Examples of org.eclipse.persistence.sequencing.Sequence

Package org.eclipse.persistence.sequencing

Examples of org.eclipse.persistence.sequencing.Sequence

org.eclipse.persistence.sequencing.Sequence

Purpose: Abstract class to define sequencing.
Description A sequence defines how generated ids are obtained. The main sequence types are TableSequence and NativeSequence. Descriptors using sequencing will use the sequence object defined in their session's DatabaseLogin with the name matching their sequence name. If a specific sequence is not defined for the name the DatabaseLogin's default sequence will be used. @see TableSequence @see NativeSequence

     * @return the qualified table name  
     */
    protected String getSequenceTableName(Session session) {
        String sequenceTableName = null;
        if (session.getProject().usesSequencing()) {
            Sequence sequence = session.getLogin().getDefaultSequence();
            if (sequence instanceof TableSequence) {
                sequenceTableName = ((TableSequence)sequence).getTableName();
            }
        }
        return sequenceTableName;

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        login.setUsesExternalTransactionController(loginConfig.getExternalTransactionController());


        // Sequencing - XML Schema default is null
        if (loginConfig.getSequencingConfig() != null) {
            if (loginConfig.getSequencingConfig().getDefaultSequenceConfig() != null) {
                Sequence sequence = buildSequence(loginConfig.getSequencingConfig().getDefaultSequenceConfig());
                login.setDefaultSequence(sequence);
            }


            if ((loginConfig.getSequencingConfig().getSequenceConfigs() != null) && !loginConfig.getSequencingConfig().getSequenceConfigs().isEmpty()) {
                Enumeration eSequenceConfigs = loginConfig.getSequencingConfig().getSequenceConfigs().elements();


                while (eSequenceConfigs.hasMoreElements()) {
                    Sequence sequence = buildSequence((SequenceConfig)eSequenceConfigs.nextElement());
                    login.addSequence(sequence);
                }
            }
        }

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            return new UnaryTableSequence(name, size, utsc.getCounterField());
        } else if (sequenceConfig instanceof XMLFileSequenceConfig) {
            try {
                // Can no longer reference class directly as in a different project.
                Class xmlClass = Class.forName("org.eclipse.persistence.eis.adapters.xmlfile.XMLFileSequence");
                Sequence sequence = (Sequence)xmlClass.newInstance();
                sequence.setName(name);
                sequence.setInitialValue(size);
                return sequence;
            } catch (Exception missing) {
                return null;
            }
        } else {

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            FieldDefinition fieldDef = getFieldDefFromDBField(dbField, isPKField);
            if (isPKField) {
                // Check if the generation strategy is IDENTITY
                String sequenceName = desc.getSequenceNumberName();
                DatabaseLogin login = project.getLogin();
                Sequence seq = login.getSequence(sequenceName);
                if(seq instanceof DefaultSequence) {
                    seq = login.getDefaultSequence();
                }
                //The native sequence whose value should be acquired after insert is identity sequence
                boolean isIdentity = seq instanceof NativeSequence && seq.shouldAcquireValueAfterInsert();
                fieldDef.setIsIdentity(isIdentity);
            }


            //find the table the field belongs to, and add it to the table, only if not already added.
            tblDef = tableMap.get(dbField.getTableName());

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            if (!descriptor.usesSequenceNumbers()) {
                continue;
            }
            if (descriptor.getSequenceNumberField().equals(field)) {
                String seqName = descriptor.getSequenceNumberName();
                Sequence sequence = getSequence(seqName);
                shouldAcquireSequenceValueAfterInsert = sequence.shouldAcquireValueAfterInsert();
                break;
            }
        }
        return shouldAcquireSequenceValueAfterInsert;
    }

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            }
        } else {
            if ((projectPlatform.getSequences() != null) && !projectPlatform.getSequences().isEmpty()) {
                Iterator itProjectSequences = projectPlatform.getSequences().values().iterator();
                while (itProjectSequences.hasNext()) {
                    Sequence sequence = (Sequence)itProjectSequences.next();
                    if (!sessionPlatform.getSequences().containsKey(sequence.getName())) {
                        sessionPlatform.addSequence(sequence);
                    }
                }
            }
        }

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            if (isPKField) {
                fieldDef.setIsPrimaryKey(true);
                // Check if the generation strategy is IDENTITY
                String sequenceName = descriptor.getSequenceNumberName();
                DatabaseLogin login = this.project.getLogin();
                Sequence seq = login.getSequence(sequenceName);
                if(seq instanceof DefaultSequence) {
                    seq = login.getDefaultSequence();
                }
                //The native sequence whose value should be acquired after insert is identity sequence
                boolean isIdentity = seq instanceof NativeSequence && seq.shouldAcquireValueAfterInsert();
                fieldDef.setIsIdentity(isIdentity);
            }


            //find the table the field belongs to, and add it to the table, only if not already added.
            tableDefintion = this.tableMap.get(dbField.getTableName());

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            }
        } else {
            if ((projectPlatform.getSequences() != null) && !projectPlatform.getSequences().isEmpty()) {
                Iterator itProjectSequences = projectPlatform.getSequences().values().iterator();
                while (itProjectSequences.hasNext()) {
                    Sequence sequence = (Sequence)itProjectSequences.next();
                    if (!sessionPlatform.getSequences().containsKey(sequence.getName())) {
                        sessionPlatform.addSequence(sequence);
                    }
                }
            }
        }

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                // Here the default table name should come from the platform 
                // in case the current one is not legal for this platform (e.g.
                // SEQUENCE for Symfoware). We should always try to avoid making
                // metadata changes after processing and ensure we always 
                // process with the correct and necessary metadata.
                Sequence seq = m_session.getDatasourcePlatform().getDefaultSequence();
                String defaultTableGeneratorName = (seq instanceof TableSequence) ? ((TableSequence) seq).getTableName() : DEFAULT_TABLE_GENERATOR;
                // Process the default values.
                processTable(tableGenerator, defaultTableGeneratorName, getPersistenceUnitDefaultCatalog(), getPersistenceUnitDefaultSchema());
                
                sequences.put(DEFAULT_TABLE_GENERATOR, tableGenerator.process(m_logger));

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            }
        } else {
            if ((projectPlatform.getSequences() != null) && !projectPlatform.getSequences().isEmpty()) {
                Iterator itProjectSequences = projectPlatform.getSequences().values().iterator();
                while (itProjectSequences.hasNext()) {
                    Sequence sequence = (Sequence)itProjectSequences.next();
                    if (!sessionPlatform.getSequences().containsKey(sequence.getName())) {
                        sessionPlatform.addSequence(sequence);
                    }
                }
            }
        }

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