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/*
 * Copyright (c) 2006 Pyxis Technologies inc.
 *
 * This is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This software 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA,
 * or see the FSF site: http://www.fsf.org.
 */

package com.greenpepper.util;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import com.greenpepper.Example;

/**
 * ExampleUtil class.
 *
 * @author oaouattara
 * @version $Id: $Id
 */
public final class ExampleUtil
{
    private ExampleUtil()
    {
    }

    /**
     * asArray.
     *
     * @param example a T object.
     * @param  a T object.
     * @return an array of T objects.
     */
    @SuppressWarnings("unchecked")
    public static  T[] asArray( T example )
    {
        List examples = asList( example );
        T[] array = (T[]) Array.newInstance( example.getClass(), examples.size() );
        return examples.toArray( array );
    }

    /**
     * asList.
     *
     * @param example a {@link com.greenpepper.Example} object.
     * @return a {@link java.util.List} object.
     */
    public static List asList( Example example )
    {
        if (example == null) return new ArrayList();

        List all = new ArrayList();
        for (Example each : example)
        {
            all.add( each );
        }
        return all;
    }

    /**
     * content.
     *
     * @param cells a {@link java.lang.Iterable} object.
     * @return an array of {@link java.lang.String} objects.
     */
    public static String[] content( Iterable cells )
    {
        if (cells == null) return new String[0];

        final List values = new ArrayList();
        for (Example cell : cells)
        {
            values.add( cell.getContent() );
        }

        return values.toArray( new String[values.size()] );
    }

    /**
     * contentAsList.
     *
     * @param cells a {@link java.lang.Iterable} object.
     * @return a {@link java.util.List} object.
     */
    public static List contentAsList( Iterable cells )
    {
        return new ArrayList( Arrays.asList( content( cells ) ) );
    }

    /**
     * asString.
     *
     * @param example a {@link com.greenpepper.Example} object.
     * @return a {@link java.lang.String} object.
     */
    public static String asString( Example example )
    {
        StringWriter sw = new StringWriter();
        PrintWriter writer = new PrintWriter( sw );
        example.print( writer );
        return sw.toString();
    }

    /**
     * contentOf.
     *
     * @param cell a {@link com.greenpepper.Example} object.
     * @return a {@link java.lang.String} object.
     */
    public static String contentOf( Example cell )
    {
        return cell != null ? cell.getContent() : null;
    }
}