org.apache.nifi.util.search

Class SearchTerm<T>

java.lang.Object

org.apache.nifi.util.search.SearchTerm<T>

public class SearchTerm<T>
extends Object

This is an immutable thread safe object representing a search term

Field Summary

Fields

Modifier and Type	Field and Description
private byte[]	bytes
private int	hashCode
private T	reference

Constructor Summary

Constructors

Constructor and Description
SearchTerm(byte[] bytes) Constructs a SearchTerm.
SearchTerm(byte[] bytes, boolean defensiveCopy, T reference) Constructs a search term.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj)
int	get(int index)
byte[]	getBytes()
T	getReference()
int	hashCode()
int	size()
boolean	startsWith(byte[] window, int windowLength) Determines if the given window starts with the same bytes as this term
String	toString()
String	toString(Charset charset)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

bytes

private final byte[] bytes

hashCode

private final int hashCode

reference

private final T reference

Constructor Detail

SearchTerm

public SearchTerm(byte[] bytes)

Constructs a SearchTerm. Defensively copies the given byte array

Parameters:

bytes - the bytes of the search term

Throws:

IllegalArgumentException - if given bytes are null or 0 length

SearchTerm

public SearchTerm(byte[] bytes,
                  boolean defensiveCopy,
                  T reference)

Constructs a search term. Optionally performs a defensive copy of the given byte array. If the caller indicates a defensive copy is not necessary then they must not change the given arrays state any longer

Parameters:

bytes - the bytes of the new search term

defensiveCopy - if true will make a defensive copy; false otherwise

reference - a holder for an object which can be retrieved when this search term hits

Method Detail

get

public int get(int index)

size

public int size()

Returns:

size in of search term in bytes

getReference

public T getReference()

Returns:

reference object for this given search term

startsWith

public boolean startsWith(byte[] window,
                          int windowLength)

Determines if the given window starts with the same bytes as this term

Parameters:

window - bytes from the haystack being evaluated

windowLength - The length of the window to consider

Returns:

true if this term starts with the same bytes of the given window

getBytes

public byte[] getBytes()

Returns:

a defensive copy of the internal byte structure

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

toString

public String toString(Charset charset)