org.codehaus.mojo.antlr.metadata.XRef Maven / Gradle / Ivy

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Maven Plugin for Antlr v2
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package org.codehaus.mojo.antlr.metadata;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.util.LinkedHashMap;
import java.util.Map;
import java.util.HashMap;
import java.util.Iterator;

/**
 * TODO : javadoc
 * 
 * @author Steve Ebersole
 */
public class XRef {
    private final Object antlrHierarchy;

    private LinkedHashMap filesById = new LinkedHashMap<>();
    private Map filesByExportVocab = new HashMap<>();
    private Map filesByClassName = new HashMap<>();

    public XRef(Object antlrHierarchy) {
        this.antlrHierarchy = antlrHierarchy;
    }

    public Object getAntlrHierarchy() {
        return antlrHierarchy;
    }

    void addGrammarFile(GrammarFile grammarFile) {
        filesById.put(grammarFile.getId(), grammarFile);
        
        for (Grammar grammar : grammarFile.getGrammars()) {
            filesByClassName.put(grammar.getClassName(), grammarFile);
            if (grammar.getExportVocab() != null) {
                GrammarFile old = filesByExportVocab.put(grammar.getExportVocab(), grammarFile);
                if (old != null && old != grammarFile) {
                    System.out.println("[WARNING] : multiple grammars defined the same exportVocab : " + grammar.getExportVocab());
                }
            }
        }
    }

    public Iterator iterateGrammarFiles() {
        return filesById.values().iterator();
    }

    public GrammarFile getGrammarFileById(String id) {
        return (GrammarFile) filesById.get(id);
    }

    public GrammarFile getGrammarFileByClassName(String className) {
        return (GrammarFile) filesByClassName.get(className);
    }

    public GrammarFile getGrammarFileByExportVocab(String exportVocab) {
        return (GrammarFile) filesByExportVocab.get(exportVocab);
    }
}