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Open source Reference Implementation of JSR-224: Java API for XML Web Services
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/*
 * Copyright (c) 2011, 2021 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0, which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

package com.sun.tools.ws.wscompile.plugin.at_generated;

import com.sun.codemodel.JAnnotatable;
import com.sun.codemodel.JAnnotationUse;
import com.sun.codemodel.JClass;
import com.sun.codemodel.JCodeModel;
import com.sun.codemodel.JDefinedClass;
import com.sun.codemodel.JPackage;
import com.sun.tools.ws.ToolVersion;
import com.sun.tools.ws.processor.model.Model;
import com.sun.tools.ws.wscompile.BadCommandLineException;
import com.sun.tools.ws.wscompile.ErrorReceiver;
import com.sun.tools.ws.wscompile.Options;
import com.sun.tools.ws.wscompile.Plugin;
import com.sun.tools.ws.wscompile.WsimportOptions;
import com.sun.tools.ws.wscompile.WsimportTool;
import java.io.IOException;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Iterator;
import org.xml.sax.SAXException;

/**
 * {@link Plugin} that marks the generated code by using '@Generated'.
 * It is based on a similar plugin in JAXB RI.
 *
 * @author Lukas Jungmann
 * @since 2.2.6
 */
public final class PluginImpl extends Plugin {

    private JClass annotation;
    private boolean noDate = false;
    private String genAnnotation = "jakarta.annotation.Generated";

    // cache the timestamp so that all the @Generated annotations match
    private String date = null;

    @Override
    public String getOptionName() {
        return "mark-generated";
    }

    @Override
    public String getUsage() {
        return "  -mark-generated                  mark the generated code as @jakarta.annotation.Generated\n"
             + "              -noDate              do not add date\n"
             + "              -Xann    generate  instead of @jakarta.annotation.Generated";
    }

    @Override
    public int parseArgument(Options opt, String[] args, int i) throws BadCommandLineException, IOException {
        if ("-noDate".equals(args[i])) {
            noDate = true;
            return 1;
        }
        if ("-Xann".equals(args[i])) {
            genAnnotation = opt.requireArgument("-Xann", args, ++i);
            return 2;
        }
        return 0;
    }

    @Override
    public boolean run(Model model, WsimportOptions wo, ErrorReceiver er) throws SAXException {
        JCodeModel cm = wo.getCodeModel();
        // we want this to work without requiring Jakarta annotations jar.
        annotation = cm.ref(genAnnotation);

        for (Iterator i = cm.packages(); i.hasNext();) {
            for (Iterator j = i.next().classes(); j.hasNext();) {
                annotateCls(j.next());
            }
        }

        return true;
    }

    private void annotateCls(JDefinedClass cls) {
        annotate(cls);
        //handle inner classes
        for (Iterator c = cls.classes(); c.hasNext();) {
            annotateCls(c.next());
        }
    }

    private void annotate(JAnnotatable m) {
        JAnnotationUse au = m.annotate(annotation)
                .param("value", WsimportTool.class.getName())
                .param("comments", ToolVersion.VERSION.BUILD_VERSION);
        if (!noDate) {
            au.param("date", getISO8601Date());
        }
    }

    /**
     * calculate the date value in ISO8601 format for the @Generated annotation
     * @return the date value
     */
    private String getISO8601Date() {
        if (date == null) {
            ZonedDateTime zdt = ZonedDateTime.now().withNano(0);
            date = zdt.format(DateTimeFormatter.ISO_OFFSET_DATE_TIME);
        }
        return date;
    }
}