net.sf.sasl.language.placeholder.aop.interpreter
Class ASTInterpreter

java.lang.Object
  net.sf.sasl.language.placeholder.aop.interpreter.ASTInterpreter

All Implemented Interfaces:

IInterpreter

public class ASTInterpreter
extends Object
implements IInterpreter

Small interpreter that can interpreter a placeholder script given as an abstract placeholder syntax tree.
The targetMethod, targetObject, occuredException, targetReturnValue and targetArguments properties of IEnvironment will be also offered as interpreter environment variables.

Since:

0.0.1 (sasl-common-aspect-library)

Author:

Philipp Förmer

Constructor Summary

ASTInterpreter(ScriptNode script, IPlaceholderResolverSymbolTable symbolTable, IEnvironment environment)

ASTInterpreter(ScriptNode script, List<IPlaceholderResolver> resolverList, IEnvironment environment)

Method Summary

String	interpret() Interprets the placeholder script and returns the constructed string output.
void	setEnvironmentVariable(String name, Object value) Adds a shared environment variable, which could be accessed by placeholder resolvers, to the interpreter environment.

Methods inherited from class java.lang.Object

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

Constructor Detail

ASTInterpreter

public ASTInterpreter(ScriptNode script,
                      List<IPlaceholderResolver> resolverList,
                      IEnvironment environment)
               throws IllegalArgumentException

Parameters:

script - non null

resolverList - non null

environment - non null

Throws:

IllegalArgumentException - if one of the input parameters is null or the environment has got a null execution phase, target method or target object.

Since:

0.0.1 (sasl-common-aspect-library)

ASTInterpreter

public ASTInterpreter(ScriptNode script,
                      IPlaceholderResolverSymbolTable symbolTable,
                      IEnvironment environment)
               throws IllegalArgumentException

Parameters:

script - non null.

symbolTable - non null.

environment - non null.

Throws:

IllegalArgumentException - if one of the input parameters is null or the environment has got a null execution phase, target method or target object.

Since:

0.0.2 (sasl-common-aspect-library)

Method Detail

setEnvironmentVariable

public void setEnvironmentVariable(String name,
                                   Object value)

Adds a shared environment variable, which could be accessed by placeholder resolvers, to the interpreter environment.

Parameters:

name - null or non null

value - null or non null

Since:

0.0.1 (sasl-common-aspect-library)

interpret

public String interpret()
                 throws InterpreterException

Description copied from interface: IInterpreter

Interprets the placeholder script and returns the constructed string output.

Specified by:

interpret in interface IInterpreter

Returns:

non null

Throws:

InterpreterException - if any exception occurs during interpreting the placeholder script.

Since:

0.0.1 (sasl-common-aspect-library)

See Also:

IInterpreter.interpret()