edu.stanford.nlp.ling.tokensregex.types
Class Expressions.SimpleCachedExpression<T>

java.lang.Object
  edu.stanford.nlp.ling.tokensregex.types.Expressions.TypedExpression
      edu.stanford.nlp.ling.tokensregex.types.Expressions.SimpleExpression<T>
          edu.stanford.nlp.ling.tokensregex.types.Expressions.SimpleCachedExpression<T>

Type Parameters:

T - type of the expression object

All Implemented Interfaces:

Expression, java.io.Serializable

Direct Known Subclasses:

Expressions.CompositeValue

Enclosing class:

Expressions

public static class Expressions.SimpleCachedExpression<T>
extends Expressions.SimpleExpression<T>

A simple implementation of an expression that is represented by a java object of type T and which also has a cached Value stored with it

See Also:

Serialized Form

Constructor Summary

protected

Expressions.SimpleCachedExpression(java.lang.String typename, T value, java.lang.String... tags)

Method Summary

protected Value	doEvaluation(Env env, java.lang.Object... args)
Value	evaluate(Env env, java.lang.Object... args) Evaluates the expression using the specified environment and arguments.
boolean	hasValue() Returns whether the expression has already been evaluated to a Value

Methods inherited from class edu.stanford.nlp.ling.tokensregex.types.Expressions.SimpleExpression

get, toString

Methods inherited from class edu.stanford.nlp.ling.tokensregex.types.Expressions.TypedExpression

getTags, getType, setTags, simplify

Methods inherited from class java.lang.Object

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

Constructor Detail

Expressions.SimpleCachedExpression

protected Expressions.SimpleCachedExpression(java.lang.String typename,
                                             T value,
                                             java.lang.String... tags)

Method Detail

doEvaluation

protected Value doEvaluation(Env env,
                             java.lang.Object... args)

evaluate

public Value evaluate(Env env,
                      java.lang.Object... args)

Description copied from interface: Expression

Evaluates the expression using the specified environment and arguments. Arguments are additional context not provided by the environment.

Returns:

Evaluated value

hasValue

public boolean hasValue()

Description copied from interface: Expression

Returns whether the expression has already been evaluated to a Value

Specified by:

hasValue in interface Expression

Overrides:

hasValue in class Expressions.TypedExpression

Returns:

True if the expression is already evaluated