Examples of org.apache.cassandra.db.marshal.AbstractType

org.apache.cassandra.db.marshal.AbstractType
Specifies a Comparator for a specific type of ByteBuffer. Note that empty ByteBuffer are used to represent "start at the beginning" or "stop at the end" arguments to get_slice, so the Comparator should always handle those values even if they normally do not represent a valid ByteBuffer for the type being compared.

    private static void addToSuperCF(Map<?, ?> row, ColumnFamily cfamily)
    {
        CFMetaData metaData = cfamily.metadata();
        assert metaData != null;


        AbstractType comparator = metaData.comparator;


        // Super columns
        for (Map.Entry<?, ?> entry : row.entrySet())
        {
            Map<?, ?> data = (Map<?, ?>) entry.getValue();

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            cf = ColumnFamily.serializer().deserializeFromSSTableNoColumns(ssTable.makeColumnFamily(), file);
            file.readInt(); // column count


            /* get the various column ranges we have to read */
            AbstractType comparator = ssTable.getColumnComparator();
            SortedSet<IndexHelper.IndexInfo> ranges = new TreeSet<IndexHelper.IndexInfo>(IndexHelper.getComparator(comparator));
            for (byte[] name : filteredColumnNames)
            {
                int index = IndexHelper.indexFor(name, indexList, comparator, false);
                if (index == indexList.size())
                    continue;
                IndexHelper.IndexInfo indexInfo = indexList.get(index);
                if (comparator.compare(name, indexInfo.firstName) < 0)
                   continue;
                ranges.add(indexInfo);
            }


            /* seek to the correct offset to the data */

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    }


    public void collectReducedColumns(IColumnContainer container, Iterator<IColumn> reducedColumns, int gcBefore)
    {
        int liveColumns = 0;
        AbstractType comparator = container.getComparator();


        while (reducedColumns.hasNext())
        {
            if (liveColumns >= count)
                break;


            IColumn column = reducedColumns.next();
            if (logger.isDebugEnabled())
                logger.debug("collecting " + column.getString(comparator));


            if (finish.length > 0
                && ((!reversed && comparator.compare(column.name(), finish) > 0))
                    || (reversed && comparator.compare(column.name(), finish) < 0))
                break;


            // only count live columns towards the `count` criteria
            if (!column.isMarkedForDelete()
                && (!container.isMarkedForDelete()

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    }


    private List<AbstractType> getDefaultMarshallers(CfDef cfDef) throws IOException
    {
        ArrayList<AbstractType> marshallers = new ArrayList<AbstractType>();
        AbstractType comparator;
        AbstractType subcomparator;
        AbstractType default_validator;
        AbstractType key_validator;


        comparator = parseType(cfDef.getComparator_type());
        subcomparator = parseType(cfDef.getSubcomparator_type());
        default_validator = parseType(cfDef.getDefault_validation_class());
        key_validator = parseType(cfDef.getKey_validation_class());

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        Map<ByteBuffer, AbstractType> validators = new HashMap<ByteBuffer, AbstractType>();
        for (ColumnDef cd : cfDef.getColumn_metadata())
        {
            if (cd.getValidation_class() != null && !cd.getValidation_class().isEmpty())
            {
                AbstractType validator = null;
                try
                {
                    validator = TypeParser.parse(cd.getValidation_class());
                    validators.put(cd.name, validator);
                }

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                throw new Exception("Bad scheme.");
            String[] urlParts = location.split("\\?");
            if (urlParts.length > 1)
            {
                Map<String, String> urlQuery = getQueryMap(urlParts[1]);
                AbstractType comparator = BytesType.instance;
                if (urlQuery.containsKey("comparator"))
                    comparator = TypeParser.parse(urlQuery.get("comparator"));
                if (urlQuery.containsKey("slice_start"))
                    slice_start = comparator.fromString(urlQuery.get("slice_start"));
                if (urlQuery.containsKey("slice_end"))
                    slice_end = comparator.fromString(urlQuery.get("slice_end"));
                if (urlQuery.containsKey("reversed"))
                    slice_reverse = Boolean.parseBoolean(urlQuery.get("reversed"));
                if (urlQuery.containsKey("limit"))
                    limit = Integer.parseInt(urlQuery.get("limit"));
            }

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            ResourceFieldSchema idxColSchema = new ResourceFieldSchema();
            idxColSchema.setName("name");
            idxColSchema.setType(getPigType(marshallers.get(0)));


            ResourceFieldSchema valSchema = new ResourceFieldSchema();
            AbstractType validator = validators.get(cdef.name);
            if (validator == null)
                validator = marshallers.get(1);
            valSchema.setName("value");
            valSchema.setType(getPigType(validator));


            innerTupleSchema.setFields(new ResourceFieldSchema[] { idxColSchema, valSchema });
            allSchemaFields.add(innerTupleField);
        }
        // bag at the end for unknown columns
        allSchemaFields.add(bagField);


        // add top-level index elements if needed
        if (usePartitionFilter)
        {
            for (ColumnDef cdef : getIndexes())
            {
                ResourceFieldSchema idxSchema = new ResourceFieldSchema();
                idxSchema.setName("index_" + new String(cdef.getName()));
                AbstractType validator = validators.get(cdef.name);
                if (validator == null)
                    validator = marshallers.get(1);
                idxSchema.setType(getPigType(validator));
                allSchemaFields.add(idxSchema);
            }

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            }
        }


        private AbstractType<?> getTypeAndRemove(Map<ColumnIdentifier, AbstractType> columns, ColumnIdentifier t) throws InvalidRequestException, ConfigurationException
        {
            AbstractType type = columns.get(t);
            if (type == null)
                throw new InvalidRequestException(String.format("Unkown definition %s referenced in PRIMARY KEY", t));
            columns.remove(t);
            Boolean isReversed = definedOrdering.get(t);
            return isReversed != null && isReversed ? ReversedType.getInstance(type) : type;

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        return cf;
    }


    public static CFMetaData inflate(org.apache.cassandra.avro.CfDef cf)
    {
        AbstractType comparator;
        AbstractType subcolumnComparator = null;
        AbstractType validator;
        try
        {
            comparator = DatabaseDescriptor.getComparator(cf.comparator_type.toString());
            if (cf.subcomparator_type != null)
                subcolumnComparator = DatabaseDescriptor.getComparator(cf.subcomparator_type.toString());

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        return idGen.getAndIncrement();
    }


    public AbstractType getValueValidator(ByteBuffer column)
    {
        AbstractType validator = defaultValidator;
        ColumnDefinition columnDefinition = column_metadata.get(column);
        if (columnDefinition != null)
            validator = columnDefinition.validator;
        return validator;
    }

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