package org.gradle.api.plugins.antlr.internal.antlr2;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

/**
 * Models information about an Antlr grammar file, including the individual {@link #getGrammars grammars} (lexers,
 * parsers, etc) contained within it.
 */
public class GrammarFileMetadata {
    private final File filePath;
    private final antlr.preprocessor.GrammarFile antlrGrammarFile;

    void addGrammarFile(GrammarFileMetadata grammarFileMetadata) {
        filesByPath.put(grammarFileMetadata.getFilePath().getPath(), grammarFileMetadata);
        for (GrammarMetadata grammarMetadata : grammarFileMetadata.getGrammars()) {
            filesByClassName.put(grammarMetadata.getClassName(), grammarFileMetadata);

        GenerationPlan generationPlan = new GenerationPlan(grammarFileMetadata.getFilePath(), generationDirectory);

        for (GrammarMetadata grammarMetadata : grammarFileMetadata.getGrammars()) {
            final File generatedParserFile = new File(outputDirectory, grammarMetadata.determineGeneratedParserPath());

            if (!generatedParserFile.exists()) {
                generationPlan.markOutOfDate();

        List<GrammarDelegate> grammarDelegates = new ArrayList<GrammarDelegate>();
        Enumeration<?> grammarFileGrammars = antlrGrammarFile.getGrammars().elements();
        while (grammarFileGrammars.hasMoreElements()) {
            grammarDelegates.add(new GrammarDelegate(grammarFileGrammars.nextElement()));
        }
        return grammarDelegates;
    }