Examples with Slices.utf8Slice io.airlift.slice.Slices.utf8Slice used on opensource projects

Example 1 with Slices.utf8Slice

use of io.airlift.slice.Slices.utf8Slice in project presto by prestodb.

the class LiteralInterpreter method toExpression.

public static Expression toExpression(Object object, Type type) {
    requireNonNull(type, "type is null");
    if (object instanceof Expression) {
        return (Expression) object;
    }
    if (object == null) {
        if (type.equals(UNKNOWN)) {
            return new NullLiteral();
        }
        return new Cast(new NullLiteral(), type.getTypeSignature().toString(), false, true);
    }
    if (type.equals(INTEGER)) {
        return new LongLiteral(object.toString());
    }
    if (type.equals(BIGINT)) {
        LongLiteral expression = new LongLiteral(object.toString());
        if (expression.getValue() >= Integer.MIN_VALUE && expression.getValue() <= Integer.MAX_VALUE) {
            return new GenericLiteral("BIGINT", object.toString());
        }
        return new LongLiteral(object.toString());
    }
    checkArgument(Primitives.wrap(type.getJavaType()).isInstance(object), "object.getClass (%s) and type.getJavaType (%s) do not agree", object.getClass(), type.getJavaType());
    if (type.equals(DOUBLE)) {
        Double value = (Double) object;
        // When changing this, don't forget about similar code for REAL below
        if (value.isNaN()) {
            return new FunctionCall(QualifiedName.of("nan"), ImmutableList.of());
        } else if (value.equals(Double.NEGATIVE_INFINITY)) {
            return ArithmeticUnaryExpression.negative(new FunctionCall(QualifiedName.of("infinity"), ImmutableList.of()));
        } else if (value.equals(Double.POSITIVE_INFINITY)) {
            return new FunctionCall(QualifiedName.of("infinity"), ImmutableList.of());
        } else {
            return new DoubleLiteral(object.toString());
        }
    }
    if (type.equals(REAL)) {
        Float value = intBitsToFloat(((Long) object).intValue());
        // WARNING for ORC predicate code as above (for double)
        if (value.isNaN()) {
            return new Cast(new FunctionCall(QualifiedName.of("nan"), ImmutableList.of()), StandardTypes.REAL);
        } else if (value.equals(Float.NEGATIVE_INFINITY)) {
            return ArithmeticUnaryExpression.negative(new Cast(new FunctionCall(QualifiedName.of("infinity"), ImmutableList.of()), StandardTypes.REAL));
        } else if (value.equals(Float.POSITIVE_INFINITY)) {
            return new Cast(new FunctionCall(QualifiedName.of("infinity"), ImmutableList.of()), StandardTypes.REAL);
        } else {
            return new GenericLiteral("REAL", value.toString());
        }
    }
    if (type instanceof VarcharType) {
        if (object instanceof String) {
            object = Slices.utf8Slice((String) object);
        }
        if (object instanceof Slice) {
            Slice value = (Slice) object;
            int length = SliceUtf8.countCodePoints(value);
            if (length == ((VarcharType) type).getLength()) {
                return new StringLiteral(value.toStringUtf8());
            }
            return new Cast(new StringLiteral(value.toStringUtf8()), type.getDisplayName(), false, true);
        }
        throw new IllegalArgumentException("object must be instance of Slice or String when type is VARCHAR");
    }
    if (type.equals(BOOLEAN)) {
        return new BooleanLiteral(object.toString());
    }
    if (object instanceof Block) {
        SliceOutput output = new DynamicSliceOutput(((Block) object).getSizeInBytes());
        BlockSerdeUtil.writeBlock(output, (Block) object);
        object = output.slice();
    // This if condition will evaluate to true: object instanceof Slice && !type.equals(VARCHAR)
    }
    if (object instanceof Slice) {
        // HACK: we need to serialize VARBINARY in a format that can be embedded in an expression to be
        // able to encode it in the plan that gets sent to workers.
        // We do this by transforming the in-memory varbinary into a call to from_base64(<base64-encoded value>)
        FunctionCall fromBase64 = new FunctionCall(QualifiedName.of("from_base64"), ImmutableList.of(new StringLiteral(VarbinaryFunctions.toBase64((Slice) object).toStringUtf8())));
        Signature signature = FunctionRegistry.getMagicLiteralFunctionSignature(type);
        return new FunctionCall(QualifiedName.of(signature.getName()), ImmutableList.of(fromBase64));
    }
    Signature signature = FunctionRegistry.getMagicLiteralFunctionSignature(type);
    Expression rawLiteral = toExpression(object, FunctionRegistry.typeForMagicLiteral(type));
    return new FunctionCall(QualifiedName.of(signature.getName()), ImmutableList.of(rawLiteral));
}