CommandBuilder.java

/*
 * Copyright 2013 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.kie.workbench.common.widgets.client.callbacks;

import java.util.HashMap;
import java.util.Map;

import com.google.gwt.user.client.ui.IsWidget;
import org.kie.workbench.common.services.shared.source.SourceGenerationFailedException;
import org.kie.workbench.common.widgets.client.resources.i18n.CommonConstants;
import org.kie.workbench.common.widgets.client.source.ViewDRLSourceWidget;
import org.kie.workbench.common.widgets.client.widget.NoSuchFileWidget;
import org.uberfire.client.callbacks.Callback;
import org.uberfire.client.workbench.widgets.multipage.MultiPageEditor;
import org.uberfire.commons.validation.PortablePreconditions;
import org.uberfire.ext.widgets.common.client.common.HasBusyIndicator;
import org.uberfire.ext.widgets.common.client.common.popups.errors.ErrorPopup;
import org.uberfire.java.nio.file.FileSystemNotFoundException;
import org.uberfire.java.nio.file.NoSuchFileException;
import org.uberfire.mvp.Command;
import org.uberfire.workbench.model.menu.MenuItem;
import org.uberfire.workbench.model.menu.Menus;

/**
 * Utility class to build the Commands for CommandDrivenErrorCallback.
 */
public class CommandBuilder {

    private final Map<Class<? extends Throwable>, Command> commands = new HashMap<Class<? extends Throwable>, Command>();

    public CommandBuilder add( final Class<? extends Throwable> throwable,
                               final Command command ) {
        PortablePreconditions.checkNotNull( "throwable",
                                            throwable );
        PortablePreconditions.checkNotNull( "command",
                                            command );
        commands.put( throwable,
                      command );
        return this;
    }

    public CommandBuilder addNoSuchFileException( final HasBusyIndicator view,
                                                  final Callback<IsWidget> callback ) {
        add( NoSuchFileException.class,
             new Command() {

                 @Override
                 public void execute() {
                     callback.callback( new NoSuchFileWidget() );
                     view.hideBusyIndicator();
                 }
             }
           );
        return this;
    }

    public CommandBuilder addNoSuchFileException( final HasBusyIndicator view,
                                                  final MultiPageEditor editor ) {
        add( NoSuchFileException.class,
             new Command() {

                 @Override
                 public void execute() {
                     editor.clear();
                     editor.addWidget( new NoSuchFileWidget(),
                                       CommonConstants.INSTANCE.NoSuchFileTabTitle() );
                     view.hideBusyIndicator();
                 }
             }
           );
        return this;
    }

    public CommandBuilder addNoSuchFileException( final HasBusyIndicator view,
                                                  final MultiPageEditor editor,
                                                  final Menus menus ) {
        add( NoSuchFileException.class,
             new Command() {

                 @Override
                 public void execute() {
                     editor.clear();
                     editor.addWidget( new NoSuchFileWidget(),
                                       CommonConstants.INSTANCE.NoSuchFileTabTitle() );
                     disableMenuItems( menus );
                     view.hideBusyIndicator();
                 }

             }
           );
        return this;
    }

    public CommandBuilder addNoSuchFileException( final HasBusyIndicator view,
                                                  final Menus menus ) {
        add( NoSuchFileException.class,
             new Command() {

                 @Override
                 public void execute() {
                     disableMenuItems( menus );
                     view.hideBusyIndicator();
                 }

             }
           );
        return this;
    }

    public CommandBuilder addFileSystemNotFoundException( final HasBusyIndicator view,
                                                          final MultiPageEditor editor,
                                                          final Menus menus ) {
        add( FileSystemNotFoundException.class,
             new Command() {

                 @Override
                 public void execute() {
                     editor.clear();
                     editor.addWidget( new NoSuchFileWidget(),
                                       CommonConstants.INSTANCE.NoSuchFileTabTitle() );
                     disableMenuItems( menus );
                     view.hideBusyIndicator();
                 }

             }
           );
        return this;
    }

    public CommandBuilder addFileSystemNotFoundException( final HasBusyIndicator view,
                                                          final Menus menus ) {
        add( FileSystemNotFoundException.class,
             new Command() {

                 @Override
                 public void execute() {
                     disableMenuItems( menus );
                     view.hideBusyIndicator();
                 }

             }
           );
        return this;
    }

    public CommandBuilder addSourceCodeGenerationFailedException( final HasBusyIndicator view,
                                                                  final ViewDRLSourceWidget sourceWidget ) {
        add( SourceGenerationFailedException.class,
             new Command() {

                 @Override
                 public void execute() {
                     sourceWidget.clearContent();
                     view.hideBusyIndicator();
                     ErrorPopup.showMessage( CommonConstants.INSTANCE.FailedToGenerateSource() );
                 }

             }
           );
        return this;
    }

    private void disableMenuItems( final Menus menus ) {
        for ( MenuItem mi : menus.getItemsMap().values() ) {
            mi.setEnabled( false );
        }
    }

    public Map<Class<? extends Throwable>, Command> build() {
        return commands;
    }

}