Package org.apache.sling.scripting.sightly.impl.compiler.optimization.reduce

Class ExpressionReducer

java.lang.Object

org.apache.sling.scripting.sightly.impl.compiler.optimization.reduce.ExpressionReducer

All Implemented Interfaces:

NodeVisitor<EvalResult>

public class ExpressionReducer
extends Object
implements NodeVisitor<EvalResult>

Try to evaluate constant parts in expressions

Method Summary

Modifier and Type	Method	Description
EvalResult	evaluate(ArrayLiteral arrayLiteral)	Evaluate a ArrayLiteral node.
EvalResult	evaluate(BinaryOperation binaryOperation)	Evaluate a BinaryOperation node.
EvalResult	evaluate(BooleanConstant booleanConstant)	Evaluate a BooleanConstant node.
EvalResult	evaluate(Identifier identifier)	Evaluate an Identifier node.
EvalResult	evaluate(MapLiteral mapLiteral)	Evaluate a MapLiteral node.
EvalResult	evaluate(NullLiteral nullLiteral)	Evaluate a NullLiteral node.
EvalResult	evaluate(NumericConstant numericConstant)	Evaluate a NumericConstant node.
EvalResult	evaluate(PropertyAccess propertyAccess)	Evaluate a PropertyAccess node.
EvalResult	evaluate(RuntimeCall runtimeCall)	Evaluate a RuntimeCall node.
EvalResult	evaluate(StringConstant text)	Evaluate a StringConstant node.
EvalResult	evaluate(TernaryOperator ternaryOperator)	Evaluate a TernaryOperator node.
EvalResult	evaluate(UnaryOperation unaryOperation)	Evaluate a UnaryOperation node.
static EvalResult	reduce(ExpressionNode node, VariableTracker<EvalResult> tracker)

Methods inherited from class java.lang.Object

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

Method Detail

reduce

public static EvalResult reduce(ExpressionNode node,
                                VariableTracker<EvalResult> tracker)

evaluate

public EvalResult evaluate(PropertyAccess propertyAccess)

Description copied from interface: NodeVisitor

Evaluate a PropertyAccess node.

Specified by:

evaluate in interface NodeVisitor<EvalResult>

Parameters:

propertyAccess - the node to evaluate

Returns:

the evaluation result

evaluate

public EvalResult evaluate(Identifier identifier)

Description copied from interface: NodeVisitor

Evaluate an Identifier node.

Specified by:

evaluate in interface NodeVisitor<EvalResult>

Parameters:

identifier - the node to evaluate

Returns:

the evaluation result

evaluate

public EvalResult evaluate(StringConstant text)

Description copied from interface: NodeVisitor

Evaluate a StringConstant node.

Specified by:

evaluate in interface NodeVisitor<EvalResult>

Parameters:

text - the node to evaluate

Returns:

the evaluation result

evaluate

public EvalResult evaluate(BinaryOperation binaryOperation)

Description copied from interface: NodeVisitor

Evaluate a BinaryOperation node.

Specified by:

evaluate in interface NodeVisitor<EvalResult>

Parameters:

binaryOperation - the node to evaluate

Returns:

the evaluation result

evaluate

public EvalResult evaluate(BooleanConstant booleanConstant)

Description copied from interface: NodeVisitor

Evaluate a BooleanConstant node.

Specified by:

evaluate in interface NodeVisitor<EvalResult>

Parameters:

booleanConstant - the node to evaluate

Returns:

the evaluation result

evaluate

public EvalResult evaluate(NumericConstant numericConstant)

Description copied from interface: NodeVisitor

Evaluate a NumericConstant node.

Specified by:

evaluate in interface NodeVisitor<EvalResult>

Parameters:

numericConstant - the node to evaluate

Returns:

the evaluation result

evaluate

public EvalResult evaluate(UnaryOperation unaryOperation)

Description copied from interface: NodeVisitor

Evaluate a UnaryOperation node.

Specified by:

evaluate in interface NodeVisitor<EvalResult>

Parameters:

unaryOperation - the node to evaluate

Returns:

the evaluation result

evaluate

public EvalResult evaluate(TernaryOperator ternaryOperator)

Description copied from interface: NodeVisitor

Evaluate a TernaryOperator node.

Specified by:

evaluate in interface NodeVisitor<EvalResult>

Parameters:

ternaryOperator - the node to evaluate

Returns:

the evaluation result

evaluate

public EvalResult evaluate(RuntimeCall runtimeCall)

Description copied from interface: NodeVisitor

Evaluate a RuntimeCall node.

Specified by:

evaluate in interface NodeVisitor<EvalResult>

Parameters:

runtimeCall - the node to evaluate

Returns:

the evaluation result

evaluate

public EvalResult evaluate(MapLiteral mapLiteral)

Description copied from interface: NodeVisitor

Evaluate a MapLiteral node.

Specified by:

evaluate in interface NodeVisitor<EvalResult>

Parameters:

mapLiteral - the node to evaluate

Returns:

the evaluation result

evaluate

public EvalResult evaluate(ArrayLiteral arrayLiteral)

Description copied from interface: NodeVisitor

Evaluate a ArrayLiteral node.

Specified by:

evaluate in interface NodeVisitor<EvalResult>

Parameters:

arrayLiteral - the node to evaluate

Returns:

the evaluation result

evaluate

public EvalResult evaluate(NullLiteral nullLiteral)

Description copied from interface: NodeVisitor

Evaluate a NullLiteral node.

Specified by:

evaluate in interface NodeVisitor<EvalResult>

Parameters:

nullLiteral - the node to evaluate

Returns:

the evaluation result