Package com.facebook.presto.byteCode

Examples of com.facebook.presto.byteCode.Block.comment()

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                .pushThis()
                .getVariable("page")
                .invokeVirtual(Page.class, "getPositionCount", int.class)
                .putField(positionCountField);

        constructor.comment("Set block fields");
        for (int index = 0; index < blockFields.size(); index++) {
            constructor
                    .pushThis()
                    .getVariable("page")
                    .push(index)
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                    .push(index)
                    .invokeVirtual(Page.class, "getBlock", com.facebook.presto.spi.block.Block.class, int.class)
                    .putField(blockFields.get(index));
        }

        constructor.comment("Set probe channel fields");
        for (int index = 0; index < probeChannelFields.size(); index++) {
            constructor
                    .pushThis()
                    .pushThis()
                    .getField(blockFields.get(probeChannels.get(index)))
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                    .pushThis()
                    .getField(blockFields.get(probeChannels.get(index)))
                    .putField(probeChannelFields.get(index));
        }

        constructor.comment("this.probeBlocks = new Block[<probeChannelCount>];");
        constructor
                .pushThis()
                .push(probeChannelFields.size())
                .newArray(com.facebook.presto.spi.block.Block.class)
                .putField(probeBlocksArrayField);
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                    .pushThis()
                    .getField(probeChannelFields.get(index))
                    .putObjectArrayElement();
        }

        constructor
                .comment("this.position = -1;")
                .pushThis()
                .push(-1)
                .putField(positionField);
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                type(void.class),
                arg("pageBuilder", PageBuilder.class))
                .getBody();

        for (int index = 0; index < blockFields.size(); index++) {
            appendToBody
                    .comment("block_%s.appendTo(position, pageBuilder.getBlockBuilder(%s));", index, index)
                    .pushThis()
                    .getField(blockFields.get(index))
                    .pushThis()
                    .getField(positionField)
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                a(PUBLIC),
                "advanceNextPosition",
                type(boolean.class))
                .getBody();

        advanceNextPositionBody
                .comment("this.position = this.position + 1;")
                .pushThis()
                .pushThis()
                .getField(positionField)
                .push(1)
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                .intAdd()
                .putField(positionField);

        LabelNode lessThan = new LabelNode("lessThan");
        LabelNode end = new LabelNode("end");
        advanceNextPositionBody
                .comment("return position < positionCount;")
                .pushThis()
                .getField(positionField)
                .pushThis()
                .getField(positionCountField)
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        Block forLoopBody = new Block(compilerContext);

        // cursor.advanceNextPosition()
        for (LocalVariableDefinition cursorVariable : cursorVariables) {
            forLoopBody
                    .comment("checkState(%s.advanceNextPosition());", cursorVariable.getName())
                    .getVariable(cursorVariable)
                    .invokeInterface(BlockCursor.class, "advanceNextPosition", boolean.class)
                    .invokeStatic(Preconditions.class, "checkState", void.class, boolean.class);
        }
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        condition.invokeVirtual(classDefinition.getType(), "filter", type(boolean.class), nCopies(channels, type(BlockCursor.class)));
        ifStatement.condition(condition);

        Block trueBlock = new Block(compilerContext);
        if (projections.isEmpty()) {
            trueBlock
                    .comment("pageBuilder.declarePosition()")
                    .getVariable("pageBuilder")
                    .invokeVirtual(PageBuilder.class, "declarePosition", void.class);
        }
        else {
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                    .invokeVirtual(PageBuilder.class, "declarePosition", void.class);
        }
        else {
            // pageBuilder.getBlockBuilder(0).append(cursor.getDouble(0);
            for (int projectionIndex = 0; projectionIndex < projections.size(); projectionIndex++) {
                trueBlock.comment("project_%s(cursors..., pageBuilder.getBlockBuilder(%s))", projectionIndex, projectionIndex);
                trueBlock.pushThis();
                for (int channel = 0; channel < channels; channel++) {
                    trueBlock.getVariable("cursor_" + channel);
                }
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