Examples of org.eclipse.persistence.sessions.DatabaseRecord

Package org.eclipse.persistence.sessions

Examples of org.eclipse.persistence.sessions.DatabaseRecord

org.eclipse.persistence.sessions.DatabaseRecord
Purpose: Define a representation of a database row as field=>value pairs. This is the database row implementation class, the Record or java.util.Map interfaces should be used to access this class instead of the implementation class.
Responsibilities:
- Implement the common hashtable collection protocol.
- Allow get and put on the field or field name.
@see DatabaseField @see Record @see java.util.Map

    /**
     * Create a new row/record for the object builder.
     * This allows subclasses to define different record types.
     */
    public AbstractRecord createRecord(int size, AbstractSession session) {
        return new DatabaseRecord(size);
    }

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    public void cacheForeignKeyValues(AbstractRecord databaseRecord, CacheKey cacheKey, AbstractSession session) {
        Set<DatabaseField> foreignKeys = this.descriptor.getForeignKeyValuesForCaching();
        if (foreignKeys.isEmpty()) {
            return;
        }
        DatabaseRecord cacheRecord = new DatabaseRecord(foreignKeys.size());
        for (DatabaseField field : foreignKeys) {
            cacheRecord.put(field, databaseRecord.get(field));
        }
        cacheKey.setProtectedForeignKeys(cacheRecord);
        
    }

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    public void cacheForeignKeyValues(Object source, CacheKey cacheKey, ClassDescriptor descriptor, AbstractSession session) {
        Set<DatabaseField> foreignKeys = this.descriptor.getForeignKeyValuesForCaching();
        if (foreignKeys.isEmpty()) {
            return;
        }
        DatabaseRecord cacheRecord = new DatabaseRecord(foreignKeys.size());
        for (DatabaseField field : foreignKeys) {
            cacheRecord.put(field, extractValueFromObjectForField(source, field, session));
        }
        cacheKey.setProtectedForeignKeys(cacheRecord);
    }

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            //do not reset the query if we are using field locking
            if (!hasDeleteQuery()) {
                // Prepare delete query always.
                setDeleteQuery(new DeleteObjectQuery());
            }
            getDeleteQuery().setModifyRow(new DatabaseRecord());
        }


        if (hasUpdateQuery()) {
            // Do not prepare to update by default to allow minimal update.
            getUpdateQuery().setModifyRow(getDescriptor().getObjectBuilder().buildTemplateUpdateRow(session));

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            aggregate = readFromRowIntoObject(row, null, targetObject, null, query, query.getSession(), true);
        } else {
            if(changeSet != null) {
                aggregateChangeSet = getReferenceDescriptor(aggregate, query.getSession()).getObjectBuilder().createObjectChangeSet(aggregate, (UnitOfWorkChangeSet)((UnitOfWorkImpl)query.getSession()).getUnitOfWorkChangeSet(), true, query.getSession());
            }
            AbstractRecord aggregateRow = new DatabaseRecord();
            int size = row.size();
            List fields = row.getFields();
            List values = row.getValues();
            List aggregateFields = getReferenceFields(); 
            for(int i=0; i < size; i++) {
                DatabaseField field = (DatabaseField)fields.get(i);
                if(aggregateFields.contains(field)) {
                    aggregateRow.add(field, values.get(i));
                }
            }


            getObjectBuilder(aggregate, query.getSession()).assignReturnRow(aggregate, query.getSession(), aggregateRow, aggregateChangeSet);
        }

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            }
            fieldStartIndex = ((Integer)map.get(cls)).intValue();
        }
        Vector trimedFields = new NonSynchronizedSubVector(row.getFields(), fieldStartIndex, row.size());
        Vector trimedValues = new NonSynchronizedSubVector(row.getValues(), fieldStartIndex, row.size());
        return new DatabaseRecord(trimedFields, trimedValues);
    }

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    /**
     * INTERNAL:
     */
    protected AbstractRecord createModifyRowForAddTargetQuery() {
        AbstractRecord modifyRow = new DatabaseRecord();
        containerPolicy.addFieldsForMapKey(modifyRow);
        if(listOrderField != null) {
            modifyRow.add(listOrderField, null);
        }
        return modifyRow;
    }

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            DatabaseField targetPrimaryKey = targetPrimaryKeyFields.get(index);
            Expression expression = builder.getField(targetPrimaryKey).equal(builder.getParameter(targetPrimaryKey));
            whereClause = expression.and(whereClause);
        }


        AbstractRecord modifyRow = new DatabaseRecord();
        modifyRow.add(this.listOrderField, null);


        SQLUpdateStatement statement = new SQLUpdateStatement();
        statement.setTable(table);
        statement.setWhereClause(whereClause);
        statement.setModifyRow(modifyRow);

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            DatabaseField targetPrimaryKey = targetPrimaryKeyFields.get(index);
            Expression expression = builder.getField(targetPrimaryKey).equal(builder.getParameter(targetPrimaryKey));
            whereClause = expression.and(whereClause);
        }


        AbstractRecord modifyRow = new DatabaseRecord();
        if(shouldRemoveTargetQueryModifyTargetForeignKey()) {
            size = targetForeignKeyFields.size();
            for (int index = 0; index < size; index++) {
                DatabaseField targetForeignKey = targetForeignKeyFields.get(index);
                modifyRow.put(targetForeignKey, null);
                Expression expression = builder.getField(targetForeignKey).equal(builder.getParameter(targetForeignKey));
                whereClause = expression.and(whereClause);
            }
        }
        if(listOrderField != null) {
            modifyRow.add(listOrderField, null);
        }


        SQLUpdateStatement statement = new SQLUpdateStatement();
        statement.setTable(table);
        statement.setWhereClause(whereClause);

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        // Build where clause expression.
        Expression whereClause = null;
        Expression builder = new ExpressionBuilder();


        AbstractRecord modifyRow = new DatabaseRecord();
        int size = targetForeignKeyFields.size();
        for (int index = 0; index < size; index++) {
            DatabaseField targetForeignKey = targetForeignKeyFields.get(index);
            if(shouldRemoveTargetQueryModifyTargetForeignKey()) {
                modifyRow.put(targetForeignKey, null);
            }
            Expression expression = builder.getField(targetForeignKey).equal(builder.getParameter(targetForeignKey));
            whereClause = expression.and(whereClause);
        }
        if(this.listOrderField != null) {
            // targetForeignKeys and listOrderField should have the same table
            modifyRow.add(this.listOrderField, null);
        }


        SQLUpdateStatement statement = new SQLUpdateStatement();
        statement.setTable(table);
        statement.setWhereClause(whereClause);

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