Package com.singularsys.jep.misc.bitwise

Class BitwiseOperatorTable

java.lang.Object

com.singularsys.jep.EmptyOperatorTable

com.singularsys.jep.OperatorTable2

com.singularsys.jep.standard.StandardOperatorTable2

com.singularsys.jep.misc.bitwise.BitwiseOperatorTable

All Implemented Interfaces:

JepComponent, OperatorTableI, Serializable

Direct Known Subclasses:

JavaOperatorTable

public class BitwiseOperatorTable
extends StandardOperatorTable2

An operator table with a selection of bitwise operators.

• And: a & b
• Or: a | b
• Complement: ~a
• Xor: a ^ b
• Left shift: a >> b
• Right shift: a << b
• Right shift with zero extension: a <<< b

The BitwiseOperatorTable can be used as a drop in replacement for the StandardOperatorTable.

jep.setComponent(new BitwiseOperatorTable("**","^"));

Note the standard symbol used for power ^ conflicts with java's symbol used for xor, the constructor for the BitwiseOperatorTable takes two strings specifying the symbols used for power and xor respectively.

Author:

Richard Morris

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	BitwiseOperatorTable.BitwiseOperators

Nested classes/interfaces inherited from class com.singularsys.jep.OperatorTable2

OperatorTable2.BasicOperators, OperatorTable2.PsudoOperators, OperatorTable2.SpecialOperators

Nested classes/interfaces inherited from class com.singularsys.jep.EmptyOperatorTable

EmptyOperatorTable.OperatorKey

Constructor Summary

Constructors

Modifier	Constructor	Description
	BitwiseOperatorTable(OperatorTable2 oldTable, String powerSymbol, String xorSymbol)	A decorator constructor.
	BitwiseOperatorTable(String powerSymbol, String xorSymbol)	Standard constructor.
protected	BitwiseOperatorTable(Map<EmptyOperatorTable.OperatorKey,Operator> map)

Method Summary

Modifier and Type	Method	Description
protected void	addBitOperators(String powerSymbol, String xorSymbol)
Operator	getBitAnd()
Operator	getBitComp()
Operator	getBitOr()
Operator	getBitXor()
Operator	getLShift()
Operator	getRShift()
Operator	getURShift()
protected void	setBasicPfmcs()	A do nothing implementation.
protected void	setBitPfmcs()
protected void	setPsudoPfmcs()	A do nothing implementation.
protected void	setSpecialPfmcs()	A do nothing implementation.
OperatorTableI	shallowCopy()	Create a new version of this OperatorTable.

Methods inherited from class com.singularsys.jep.OperatorTable2

getAdd, getAnd, getAssign, getCross, getDivide, getDot, getEle, getEQ, getGE, getGT, getLE, getList, getLT, getMod, getMultiply, getNE, getNop, getNot, getOr, getPower, getRange, getSubtract, getUDivide, getUMinus, getUPlus

Methods inherited from class com.singularsys.jep.EmptyOperatorTable

addOperator, addOperator, addOperator, appendOperator, appendOperator, entrySet, getKey, getLightWeightInstance, getNumOps, getOperator, getOperatorMap, getOperators, getOperatorsByName, getOperatorsBySymbol, init, insertOperator, insertOperator, keySet, removeOperator, removeOperator, replaceOperator, replaceOperator, setBinaryInverseOp, setDistributiveOver, setGroupOperatorRelations, setGroupOperatorRelations, setInverseOp, setPrecedenceTable, setRootOp, setStandardOperatorRelations, threadSafeMapCopy, toString

Methods inherited from class java.lang.Object

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

Constructor Details

BitwiseOperatorTable

public BitwiseOperatorTable(String powerSymbol,
 String xorSymbol)

Standard constructor.

Parameters:

powerSymbol - string used to represent power.

xorSymbol - string used to represent xor.

BitwiseOperatorTable

public BitwiseOperatorTable(OperatorTable2 oldTable,
 String powerSymbol,
 String xorSymbol)

A decorator constructor. Takes all the operators supplied in the oldTable and add extra bitwise operations.

Parameters:

oldTable - table with most operators.

powerSymbol - string used to represent power.

xorSymbol - string used to represent xor.

BitwiseOperatorTable

protected BitwiseOperatorTable(Map<EmptyOperatorTable.OperatorKey,Operator> map)

Method Details

setBasicPfmcs

protected void setBasicPfmcs()

A do nothing implementation.

Overrides:

setBasicPfmcs in class StandardOperatorTable2

See Also:

• OperatorTable2.BasicOperators

setSpecialPfmcs

protected void setSpecialPfmcs()

A do nothing implementation.

Overrides:

setSpecialPfmcs in class StandardOperatorTable2

See Also:

• OperatorTable2.SpecialOperators

setPsudoPfmcs

protected void setPsudoPfmcs()

A do nothing implementation.

Overrides:

setPsudoPfmcs in class StandardOperatorTable2

addBitOperators

protected void addBitOperators(String powerSymbol,
 String xorSymbol)

setBitPfmcs

protected void setBitPfmcs()

getBitAnd

public Operator getBitAnd()

getBitOr

public Operator getBitOr()

getBitXor

public Operator getBitXor()

getBitComp

public Operator getBitComp()

getLShift

public Operator getLShift()

getRShift

public Operator getRShift()

getURShift

public Operator getURShift()

shallowCopy

public OperatorTableI shallowCopy()

Description copied from class: EmptyOperatorTable

Create a new version of this OperatorTable. Operators are copied into new table. However, Operators whose pfmc implement JepComponent are duplicated. This means the table could be used in a separate thread without problem. Subclasses should override with method to return a table of the correct type, a typical implementation would be

    @Override
    public OperatorTableI shallowCopy() {
        Map<OperatorKey, Operator> map = this.threadSafeMapCopy();
        return new MyOperatorTable(map);
    }
 

using the EmptyOperatorTable.threadSafeMapCopy() method to return a copy of the map of operators and a constructor taking this map which uses the EmptyOperatorTable(Map) constructor.

Specified by:

shallowCopy in interface OperatorTableI

Overrides:

shallowCopy in class StandardOperatorTable2

Returns:

a new Table