Package com.facebook.presto.byteCode

Examples of com.facebook.presto.byteCode.CompilerContext

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            DynamicClassLoader classLoader,
            TimeZoneKey timeZoneKey)
    {
        BootstrapEntry bootstrap = BootstrapEntry.makeBootstrap(classLoader, metadata);

        ClassDefinition classDefinition = new ClassDefinition(new CompilerContext(bootstrap.getBootstrapMethod()),
                a(PUBLIC, FINAL),
                typeFromPathName("FilterAndProjectOperator_" + CLASS_ID.incrementAndGet()),
                type(AbstractFilterAndProjectOperator.class));

        // declare fields
        FieldDefinition sessionField = classDefinition.declareField(a(PRIVATE, FINAL), "session", ConnectorSession.class);

        // constructor
        classDefinition.declareConstructor(new CompilerContext(bootstrap.getBootstrapMethod()),
                a(PUBLIC),
                arg("operatorContext", OperatorContext.class),
                arg("types", type(Iterable.class, Type.class)))
                .getBody()
                .comment("super(operatorContext, types);")
                .pushThis()
                .getVariable("operatorContext")
                .getVariable("types")
                .invokeConstructor(AbstractFilterAndProjectOperator.class, OperatorContext.class, Iterable.class)
                .comment("this.session = operatorContext.getSession();")
                .pushThis()
                .getVariable("operatorContext")
                .invokeVirtual(OperatorContext.class, "getSession", ConnectorSession.class)
                .putField(sessionField)
                .ret();

        generateFilterAndProjectRowOriented(bootstrap, classDefinition, filter, projections, expressionTypes);

        //
        // filter method
        //
        generateFilterMethod(bootstrap, classDefinition, filter, expressionTypes, true, timeZoneKey);
        generateFilterMethod(bootstrap, classDefinition, filter, expressionTypes, false, timeZoneKey);

        //
        // project methods
        //
        List<Type> types = new ArrayList<>();
        int projectionIndex = 0;
        for (Expression projection : projections) {
            generateProjectMethod(bootstrap, classDefinition, "project_" + projectionIndex, projection, expressionTypes, true, timeZoneKey);
            generateProjectMethod(bootstrap, classDefinition, "project_" + projectionIndex, projection, expressionTypes, false, timeZoneKey);
            types.add(expressionTypes.get(projection));
            projectionIndex++;
        }

        //
        // toString method
        //
        classDefinition.declareMethod(new CompilerContext(bootstrap.getBootstrapMethod()), a(PUBLIC), "toString", type(String.class))
                .getBody()
                .push(toStringHelper(classDefinition.getType().getJavaClassName())
                        .add("filter", filter)
                        .add("projections", projections)
                        .toString())
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            DynamicClassLoader classLoader,
            TimeZoneKey timeZoneKey)
    {
        BootstrapEntry bootstrap = BootstrapEntry.makeBootstrap(classLoader, metadata);

        ClassDefinition classDefinition = new ClassDefinition(new CompilerContext(bootstrap.getBootstrapMethod()),
                a(PUBLIC, FINAL),
                typeFromPathName("ScanFilterAndProjectOperator_" + CLASS_ID.incrementAndGet()),
                type(AbstractScanFilterAndProjectOperator.class));

        // declare fields
        FieldDefinition sessionField = classDefinition.declareField(a(PRIVATE, FINAL), "session", ConnectorSession.class);

        // constructor
        classDefinition.declareConstructor(new CompilerContext(bootstrap.getBootstrapMethod()),
                a(PUBLIC),
                arg("operatorContext", OperatorContext.class),
                arg("sourceId", PlanNodeId.class),
                arg("dataStreamProvider", DataStreamProvider.class),
                arg("columns", type(Iterable.class, ColumnHandle.class)),
                arg("types", type(Iterable.class, Type.class)))
                .getBody()
                .comment("super(operatorContext, sourceId, dataStreamProvider, columns, types);")
                .pushThis()
                .getVariable("operatorContext")
                .getVariable("sourceId")
                .getVariable("dataStreamProvider")
                .getVariable("columns")
                .getVariable("types")
                .invokeConstructor(AbstractScanFilterAndProjectOperator.class, OperatorContext.class, PlanNodeId.class, DataStreamProvider.class, Iterable.class, Iterable.class)
                .comment("this.session = operatorContext.getSession();")
                .pushThis()
                .getVariable("operatorContext")
                .invokeVirtual(OperatorContext.class, "getSession", ConnectorSession.class)
                .putField(sessionField)
                .ret();

        generateFilterAndProjectRowOriented(bootstrap, classDefinition, filter, projections, expressionTypes);
        generateFilterAndProjectCursorMethod(bootstrap, classDefinition, projections);

        //
        // filter method
        //
        generateFilterMethod(bootstrap, classDefinition, filter, expressionTypes, true, timeZoneKey);
        generateFilterMethod(bootstrap, classDefinition, filter, expressionTypes, false, timeZoneKey);

        //
        // project methods
        //
        List<Type> types = new ArrayList<>();
        int projectionIndex = 0;
        for (Expression projection : projections) {
            generateProjectMethod(bootstrap, classDefinition, "project_" + projectionIndex, projection, expressionTypes, true, timeZoneKey);
            generateProjectMethod(bootstrap, classDefinition, "project_" + projectionIndex, projection, expressionTypes, false, timeZoneKey);
            types.add(expressionTypes.get(projection));
            projectionIndex++;
        }

        //
        // toString method
        //
        classDefinition.declareMethod(new CompilerContext(bootstrap.getBootstrapMethod()), a(PUBLIC), "toString", type(String.class))
                .getBody()
                .push(toStringHelper(classDefinition.getType().getJavaClassName())
                        .add("filter", filter)
                        .add("projections", projections)
                        .toString())
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            ClassDefinition classDefinition,
            Expression filter,
            List<Expression> projections,
            IdentityHashMap<Expression, Type> expressionTypes)
    {
        MethodDefinition filterAndProjectMethod = classDefinition.declareMethod(new CompilerContext(bootstrap.getBootstrapMethod()),
                a(PUBLIC),
                "filterAndProjectRowOriented",
                type(void.class),
                arg("page", com.facebook.presto.operator.Page.class),
                arg("pageBuilder", PageBuilder.class));

        CompilerContext compilerContext = filterAndProjectMethod.getCompilerContext();

        LocalVariableDefinition positionVariable = compilerContext.declareVariable(int.class, "position");

        LocalVariableDefinition rowsVariable = compilerContext.declareVariable(int.class, "rows");
        filterAndProjectMethod.getBody()
                .comment("int rows = page.getPositionCount();")
                .getVariable("page")
                .invokeVirtual(com.facebook.presto.operator.Page.class, "getPositionCount", int.class)
                .putVariable(rowsVariable);

        List<LocalVariableDefinition> cursorVariables = new ArrayList<>();

        List<Integer> allInputChannels = getInputChannels(Iterables.concat(projections, ImmutableList.of(filter)));
        for (int channel : allInputChannels) {
            LocalVariableDefinition cursorVariable = compilerContext.declareVariable(BlockCursor.class, "cursor_" + channel);
            cursorVariables.add(cursorVariable);
            filterAndProjectMethod.getBody()
                    .comment("BlockCursor %s = page.getBlock(%s).cursor();", cursorVariable.getName(), channel)
                    .getVariable("page")
                    .push(channel)
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        filterAndProjectMethod.getBody().ret();
    }

    private void generateFilterAndProjectCursorMethod(BootstrapEntry bootstrap, ClassDefinition classDefinition, List<Expression> projections)
    {
        MethodDefinition filterAndProjectMethod = classDefinition.declareMethod(new CompilerContext(bootstrap.getBootstrapMethod()),
                a(PUBLIC),
                "filterAndProjectRowOriented",
                type(int.class),
                arg("cursor", RecordCursor.class),
                arg("pageBuilder", PageBuilder.class));

        CompilerContext compilerContext = filterAndProjectMethod.getCompilerContext();

        LocalVariableDefinition completedPositionsVariable = compilerContext.declareVariable(int.class, "completedPositions");
        filterAndProjectMethod.getBody()
                .comment("int completedPositions = 0;")
                .putVariable(completedPositionsVariable, 0);

        //
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            boolean sourceIsCursor,
            TimeZoneKey timeZoneKey)
    {
        MethodDefinition filterMethod;
        if (sourceIsCursor) {
            filterMethod = classDefinition.declareMethod(new CompilerContext(bootstrap.getBootstrapMethod()),
                    a(PUBLIC),
                    "filter",
                    type(boolean.class),
                    arg("cursor", RecordCursor.class));
        }
        else {
            filterMethod = classDefinition.declareMethod(new CompilerContext(bootstrap.getBootstrapMethod()),
                    a(PUBLIC),
                    "filter",
                    type(boolean.class),
                    toBlockCursorParameters(getInputChannels(filter)));
        }
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            boolean sourceIsCursor,
            TimeZoneKey timeZoneKey)
    {
        MethodDefinition projectionMethod;
        if (sourceIsCursor) {
            projectionMethod = classDefinition.declareMethod(new CompilerContext(bootstrap.getBootstrapMethod()),
                    a(PUBLIC),
                    methodName,
                    type(void.class),
                    arg("cursor", RecordCursor.class),
                    arg("output", BlockBuilder.class));
        }
        else {
            ImmutableList.Builder<NamedParameterDefinition> parameters = ImmutableList.builder();
            parameters.addAll(toBlockCursorParameters(getInputChannels(projection)));
            parameters.add(arg("output", BlockBuilder.class));

            projectionMethod = classDefinition.declareMethod(new CompilerContext(bootstrap.getBootstrapMethod()),
                    a(PUBLIC),
                    methodName,
                    type(void.class),
                    parameters.build());
        }

        projectionMethod.comment("Projection: %s", projection.toString());

        // generate body code
        CompilerContext context = projectionMethod.getCompilerContext();
        context.declareVariable(type(boolean.class), "wasNull");
        Block getSessionByteCode = new Block(context).pushThis().getField(classDefinition.getType(), "session", type(ConnectorSession.class));
        ByteCodeExpressionVisitor visitor = new ByteCodeExpressionVisitor(metadata, bootstrap.getFunctionBinder(), expressionTypes, getSessionByteCode, sourceIsCursor, timeZoneKey);
        ByteCodeNode body = visitor.process(projection, context);

        projectionMethod
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                .retInt();
    }

    private void generateAppendToMethod(ClassDefinition classDefinition, CallSiteBinder callSiteBinder, List<Type> types, List<FieldDefinition> channelFields)
    {
        CompilerContext compilerContext = new CompilerContext(BOOTSTRAP_METHOD);
        Block appendToBody = classDefinition.declareMethod(compilerContext,
                a(PUBLIC),
                "appendTo",
                type(void.class),
                arg("blockIndex", int.class),
                arg("blockPosition", int.class),
                arg("pageBuilder", PageBuilder.class),
                arg("outputChannelOffset", int.class))
                .getBody();

        for (int index = 0; index < channelFields.size(); index++) {
            Type type = types.get(index);
            ByteCodeExpression typeExpression = constantType(compilerContext, callSiteBinder, type);

            ByteCodeExpression block = compilerContext
                    .getVariable("this")
                    .getField(channelFields.get(index))
                    .invoke("get", Object.class, compilerContext.getVariable("blockIndex"))
                    .cast(com.facebook.presto.spi.block.Block.class);

            appendToBody
                    .comment("%s.appendTo(channel_%s.get(blockIndex), blockPosition, pageBuilder.getBlockBuilder(outputChannelOffset + %s));", type.getClass(), index, index)
                    .append(typeExpression)
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        appendToBody.ret();
    }

    private void generateHashPositionMethod(ClassDefinition classDefinition, CallSiteBinder callSiteBinder, List<Type> joinChannelTypes, List<FieldDefinition> joinChannelFields)
    {
        CompilerContext compilerContext = new CompilerContext(BOOTSTRAP_METHOD);
        MethodDefinition hashPositionMethod = classDefinition.declareMethod(compilerContext,
                a(PUBLIC),
                "hashPosition",
                type(int.class),
                arg("blockIndex", int.class),
                arg("blockPosition", int.class));

        Variable resultVariable = hashPositionMethod.getCompilerContext().declareVariable(int.class, "result");
        hashPositionMethod.getBody().push(0).putVariable(resultVariable);

        for (int index = 0; index < joinChannelTypes.size(); index++) {
            ByteCodeExpression type = constantType(compilerContext, callSiteBinder, joinChannelTypes.get(index));

            ByteCodeExpression block = compilerContext
                    .getVariable("this")
                    .getField(joinChannelFields.get(index))
                    .invoke("get", Object.class, compilerContext.getVariable("blockIndex"))
                    .cast(com.facebook.presto.spi.block.Block.class);

            hashPositionMethod
                    .getBody()
                    .getVariable(resultVariable)
                    .push(31)
                    .append(OpCodes.IMUL)
                    .append(typeHashCode(compilerContext, type, block, compilerContext.getVariable("blockPosition")))
                    .append(OpCodes.IADD)
                    .putVariable(resultVariable);
        }

        hashPositionMethod
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                .retInt();
    }

    private void generateHashRowMethod(ClassDefinition classDefinition, CallSiteBinder callSiteBinder, List<Type> joinChannelTypes, List<FieldDefinition> joinChannelFields)
    {
        CompilerContext compilerContext = new CompilerContext(BOOTSTRAP_METHOD);
        MethodDefinition hashPositionMethod = classDefinition.declareMethod(compilerContext,
                a(PUBLIC),
                "hashRow",
                type(int.class),
                arg("position", int.class),
                arg("blocks", com.facebook.presto.spi.block.Block[].class));

        Variable resultVariable = hashPositionMethod.getCompilerContext().declareVariable(int.class, "result");
        hashPositionMethod.getBody().push(0).putVariable(resultVariable);

        for (int index = 0; index < joinChannelTypes.size(); index++) {
            ByteCodeExpression type = constantType(compilerContext, callSiteBinder, joinChannelTypes.get(index));

            ByteCodeExpression block = compilerContext
                    .getVariable("blocks")
                    .getElement(index)
                    .cast(com.facebook.presto.spi.block.Block.class);

            hashPositionMethod
                    .getBody()
                    .getVariable(resultVariable)
                    .push(31)
                    .append(OpCodes.IMUL)
                    .append(typeHashCode(compilerContext, type, block, compilerContext.getVariable("position")))
                    .append(OpCodes.IADD)
                    .putVariable(resultVariable);
        }

        hashPositionMethod
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            ClassDefinition classDefinition,
            CallSiteBinder callSiteBinder,
            List<Type> joinChannelTypes,
            List<FieldDefinition> joinChannelFields)
    {
        CompilerContext compilerContext = new CompilerContext(BOOTSTRAP_METHOD);
        MethodDefinition hashPositionMethod = classDefinition.declareMethod(compilerContext,
                a(PUBLIC),
                "positionEqualsRow",
                type(boolean.class),
                arg("leftBlockIndex", int.class),
                arg("leftBlockPosition", int.class),
                arg("rightPosition", int.class),
                arg("rightBlocks", com.facebook.presto.spi.block.Block[].class));

        for (int index = 0; index < joinChannelTypes.size(); index++) {
            ByteCodeExpression type = constantType(compilerContext, callSiteBinder, joinChannelTypes.get(index));

            ByteCodeExpression leftBlock = compilerContext
                    .getVariable("this")
                    .getField(joinChannelFields.get(index))
                    .invoke("get", Object.class, compilerContext.getVariable("leftBlockIndex"))
                    .cast(com.facebook.presto.spi.block.Block.class);

            ByteCodeExpression rightBlock = compilerContext
                    .getVariable("rightBlocks")
                    .getElement(index);

            LabelNode checkNextField = new LabelNode("checkNextField");
            hashPositionMethod
                    .getBody()
                    .append(typeEquals(compilerContext,
                            type,
                            leftBlock,
                            compilerContext.getVariable("leftBlockPosition"),
                            rightBlock,
                            compilerContext.getVariable("rightPosition")))
                    .ifTrueGoto(checkNextField)
                    .push(false)
                    .retBoolean()
                    .visitLabel(checkNextField);
        }
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