org.antlr.v4.codegen.model.ListenerFile Maven / Gradle / Ivy
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With inspiration from other libraries
/*
* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
* Use of this file is governed by the BSD 3-clause license that
* can be found in the LICENSE.txt file in the project root.
*/
package org.antlr.v4.codegen.model;
import org.antlr.v4.codegen.OutputModelFactory;
import org.antlr.v4.runtime.misc.Pair;
import org.antlr.v4.tool.Grammar;
import org.antlr.v4.tool.Rule;
import org.antlr.v4.tool.ast.ActionAST;
import org.antlr.v4.tool.ast.AltAST;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
/** A model object representing a parse tree listener file.
* These are the rules specific events triggered by a parse tree visitor.
*/
public class ListenerFile extends OutputFile {
public String genPackage; // from -package cmd-line
public String accessLevel; // from -DaccessLevel cmd-line
public String exportMacro; // from -DexportMacro cmd-line
public String grammarName;
public String parserName;
/**
* The names of all listener contexts.
*/
public Set listenerNames = new LinkedHashSet();
/**
* For listener contexts created for a labeled outer alternative, maps from
* a listener context name to the name of the rule which defines the
* context.
*/
public Map listenerLabelRuleNames = new LinkedHashMap();
@ModelElement public Action header;
@ModelElement public Map namedActions;
public ListenerFile(OutputModelFactory factory, String fileName) {
super(factory, fileName);
Grammar g = factory.getGrammar();
parserName = g.getRecognizerName();
grammarName = g.name;
namedActions = buildNamedActions(factory.getGrammar());
for (Rule r : g.rules.values()) {
Map>> labels = r.getAltLabels();
if ( labels!=null ) {
for (Map.Entry>> pair : labels.entrySet()) {
listenerNames.add(pair.getKey());
listenerLabelRuleNames.put(pair.getKey(), r.name);
}
}
else {
// only add rule context if no labels
listenerNames.add(r.name);
}
}
ActionAST ast = g.namedActions.get("header");
if ( ast!=null ) header = new Action(factory, ast);
genPackage = g.tool.genPackage;
accessLevel = g.getOptionString("accessLevel");
exportMacro = g.getOptionString("exportMacro");
}
}