org.apache.lucene.util.fst

Class ByteSequenceOutputs

java.lang.Object

org.apache.lucene.util.fst.Outputs<BytesRef>

org.apache.lucene.util.fst.ByteSequenceOutputs

public final class ByteSequenceOutputs
extends Outputs<BytesRef>

An FST Outputs implementation where each output is a sequence of bytes.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Method Summary

Methods

Modifier and Type	Method and Description
BytesRef	add(BytesRef prefix, BytesRef output) Eg add("foo", "bar") -> "foobar"
BytesRef	common(BytesRef output1, BytesRef output2) Eg common("foobar", "food") -> "foo"
BytesRef	getNoOutput() NOTE: this output is compared with == so you must ensure that all methods return the single object if it's really no output
static ByteSequenceOutputs	getSingleton()
String	outputToString(BytesRef output)
long	ramBytesUsed(BytesRef output) Return memory usage for the provided output.
BytesRef	read(DataInput in) Decode an output value previously written with Outputs.write(Object, DataOutput).
void	skipOutput(DataInput in) Skip the output; defaults to just calling Outputs.read(org.apache.lucene.store.DataInput) and discarding the result.
BytesRef	subtract(BytesRef output, BytesRef inc) Eg subtract("foobar", "foo") -> "bar"
void	write(BytesRef prefix, DataOutput out) Encode an output value into a DataOutput.

Methods inherited from class org.apache.lucene.util.fst.Outputs

merge, readFinalOutput, skipFinalOutput, writeFinalOutput

Methods inherited from class java.lang.Object

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

Method Detail

getSingleton

public static ByteSequenceOutputs getSingleton()

common

public BytesRef common(BytesRef output1,
              BytesRef output2)

Description copied from class: Outputs

Eg common("foobar", "food") -> "foo"

Specified by:

common in class Outputs<BytesRef>

subtract

public BytesRef subtract(BytesRef output,
                BytesRef inc)

Description copied from class: Outputs

Eg subtract("foobar", "foo") -> "bar"

Specified by:

subtract in class Outputs<BytesRef>

add

public BytesRef add(BytesRef prefix,
           BytesRef output)

Description copied from class: Outputs

Eg add("foo", "bar") -> "foobar"

Specified by:

add in class Outputs<BytesRef>

write

public void write(BytesRef prefix,
         DataOutput out)
           throws IOException

Description copied from class: Outputs

Encode an output value into a DataOutput.

Specified by:

write in class Outputs<BytesRef>

Throws:

IOException

read

public BytesRef read(DataInput in)
              throws IOException

Description copied from class: Outputs

Decode an output value previously written with Outputs.write(Object, DataOutput).

Specified by:

read in class Outputs<BytesRef>

Throws:

IOException

skipOutput

public void skipOutput(DataInput in)
                throws IOException

Description copied from class: Outputs

Skip the output; defaults to just calling Outputs.read(org.apache.lucene.store.DataInput) and discarding the result.

Overrides:

skipOutput in class Outputs<BytesRef>

Throws:

IOException

getNoOutput

public BytesRef getNoOutput()

Description copied from class: Outputs

NOTE: this output is compared with == so you must ensure that all methods return the single object if it's really no output

Specified by:

getNoOutput in class Outputs<BytesRef>

outputToString

public String outputToString(BytesRef output)

Specified by:

outputToString in class Outputs<BytesRef>

ramBytesUsed

public long ramBytesUsed(BytesRef output)

Description copied from class: Outputs

Return memory usage for the provided output.

Specified by:

ramBytesUsed in class Outputs<BytesRef>

See Also:

Accountable