feedoptions.java

EclipseTrader is a stock exchange analysis system, featuring shares pricing watch, intraday and hi

/*
 * Copyright (c) 2004-2006 Marco Maccaferri and others.
 * 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:
 *     Marco Maccaferri - initial API and implementation
 */

package net.sourceforge.eclipsetrader.core.ui.preferences;

import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.Iterator;

import net.sourceforge.eclipsetrader.core.CorePlugin;
import net.sourceforge.eclipsetrader.core.db.feed.FeedSource;
import net.sourceforge.eclipsetrader.core.ui.internal.Messages;

import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtensionPoint;
import org.eclipse.core.runtime.IExtensionRegistry;
import org.eclipse.core.runtime.Platform;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;

public class FeedOptions
{
    protected Combo feed;
    protected Combo exchange;
    protected Text symbol;
    protected String categoryId;

    public FeedOptions(String categoryId)
    {
        this.categoryId = categoryId;
    }

    public Composite createControls(Composite parent)
    {
        Composite content = new Composite(parent, SWT.NONE);
        GridLayout gridLayout = new GridLayout(2, false);
        content.setLayout(gridLayout);
        content.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

        Label label = new Label(content, SWT.NONE);
        label.setText(Messages.FeedOptions_Feed);
        label.setLayoutData(new GridData(125, SWT.DEFAULT));
        feed = new Combo(content, SWT.SINGLE | SWT.READ_ONLY);
        feed.setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, false));
        feed.setVisibleItemCount(10);
        feed.add(""); //$NON-NLS-1$
        feed.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent e)
            {
                updateFeedExchanges();
            }
        });

        label = new Label(content, SWT.NONE);
        label.setText(Messages.FeedOptions_Exchange);
        label.setLayoutData(new GridData(125, SWT.DEFAULT));
        exchange = new Combo(content, SWT.SINGLE | SWT.READ_ONLY);
        exchange.setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, false));
        exchange.setVisibleItemCount(10);
        exchange.add(""); //$NON-NLS-1$
        exchange.setEnabled(false);

        label = new Label(content, SWT.NONE);
        label.setText(Messages.FeedOptions_Symbol);
        label.setLayoutData(new GridData(125, SWT.DEFAULT));
        symbol = new Text(content, SWT.BORDER);
        symbol.setLayoutData(new GridData(100, SWT.DEFAULT));

        IExtensionRegistry registry = Platform.getExtensionRegistry();
        IExtensionPoint extensionPoint = registry.getExtensionPoint(CorePlugin.FEED_EXTENSION_POINT);
        if (extensionPoint != null)
        {
            IConfigurationElement[] elements = extensionPoint.getConfigurationElements();
            java.util.List plugins = Arrays.asList(elements);
            Collections.sort(plugins, new Comparator() {
                public int compare(Object arg0, Object arg1)
                {
                    if ((arg0 instanceof IConfigurationElement) && (arg1 instanceof IConfigurationElement))
                    {
                        String s0 = ((IConfigurationElement) arg0).getAttribute("name"); //$NON-NLS-1$
                        String s1 = ((IConfigurationElement) arg1).getAttribute("name"); //$NON-NLS-1$
                        return s0.compareTo(s1);
                    }
                    return 0;
                }
            });

            for (Iterator iter = plugins.iterator(); iter.hasNext(); )
            {
                IConfigurationElement element = (IConfigurationElement)iter.next();
                String id = element.getAttribute("id"); //$NON-NLS-1$
                String name = element.getAttribute("name"); //$NON-NLS-1$
                
                IConfigurationElement[] children = element.getChildren();
                for (int i = 0; i < children.length; i++)
                {
                    if (children[i].getName().equals(categoryId))
                    {
                        feed.add(name);
                        feed.setData(String.valueOf(feed.getItemCount() - 1), id);
                    }
                }
            }
        }
        
        feed.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent e)
            {
                updateFeedExchanges();
            }
        });

        return content;
    }
    
    public Composite createControls(Composite parent, FeedSource feedSource)
    {
        Composite content = createControls(parent);
        
        if (feedSource != null)
        {
            String[] items = feed.getItems();
            for (int i = 0; i < items.length; i++)
            {
                if (feed.getData(String.valueOf(i)) != null && feed.getData(String.valueOf(i)).equals(feedSource.getId()))
                {
                    feed.select(i);
                    updateFeedExchanges();
                    break;
                }
            }

            items = exchange.getItems();
            for (int i = 0; i < items.length; i++)
            {
                if (exchange.getData(String.valueOf(i)) != null && exchange.getData(String.valueOf(i)).equals(feedSource.getExchange()))
                {
                    exchange.select(i);
                    break;
                }
            }

            symbol.setText(feedSource.getSymbol());
        }

        return content;
    }

    protected void updateFeedExchanges()
    {
        exchange.removeAll();
        exchange.add(""); //$NON-NLS-1$

        String feedId = (String)feed.getData(String.valueOf(feed.getSelectionIndex()));
        if (feedId != null)
        {
            IExtensionRegistry registry = Platform.getExtensionRegistry();
            IExtensionPoint extensionPoint = registry.getExtensionPoint(CorePlugin.FEED_EXTENSION_POINT);
            if (extensionPoint != null)
            {
                java.util.List plugins = Arrays.asList(extensionPoint.getConfigurationElements());
                for (Iterator iter = plugins.iterator(); iter.hasNext(); )
                {
                    IConfigurationElement element = (IConfigurationElement)iter.next();
                    if (!element.getAttribute("id").equals(feedId)) //$NON-NLS-1$
                        continue;
                    
                    IConfigurationElement[] children = element.getChildren();
                    for (int i = 0; i < children.length; i++)
                    {
                        if (children[i].getName().equals(categoryId)) //$NON-NLS-1$
                        {
                            IConfigurationElement[] exchanges = children[i].getChildren();
                            for (int x = 0; x < exchanges.length; x++)
                            {
                                if (exchanges[x].getName().equals("exchange")) //$NON-NLS-1$
                                {
                                    exchange.setData(String.valueOf(exchange.getItemCount()), exchanges[x].getAttribute("id")); //$NON-NLS-1$
                                    exchange.add(exchanges[x].getAttribute("name")); //$NON-NLS-1$
                                }
                            }
                        }
                    }
                }
            }
        }
        
        exchange.setEnabled(exchange.getItemCount() > 1);
    }

    public FeedSource getFeed()
    {
        if (feed.getSelectionIndex() <= 0)
            return null;
        FeedSource newFeed = new FeedSource();
        newFeed.setId((String)feed.getData(String.valueOf(feed.getSelectionIndex())));
        newFeed.setExchange((String)exchange.getData(String.valueOf(exchange.getSelectionIndex())));
        newFeed.setSymbol(symbol.getText());
        return newFeed;
    }
}