com.github.chrisbrenton.grappa.parsetree.listeners

Class ParseNodeConstructorRepository

java.lang.Object

com.github.chrisbrenton.grappa.parsetree.listeners.ParseNodeConstructorRepository

public final class ParseNodeConstructorRepository
extends java.lang.Object

A class to collect all constructors for parse nodes defined in a parser

This class takes a parser class as an argument and will look up all the rules (methods returning a Rule. If a rule is further annotated with GenerateNode, it will take the argument to this annotation and find a suitable constructor.

The constructor must obey two criteria:

• it must be public,
• it must take two arguments: a String (the text matched by the node) and a List of ParseNodes (its children nodes).

Furthermore, it will associate the found constructor with a rule label; it is either the method name or, if the rule is further annotated with Label, then the value of this annotation.

It is illegal for two rules to have the same label: should that happen, an IllegalStateException is thrown.

See Also:

ParseNode, ParseTreeListener.ParseTreeListener(ParseNodeConstructorRepository)

Constructor Summary

Constructors

Constructor and Description
ParseNodeConstructorRepository(java.lang.Class<? extends com.github.fge.grappa.parsers.BaseParser<?>> parserClass) Constructor

Method Summary

Modifier and Type	Method and Description
java.lang.reflect.Constructor<? extends ParseNode>	getNodeConstructor(java.lang.String ruleName) Get the constructor for a given parse node class

Methods inherited from class java.lang.Object

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

Constructor Detail

ParseNodeConstructorRepository

public ParseNodeConstructorRepository(java.lang.Class<? extends com.github.fge.grappa.parsers.BaseParser<?>> parserClass)

Constructor

Parameters:

parserClass - the parser class

Method Detail

getNodeConstructor

public java.lang.reflect.Constructor<? extends ParseNode> getNodeConstructor(java.lang.String ruleName)

Get the constructor for a given parse node class

Parameters:

ruleName - the name of the rule

Returns:

the constructor; null if not found