Package com.facebook.presto.byteCode

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

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        Block getEstimatedSize = definition.declareMethod(new CompilerContext(null), a(PUBLIC), "getEstimatedSize", type(long.class))
                .getBody()
                .comment("long size = 0;")
                .push(0L);
        for (FieldDefinition field : fieldDefinitions) {
            getEstimatedSize
                    .comment("size += %s.sizeOf();", field.getName())
                    .pushThis()
                    .getField(field)
                    .invokeVirtual(field.getType(), "sizeOf", type(long.class))
                    .longAdd();
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                    .pushThis()
                    .getField(field)
                    .invokeVirtual(field.getType(), "sizeOf", type(long.class))
                    .longAdd();
        }
        getEstimatedSize.comment("return size;");
        getEstimatedSize.retLong();

        return defineClass(definition, clazz, classLoader);
    }
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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(TupleReadable.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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                );

        Block forLoopBody = new Block(compilerContext);
        forLoop.body(forLoopBody);

        forLoopBody.comment("if (pageBuilder.isFull()) break;")
                .append(new Block(compilerContext)
                        .getVariable("pageBuilder")
                        .invokeVirtual(PageBuilder.class, "isFull", boolean.class)
                        .ifTrueGoto(done));
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                .append(new Block(compilerContext)
                        .getVariable("pageBuilder")
                        .invokeVirtual(PageBuilder.class, "isFull", boolean.class)
                        .ifTrueGoto(done));

        forLoopBody.comment("if (!cursor.advanceNextPosition()) break;")
                .append(new Block(compilerContext)
                        .getVariable("cursor")
                        .invokeInterface(RecordCursor.class, "advanceNextPosition", boolean.class)
                        .ifFalseGoto(done));
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                    .getVariable("output")
                    .append(body.getNode());

            Block notNullBlock = new Block(context);
            if (body.getType() == boolean.class) {
                notNullBlock
                        .comment("output.append(<booleanStackValue>);")
                        .invokeVirtual(BlockBuilder.class, "append", BlockBuilder.class, boolean.class)
                        .pop();
            }
            else if (body.getType() == long.class) {
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                        .comment("output.append(<booleanStackValue>);")
                        .invokeVirtual(BlockBuilder.class, "append", BlockBuilder.class, boolean.class)
                        .pop();
            }
            else if (body.getType() == long.class) {
                notNullBlock
                        .comment("output.append(<longStackValue>);")
                        .invokeVirtual(BlockBuilder.class, "append", BlockBuilder.class, long.class)
                        .pop();
            }
            else if (body.getType() == double.class) {
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                        .comment("output.append(<longStackValue>);")
                        .invokeVirtual(BlockBuilder.class, "append", BlockBuilder.class, long.class)
                        .pop();
            }
            else if (body.getType() == double.class) {
                notNullBlock
                        .comment("output.append(<doubleStackValue>);")
                        .invokeVirtual(BlockBuilder.class, "append", BlockBuilder.class, double.class)
                        .pop();
            }
            else if (body.getType() == Slice.class) {
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