edu.nyu.jet.pat

Class StringExpression

java.lang.Object

edu.nyu.jet.pat.StringExpression

public class StringExpression
extends Object

a sequence of strings and variables, used as the argument to the "print" and "write" actions.

Constructor Summary

Constructors

Constructor and Description
StringExpression(StreamTokenizer tok) creates a new StringExpression from the input read by StreamTokenizer tok, which should consist of a sequence of strings and variable names, separated by "+".

Method Summary

Methods

Modifier and Type	Method and Description
String	evaluate(Document doc, PatternApplication patap) evaluates the StringExpression at the time when print or write action is performed.
String	toString() produces a printable form of the StringExpression, consisting of the elements of the expression, separated by "+".

Methods inherited from class java.lang.Object

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

Constructor Detail

StringExpression

public StringExpression(StreamTokenizer tok)
                 throws IOException,
                        PatternSyntaxError

creates a new StringExpression from the input read by StreamTokenizer tok, which should consist of a sequence of strings and variable names, separated by "+".

Throws:

IOException

PatternSyntaxError

Method Detail

evaluate

public String evaluate(Document doc,
              PatternApplication patap)

evaluates the StringExpression at the time when print or write action is performed. Returns the concatenation of the elements of the StringExpression. The value of each variable element should be a Span or Annotation, and is interpreted as the text subsumed by the Span or Annotation.

toString

public String toString()

produces a printable form of the StringExpression, consisting of the elements of the expression, separated by "+".

Overrides:

toString in class Object