/*******************************************************************************
 * Copyright (c) 2008, 2010 Obeo.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Obeo - initial API and implementation
 *******************************************************************************/
package org.eclipse.acceleo.module.example.uml2java.helios;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.eclipse.acceleo.engine.event.IAcceleoTextGenerationListener;
import org.eclipse.acceleo.engine.generation.strategy.DefaultStrategy;
import org.eclipse.acceleo.engine.generation.strategy.IAcceleoGenerationStrategy;
import org.eclipse.acceleo.engine.service.AbstractAcceleoGenerator;
import org.eclipse.emf.common.util.BasicMonitor;
import org.eclipse.emf.common.util.Monitor;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.uml2.uml.resource.UMLResource;

/**
 * Entry point of the 'GenerateJava' generation module.
 * 
 * @generated
 */
public class GenerateJava extends AbstractAcceleoGenerator {

	/**
	 * The name of the module.
	 * 
	 * @generated
	 */
	public static final String MODULE_FILE_NAME = "/org/eclipse/acceleo/module/example/uml2java/helios/generateJava";

	/**
	 * The name of the templates that are to be generated.
	 * 
	 * @generated
	 */
	public static final String[] TEMPLATE_NAMES = { "generateClass", "generateInterface" };

	/**
     * The list of properties files from the launch parameters (Launch configuration).
     *
     * @generated
     */
    private List<String> propertiesFiles = new ArrayList<String>();

  /**
	 * Allows the public constructor to be used. Note that a generator created this way cannot be used to
	 * launch generations before one of {@link #initialize(EObject, File, List)} or
	 * {@link #initialize(URI, File, List)} is called.
	 * <p>
	 * The main reason for this constructor is to allow clients of this generation to call it from another
	 * Java file, as it allows for the retrieval of {@link #getProperties()} and
	 * {@link #getGenerationListeners()}.
	 * </p>
	 * 
	 * @generated
	 */
	public GenerateJava() {
        // Empty implementation
    }

	/**
	 * Constructor.
	 * 
	 * @param modelURI
	 *            is the URI of the model.
	 * @param targetFolder
	 *            is the output folder
	 * @param arguments
	 *            are the other arguments
	 * @throws IOException
	 *             Thrown when the output cannot be saved.
	 * @generated
	 */
	public GenerateJava(URI modelURI, File targetFolder, List<? extends Object> arguments) throws IOException {
        initialize(modelURI, targetFolder, arguments);
    }

	/**
	 * Constructor.
	 * 
	 * @param model
	 *            is the root element of the model.
	 * @param targetFolder
	 *            is the output folder
	 * @param arguments
	 *            are the other arguments
	 * @throws IOException
	 *             Thrown when the output cannot be saved.
	 * @generated
	 */
	public GenerateJava(EObject model, File targetFolder, List<? extends Object> arguments)
			throws IOException {
        initialize(model, targetFolder, arguments);
    }

	/**
	 * Updates the registry used for looking up a package based namespace, in the resource set.
	 * 
	 * @param resourceSet
	 *            is the resource set
	 * @generated
	 */
	@Override
	public void registerPackages(ResourceSet resourceSet) {
        super.registerPackages(resourceSet);
        if (!isInWorkspace(org.eclipse.uml2.uml.UMLPackage.class)) {
            resourceSet.getPackageRegistry().put(org.eclipse.uml2.uml.UMLPackage.eINSTANCE.getNsURI(), org.eclipse.uml2.uml.UMLPackage.eINSTANCE);
        }
        
        /*
         * TODO If you need additional package registrations, you can register them here. The following line
         * (in comment) is an example of the package registration for UML. If you want to change the content
         * of this method, do NOT forget to change the "@generated" tag in the Javadoc of this method to
         * "@generated NOT". Without this new tag, any compilation of the Acceleo module with the main template
         * that has caused the creation of this class will revert your modifications. You can use the method
         * "isInWorkspace(Class c)" to check if the package that you are about to register is in the workspace.
         * To register a package properly, please follow the following conventions:
         * 
         * if (!isInWorkspace(UMLPackage.class)) {
         *     // The normal package registration if your metamodel is in a plugin.
         *     resourceSet.getPackageRegistry().put(UMLPackage.eNS_URI, UMLPackage.eINSTANCE);
         * } else {
         *     // The package registration that will be used if the metamodel is not deployed in a plugin.
         *     // This should be used if your metamodel is in your workspace and if you are using binary resource serialization.
         *     resourceSet.getPackageRegistry().put("/myproject/myfolder/mysubfolder/MyUMLMetamodel.ecore", UMLPackage.eINSTANCE);
         * }
         * 
         * To learn more about Package Registration, have a look at the Acceleo Launcher documentation (Help -> Help Contents).
         */
    }

	/**
	 * Updates the registry used for looking up resources factory in the given resource set.
	 * 
	 * @param resourceSet
	 *            The resource set that is to be updated.
	 * @generated NOT
	 */
	@Override
	public void registerResourceFactories(ResourceSet resourceSet) {
        super.registerResourceFactories(resourceSet);
        /*
         * TODO If you need additional resource factories registrations, you can register them here. the following line
         * (in comment) is an example of the resource factory registration for UML. If you want to change the content
         * of this method, do NOT forget to change the "@generated" tag in the Javadoc of this method to "@generated NOT".
         * Without this new tag, any compilation of the Acceleo module with the main template that has caused the creation
         * of this class will revert your modifications.
         * 
         * To learn more about the registration of Resource Factories, have a look at the Acceleo Launcher documentation (Help -> Help Contents). 
         */ 
        
        resourceSet.getResourceFactoryRegistry().getExtensionToFactoryMap().put(UMLResource.FILE_EXTENSION, UMLResource.Factory.INSTANCE);
    }

	/**
	 * The main method.
	 * 
	 * @param args
	 *            are the arguments
	 * @generated
	 */
	public static void main(String[] args) {
        try {
            if (args.length < 2) {
                System.out.println("Arguments not valid : {model, folder}.");
            } else {
                URI modelURI = URI.createFileURI(args[0]);
                File folder = new File(args[1]);
                
                List<String> arguments = new ArrayList<String>();
                
                /*
                 * Add in this list all the arguments used by the starting point of the generation
                 * If your main template is called on an element of your model and a String, you can
                 * add in "arguments" this "String" attribute.
                 */
                
                GenerateJava generator = new GenerateJava(modelURI, folder, arguments);
                
                /*
                 * Add the properties from the launch arguments.
                 * If you want to programmatically add new properties, add them in "propertiesFiles"
                 * You can add the absolute path of a properties files, or even a project relative path.
                 * If you want to add another "protocol" for your properties files, please override 
                 * "getPropertiesLoaderService(AcceleoService)" in order to return a new property loader.
                 * The behavior of the properties loader service is explained in the Acceleo documentation
                 * (Help -> Help Contents).
                 */
                 
                for (int i = 2; i < args.length; i++) {
                    generator.addPropertiesFile(args[i]);
                }
                
                generator.doGenerate(new BasicMonitor());
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

	/**
	 * Launches the generation.
	 * 
	 * @param monitor
	 *            This will be used to display progress information to the user.
	 * @throws IOException
	 *             Thrown when the output cannot be saved.
	 * @generated
	 */
	@Override
	public void doGenerate(Monitor monitor) throws IOException {
        /*
         * TODO if you wish to change the generation as a whole, override this. The default behavior should
         * be sufficient in most cases. If you want to change the content of this method, do NOT forget to
         * change the "@generated" tag in the Javadoc of this method to "@generated NOT". Without this new tag,
         * any compilation of the Acceleo module with the main template that has caused the creation of this
         * class will revert your modifications. If you encounter a problem with an unresolved proxy during the
         * generation, you can remove the comments in the following instructions to check for problems. Please
         * note that those instructions may have a significant impact on the performances.
         */

        //org.eclipse.emf.ecore.util.EcoreUtil.resolveAll(model);

        //if (model != null && model.eResource() != null) {
        //    List<org.eclipse.emf.ecore.resource.Resource.Diagnostic> errors = model.eResource().getErrors();
        //    for (org.eclipse.emf.ecore.resource.Resource.Diagnostic diagnostic : errors) {
        //        System.err.println(diagnostic.toString());
        //    }
        //}

        super.doGenerate(monitor);
    }

	/**
	 * If this generator needs to listen to text generation events, listeners can be returned from here.
	 * 
	 * @return List of listeners that are to be notified when text is generated through this launch.
	 * @generated
	 */
	@Override
	public List<IAcceleoTextGenerationListener> getGenerationListeners() {
        List<IAcceleoTextGenerationListener> listeners = super.getGenerationListeners();
        /*
         * TODO if you need to listen to generation event, add listeners to the list here. If you want to change
         * the content of this method, do NOT forget to change the "@generated" tag in the Javadoc of this method
         * to "@generated NOT". Without this new tag, any compilation of the Acceleo module with the main template
         * that has caused the creation of this class will revert your modifications.
         */
        return listeners;
    }

	/**
	 * If you need to change the way files are generated, this is your entry point.
	 * <p>
	 * The default is {@link org.eclipse.acceleo.engine.generation.strategy.DefaultStrategy}; it generates
	 * files on the fly. If you only need to preview the results, return a new
	 * {@link org.eclipse.acceleo.engine.generation.strategy.PreviewStrategy}. Both of these aren't aware of
	 * the running Eclipse and can be used standalone.
	 * </p>
	 * <p>
	 * If you need the file generation to be aware of the workspace (A typical example is when you wanna
	 * override files that are under clear case or any other VCS that could forbid the overriding), then
	 * return a new {@link org.eclipse.acceleo.engine.generation.strategy.WorkspaceAwareStrategy}.
	 * <b>Note</b>, however, that this <b>cannot</b> be used standalone.
	 * </p>
	 * <p>
	 * All three of these default strategies support merging through JMerge.
	 * </p>
	 */
	public IAcceleoGenerationStrategy getGenerationStrategy() {
		return new DefaultStrategy();
	}

	/**
	 * This will be called in order to find and load the module that will be launched through this launcher.
	 * We expect this name not to contain file extension, and the module to be located beside the launcher.
	 * 
	 * @return The name of the module that is to be launched.
	 * @generated
	 */
	@Override
	public String getModuleName() {
        return MODULE_FILE_NAME;
    }

	/**
	 * If the module(s) called by this launcher require properties files, return their qualified path from
	 * here.Take note that the first added properties files will take precedence over subsequent ones if they
	 * contain conflicting keys.
	 * <p>
	 * Properties need to be in source folders, the path that we expect to get as a result of this call are of
	 * the form &lt;package>.&lt;properties file name without extension>. For example, if you have a file
	 * named "messages.properties" in package "org.eclipse.acceleo.sample", the path that needs be returned by
	 * a call to {@link #getProperties()} is "org.eclipse.acceleo.sample.messages".
	 * </p>
	 * 
	 * @return The list of properties file we need to add to the generation context.
	 * @see java.util.ResourceBundle#getBundle(String)
	 * @generated
	 */
	@Override
	public List<String> getProperties() {
        /*
         * TODO if your generation module requires access to properties files, add their qualified path to the list here.
         * Properties files are expected to be in source folders, and the path here to be the qualified path as if referring
         * to a Java class. For example, if you have a file named "messages.properties" in package "org.eclipse.acceleo.sample",
         * the path that needs be added to this list is "/org/eclipse/acceleo/sample/messages.properties". If you want to change the
         * contentof this method, do NOT forget to change the "@generated" tag in the Javadoc of this method to "@generated NOT".
         * Without this new tag, any compilation of the Acceleo module with the main template that has caused the creation of 
         * this class will revert your modifications.
         * 
         * To learn more about Properties Files, have a look at the Acceleo Launcher documentation (Help -> Help Contents).
         */
        return propertiesFiles;
    }

	/**
     * Adds a properties file in the list of properties files.
     * 
     * @param propertiesFile
     *            The properties file to add.
     * @generated
     * @since 3.1
     */
    @Override
    public void addPropertiesFile(String propertiesFile) {
        this.propertiesFiles.add(propertiesFile);
    }

  /**
	 * This will be used to get the list of templates that are to be launched by this launcher.
	 * 
	 * @return The list of templates to call on the module {@link #getModuleName()}.
	 * @generated
	 */
	@Override
	public String[] getTemplateNames() {
        return TEMPLATE_NAMES;
    }

}