Copyright (c) 2004, 2013 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2004, 2013 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.osgi.storage.url;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import org.eclipse.osgi.internal.messages.Msg;
import org.eclipse.osgi.storage.bundlefile.BundleEntry;
import org.eclipse.osgi.util.NLS;

URLConnection for BundleClassLoader resources.
/**
 * URLConnection for BundleClassLoader resources.
 */

public class BundleURLConnection extends URLConnection {
	
BundleEntry that the URL is associated. /** BundleEntry that the URL is associated. */
	protected final BundleEntry bundleEntry;

	
InputStream for this URLConnection. /** InputStream for this URLConnection. */
	protected InputStream in;

	
content type for this URLConnection /** content type for this URLConnection */
	protected String contentType;

	
Constructor for a BundleClassLoader resource URLConnection.
Params:
url –  URL for this URLConnection.
bundleEntry –  BundleEntry that the URLConnection is associated./**
	 * Constructor for a BundleClassLoader resource URLConnection.
	 *
	 * @param url  URL for this URLConnection.
	 * @param bundleEntry  BundleEntry that the URLConnection is associated.
	 */
	public BundleURLConnection(URL url, BundleEntry bundleEntry) {
		super(url);

		this.bundleEntry = bundleEntry;
		this.in = null;
		this.contentType = null;
	}

	@Override
	public synchronized void connect() throws IOException {
		if (!connected) {
			if (bundleEntry != null) {
				in = bundleEntry.getInputStream();
				connected = true;
			} else {
				throw new IOException(NLS.bind(Msg.RESOURCE_NOT_FOUND_EXCEPTION, url));
			}
		}
	}

	@Override
	public long getContentLengthLong() {
		return bundleEntry.getSize();
	}

	@Override
	public String getContentType() {
		if (contentType == null) {
			contentType = guessContentTypeFromName(bundleEntry.getName());

			if (contentType == null) {
				if (!connected) {
					try {
						connect();
					} catch (IOException e) {
						return (null);
					}
				}
				try {
					if (in.markSupported())
						contentType = guessContentTypeFromStream(in);
				} catch (IOException e) {
					// do nothing
				}
			}
		}

		return (contentType);
	}

	@Override
	public boolean getDoInput() {
		return (true);
	}

	@Override
	public boolean getDoOutput() {
		return (false);
	}

	@Override
	public InputStream getInputStream() throws IOException {
		if (!connected) {
			connect();
		}

		return (in);
	}

	@Override
	public long getLastModified() {
		long lastModified = bundleEntry.getTime();

		if (lastModified == -1) {
			return (0);
		}

		return (lastModified);
	}

	
Converts the URL to a common local URL protocol (i.e file: or jar: protocol)
Returns:
the local URL using a common local protocol/**
	 * Converts the URL to a common local URL protocol (i.e file: or jar: protocol)
	 * @return the local URL using a common local protocol
	 */
	public URL getLocalURL() {
		return bundleEntry.getLocalURL();
	}

	
Converts the URL to a URL that uses the file: protocol.  The content of this
URL may be downloaded or extracted onto the local filesystem to create a file URL.
Returns:
the local URL that uses the file: protocol/**
	 * Converts the URL to a URL that uses the file: protocol.  The content of this
	 * URL may be downloaded or extracted onto the local filesystem to create a file URL.
	 * @return the local URL that uses the file: protocol
	 */
	public URL getFileURL() {
		return bundleEntry.getFileURL();
	}
}