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package net.sf.fmj.media;

import java.io.*;
import java.util.*;

import javax.media.*;
import javax.media.protocol.*;

/**
 * Merges multiple {@link PushBufferDataSource}.
 *
 * @author Ken Larson
 *
 */
public class MergingPushBufferDataSource extends PushBufferDataSource
{
    protected final List sources;

    public MergingPushBufferDataSource(List sources)
    {
        super();
        this.sources = sources;
    }

    @Override
    public void connect() throws IOException
    {
        for (PushBufferDataSource source : sources)
            source.connect();
    }

    @Override
    public void disconnect()
    {
        for (PushBufferDataSource source : sources)
            source.disconnect();
    }

    @Override
    public String getContentType()
    {
        // if all content types the same, use it, otherwise,
        // ContentDescriptor.MIXED.
        for (int i = 0; i < sources.size(); ++i)
        {
            if (!sources.get(i).getContentType()
                    .equals(sources.get(0).getContentType()))
                return ContentDescriptor.MIXED;
        }
        return sources.get(0).getContentType();
    }

    @Override
    public Object getControl(String controlType)
    {
        for (PushBufferDataSource source : sources)
        {
            Object control = source.getControl(controlType);
            if (control != null)
                return control;
        }
        return null;
    }

    @Override
    public Object[] getControls()
    {
        final List