttributes ) { String zPath = zAttribute.getDerivedFromAttributePath(); if ( Strings.isNotNullOrEmpty( zPath ) ) { Object zValueOnPO = getDottedAttributeValue( pPO, zPath ); pVO.setAttributeValue( zAttributeName, zValueOnPO ); } } } } public void updatePO( PersistentObject pPO, T pMember ) { String[] zAttributeNames = mVOMetaData.getAttributeNames(); for ( String zAttributeName : zAttributeNames ) { VoAttribute<T> zAttribute = mVOMetaData.getVoAttribute( zAttributeName ); String zPath = zAttribute.getDerivedFromAttributePath(); if ( Strings.isNotNullOrEmpty( zPath ) ) { Mutability zMutability = zAttribute.getMutability(); if ( Mutability.RW.equals( zMutability ) || (pPO.isNew() && Mutability.AddOnly.equals( zMutability )) ) { setDottedAttributeValue( pPO, zPath, pMember.getAttributeValue( zAttributeName ) ); } } } } public PersistentObject getAndUpdatePO( Transaction pTransaction, T pMember ) { PersistentObject zPO = getTransactionPO( pTransaction, pMember ); updatePO( zPO, pMember ); return zPO; } public PersistentObject getTransactionPO( Transaction pTransaction, T pMember ) { return pMember.isNew() ? createNewPO( pTransaction, pMember ) : getUpdatableExistingPO( pTransaction, pMember ); } public PersistentObject getUpdatableExistingPO( Transaction pTransaction, T pMember ) { PersistentObject zPO = getExistingPO( pTransaction, pMember ); if ( zPO == null ) { throw new ConcurrentPOModificationException( "No Persisted data for '" + pMember + "', it may have been deleted" ); } if ( !Objects.areNonArraysEqual( pMember.getRecordVersion(), mPOrecordVersion.get( zPO ) ) ) { throw new ConcurrentPOModificationException( "Persisted data for '" + pMember + "' has been updated, please refresh and try again" ); } return zPO; } public PersistentObject getExistingPO( Finder pFinder, T pMember ) { return findPO( pFinder, pMember.getID() ); } @SuppressWarnings({"UnusedParameters"}) public PersistentObject createNewPO( Transaction pTransaction, T pMember ) { return mPOMetaData.createNew( pTransaction ); } public PersistentObject getPO( Object pDBValueForPrimaryKey ) { return findPO( DataStoreLocator.get().getUnfilteredFinder(), pDBValueForPrimaryKey ); } @SuppressWarnings({"UnnecessaryLocalVariable"}) public PersistentObject findPO( Finder pFinder, Object pDBValueForPrimaryKey ) { PersistentObjectUniqueKey zPOUK = new UniqueKeySingle( mPrimaryKeyASCD, pDBValueForPrimaryKey ); PersistentObject zPO = pFinder.findOne( mPOMetaData.getPOregistrationName(), zPOUK ); return zPO; } /** * Get a single VO based on an ObjectURL * * @param pObjectURL if null, null will be return * * @return single VO found (matches), or null if not found (or pObjectURL is null) * * @throws PersistenceException if there was an underlying exception! */ @Override public T getVOby( ObjectURL pObjectURL ) throws PersistenceException { if ( pObjectURL != null ) { if ( !mVOMetaData.getObjectName().equals( pObjectURL.getObjectName() ) ) { throw new PersistenceException( "Unacceptable ObjectName: " + pObjectURL.getObjectName() + this ); } ObjectUniqueKey zObjectUniqueKey = pObjectURL.getObjectUniqueKey(); if ( !zObjectUniqueKey.isForNewObject() ) { return createVObyURLkey( zObjectUniqueKey ); } } return null; } protected T createVObyURLkey( ObjectUniqueKey pObjectUniqueKey ) { PersistentObject zPO = findPO( DataStoreLocator.get().getUnfilteredFinder(), pObjectUniqueKey.getParsedID() ); return createView( zPO, false ); } /** * Get all Matching VO(s) with the supplied URLs. * * @param pObjectURLs the URLs for the VOs to fetch. * * @return a SizedIterator, if the rows found are <= pMaxToReturn then the size indicated will match the rows returned by iterating, otherwise, the state of the iterator is unspecified. * * @throws PersistenceException if there was an underlying exception! */ @Override public SizedIterator<T> getMatchingVOs( ObjectURL... pObjectURLs ) throws PersistenceException { if ( pObjectURLs != null ) { List<Object> zKeys = new ArrayList<Object>(); for ( ObjectURL zURL : pObjectURLs ) { if ( zURL != null ) { if ( !mVOMetaData.getObjectName().equals( zURL.getObjectName() ) ) { throw new PersistenceException( "Unacceptable ObjectName: " + zURL.getObjectName() + this ); } ObjectUniqueKey zObjectUniqueKey = zURL.getObjectUniqueKey(); if ( !zObjectUniqueKey.isForNewObject() ) { zKeys.add( zObjectUniqueKey.getParsedID() ); } } } if ( !zKeys.isEmpty() ) { POQueryIterator zPOs = findAllCursored( DataStoreLocator.get().getUnfilteredFinder(), augment_getMatchingVOs( WCF.isAnyFrom( mPrimaryKeyASCD, zKeys ) ), null ); return new SizedIterator<T>( new PoToVoIterator<T>( false, zPOs ) ); } } return new SizedIterator<T>( new PoToVoIterator<T>( false, NullIterator.getInstance() ) ); } /** * Get all Matching VO(s) by the supplied criteria (Not to exceed the pMaxToReturn). * * @param pMaxToReturn if ! null, then if there are more then the pMaxToReturn that match, return none, but indicate how many would have been returned. * @param pORed_ANDFilters - OR the criteria of each map, where each map is the ANDing of the attribute values (Note: if No Maps are given then return ALL) * * @return a SizedIterator, if the rows found are <= pMaxToReturn then the size indicated will match the rows returned by iterating, otherwise, the state of the iterator is unspecified. * * @throws PersistenceException if there was an underlying exception! */ @Override public SizedIterator<T> getMatchingVOs( Integer pMaxToReturn, SSMap... pORed_ANDFilters ) throws PersistenceException { WhereClause zWhereClause = new WhereClauseSupport( DataStoreLocator.get().getUnfilteredFinder(), mPOMetaData, mVOMetaData ).createWhereClause( pORed_ANDFilters ); return getMatchingVOs( pMaxToReturn, getMatchingVOsOnlyQueryAttributesFlag(), zWhereClause, augment_getMatchingVOs( createDefaultOrderBy() ) ); } protected SizedIterator<T> getMatchingVOs( Integer pMaxToReturn, boolean pOnlyQueryAttributes, WhereClause pWhereClause, OrderBy pOrderBy ) { pWhereClause = augment_getMatchingVOs( pWhereClause ); UnfilteringFinder zFinder = DataStoreLocator.get().getUnfilteredFinder(); POQueryIterator zPOs = findAllCursored( zFinder, pWhereClause, pOrderBy ); if ( pMaxToReturn == null ) { return new SizedIterator<T>( new PoToVoIterator<T>( pOnlyQueryAttributes, zPOs ) ); } List<PersistentObject> zList = new ArrayList<PersistentObject>(); for ( int max = pMaxToReturn; zPOs.hasNext(); zList.add( zPOs.next() ) ) { if ( --max < 0 ) { zPOs.dispose(); return new SizedIterator<T>( zFinder.count( mPOMetaData.getPOregistrationName(), pWhereClause ) ); } } zPOs.dispose(); return new SizedIterator<T>( new PoToVoIterator<T>( pOnlyQueryAttributes, zList.iterator() ) ); } protected boolean getMatchingVOsOnlyQueryAttributesFlag() { return true; } protected OrderBy augment_getMatchingVOs( OrderBy pOrderBy ) { return pOrderBy; } protected OrderBy createDefaultOrderBy() { // mPOMetaData return null; // todo... } protected WhereClause augment_getMatchingVOs( WhereClause pWhereClause ) { return pWhereClause; } protected POQueryIterator findAllCursored( UnfilteringFinder pFinder, WhereClause pWhereClause, OrderBy pOrderBy ) { return pFinder.findAllCursored( mPOMetaData.getPOregistrationName(), pWhereClause, pOrderBy ); } protected class PoToVoIterator<VO> extends AbstractReadOnlyIterator<VO> { private boolean mOnlyQueryAttributes; private Iterator mIterator; public PoToVoIterator( boolean pOnlyQueryAttributes, Iterator pIterator ) { mOnlyQueryAttributes = pOnlyQueryAttributes; mIterator = pIterator; } @SuppressWarnings({"unchecked"}) @Override public VO next() { return (VO) createView( (PersistentObject) mIterator.next(), mOnlyQueryAttributes ); } @Override public boolean hasNext() { return mIterator.hasNext(); } @Override public void dispose() { if ( mIterator instanceof Disposable ) { ((Disposable) mIterator).dispose(); } } } protected void setDottedAttributeValue( PersistentObject pPO, String pPath, Object pAttributeValue ) { for ( int zDotAt; -1 != (zDotAt = pPath.indexOf( '.' )); pPath = pPath.substring( zDotAt + 1 ) ) { String zAttributeName = pPath.substring( 0, zDotAt ); pPO = getToOne( pPO, zAttributeName ); } setAttributeValue( pPO, pPath, pAttributeValue ); } protected PersistentObject getToOne( PersistentObject pPO, String pAttributeName ) { Object zValue = getAttributeValue( pPO, pAttributeName ); if ( zValue instanceof PersistentObject ) { return (PersistentObject) zValue; } throw new PersistenceException( "Invalid ToOne Attribute '" + pAttributeName + "' requested on PO: " + pPO ); } protected Object getDottedAttributeValue( PersistentObject pPO, String pPath ) { for ( int zDotAt; -1 != (zDotAt = pPath.indexOf( '.' )); pPath = pPath.substring( zDotAt + 1 ) ) { String zAttributeName = pPath.substring( 0, zDotAt ); Object zValue = getAttributeValue( pPO, zAttributeName ); if ( !(zValue instanceof PersistentObject) ) { if ( zValue != null ) { LOGGER.error.log( "Invalid ToOne Attribute '", zAttributeName, "' requested on PO: " + pPO ); } return null; } pPO = (PersistentObject) zValue; } return getAttributeValue( pPO, pPath ); } @SuppressWarnings({"unchecked"}) protected void setAttributeValue( PersistentObject pPO, String pAttributeName, Object pAttributeValue ) { AttributeAccessorSCD zASCD = pPO.getMetaDataForPO().getAccessorSCDrequired( pAttributeName ); Mutability zMutability = zASCD.getMutability(); if ( Mutability.RW.equals( zMutability ) || (pPO.isNew() && Mutability.AddOnly.equals( zMutability )) ) { if ( !pPO.isNew() || !zASCD.isRequired() || (pAttributeValue != null) ) { zASCD.setValueOnPO( pPO, pAttributeValue ); } } } @SuppressWarnings({"unchecked"}) protected Object getAttributeValue( PersistentObject pPO, String pAttributeName ) { AttributeAccessorSCD zASCD = pPO.getMetaDataForPO().getAccessorSCDoptional( pAttributeName ); if ( zASCD != null ) { return zASCD.getValueOnPO( pPO ); } LOGGER.error.log( "Invalid Attribute '", pAttributeName, "' requested on PO: " + pPO ); return null; } /** * ACIDly update the Backing Persistence Engine (DB?) with rows from the pTransactionSet. * * @param pTransactionSet !null * @param pReturnOnSuccess the SCresult will contain a VO (of type T) (which may be null) entry for each VO originally in the pTransactionSet whose original ObjectURL matches the entry in this array (dups allowed). * * @return a Relatively complex object that is used to manage Caches. * * @throws PersistenceException if there was an underlying exception! */ @Override public SCresult requestCommit( TransactionSet pTransactionSet, ObjectURL... pReturnOnSuccess ) throws PersistenceException { SCresult rv = new SCresult(); Map<ObjectURL, VoPoPair> zURLsToSaved = new HashMap<ObjectURL, VoPoPair>(); Set<ViewObject> zMembers = ValidateTransactionSet( pTransactionSet ); if ( !zMembers.isEmpty() ) { Transaction zTransaction = DataStoreLocator.get().getUnfilteredFinder().createUnaugmentedTransaction(); try { prepopulateTransaction( zTransaction, zMembers ); for ( ViewObject<?> zMember : zMembers ) { if ( zMember instanceof Precommitable ) { ((Precommitable) zMember).aboutToCommit(); } PersistentObject zPO = getAndUpdatePO( zTransaction, zMember, // mVOMetaData.getObjectName().equals( zMember.getObjectName() ) ? // this : getNotUsDataProvider( zMember ) ); zURLsToSaved.put( zMember.getObjectURL(), new VoPoPair( zMember, zPO ) ); } commit( zTransaction ); } catch ( ConcurrentPOModificationException e ) { return VOSC.result( e.getMessage() ); } for ( ViewObject<?> zVO : zMembers ) { committedVO( zVO, zURLsToSaved.get( zVO.getObjectURL() ) ); } pTransactionSet.clear(); } ArrayList<T> zRequestedBack = new ArrayList<T>(); if ( pReturnOnSuccess != null ) { for ( ObjectURL zObjectURL : pReturnOnSuccess ) { zRequestedBack.add( createViewForCommitReturn( false, zURLsToSaved.get( zObjectURL ) ) ); } } return rv.setSCresponse( new VOSCresponseRows( new ImmutableArrayList<T>( zRequestedBack ) ) ); } protected void commit( Transaction pTransaction ) { pTransaction.commit(); } @SuppressWarnings({"unchecked"}) private PersistentObject getAndUpdatePO( Transaction pTransaction, ViewObject<?> zMember, PoServerVoDataProvider pDataProvider ) { return pDataProvider.getAndUpdatePO( pTransaction, zMember ); } private void prepopulateTransaction( Transaction pTransaction, Collection<ViewObject> pMembers ) { List<ViewObject> zNotUs = new ArrayList<ViewObject>(); List<Object> zOurKeys = new ArrayList<Object>(); for ( ViewObject zMember : pMembers ) { if ( !zMember.isNew() ) { if ( mVOMetaData.getObjectName().equals( zMember.getObjectName() ) ) { zOurKeys.add( zMember.getID() ); } else { zNotUs.add( zMember ); } } } if ( !zOurKeys.isEmpty() ) { pTransaction.findAll( mPOMetaData.getPOregistrationName(), WCF.isAnyFrom( mPrimaryKeyASCD, zOurKeys ) ); } if ( !zNotUs.isEmpty() ) { getNotUsDataProvider( zNotUs.get( 0 ) ).prepopulateTransaction( pTransaction, zNotUs ); } } @SuppressWarnings({"unchecked"}) protected <VoType extends IViewObject> PoServerVoDataProvider<VoType> getNotUsDataProvider( Class<VoType> pViewObjectClass ) { return (PoServerVoDataProvider<VoType>) getNotUsDataProvider( pViewObjectClass.getName() ); } protected PoServerVoDataProvider getNotUsDataProvider( ViewObject pViewObject ) { return getNotUsDataProvider( pViewObject.getClass().getName() ); } private PoServerVoDataProvider getNotUsDataProvider( String pObjectName ) { ServerVoDataProvider<IViewObject> zDataProvider = getServerVoDataProviderMap().get( pObjectName ); if ( !(zDataProvider instanceof PoServerVoDataProvider) ) { throw new PersistenceException( "TransactionSet contained a VO '" + pObjectName + "' not currently supported by a PoServerVoDataProvider" ); } return (PoServerVoDataProvider) zDataProvider; } protected Set<ViewObject> ValidateTransactionSet( TransactionSet pTransactionSet ) { Set<ViewObject> zMembers = pTransactionSet.getAllMembers(); for ( ViewObject zMember : zMembers ) { if ( validateMember( zMember ) ) { return zMembers; } } throw new PersistenceException( "Base View: " + mVOMetaData.getObjectName() + " not in TransactionSet" ); } protected boolean validateMember( ViewObject pMember ) { return pMember.getObjectName().equals( mVOMetaData.getObjectName() ); } protected T createViewForCommitReturn( boolean pOnlyQueryAttributes, VoPoPair pVoPoPair ) { if ( pVoPoPair != null ) { if ( validateMember( pVoPoPair.getVO() ) ) { return createView( pVoPoPair.getPO(), pOnlyQueryAttributes ); } } return null; } private void committedVO( ViewObject<?> pVO, VoPoPair pVoPoPair ) { pVO.committed( getID( pVoPoPair ) ); } private Object getID( VoPoPair pVoPoPair ) { return (pVoPoPair != null) ? TypeConverter.to_Long( getAttributeValue( pVoPoPair.getPO(), VO_ID_ATTRIBUTE_NAME ) ) : null; } protected static class POrecordVersion { public static final POrecordVersion INSTANCE = new POrecordVersion(); public Long get( PersistentObject pPO ) { return null; } } private static class POrecordVersionImpl extends POrecordVersion { private String mRecordVersionAttributeName; private POrecordVersionImpl( String pRecordVersionAttributeName ) { mRecordVersionAttributeName = pRecordVersionAttributeName; } @Override public Long get( PersistentObject pPO ) { return TypeConverter.to_Long( pPO.getAttributeValue( mRecordVersionAttributeName ) ); } } @Override public String toString() { return " (" + getClass().getSimpleName() + ": " + mVOMetaData.getObjectName() + " <-> " + mPOMetaData.getIdentifierName() + ")"; } protected static class VoPoPair { private ViewObject<?> mVO; private PersistentObject mPO; public VoPoPair( ViewObject<?> pVO, PersistentObject pPO ) { mVO = pVO; mPO = pPO; } public ViewObject<?> getVO() { return mVO; } public PersistentObject getPO() { return mPO; } } } |