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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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package com.sun.tools.internal.xjc;

import java.io.IOException;
import java.util.Collections;
import java.util.List;

import com.sun.tools.internal.xjc.generator.bean.field.FieldRendererFactory;
import com.sun.tools.internal.xjc.model.CPluginCustomization;
import com.sun.tools.internal.xjc.model.Model;
import com.sun.tools.internal.xjc.outline.Outline;

import org.xml.sax.ErrorHandler;
import org.xml.sax.SAXException;


Add-on that works on the generated source code.


This add-on will be called after the default bean generation
has finished.

Author:
    Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
Since:
     JAXB RI 2.0 EA
/**
 * Add-on that works on the generated source code.
 *
 * <p>
 * This add-on will be called after the default bean generation
 * has finished.
 *
 * @author
 *     Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
 *
 * @since
 *      JAXB RI 2.0 EA
 */
public abstract class Plugin {

    
Gets the option name to turn on this add-on.

 For example, if "abc" is returned, "-abc" will turn on this plugin. A plugin needs to be turned on explicitly, or else no other methods of Plugin will be invoked. 
 Starting 2.1, when an option matches the name returned from this method, XJC will then invoke parseArgument(Options, String[], int), allowing plugins to handle arguments to this option. 
/**
     * Gets the option name to turn on this add-on.
     *
     * <p>
     * For example, if "abc" is returned, "-abc" will
     * turn on this plugin. A plugin needs to be turned
     * on explicitly, or else no other methods of {@link Plugin}
     * will be invoked.
     *
     * <p>
     * Starting 2.1, when an option matches the name returned
     * from this method, XJC will then invoke {@link #parseArgument(Options, String[], int)},
     * allowing plugins to handle arguments to this option.
     */
    public abstract String getOptionName();

    
Gets the description of this add-on. Used to generate
a usage screen.

Returns:
     localized description message. should be terminated by \n.
/**
     * Gets the description of this add-on. Used to generate
     * a usage screen.
     *
     * @return
     *      localized description message. should be terminated by \n.
     */
    public abstract String getUsage();

    
Parses an option args[i] and augment
the opt object appropriately, then return
the number of tokens consumed.


The callee doesn't need to recognize the option that the
getOptionName method returns.


Once a plugin is activated, this method is called
for options that XJC didn't recognize. This allows
a plugin to define additional options to customize
its behavior.

 Since options can appear in no particular order, XJC allows sub-options of a plugin to show up before the option that activates a plugin (one that's returned by getOptionName(). But nevertheless a Plugin needs to be activated to participate in further processing. 
Throws:
  • BadCommandLineException – 
     If the option was recognized but there's an error.
     This halts the argument parsing process and causes
     XJC to abort, reporting an error.
Returns:
     0 if the argument is not understood.
     Otherwise return the number of tokens that are
     consumed, including the option itself.
     (so if you have an option like "-foo 3", return 2.)
/**
     * Parses an option <code>args[i]</code> and augment
     * the <code>opt</code> object appropriately, then return
     * the number of tokens consumed.
     *
     * <p>
     * The callee doesn't need to recognize the option that the
     * getOptionName method returns.
     *
     * <p>
     * Once a plugin is activated, this method is called
     * for options that XJC didn't recognize. This allows
     * a plugin to define additional options to customize
     * its behavior.
     *
     * <p>
     * Since options can appear in no particular order,
     * XJC allows sub-options of a plugin to show up before
     * the option that activates a plugin (one that's returned
     * by {@link #getOptionName()}.
     *
     * But nevertheless a {@link Plugin} needs to be activated
     * to participate in further processing.
     *
     * @return
     *      0 if the argument is not understood.
     *      Otherwise return the number of tokens that are
     *      consumed, including the option itself.
     *      (so if you have an option like "-foo 3", return 2.)
     * @exception BadCommandLineException
     *      If the option was recognized but there's an error.
     *      This halts the argument parsing process and causes
     *      XJC to abort, reporting an error.
     */
    public int parseArgument( Options opt, String[] args, int i ) throws BadCommandLineException, IOException {
        return 0;
    }

    
Returns the list of namespace URIs that are supported by this plug-in
as schema annotations.


If a plug-in returns a non-empty list, the JAXB RI will recognize
these namespace URIs as vendor extensions
(much like "http://java.sun.com/xml/ns/jaxb/xjc"). This allows users
to write those annotations inside a schema, or in external binding files,
and later plug-ins can access those annotations as DOM nodes.


See 
http://java.sun.com/webservices/docs/1.5/jaxb/vendorCustomizations.html
for the syntax that users need to use to enable extension URIs.

Returns:
     can be empty, be never be null.
/**
     * Returns the list of namespace URIs that are supported by this plug-in
     * as schema annotations.
     *
     * <p>
     * If a plug-in returns a non-empty list, the JAXB RI will recognize
     * these namespace URIs as vendor extensions
     * (much like "http://java.sun.com/xml/ns/jaxb/xjc"). This allows users
     * to write those annotations inside a schema, or in external binding files,
     * and later plug-ins can access those annotations as DOM nodes.
     *
     * <p>
     * See <a href="http://java.sun.com/webservices/docs/1.5/jaxb/vendorCustomizations.html">
     * http://java.sun.com/webservices/docs/1.5/jaxb/vendorCustomizations.html</a>
     * for the syntax that users need to use to enable extension URIs.
     *
     * @return
     *      can be empty, be never be null.
     */
    public List<String> getCustomizationURIs() {
        return Collections.emptyList();
    }

    
Checks if the given tag name is a valid tag name for the customization element in this plug-in.


This method is invoked by XJC to determine if the user-specified customization element
is really a customization or not. This information is used to pick the proper error message.

 A plug-in is still encouraged to do the validation of the customization element in the run method before using any CPluginCustomization, to make sure that it has proper child elements and attributes. 
Params:
  • nsUri – 
     the namespace URI of the element. Never null.
  • localName – 
     the local name of the element. Never null.
/**
     * Checks if the given tag name is a valid tag name for the customization element in this plug-in.
     *
     * <p>
     * This method is invoked by XJC to determine if the user-specified customization element
     * is really a customization or not. This information is used to pick the proper error message.
     *
     * <p>
     * A plug-in is still encouraged to do the validation of the customization element in the
     * {@link #run} method before using any {@link CPluginCustomization}, to make sure that it
     * has proper child elements and attributes.
     *
     * @param nsUri
     *      the namespace URI of the element. Never null.
     * @param localName
     *      the local name of the element. Never null.
     */
    public boolean isCustomizationTagName(String nsUri,String localName) {
        return false;
    }

    
Notifies a plugin that it's activated.

 This method is called when a plugin is activated through the command line option (as specified by getOptionName(). 
 This is a good opportunity to use Options.setFieldRendererFactory(FieldRendererFactory, Plugin) if a plugin so desires. 

Noop by default.

Since:JAXB 2.0 EA4
/**
     * Notifies a plugin that it's activated.
     *
     * <p>
     * This method is called when a plugin is activated
     * through the command line option (as specified by {@link #getOptionName()}.
     *
     * <p>
     * This is a good opportunity to use
     * {@link Options#setFieldRendererFactory(FieldRendererFactory, Plugin)}
     * if a plugin so desires.
     *
     * <p>
     * Noop by default.
     *
     * @since JAXB 2.0 EA4
     */
    public void onActivated(Options opts) throws BadCommandLineException {
        // noop
    }

    
Performs the post-processing of the Model. 

This method is invoked after XJC has internally finished
the model construction. This is a chance for a plugin to
affect the way code generation is performed.

 Compared to the run(Outline, Options, ErrorHandler) method, this method allows a plugin to work at the higher level conceptually closer to the abstract JAXB model, as opposed to Java syntax level. 
 Note that this method is invoked only when a Plugin is activated. 
Params:
  • model – 
     The object that represents the classes/properties to
     be generated.
  • errorHandler – 
     Errors should be reported to this handler.
Since:JAXB 2.0.2
/**
     * Performs the post-processing of the {@link Model}.
     *
     * <p>
     * This method is invoked after XJC has internally finished
     * the model construction. This is a chance for a plugin to
     * affect the way code generation is performed.
     *
     * <p>
     * Compared to the {@link #run(Outline, Options, ErrorHandler)}
     * method, this method allows a plugin to work at the higher level
     * conceptually closer to the abstract JAXB model, as opposed to
     * Java syntax level.
     *
     * <p>
     * Note that this method is invoked only when a {@link Plugin}
     * is activated.
     *
     * @param model
     *      The object that represents the classes/properties to
     *      be generated.
     *
     * @param errorHandler
     *      Errors should be reported to this handler.
     *
     * @since JAXB 2.0.2
     */
    public void postProcessModel(Model model, ErrorHandler errorHandler) {
        // noop
    }

    
Run the add-on.

 This method is invoked after XJC has internally finished the code generation. Plugins can tweak some of the generated code (or add more code) by using Outline and Options. 
 Note that this method is invoked only when a Plugin is activated. 
Params:
  • outline – 
     This object allows access to various generated code.
  • errorHandler – 
     Errors should be reported to this handler.
Throws:
  • SAXException –  After an error is reported to ErrorHandler, the same exception can be thrown to indicate a fatal irrecoverable error. ErrorHandler itself may throw it, if it chooses not to recover from the error.
Returns:
     If the add-on executes successfully, return true.
     If it detects some errors but those are reported and
     recovered gracefully, return false.
/**
     * Run the add-on.
     *
     * <p>
     * This method is invoked after XJC has internally finished
     * the code generation. Plugins can tweak some of the generated
     * code (or add more code) by using {@link Outline} and {@link Options}.
     *
     * <p>
     * Note that this method is invoked only when a {@link Plugin}
     * is activated.
     *
     * @param outline
     *      This object allows access to various generated code.
     *
     * @param errorHandler
     *      Errors should be reported to this handler.
     *
     * @return
     *      If the add-on executes successfully, return true.
     *      If it detects some errors but those are reported and
     *      recovered gracefully, return false.
     *
     * @throws SAXException
     *      After an error is reported to {@link ErrorHandler}, the
     *      same exception can be thrown to indicate a fatal irrecoverable
     *      error. {@link ErrorHandler} itself may throw it, if it chooses
     *      not to recover from the error.
     */
    public abstract boolean run(
        Outline outline, Options opt, ErrorHandler errorHandler ) throws SAXException ;
}