morfologik.stemming

Class TrimPrefixAndSuffixEncoder

java.lang.Object

morfologik.stemming.TrimPrefixAndSuffixEncoder

All Implemented Interfaces:

ISequenceEncoder

public class TrimPrefixAndSuffixEncoder
extends java.lang.Object
implements ISequenceEncoder

Encodes dst relative to src by trimming whatever non-equal suffix and prefix src and dst have. The output code is (bytes):

 {P}{K}{suffix}
 

where (P - 'A') bytes should be trimmed from the start of src, (K - 'A') bytes should be trimmed from the end of src and then the suffix should be appended to the resulting byte sequence.

Examples:

 src: abc
 dst: abcd
 encoded: AAd
 
 src: abc
 dst: xyz
 encoded: ADxyz
 

Constructor Summary

Constructors

Constructor and Description
TrimPrefixAndSuffixEncoder()

Method Summary

Modifier and Type	Method and Description
java.nio.ByteBuffer	decode(java.nio.ByteBuffer reuse, java.nio.ByteBuffer source, java.nio.ByteBuffer encoded) Decodes encoded relative to source, optionally reusing the provided ByteBuffer.
java.nio.ByteBuffer	encode(java.nio.ByteBuffer reuse, java.nio.ByteBuffer source, java.nio.ByteBuffer target) Encodes target relative to source, optionally reusing the provided ByteBuffer.
int	prefixBytes() The number of encoded form's prefix bytes that should be ignored (needed for separator lookup).
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

TrimPrefixAndSuffixEncoder

public TrimPrefixAndSuffixEncoder()

Method Detail

encode

public java.nio.ByteBuffer encode(java.nio.ByteBuffer reuse,
                                  java.nio.ByteBuffer source,
                                  java.nio.ByteBuffer target)

Description copied from interface: ISequenceEncoder

Encodes target relative to source, optionally reusing the provided ByteBuffer.

Specified by:

encode in interface ISequenceEncoder

Parameters:

reuse - Reuses the provided ByteBuffer or allocates a new one if there is not enough remaining space.

source - The source byte sequence.

target - The target byte sequence to encode relative to source

Returns:

Returns the ByteBuffer with encoded target.

prefixBytes

public int prefixBytes()

Description copied from interface: ISequenceEncoder

The number of encoded form's prefix bytes that should be ignored (needed for separator lookup). An ugly workaround for GH-85, should be fixed by prior knowledge of whether the dictionary contains tags; then we can scan for separator right-to-left.

Specified by:

prefixBytes in interface ISequenceEncoder

See Also:

"https://github.com/morfologik/morfologik-stemming/issues/85"

decode

public java.nio.ByteBuffer decode(java.nio.ByteBuffer reuse,
                                  java.nio.ByteBuffer source,
                                  java.nio.ByteBuffer encoded)

Description copied from interface: ISequenceEncoder

Decodes encoded relative to source, optionally reusing the provided ByteBuffer.

Specified by:

decode in interface ISequenceEncoder

Parameters:

reuse - Reuses the provided ByteBuffer or allocates a new one if there is not enough remaining space.

source - The source byte sequence.

encoded - The previously encoded byte sequence.

Returns:

Returns the ByteBuffer with decoded target.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object