Examples with IfStatement com.facebook.presto.bytecode.control.IfStatement used on opensource projects

Example 76 with IfStatement

use of com.facebook.presto.bytecode.control.IfStatement in project presto by prestodb.

the class JoinCompiler method generateHashPositionMethod.

private static void generateHashPositionMethod(ClassDefinition classDefinition, CallSiteBinder callSiteBinder, List<Type> joinChannelTypes, List<FieldDefinition> joinChannelFields, FieldDefinition hashChannelField) {
    Parameter blockIndex = arg("blockIndex", int.class);
    Parameter blockPosition = arg("blockPosition", int.class);
    MethodDefinition hashPositionMethod = classDefinition.declareMethod(a(PUBLIC), "hashPosition", type(long.class), blockIndex, blockPosition);
    Variable thisVariable = hashPositionMethod.getThis();
    BytecodeExpression hashChannel = thisVariable.getField(hashChannelField);
    BytecodeExpression bigintType = constantType(callSiteBinder, BigintType.BIGINT);
    IfStatement ifStatement = new IfStatement();
    ifStatement.condition(notEqual(hashChannel, constantNull(hashChannelField.getType())));
    ifStatement.ifTrue(bigintType.invoke("getLong", long.class, hashChannel.invoke("get", Object.class, blockIndex).cast(Block.class), blockPosition).ret());
    hashPositionMethod.getBody().append(ifStatement);
    Variable resultVariable = hashPositionMethod.getScope().declareVariable(long.class, "result");
    hashPositionMethod.getBody().push(0L).putVariable(resultVariable);
    for (int index = 0; index < joinChannelTypes.size(); index++) {
        BytecodeExpression type = constantType(callSiteBinder, joinChannelTypes.get(index));
        BytecodeExpression block = hashPositionMethod.getThis().getField(joinChannelFields.get(index)).invoke("get", Object.class, blockIndex).cast(Block.class);
        hashPositionMethod.getBody().getVariable(resultVariable).push(31L).append(OpCode.LMUL).append(typeHashCode(type, block, blockPosition)).append(OpCode.LADD).putVariable(resultVariable);
    }
    hashPositionMethod.getBody().getVariable(resultVariable).retLong();
}

Example 77 with IfStatement

use of com.facebook.presto.bytecode.control.IfStatement in project presto by prestodb.

the class StateCompiler method generateSerialize.

private static <T> void generateSerialize(ClassDefinition definition, CallSiteBinder binder, Class<T> clazz, List<StateField> fields) {
    Parameter state = arg("state", Object.class);
    Parameter out = arg("out", BlockBuilder.class);
    MethodDefinition method = definition.declareMethod(a(PUBLIC), "serialize", type(void.class), state, out);
    Scope scope = method.getScope();
    BytecodeBlock serializerBody = method.getBody();
    if (fields.size() == 0) {
        serializerBody.append(out.invoke("appendNull", BlockBuilder.class).pop());
    } else if (fields.size() == 1) {
        Method getter = getGetter(clazz, getOnlyElement(fields));
        SqlTypeBytecodeExpression sqlType = constantType(binder, getOnlyElement(fields).getSqlType());
        Variable fieldValue = scope.declareVariable(getter.getReturnType(), "value");
        serializerBody.append(fieldValue.set(state.cast(getter.getDeclaringClass()).invoke(getter)));
        if (!getOnlyElement(fields).isPrimitiveType()) {
            serializerBody.append(new IfStatement().condition(equal(fieldValue, constantNull(getter.getReturnType()))).ifTrue(out.invoke("appendNull", BlockBuilder.class).pop()).ifFalse(sqlType.writeValue(out, fieldValue)));
        } else {
            // For primitive type, we need to cast here because we serialize byte fields with TINYINT/INTEGER (whose java type is long).
            serializerBody.append(sqlType.writeValue(out, fieldValue.cast(getOnlyElement(fields).getSqlType().getJavaType())));
        }
    } else if (fields.size() > 1) {
        Variable rowBuilder = scope.declareVariable(BlockBuilder.class, "rowBuilder");
        serializerBody.append(rowBuilder.set(out.invoke("beginBlockEntry", BlockBuilder.class)));
        for (StateField field : fields) {
            Method getter = getGetter(clazz, field);
            SqlTypeBytecodeExpression sqlType = constantType(binder, field.getSqlType());
            Variable fieldValue = scope.createTempVariable(getter.getReturnType());
            serializerBody.append(fieldValue.set(state.cast(getter.getDeclaringClass()).invoke(getter)));
            if (!field.isPrimitiveType()) {
                serializerBody.append(new IfStatement().condition(equal(fieldValue, constantNull(getter.getReturnType()))).ifTrue(rowBuilder.invoke("appendNull", BlockBuilder.class).pop()).ifFalse(sqlType.writeValue(rowBuilder, fieldValue)));
            } else {
                // For primitive type, we need to cast here because we serialize byte fields with TINYINT/INTEGER (whose java type is long).
                serializerBody.append(sqlType.writeValue(rowBuilder, fieldValue.cast(field.getSqlType().getJavaType())));
            }
        }
        serializerBody.append(out.invoke("closeEntry", BlockBuilder.class).pop());
    }
    serializerBody.ret();
}