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com.hfg xml, html, svg, and bioinformatics utility library
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package com.hfg.html;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

import com.hfg.util.StringBuilderPlus;
import com.hfg.util.collection.CollectionUtil;
import com.hfg.xml.XMLException;
import com.hfg.xml.parser.SaxyParser;

//------------------------------------------------------------------------------
/**
 Represents an HTML fragment.
 
 @author J. Alex Taylor, hairyfatguy.com
 
 */
//------------------------------------------------------------------------------
// com.hfg XML/HTML Coding Library
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
// J. Alex Taylor, President, Founder, CEO, COO, CFO, OOPS hairyfatguy.com
// [email protected]
//------------------------------------------------------------------------------

public class HTMLFragment
{
    private List mRootNodes;

    //###########################################################################
    // CONSTRUCTORS
    //###########################################################################

    //---------------------------------------------------------------------------
    public HTMLFragment()
    {
        super();
        init();
    }

    //---------------------------------------------------------------------------
    public HTMLFragment(HTMLTag inRootTag)
    {
        addRootNode(inRootTag);
    }

    //---------------------------------------------------------------------------
    public HTMLFragment(BufferedReader inReader)
    {
        try
        {
            init(inReader);
        }
        catch (Exception e)
        {
            throw new XMLException(e);
        }
    }

    //---------------------------------------------------------------------------
    public HTMLFragment(BufferedInputStream inStream)
    {
        try
        {
            BufferedReader reader = new BufferedReader(new InputStreamReader(inStream));
            init(reader);
        }
        catch (Exception e)
        {
            throw new XMLException(e);
        }
    }

    //---------------------------------------------------------------------------
    private void init()
    {
    }


    //---------------------------------------------------------------------------
    private void init(BufferedReader inReader)
    {
        try
        {
            try
            {
                HTMLTagReader tagReader = getTagReader();
                tagReader.parse(inReader);
                mRootNodes = tagReader.getRootNodes();
            }
            finally
            {
                if (inReader != null)
                {
                    inReader.close();
                }
            }
        }
        catch (IOException e)
        {
            throw new XMLException(e);
        }
    }


    //###########################################################################
    // PUBLIC METHODS
    //###########################################################################

    //---------------------------------------------------------------------------
    public void addRootNode(HTMLNode inRootNode)
    {
        if (null == mRootNodes)
        {
            mRootNodes = new ArrayList<>(3);
        }

        mRootNodes.add(inRootNode);
    }

    //---------------------------------------------------------------------------
    public List getRootNodes()
    {
        return mRootNodes;
    }

    //---------------------------------------------------------------------------
    public String toHTML()
    {
        StringBuilderPlus buffer = new StringBuilderPlus();
        if (CollectionUtil.hasValues(getRootNodes()))
        {
            for (HTMLNode node : (List) (Object) getRootNodes())
            {
                buffer.append(node.toHTML());
            }
        }

        return buffer.toString();
    }

    //--------------------------------------------------------------------------
    protected HTMLTagReader getTagReader()
    {
        HTMLTagReader tagReader = new HTMLTagReader();
        if (tagReader.getParser() instanceof SaxyParser)
        {
            ((SaxyParser) tagReader.getParser()).setLenientHTMLParsing(true);
        }

        return tagReader;
    }

}