Parsing.java
/*-
* #%L
* io.earcam.instrumental.module.osgi
* %%
* Copyright (C) 2018 earcam
* %%
* SPDX-License-Identifier: (BSD-3-Clause OR EPL-1.0 OR Apache-2.0 OR MIT)
*
* You <b>must</b> choose to accept, in full - any individual or combination of
* the following licenses:
* <ul>
* <li><a href="https://opensource.org/licenses/BSD-3-Clause">BSD-3-Clause</a></li>
* <li><a href="https://www.eclipse.org/legal/epl-v10.html">EPL-1.0</a></li>
* <li><a href="https://www.apache.org/licenses/LICENSE-2.0">Apache-2.0</a></li>
* <li><a href="https://opensource.org/licenses/MIT">MIT</a></li>
* </ul>
* #L%
*/
package io.earcam.instrumental.module.jpms.parser;
import java.io.InputStream;
import java.nio.charset.Charset;
import org.antlr.v4.runtime.BailErrorStrategy;
import org.antlr.v4.runtime.CharStream;
import org.antlr.v4.runtime.CharStreams;
import org.antlr.v4.runtime.CommonTokenStream;
import org.antlr.v4.runtime.TokenStream;
import org.antlr.v4.runtime.tree.ParseTree;
import org.antlr.v4.runtime.tree.ParseTreeWalker;
import io.earcam.unexceptional.Exceptional;
final class Parsing {
private Parsing()
{}
private static Java9Parser parser(CharStream input)
{
Java9Lexer lexer = new Java9Lexer(input);
TokenStream tokens = new CommonTokenStream(lexer);
return new Java9Parser(tokens);
}
static Java9Parser failFastParserFor(String value)
{
Java9Parser parser = parser(CharStreams.fromString(value));
parser.setErrorHandler(new BailErrorStrategy());
return parser;
}
static Java9Parser failFastParserFor(InputStream value, Charset charset)
{
Java9Parser parser = parser(Exceptional.apply(CharStreams::fromStream, value, charset));
parser.setErrorHandler(new BailErrorStrategy());
return parser;
}
static void walk(ParseTree tree, AntlrParser listener)
{
ParseTreeWalker walker = new ParseTreeWalker();
walker.walk(listener, tree);
}
}