com.whitestein.lsps.lang

Class ExpressionAsClosureHolder

java.lang.Object

com.whitestein.lsps.lang.AbstractClosureHolder

com.whitestein.lsps.lang.ExpressionAsClosureHolder

All Implemented Interfaces:

ClosureHolder, ClosureHolderInternal, ValueHolder

public class ExpressionAsClosureHolder
extends AbstractClosureHolder

This is an adapter which creates a ClosureHolder from an expression. The expression is treated as a closure without arguments.

Author:

rba

Constructor Summary

Constructors

Constructor and Description
ExpressionAsClosureHolder(Namespace namespace, ClosureType type, Expression expr, ClosureOrigin origin) Creates new instance of ClosureExpressionHolder.

Method Summary

Modifier and Type	Method and Description
Object	execute(InterpreterConfiguration configuration, InterpreterStackTrace stackTrace, Object... args) Executes this closure with given arguments.
Object	executeInNamespace(Namespace namespace, InterpreterStackTrace stackTrace, Object... arguments) Execute this closure in the given namespace.
ClosureOrigin	getClosureOrigin()
String	getExpressionString() Returns a string representation of this closure holder expression.
ClosureType	getType() Returns the type of the holder.

Methods inherited from class com.whitestein.lsps.lang.AbstractClosureHolder

execute, execute, execute, getId, getNamespace, getNotCompiledValueHolder

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionAsClosureHolder

public ExpressionAsClosureHolder(Namespace namespace,
                                 ClosureType type,
                                 Expression expr,
                                 ClosureOrigin origin)

Creates new instance of ClosureExpressionHolder.

Parameters:

namespace -

type -

expr -

origin - the expression origin

Throws:

NullPointerException - if namespace or type or expr is null

Method Detail

execute

public Object execute(InterpreterConfiguration configuration,
                      InterpreterStackTrace stackTrace,
                      Object... args)
               throws ErrorException

Description copied from interface: ClosureHolder

Executes this closure with given arguments.

Parameters:

configuration - configuration to apply while interpreting closure

stackTrace - a stack trace

Returns:

the result of execution

Throws:

ErrorException

executeInNamespace

public Object executeInNamespace(Namespace namespace,
                                 InterpreterStackTrace stackTrace,
                                 Object... arguments)
                          throws ErrorException

Description copied from interface: ClosureHolderInternal

Execute this closure in the given namespace. Use carefully!

Returns:

a result

Throws:

ErrorException

getType

public ClosureType getType()

Description copied from interface: ValueHolder

Returns the type of the holder.

Returns:

the type of the holder

getExpressionString

public String getExpressionString()

Description copied from interface: ClosureHolder

Returns a string representation of this closure holder expression.

Returns:

a string representation of this closure holder expression

getClosureOrigin

public ClosureOrigin getClosureOrigin()

Returns:

the closure origin, may be null