Examples of org.apache.phoenix.schema.KeyValueSchema

org.apache.phoenix.schema.KeyValueSchema
Simple flat schema over a byte array where fields may be any of {@link PDataType}. Optimized for positional access by index. @since 0.1

                serailizeArrayIndexInformationAndSetInScan(context, arrayKVFuncs, arrayKVRefs);
                KeyValueSchemaBuilder builder = new KeyValueSchemaBuilder(0);
                for (Expression expression : arrayKVRefs) {
                    builder.addField(expression);
                }
                KeyValueSchema kvSchema = builder.build();
                arrayIndexesBitSet = ValueBitSet.newInstance(kvSchema);
                builder = new KeyValueSchemaBuilder(0);
                for (Expression expression : arrayKVFuncs) {
                    builder.addField(expression);
                }

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                    KeyValueUtil.newKeyValue(ptr.get(), ptr.getOffset(), ptr.getLength(),
                        QueryConstants.SINGLE_COLUMN_FAMILY, QueryConstants.SINGLE_COLUMN,
                        QueryConstants.AGG_TIMESTAMP, data, vIntKeyLength + keyLength + vIntValLength, valueLength);
            Tuple result = new SingleKeyValueTuple(keyValue);
            TupleUtil.getAggregateValue(result, ptr);
            KeyValueSchema schema = aggregators.getValueSchema();
            ValueBitSet tempValueSet = ValueBitSet.newInstance(schema);
            tempValueSet.clear();
            tempValueSet.or(ptr);


            int i = 0, maxOffset = ptr.getOffset() + ptr.getLength();
            SingleAggregateFunction[] funcArray = aggregators.getFunctions();
            Aggregator[] sAggs = new Aggregator[funcArray.length];
            Boolean hasValue;
            schema.iterator(ptr);
            while ((hasValue = schema.next(ptr, i, maxOffset, tempValueSet)) != null) {
                SingleAggregateFunction func = funcArray[i];
                sAggs[i++] =
                        hasValue ? func.newServerAggregator(conf, ptr) : func
                                .newServerAggregator(conf);
            }

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            return null;
        }
        ByteArrayInputStream stream = new ByteArrayInputStream(proj);
        try {
            DataInputStream input = new DataInputStream(stream);
            KeyValueSchema schema = new KeyValueSchema();
            schema.readFields(input);
            int count = WritableUtils.readVInt(input);
            Expression[] expressions = new Expression[count];
            for (int i = 0; i < count; i++) {
              int ordinal = WritableUtils.readVInt(input);
              expressions[i] = ExpressionType.values()[ordinal].newInstance();

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            return null;
        }
        ByteArrayInputStream stream = new ByteArrayInputStream(join);
        try {
            DataInputStream input = new DataInputStream(stream);
            KeyValueSchema joinedSchema = new KeyValueSchema();
            joinedSchema.readFields(input);
            int count = WritableUtils.readVInt(input);
            ImmutableBytesPtr[] joinIds = new ImmutableBytesPtr[count];
            List<Expression>[] joinExpressions = new List[count];
            JoinType[] joinTypes = new JoinType[count];
            boolean[] earlyEvaluation = new boolean[count];
            KeyValueSchema[] schemas = new KeyValueSchema[count];
            int[] fieldPositions = new int[count];
            for (int i = 0; i < count; i++) {
                joinIds[i] = new ImmutableBytesPtr();
                joinIds[i].readFields(input);
                int nExprs = WritableUtils.readVInt(input);
                joinExpressions[i] = new ArrayList<Expression>(nExprs);
                for (int j = 0; j < nExprs; j++) {
                    int expressionOrdinal = WritableUtils.readVInt(input);
                    Expression expression = ExpressionType.values()[expressionOrdinal].newInstance();
                    expression.readFields(input);
                    joinExpressions[i].add(expression);
                }
                int type = WritableUtils.readVInt(input);
                joinTypes[i] = JoinType.values()[type];
                earlyEvaluation[i] = input.readBoolean();
                schemas[i] = new KeyValueSchema();
                schemas[i].readFields(input);
                fieldPositions[i] = WritableUtils.readVInt(input);
            }
            Expression postJoinFilterExpression = null;
            int expressionOrdinal = WritableUtils.readVInt(input);

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                }
                for (int i = 0; i < dup; i++) {
                    resultQueue.offer(tuple);
                }
            } else {
                KeyValueSchema schema = joinInfo.getJoinedSchema();
                if (!joinInfo.forceProjection()) {
                    tuple = projector.projectResults(tuple);
                }
                resultQueue.offer(tuple);
                for (int i = 0; i < count; i++) {

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  }


    @Override
    public void readFields(DataInput input) throws IOException {
        super.readFields(input);
        schema = new KeyValueSchema();
        schema.readFields(input);
        bitSet = ValueBitSet.newInstance(schema);
        position = input.readInt();
        displayName = input.readUTF();
    }

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            return null;
        }
        ByteArrayInputStream stream = new ByteArrayInputStream(proj);
        try {
            DataInputStream input = new DataInputStream(stream);
            KeyValueSchema schema = new KeyValueSchema();
            schema.readFields(input);
            int count = WritableUtils.readVInt(input);
            Expression[] expressions = new Expression[count];
            for (int i = 0; i < count; i++) {
              int ordinal = WritableUtils.readVInt(input);
              expressions[i] = ExpressionType.values()[ordinal].newInstance();

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                }
                for (int i = 0; i < dup; i++) {
                    resultQueue.offer(tuple);
                }
            } else {
                KeyValueSchema schema = joinInfo.getJoinedSchema();
                resultQueue.offer(projector.projectResults(tuple));
                for (int i = 0; i < count; i++) {
                    boolean earlyEvaluation = joinInfo.earlyEvaluation()[i];
                    if (earlyEvaluation && tempTuples[i] == null)
                        continue;

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        byte[] schemaBytes = scan.getAttribute(BaseScannerRegionObserver.LOCAL_INDEX_JOIN_SCHEMA);
        if (schemaBytes == null) return null;
        ByteArrayInputStream stream = new ByteArrayInputStream(schemaBytes); // TODO: size?
        try {
            DataInputStream input = new DataInputStream(stream);
            KeyValueSchema schema = new KeyValueSchema();
            schema.readFields(input);
            return schema;
        } catch (IOException e) {
            throw new RuntimeException(e);
        } finally {
            try {

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        }
    }
    
    public static TupleProjector getTupleProjector(Scan scan, ColumnReference[] dataColumns) {
        if (dataColumns != null && dataColumns.length != 0) {
            KeyValueSchema keyValueSchema = deserializeLocalIndexJoinSchemaFromScan(scan); 
            KeyValueColumnExpression[] keyValueColumns = new KeyValueColumnExpression[dataColumns.length];
            for (int i = 0; i < dataColumns.length; i++) {
                ColumnReference dataColumn = dataColumns[i];
                KeyValueColumnExpression dataColumnExpr = new KeyValueColumnExpression(keyValueSchema.getField(i), dataColumn.getFamily(), dataColumn.getQualifier());
                keyValueColumns[i] = dataColumnExpr;
            }
            return new TupleProjector(keyValueSchema, keyValueColumns);
        }
        return null;

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