com.codemesh.terp.eval.executors
Class LvalueMinusAssignment

java.lang.Object
  com.codemesh.terp.api.Executor.AbstractExecutor<java.lang.Object>
      com.codemesh.terp.eval.executors.LvalueMinusAssignment

All Implemented Interfaces:

Executor<java.lang.Object>

public class LvalueMinusAssignment
extends Executor.AbstractExecutor<java.lang.Object>

Implements a -= operation for lvalues and several builtin types.

Nested Class Summary

Nested classes/interfaces inherited from interface com.codemesh.terp.api.Executor

Executor.AbstractExecutor<T>, Executor.ForMethod

Constructor Summary

LvalueMinusAssignment()

Method Summary

java.lang.Object	execute(java.util.List<java.lang.Object> args, TerpEvaluator eval, TerpContext ctx) Performs the executor's action on the given arguments in the given context.
boolean	matches(java.util.List args) Returns true if the executor applies to the given arguments.

Methods inherited from class com.codemesh.terp.api.Executor.AbstractExecutor

execute

Methods inherited from class java.lang.Object

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

Constructor Detail

LvalueMinusAssignment

public LvalueMinusAssignment()

Method Detail

matches

public boolean matches(java.util.List args)

Description copied from interface: Executor

Returns true if the executor applies to the given arguments. Typically, your custom executor will implement this method to check for the proper number of arguments and the proper argument types.

Parameters:

args - the arguments passed to the executor.

Returns:

true if the executor knows how to handle the given arguments, false otherwise.

execute

public java.lang.Object execute(java.util.List<java.lang.Object> args,
                                TerpEvaluator eval,
                                TerpContext ctx)

Description copied from interface: Executor

Performs the executor's action on the given arguments in the given context. Typically, your custom executor will implement this method to provide its core functionality.

Parameters:

args - the arguments.

eval - the evaluator to use. Can frequently be null.

ctx - the context in which the execution occurs. Can frequently be null.

Returns:

the execution result.