LazilyConcatenatedByteArray (POI API Documentation)

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org.apache.poi.hssf.util
Class LazilyConcatenatedByteArray

java.lang.Object
  org.apache.poi.hssf.util.LazilyConcatenatedByteArray

public class LazilyConcatenatedByteArray
extends java.lang.Object
extends java.lang.Object

Utility for delaying the concatenation of multiple byte arrays. Doing this up-front causes significantly more copying, which for a large number of byte arrays can cost a large amount of time.

Constructor Summary
`LazilyConcatenatedByteArray()`

Method Summary
`void`	`clear()` Clears the array (sets the concatenated length back to zero.
`void`	`concatenate(byte[] array)` Concatenates an array onto the end of our array.
`byte[]`	`toArray()` Gets the concatenated contents as a single byte array.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

LazilyConcatenatedByteArray

public LazilyConcatenatedByteArray()

Method Detail

clear

public void clear()

Clears the array (sets the concatenated length back to zero.

concatenate

public void concatenate(byte[] array)

Concatenates an array onto the end of our array. This is a relatively fast operation.

Parameters:: array - the array to concatenate.
Throws:: java.lang.IllegalArgumentException - if array is null.

toArray

public byte[] toArray()

Gets the concatenated contents as a single byte array. This is a slower operation, but the concatenated array is stored off as a single array again so that subsequent calls will not perform additional copying.

Returns:: the byte array. Returns null if no data has been placed into it.