FormBuilder.java

package nl.uva.softwcons.ql;

import java.io.IOException;
import java.io.InputStream;

import nl.uva.softwcons.generated.QLLexer;
import nl.uva.softwcons.generated.QLParser;
import nl.uva.softwcons.ql.ast.ASTBuilderQL;
import nl.uva.softwcons.ql.ast.form.Form;

import org.antlr.v4.runtime.ANTLRInputStream;
import org.antlr.v4.runtime.CommonTokenStream;
import org.antlr.v4.runtime.tree.ParseTree;

public final class FormBuilder {
    private FormBuilder() {
    }

    public static Form build(final String input) {
        return parseForm(new ANTLRInputStream(input));
    }

    public static Form build(final InputStream input) throws IOException {
        return parseForm(new ANTLRInputStream(input));
    }

    private static Form parseForm(final ANTLRInputStream input) {
        final QLLexer lexer = new QLLexer(input);
        final QLParser parser = new QLParser(new CommonTokenStream(lexer));
        final ParseTree tree = parser.form();

        return (Form) new ASTBuilderQL().visit(tree);
    }

}