Class ExpressionPool.ClosedHash

java.lang.Object

com.sun.msv.grammar.ExpressionPool.ClosedHash

All Implemented Interfaces:

Serializable

Enclosing class:

ExpressionPool

public static final class ExpressionPool.ClosedHash
extends Object
implements Serializable

expression cache by closed hash. Special care has to be taken wrt threading. This implementation allows get and put method to be called simulatenously.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private int	count	The total number of mappings in the hash table.
private static final int	initialCapacity
private static final float	loadFactor	The load factor for the hashtable.
private ExpressionPool.ClosedHash	parent	The parent hash table.
private static final ObjectStreamField[]	serialPersistentFields
private static final long	serialVersionUID
private Expression[]	table	The hash table data.
private int	threshold	The table is rehashed when its size exceeds this threshold.

Constructor Summary

Constructors

Constructor	Description
ClosedHash()
ClosedHash(ExpressionPool.ClosedHash parent)

Method Summary

Modifier and Type	Method	Description
Expression	get(int hash, Expression child, Class type)
Expression	get(Expression key)
private Expression	getBinExp(int hash, Expression left, Expression right, Class type)
Expression	getBinExp(Expression left, Expression right, Class type)
void	put(Expression newExp)	put method.
private void	readObject(ObjectInputStream s)
private void	rehash()	rehash.
private void	writeObject(ObjectOutputStream s)

Methods inherited from class Object

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

Field Details

table

private Expression[] table

The hash table data.

count

private int count

The total number of mappings in the hash table.

threshold

private int threshold

The table is rehashed when its size exceeds this threshold. (The value of this field is (int)(capacity * loadFactor).)

loadFactor

private static final float loadFactor

The load factor for the hashtable.

See Also:

• Constant Field Values

initialCapacity

private static final int initialCapacity

See Also:

• Constant Field Values

parent

private ExpressionPool.ClosedHash parent

The parent hash table. can be null. items in the parent hash table will be returned by get method.

The field is essentially final but because of the serialization support we cannot mark it as such.

serialVersionUID

private static final long serialVersionUID

See Also:

• Constant Field Values

serialPersistentFields

private static final ObjectStreamField[] serialPersistentFields

Constructor Details

ClosedHash

public ClosedHash()

ClosedHash

public ClosedHash(ExpressionPool.ClosedHash parent)

Method Details

getBinExp

public Expression getBinExp(Expression left,
 Expression right,
 Class type)

getBinExp

private Expression getBinExp(int hash,
 Expression left,
 Expression right,
 Class type)

get

public Expression get(int hash,
 Expression child,
 Class type)

get

public Expression get(Expression key)

rehash

private void rehash()

rehash. It is possible for one thread to call get method while another thread is performing rehash. Keep this in mind.

put

public void put(Expression newExp)

put method. No two threads can call this method simulatenously, and it's the caller's responsibility to enforce it.

writeObject

private void writeObject(ObjectOutputStream s)
                  throws IOException

Throws:

IOException

readObject

private void readObject(ObjectInputStream s)
                 throws IOException,
ClassNotFoundException

Throws:

IOException

ClassNotFoundException