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Java Source Code / Java Documentation » Search Engine » lucene » org.apache.lucene.index 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   org.apache.lucene.index.Payload

Payload
public class Payload implements Serializable,Cloneable(Code)
A Payload is metadata that can be stored together with each occurrence of a term. This metadata is stored inline in the posting list of the specific term.

To store payloads in the index a TokenStream has to be used that produces Token s containing payload data.

Use TermPositions.getPayloadLength and TermPositions.getPayload(byte[]int) to retrieve the payloads from the index.



Field Summary
protected  byte[]data
    
protected  intlength
    
protected  intoffset
    

Constructor Summary
public  Payload()
     Creates an empty payload and does not allocate a byte array.
public  Payload(byte[] data)
     Creates a new payload with the the given array as data. A reference to the passed-in array is held, i.
public  Payload(byte[] data, int offset, int length)
     Creates a new payload with the the given array as data.

Method Summary
public  bytebyteAt(int index)
     Returns the byte at the given index.
public  Objectclone()
     Clones this payload by creating a copy of the underlying byte array.
public  voidcopyTo(byte[] target, int targetOffset)
     Copies the payload data to a byte array.
public  byte[]getData()
     Returns a reference to the underlying byte array that holds this payloads data.
public  intgetOffset()
    
public  intlength()
     Returns the length of the payload data.
public  voidsetData(byte[] data)
     Sets this payloads data.
public  voidsetData(byte[] data, int offset, int length)
     Sets this payloads data.
public  byte[]toByteArray()
     Allocates a new byte array, copies the payload data into it and returns it.

Field Detail
data
protected byte[] data(Code)
the byte array containing the payload data



length
protected int length(Code)
the length of the payload data



offset
protected int offset(Code)
the offset within the byte array




Constructor Detail
Payload
public Payload()(Code)
Creates an empty payload and does not allocate a byte array.



Payload
public Payload(byte[] data)(Code)
Creates a new payload with the the given array as data. A reference to the passed-in array is held, i. e. no copy is made.
Parameters:
  data - the data of this payload



Payload
public Payload(byte[] data, int offset, int length)(Code)
Creates a new payload with the the given array as data. A reference to the passed-in array is held, i. e. no copy is made.
Parameters:
  data - the data of this payload
Parameters:
  offset - the offset in the data byte array
Parameters:
  length - the length of the data




Method Detail
byteAt
public byte byteAt(int index)(Code)
Returns the byte at the given index.



clone
public Object clone()(Code)
Clones this payload by creating a copy of the underlying byte array.



copyTo
public void copyTo(byte[] target, int targetOffset)(Code)
Copies the payload data to a byte array.
Parameters:
  target - the target byte array
Parameters:
  targetOffset - the offset in the target byte array



getData
public byte[] getData()(Code)
Returns a reference to the underlying byte array that holds this payloads data.



getOffset
public int getOffset()(Code)
Returns the offset in the underlying byte array



length
public int length()(Code)
Returns the length of the payload data.



setData
public void setData(byte[] data)(Code)
Sets this payloads data. A reference to the passed-in array is held, i. e. no copy is made.



setData
public void setData(byte[] data, int offset, int length)(Code)
Sets this payloads data. A reference to the passed-in array is held, i. e. no copy is made.



toByteArray
public byte[] toByteArray()(Code)
Allocates a new byte array, copies the payload data into it and returns it.



Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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