apt/Scanners/Counter.java

/*
 * Copyright (c) 2004, 2007, 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.
 */


import com.sun.mirror.apt.*;
import com.sun.mirror.declaration.*;
import com.sun.mirror.type.*;
import com.sun.mirror.util.*;

import java.util.Collection;
import java.util.Set;
import java.util.Arrays;

import static java.util.Collections.*;
import static com.sun.mirror.util.DeclarationVisitors.*;

/*
 * Used to verify counts from different kinds of declaration scanners.
 */
public class Counter implements AnnotationProcessorFactory {
    static class CounterProc implements AnnotationProcessor {
        static class CountingVisitor extends SimpleDeclarationVisitor {
            int count;
            int count() {
                return count;
            }

            CountingVisitor() {
                count = 0;
            }

            public void visitDeclaration(Declaration d) {
                count++;
                System.out.println(d.getSimpleName());
            }
        }

        AnnotationProcessorEnvironment env;
        CounterProc(AnnotationProcessorEnvironment env) {
            this.env = env;
        }

        public void process() {
            for(TypeDeclaration td: env.getSpecifiedTypeDeclarations() ) {
                CountingVisitor sourceOrder = new CountingVisitor();
                CountingVisitor someOrder = new CountingVisitor();

                System.out.println("Source Order Scanner");
                td.accept(getSourceOrderDeclarationScanner(sourceOrder,
                                                           NO_OP));

                System.out.println("\nSome Order Scanner");
                td.accept(getDeclarationScanner(someOrder,
                                                NO_OP));

                if (sourceOrder.count() != someOrder.count() )
                    throw new RuntimeException("Counts from different scanners don't agree");
            }

        }
    }

    static Collection<String> supportedTypes;
    static {
        String types[] = {"*"};
        supportedTypes = unmodifiableCollection(Arrays.asList(types));
    }

    static Collection<String> supportedOptions;
    static {
        String options[] = {""};
        supportedOptions = unmodifiableCollection(Arrays.asList(options));
    }

    public Collection<String> supportedOptions() {
        return supportedOptions;
    }

    public Collection<String> supportedAnnotationTypes() {
        return supportedTypes;
    }

    public AnnotationProcessor getProcessorFor(Set<AnnotationTypeDeclaration> atds,
                                               AnnotationProcessorEnvironment env) {
        return new CounterProc(env);
    }

}