Class CMStateSet
- java.lang.Object
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- org.apache.xerces.impl.dtd.models.CMStateSet
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public class CMStateSet extends java.lang.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 $
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Constructor Summary
Constructors Constructor Description CMStateSet(int bitCount)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
equals(java.lang.Object o)
boolean
getBit(int bitToGet)
int
hashCode()
void
intersection(CMStateSet setToAnd)
boolean
isEmpty()
void
setBit(int bitToSet)
void
setTo(CMStateSet srcSet)
java.lang.String
toString()
void
union(CMStateSet setToOr)
void
zeroBits()
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Method Detail
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toString
public java.lang.String toString()
- Overrides:
toString
in classjava.lang.Object
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intersection
public final void intersection(CMStateSet setToAnd)
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getBit
public final boolean getBit(int bitToGet)
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isEmpty
public final boolean isEmpty()
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union
public final void union(CMStateSet setToOr)
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setBit
public final void setBit(int bitToSet)
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setTo
public final void setTo(CMStateSet srcSet)
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zeroBits
public final void zeroBits()
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equals
public boolean equals(java.lang.Object o)
- Overrides:
equals
in classjava.lang.Object
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hashCode
public int hashCode()
- Overrides:
hashCode
in classjava.lang.Object
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