com.nokia.tools.vct.cli.CommandLineUtils.java Source code

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Here is the source code for com.nokia.tools.vct.cli.CommandLineUtils.java

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/*
 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 
 * All rights reserved.
 * This component and the accompanying materials are made available
 * under the terms of "Eclipse Public License v1.0"
 * which accompanies this distribution, and is available
 * at the URL "http://www.eclipse.org/legal/epl-v10.html".
 * 
 * Initial Contributors:
 * Nokia Corporation - Initial contribution
 * 
 * Contributors:
 * 
 * Description: This file is part of com.nokia.tools.vct.cli component.
 */

package com.nokia.tools.vct.cli;

import java.util.ArrayList;
import java.util.List;

import org.apache.commons.cli.Option;
import org.apache.commons.cli.OptionGroup;
import org.apache.commons.cli.Options;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtension;
import org.eclipse.core.runtime.IExtensionRegistry;
import org.eclipse.core.runtime.Platform;

public class CommandLineUtils {
    static final String EXTENSION_NAMESPACE = "com.nokia.tools.vct.cli.commandline";
    static final String ELEMENT_HANDLER = "handler";
    static final String ELEMENT_OPTION = "option";
    static final String ELEMENT_OPTION_GROUP = "optionGroup";
    static final String HANDLER_ATTR_CLASS = "class";
    static final String HANDLER_ATTR_APPLICATION_ID = "applicationId";
    static final String OPTION_ATTR_LONG_NAME = "longName";
    static final String OPTION_ATTR_SHORT_NAME = "shortName";
    static final String OPTION_ATTR_HAS_ARG = "hasArg";
    static final String OPTION_ATTR_DESCRIPTION = "description";

    static final String OPTION_GROUP_ATTR_REQUIRED = "required";

    public static void initOptions(Options options) {
        IExtensionRegistry registry = Platform.getExtensionRegistry();

        IExtension[] extensions = registry.getExtensionPoint(EXTENSION_NAMESPACE).getExtensions();
        for (IExtension extension : extensions) {
            for (IConfigurationElement element : extension.getConfigurationElements()) {
                if (ELEMENT_OPTION.equals(element.getName())) {
                    Option option = makeOption(element);
                    options.addOption(option);
                } else if (ELEMENT_OPTION_GROUP.equals(element.getName())) {
                    OptionGroup optionGroup = new OptionGroup();
                    boolean required = Boolean.TRUE.equals(element.getAttribute(OPTION_GROUP_ATTR_REQUIRED));
                    optionGroup.setRequired(required);
                    for (IConfigurationElement element2 : element.getChildren(ELEMENT_OPTION)) {
                        Option option = makeOption(element2);
                        optionGroup.addOption(option);
                    }
                    options.addOptionGroup(optionGroup);
                }
            }
        }
    }

    public static List<ICommandLineHandler> getHandlers(String applicationId) {
        IExtensionRegistry registry = Platform.getExtensionRegistry();
        List<ICommandLineHandler> handlers = new ArrayList<ICommandLineHandler>();

        IExtension[] extensions = registry.getExtensionPoint(EXTENSION_NAMESPACE).getExtensions();
        for (IExtension extension : extensions) {
            for (IConfigurationElement element : extension.getConfigurationElements()) {
                if (ELEMENT_HANDLER.equals(element.getName())) {
                    Object exec;
                    try {
                        exec = element.createExecutableExtension(HANDLER_ATTR_CLASS);
                        if (exec instanceof ICommandLineHandler) {
                            String applicationIdAttr = element.getAttribute(HANDLER_ATTR_APPLICATION_ID);
                            // check for applicationId
                            if (applicationIdAttr != null && applicationIdAttr.equals(applicationId)) {
                                handlers.add((ICommandLineHandler) exec);
                            }
                        }
                    } catch (CoreException e) {

                        e.printStackTrace();
                    }
                }
            }
        }
        return handlers;
    }

    private static Option makeOption(IConfigurationElement element) {
        String longName = element.getAttribute(OPTION_ATTR_LONG_NAME);
        String shortName = element.getAttribute(OPTION_ATTR_SHORT_NAME);
        String description = element.getAttribute(OPTION_ATTR_DESCRIPTION);
        boolean hasArg = Boolean.TRUE.equals(element.getAttribute(OPTION_ATTR_HAS_ARG));

        Option option = new Option(shortName, longName, hasArg, description);
        return option;
    }
}