javaparser-testing/src/test/java/com/github/javaparser/wiki_samples/MethodChanger_1.java

/*
 * Copyright (C) 2007-2010 Júlio Vilmar Gesser.
 * Copyright (C) 2011, 2013-2016 The JavaParser Team.
 *
 * This file is part of JavaParser.
 *
 * JavaParser can be used either under the terms of
 * a) the GNU Lesser General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 * b) the terms of the Apache License
 *
 * You should have received a copy of both licenses in LICENCE.LGPL and
 * LICENCE.APACHE. Please refer to those files for details.
 *
 * JavaParser is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 */

package com.github.javaparser.wiki_samples;

import com.github.javaparser.JavaParser;
import com.github.javaparser.ast.CompilationUnit;
import com.github.javaparser.ast.body.MethodDeclaration;
import com.github.javaparser.ast.visitor.VoidVisitorAdapter;

import java.io.File;

public class MethodChanger_1 {

    public static void main(String[] args) throws Exception {
        // parse a file
        CompilationUnit cu = JavaParser.parse(new File("test.java"));

        // visit and change the methods names and parameters
        cu.accept(new MethodChangerVisitor(), null);

        // prints the changed compilation unit
        System.out.println(cu);
    }

    /**
     * Simple visitor implementation for visiting MethodDeclaration nodes.
     */
    private static class MethodChangerVisitor extends VoidVisitorAdapter<Void> {
        @Override
        public void visit(MethodDeclaration n, Void arg) {
            // change the name of the method to upper case
            n.setName(n.getNameAsString().toUpperCase());

            // add a new parameter to the method
            n.addParameter("int", "value");
        }
    }
}