Examples with RowExpressionVisitor com.facebook.presto.spi.relation.RowExpressionVisitor used on opensource projects

Example 1 with RowExpressionVisitor

use of com.facebook.presto.spi.relation.RowExpressionVisitor in project presto by prestodb.

the class CursorProcessorCompiler method fieldReferenceCompiler.

static RowExpressionVisitor<BytecodeNode, Scope> fieldReferenceCompiler(Map<VariableReferenceExpression, CommonSubExpressionFields> variableMap) {
    return new RowExpressionVisitor<BytecodeNode, Scope>() {

        @Override
        public BytecodeNode visitInputReference(InputReferenceExpression node, Scope scope) {
            int field = node.getField();
            Type type = node.getType();
            Variable wasNullVariable = scope.getVariable("wasNull");
            Variable cursorVariable = scope.getVariable("cursor");
            Class<?> javaType = type.getJavaType();
            if (!javaType.isPrimitive() && javaType != Slice.class) {
                javaType = Object.class;
            }
            IfStatement ifStatement = new IfStatement();
            ifStatement.condition().setDescription(format("cursor.get%s(%d)", type, field)).getVariable(cursorVariable).push(field).invokeInterface(RecordCursor.class, "isNull", boolean.class, int.class);
            ifStatement.ifTrue().putVariable(wasNullVariable, true).pushJavaDefault(javaType);
            ifStatement.ifFalse().getVariable(cursorVariable).push(field).invokeInterface(RecordCursor.class, "get" + Primitives.wrap(javaType).getSimpleName(), javaType, int.class);
            return ifStatement;
        }

        @Override
        public BytecodeNode visitCall(CallExpression call, Scope scope) {
            throw new UnsupportedOperationException("not yet implemented");
        }

        @Override
        public BytecodeNode visitConstant(ConstantExpression literal, Scope scope) {
            throw new UnsupportedOperationException("not yet implemented");
        }

        @Override
        public BytecodeNode visitLambda(LambdaDefinitionExpression lambda, Scope context) {
            throw new UnsupportedOperationException();
        }

        @Override
        public BytecodeNode visitVariableReference(VariableReferenceExpression reference, Scope context) {
            CommonSubExpressionFields fields = variableMap.get(reference);
            return new BytecodeBlock().append(context.getThis().invoke(fields.getMethodName(), fields.getResultType(), context.getVariable("properties"), context.getVariable("cursor"))).append(unboxPrimitiveIfNecessary(context, Primitives.wrap(reference.getType().getJavaType())));
        }

        @Override
        public BytecodeNode visitSpecialForm(SpecialFormExpression specialForm, Scope context) {
            throw new UnsupportedOperationException();
        }
    };
}

Example 2 with RowExpressionVisitor

use of com.facebook.presto.spi.relation.RowExpressionVisitor in project presto by prestodb.

the class LambdaBytecodeGenerator method variableReferenceCompiler.

private static RowExpressionVisitor<BytecodeNode, Scope> variableReferenceCompiler(Map<String, ParameterAndType> parameterMap) {
    return new RowExpressionVisitor<BytecodeNode, Scope>() {

        @Override
        public BytecodeNode visitInputReference(InputReferenceExpression node, Scope scope) {
            throw new UnsupportedOperationException();
        }

        @Override
        public BytecodeNode visitCall(CallExpression call, Scope scope) {
            throw new UnsupportedOperationException();
        }

        @Override
        public BytecodeNode visitConstant(ConstantExpression literal, Scope scope) {
            throw new UnsupportedOperationException();
        }

        @Override
        public BytecodeNode visitLambda(LambdaDefinitionExpression lambda, Scope context) {
            throw new UnsupportedOperationException();
        }

        @Override
        public BytecodeNode visitVariableReference(VariableReferenceExpression reference, Scope context) {
            ParameterAndType parameterAndType = parameterMap.get(reference.getName());
            Parameter parameter = parameterAndType.getParameter();
            Class<?> type = parameterAndType.getType();
            return new BytecodeBlock().append(parameter).append(unboxPrimitiveIfNecessary(context, type));
        }

        @Override
        public BytecodeNode visitSpecialForm(SpecialFormExpression specialForm, Scope context) {
            throw new UnsupportedOperationException();
        }
    };
}