Package org.apache.xerces.impl.dtd.models

Class CMStateSet

java.lang.Object
org.apache.xerces.impl.dtd.models.CMStateSet
public class CMStateSet extends Object
This class is a very simple bitset class. The DFA content model code needs to support a bit set, but the java BitSet class is way, way overkill. Our bitset never needs to be expanded after creation, hash itself, etc... Since the vast majority of content models will never require more than 64 bits, and since allocation of anything in Java is expensive, this class provides a hybrid implementation that uses two ints for instances that use 64 bits or fewer. It has a byte array reference member which will only be used if more than 64 bits are required. Note that the code that uses this class will never perform operations on sets of different sizes, so that check does not have to be made here.

INTERNAL:

Usage of this class is not supported. It may be altered or removed at any time.
Version:
$Id: CMStateSet.java 446752 2006-09-15 21:55:19Z mrglavas $

  • Constructor Details

    • CMStateSet

      public CMStateSet(int bitCount)

  • Method Details

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • intersection

      public final void intersection(CMStateSet setToAnd)

    • getBit

      public final boolean getBit(int bitToGet)

    • isEmpty

      public final boolean isEmpty()

    • union

      public final void union(CMStateSet setToOr)

    • setBit

      public final void setBit(int bitToSet)

    • setTo

      public final void setTo(CMStateSet srcSet)

    • zeroBits

      public final void zeroBits()

    • equals

      public boolean equals(Object o)
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object