org.ow2.opensuit.cel
Interface IExpression

All Known Subinterfaces:

IExprNode

All Known Implementing Classes:

AstBinaryOperation, AstBoolean, AstBracket, AstChoice, AstComposite, AstDot, AstEval, AstFunction, AstIdentifier, AstInvocation, AstLiteral, AstMethod, AstNested, AstNode, AstNull, AstNumber, AstProperty, AstRightValue, AstString, AstText, AstUnaryOperation

public interface IExpression

This interface declare the available methods for an expression

Version:

1.0

Author:

Adrien Ruffie / Pierre Smeyers, http://opensuit.ow2.org/

Method Summary

java.lang.String	getExpressionString() Returns the expression string
java.lang.reflect.Type	getGenericType() Returns the expression generic type
java.lang.Class<?>	getType() Returns the expression type
java.lang.String	getValuePattern() Returns the string value pattern (regular expression).
java.lang.Object	invoke(IEvaluationContext iContext) Evaluates the expression.
boolean	isReadOnly() Returns true if the expression cannot be set
boolean	isStaticValue() Returns true if the expression has a static value (i.e. that does not depend on any evaluation context).
void	set(IEvaluationContext iContext, java.lang.Object iValue) Assigns a value to this expression (if no read only)

Method Detail

invoke

java.lang.Object invoke(IEvaluationContext iContext)
                        throws java.lang.Exception

Evaluates the expression.

Throws:

java.lang.Exception

getType

java.lang.Class<?> getType()

Returns the expression type

getGenericType

java.lang.reflect.Type getGenericType()

Returns the expression generic type

isReadOnly

boolean isReadOnly()

Returns true if the expression cannot be set

Returns:

boolean

isStaticValue

boolean isStaticValue()

Returns true if the expression has a static value (i.e. that does not depend on any evaluation context). In such a case, the invoke(...) method may be called with a null evaluation context.

Returns:

boolean

getValuePattern

java.lang.String getValuePattern()

Returns the string value pattern (regular expression).

Returns:

String

set

void set(IEvaluationContext iContext,
         java.lang.Object iValue)
         throws java.lang.Exception

Assigns a value to this expression (if no read only)

Throws:

java.lang.Exception

getExpressionString

java.lang.String getExpressionString()

Returns the expression string

Returns:

String