com.google.cloud.bigtable.hbase.adapters.read

Class ReaderExpressionHelper

java.lang.Object

com.google.cloud.bigtable.hbase.adapters.read.ReaderExpressionHelper

@InternalApi(value="For internal usage only")
public class ReaderExpressionHelper
extends Object

Methods and constants to help build a bigtable reader expression // TODO(AngusDavis): Move more ScanAdapter and FilterAdapter writing logic to here.

For internal use only - public for technical reasons.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ReaderExpressionHelper.QuoteFilterExpressionStream An OutputStream that performs bigtable reader filter expression language quoting of '@', '{', and '}' by pre-pending a '@' to each.
static class	ReaderExpressionHelper.QuoteMetaOutputStream An OutputStream that performs RE2:QuoteMeta as bytes are written.

Field Summary

Fields

Modifier and Type	Field and Description
static byte[]	ALL_BYTE_BYTES Constant ANY_BYTE_BYTES=Bytes.toBytes(ANY_BYTE)
static String	ALL_BYTES Constant ALL_BYTES="\\C*"
static byte[]	ALL_QUALIFIERS_BYTES Constant ALL_QUALIFIERS_BYTES=Bytes.toBytes(ALL_QUALIFIERS)
static String	ANY_BYTE Constant ANY_BYTE="\\C"
static byte[]	ANY_BYTE_BYTES Constant ANY_BYTE_BYTES=Bytes.toBytes(ANY_BYTE)
static String	ANY_BYTES Constant ANY_BYTES="\\C+"

Constructor Summary

Constructors

Constructor and Description
ReaderExpressionHelper()

Method Summary

Modifier and Type	Method and Description
static com.google.protobuf.ByteString	quoteRegularExpression(byte[] unquoted) quoteRegularExpression.
static void	writeQuotedExpression(OutputStream outputStream, byte[] unquoted) Write unquoted to the OutputStream applying both RE2:QuoteMeta and Bigtable reader expression quoting.
static void	writeQuotedRegularExpression(OutputStream outputStream, byte[] unquoted) Write unquoted to the OutputStream applying RE2:QuoteMeta quoting.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ANY_BYTE

public static final String ANY_BYTE

Constant ANY_BYTE="\\C"

See Also:

Constant Field Values

ANY_BYTES

public static final String ANY_BYTES

Constant ANY_BYTES="\\C+"

See Also:

Constant Field Values

ALL_BYTES

public static final String ALL_BYTES

Constant ALL_BYTES="\\C*"

See Also:

Constant Field Values

ANY_BYTE_BYTES

public static final byte[] ANY_BYTE_BYTES

Constant ANY_BYTE_BYTES=Bytes.toBytes(ANY_BYTE)

ALL_BYTE_BYTES

public static final byte[] ALL_BYTE_BYTES

Constant ANY_BYTE_BYTES=Bytes.toBytes(ANY_BYTE)

ALL_QUALIFIERS_BYTES

public static final byte[] ALL_QUALIFIERS_BYTES

Constant ALL_QUALIFIERS_BYTES=Bytes.toBytes(ALL_QUALIFIERS)

Constructor Detail

ReaderExpressionHelper

public ReaderExpressionHelper()

Method Detail

writeQuotedExpression

public static void writeQuotedExpression(OutputStream outputStream,
                                         byte[] unquoted)
                                  throws IOException

Write unquoted to the OutputStream applying both RE2:QuoteMeta and Bigtable reader expression quoting.

Parameters:

outputStream - A stream to write quoted output to

unquoted - A byte-array, possibly containing bytes outside of the ASCII

Throws:

IOException - if any.

quoteRegularExpression

public static com.google.protobuf.ByteString quoteRegularExpression(byte[] unquoted)
                                                             throws IOException

quoteRegularExpression.

Parameters:

unquoted - an array of byte.

Returns:

an array of byte.

Throws:

IOException - if any.

writeQuotedRegularExpression

public static void writeQuotedRegularExpression(OutputStream outputStream,
                                                byte[] unquoted)
                                         throws IOException

Write unquoted to the OutputStream applying RE2:QuoteMeta quoting.

Parameters:

outputStream - a OutputStream object.

unquoted - an array of byte.

Throws:

IOException - if any.