brown.tracingplane.atomlayer

Class AtomLayerOverflow

java.lang.Object

brown.tracingplane.atomlayer.AtomLayerOverflow

public class AtomLayerOverflow
extends java.lang.Object

Contains static methods for trimming baggage atoms to size extents.

Field Summary

Fields

Modifier and Type	Field and Description
static java.nio.ByteBuffer	OVERFLOW_MARKER

Method Summary

Modifier and Type	Method and Description
static java.util.List<java.nio.ByteBuffer>	mergeOverflowAtoms(java.util.List<java.nio.ByteBuffer> a, java.util.List<java.nio.ByteBuffer> b) Merge the provided atoms until an overflow marker is encountered.
static java.util.List<java.nio.ByteBuffer>	trimToFirstOverflow(java.util.List<java.nio.ByteBuffer> atoms)
static java.util.List<java.nio.ByteBuffer>	trimToSize(java.util.List<java.nio.ByteBuffer> atoms, int limit) If the serialized size of atoms is <=limit then this method returns atoms with no modifications.

Methods inherited from class java.lang.Object

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

Field Detail

OVERFLOW_MARKER

public static final java.nio.ByteBuffer OVERFLOW_MARKER

Method Detail

trimToSize

public static java.util.List<java.nio.ByteBuffer> trimToSize(java.util.List<java.nio.ByteBuffer> atoms,
                                                             int limit)

If the serialized size of atoms is <=limit then this method returns atoms with no modifications. Otherwise, this method returns the maximum prefix of atoms such that its serialized size will be <=limit. The returned prefix will also have OVERFLOW_MARKER appended to the end. OVERFLOW_MARKER is taken into account when calculating serialized size, so the return value of this method is guaranteed to be serialized to <=limit bytes.

Parameters:

atoms - a list of atoms, possibly null

limit - the maximum serialized size of atoms

Returns:

atoms if the serialized size of atoms is <= limit, otherwise a prefix of atoms OVERFLOW_MARKER. Returns null if atoms is null

trimToFirstOverflow

public static java.util.List<java.nio.ByteBuffer> trimToFirstOverflow(java.util.List<java.nio.ByteBuffer> atoms)

mergeOverflowAtoms

public static java.util.List<java.nio.ByteBuffer> mergeOverflowAtoms(java.util.List<java.nio.ByteBuffer> a,
                                                                     java.util.List<java.nio.ByteBuffer> b)

Merge the provided atoms until an overflow marker is encountered. Include the encountered overflow marker then stop.