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JasperReports Library
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/*
 * JasperReports - Free Java Reporting Library.
 * Copyright (C) 2001 - 2011 Jaspersoft Corporation. All rights reserved.
 * http://www.jaspersoft.com
 *
 * Unless you have purchased a commercial license agreement from Jaspersoft,
 * the following license terms apply:
 *
 * This program is part of JasperReports.
 *
 * JasperReports 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 3 of the License, or
 * (at your option) any later version.
 *
 * JasperReports 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 JasperReports. If not, see .
 */
package net.sf.jasperreports.data;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.ArrayList;
import java.util.List;

import net.sf.jasperreports.engine.DefaultJasperReportsContext;
import net.sf.jasperreports.engine.JasperReportsContext;
import net.sf.jasperreports.engine.util.CompositeClassloader;
import net.sf.jasperreports.engine.util.FileResolver;
import net.sf.jasperreports.engine.util.SimpleFileResolver;

/**
 * @author Teodor Danciu ([email protected])
 * @version $Id: AbstractClasspathAwareDataAdapterService.java 5667 2012-09-17 14:20:09Z chicuslavic $
 */
public abstract class AbstractClasspathAwareDataAdapterService extends AbstractDataAdapterService 
{
	public static final String CURRENT_CLASS_LOADER = "CURRENT_CLASS_LOADER";
	/**
	 *
	 */
	public AbstractClasspathAwareDataAdapterService(JasperReportsContext jasperReportsContext, ClasspathAwareDataAdapter dataAdapter) 
	{
		super(jasperReportsContext, dataAdapter);
	}

	/**
	 * @deprecated Replaced by {@link #AbstractClasspathAwareDataAdapterService(JasperReportsContext, ClasspathAwareDataAdapter)}.
	 */
	public AbstractClasspathAwareDataAdapterService(ClasspathAwareDataAdapter dataAdapter) 
	{
		this(DefaultJasperReportsContext.getInstance(), dataAdapter);
	}

	/**
	 *
	 */
	protected ClassLoader getClassLoader(ClassLoader cloader)
	{ 
		Object obj = getJasperReportsContext().getValue(CURRENT_CLASS_LOADER);
		if(obj != null && obj instanceof ClassLoader)
			cloader = (ClassLoader)obj ; 
		return new CompositeClassloader(getPathClassloader(), cloader); 
	}

	private ClassLoader getPathClassloader() {
		FileResolver fileResolver = null;//FIXMECONTEXT JRResourcesUtil.getFileResolver(null);
		if (fileResolver == null)
		{
			SimpleFileResolver sfr = new SimpleFileResolver(new File("."));//FIXMEREPO
			sfr.setResolveAbsolutePath(true);
			fileResolver = sfr;
		}

		ClasspathAwareDataAdapter dataAdapter = (ClasspathAwareDataAdapter)getDataAdapter();
		List classpath = dataAdapter.getClasspath();
		List urls = new ArrayList();
		for (String path : classpath) 
		{
			File file = fileResolver.resolveFile(path);

			if (file != null && file.exists()) {
				try {
					urls.add(file.toURI().toURL());
				} catch (MalformedURLException e) {
					// e.printStackTrace();
					// We don't care if the entry cannot be found.
				}
			}
		}

		return new URLClassLoader(urls.toArray(new URL[urls.size()]));
	}

}