subprojects/parser-antlr4/src/main/java/org/apache/groovy/parser/antlr4/Antlr4ParserPlugin.java

/*
 *  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.
 */
package org.apache.groovy.parser.antlr4;

import org.codehaus.groovy.GroovyBugError;
import org.codehaus.groovy.ast.ModuleNode;
import org.codehaus.groovy.control.CompilerConfiguration;
import org.codehaus.groovy.control.ParserPlugin;
import org.codehaus.groovy.control.SourceUnit;
import org.codehaus.groovy.control.io.StringReaderSource;
import org.codehaus.groovy.runtime.IOGroovyMethods;
import org.codehaus.groovy.syntax.Reduction;

import java.io.IOException;
import java.io.Reader;
import java.util.Optional;

/**
 * A parser plugin for the new parser.
 */
public class Antlr4ParserPlugin implements ParserPlugin {

    private final CompilerConfiguration compilerConfiguration;

    public Antlr4ParserPlugin() {
        this.compilerConfiguration = null;
    }

    @Deprecated
    public Antlr4ParserPlugin(final CompilerConfiguration compilerConfiguration) {
        this.compilerConfiguration = compilerConfiguration;
    }

    @Override
    public Reduction parseCST(final SourceUnit sourceUnit, final Reader reader) {
        if (!sourceUnit.getSource().canReopenSource()) {
            try {
                sourceUnit.setSource(new StringReaderSource(
                        IOGroovyMethods.getText(reader),
                        sourceUnit.getConfiguration()
                ));
            } catch (IOException e) {
                throw new GroovyBugError("Failed to create StringReaderSource", e);
            }
        }
        return null;
    }

    @Override
    public ModuleNode buildAST(final SourceUnit sourceUnit, final ClassLoader classLoader, final Reduction cst) {
        CompilerConfiguration compilerConfiguration = Optional.ofNullable(this.compilerConfiguration).orElseGet(sourceUnit::getConfiguration);
        AstBuilder builder = new AstBuilder(sourceUnit, compilerConfiguration.isGroovydocEnabled(), compilerConfiguration.isRuntimeGroovydocEnabled());
        return builder.buildAST();
    }
}