Java example source code file (T6423583.java)

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Java - Java tags/keywords

abstractprocessor, assertionerror, class, override, roundenvironment, sourceversion, string, supportedannotationtypes, t6423583, test, trees, treescanner, typeelement, util, void

The T6423583.java Java example source code

/*
 * Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * @test
 * @bug 6423583
 * @summary LiteralTree.getValue() should return Boolean for Kind.BOOLEAN_LITERAL literals
 * @build T6423583
 * @compile -proc:only -processor T6423583 T6423583.java
 */

import java.util.*;
import javax.annotation.processing.*;
import javax.lang.model.*;
import javax.lang.model.element.*;
import com.sun.source.tree.*;
import com.sun.source.util.*;

@SupportedAnnotationTypes("*")
public class T6423583 extends AbstractProcessor {
    boolean b1 = true;
    boolean b2 = false;
    String s = "s";
    char c = 'c';
    int i = 0;
    long l = 0l;
    float f = 0f;
    double d = 0d;
    Void v = null;

    public boolean process(Set<? extends TypeElement> annos, RoundEnvironment rEnv) {
        Trees trees = Trees.instance(processingEnv);
        Test test = new Test();
        for (Element e: rEnv.getRootElements()) {
            Tree t = trees.getTree(e);
            test.scan(t, null);
        }
        return true;
    }

    @Override
    public SourceVersion getSupportedSourceVersion() {
        return SourceVersion.latest();
    }

    private static class Test extends TreeScanner<Void,Void> {

        private static Map<Tree.Kind, Class> map = new HashMap();
        static {
            map.put(Tree.Kind.BOOLEAN_LITERAL, Boolean.class);
            map.put(Tree.Kind.CHAR_LITERAL, Character.class);
            map.put(Tree.Kind.STRING_LITERAL, String.class);
            map.put(Tree.Kind.INT_LITERAL, Integer.class);
            map.put(Tree.Kind.LONG_LITERAL, Long.class);
            map.put(Tree.Kind.FLOAT_LITERAL, Float.class);
            map.put(Tree.Kind.DOUBLE_LITERAL, Double.class);
        }

        public Void visitLiteral(LiteralTree tree, Void ignore) {
            System.err.println(tree);
            Class expect = map.get(tree.getKind());
            if (!check(tree.getValue(), expect)) {
                System.err.println("tree: " + tree);
                System.err.println("expected class: " + expect);
                if (tree.getValue() != null)
                    System.err.println("actual class: " + tree.getValue().getClass());
                throw new AssertionError("unexpected value for literal");
            }
            return null;
        }

        private boolean check(Object value, Class<?> expectedClass) {
            return (value == null ? expectedClass == null : value.getClass().equals(expectedClass));
        }
    }
}