de.intarsys.tools.expression

Class ScopedResolver

java.lang.Object

de.intarsys.tools.expression.ScopedResolver

All Implemented Interfaces:

IStringEvaluator

public class ScopedResolver
extends Object
implements IStringEvaluator

An IStringEvaluator that supports a list of other resolvers that are each asked in turn for evaluating the result.

Constructor Summary

Constructors

Constructor and Description
ScopedResolver()

Method Summary

Methods

Modifier and Type	Method and Description
void	addResolver(IStringEvaluator resolver) Add a new resolver at the end of the search sequence.
static ScopedResolver	create(IStringEvaluator... evaluator) Create a ScopedResolver, looking up its resolver scopes in the order defined in the argument list (most significant first).
Object	evaluate(String expression, IArgs args) Evaluate an expression according to the syntax used by the implementor and return the result.
IStringEvaluator	popResolver()
void	pushResolver(IStringEvaluator resolver) Add a new resolver at the beginning of the search sequence.
void	removeResolver(IStringEvaluator resolver)

Methods inherited from class java.lang.Object

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

Constructor Detail

ScopedResolver

public ScopedResolver()

Method Detail

create

public static ScopedResolver create(IStringEvaluator... evaluator)

Create a ScopedResolver, looking up its resolver scopes in the order defined in the argument list (most significant first).

Parameters:

evaluator -

Returns:

addResolver

public void addResolver(IStringEvaluator resolver)

Add a new resolver at the end of the search sequence.

Parameters:

resolver -

evaluate

public Object evaluate(String expression,
              IArgs args)
                throws EvaluationException

Description copied from interface: IStringEvaluator

Evaluate an expression according to the syntax used by the implementor and return the result.

Specified by:

evaluate in interface IStringEvaluator

Parameters:

expression - The expression to evaluate.

Returns:

The result object.

Throws:

EvaluationException - If we encounter a compile or runtime error.

popResolver

public IStringEvaluator popResolver()

pushResolver

public void pushResolver(IStringEvaluator resolver)

Add a new resolver at the beginning of the search sequence.

Parameters:

resolver -

removeResolver

public void removeResolver(IStringEvaluator resolver)