001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU General
007: * Public License Version 2 only ("GPL") or the Common Development and Distribution
008: * License("CDDL") (collectively, the "License"). You may not use this file except in
009: * compliance with the License. You can obtain a copy of the License at
010: * http://www.netbeans.org/cddl-gplv2.html or nbbuild/licenses/CDDL-GPL-2-CP. See the
011: * License for the specific language governing permissions and limitations under the
012: * License. When distributing the software, include this License Header Notice in
013: * each file and include the License file at nbbuild/licenses/CDDL-GPL-2-CP. Sun
014: * designates this particular file as subject to the "Classpath" exception as
015: * provided by Sun in the GPL Version 2 section of the License file that
016: * accompanied this code. If applicable, add the following below the License Header,
017: * with the fields enclosed by brackets [] replaced by your own identifying
018: * information: "Portions Copyrighted [year] [name of copyright owner]"
019: *
020: * Contributor(s):
021: *
022: * The Original Software is NetBeans. The Initial Developer of the Original Software
023: * is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun Microsystems, Inc. All
024: * Rights Reserved.
025: *
026: * If you wish your version of this file to be governed by only the CDDL or only the
027: * GPL Version 2, indicate your decision by adding "[Contributor] elects to include
028: * this software in this distribution under the [CDDL or GPL Version 2] license." If
029: * you do not indicate a single choice of license, a recipient has the option to
030: * distribute your version of this file under either the CDDL, the GPL Version 2 or
031: * to extend the choice of license to its licensees as provided above. However, if
032: * you add GPL Version 2 code and therefore, elected the GPL Version 2 license, then
033: * the option applies only if the new code is made subject to such option by the
034: * copyright holder.
035: */
036:
037: package org.netbeans.installer.sandbox.download.connection;
038:
039: import java.io.File;
040: import java.io.IOException;
041: import java.net.MalformedURLException;
042: import java.net.URI;
043: import java.util.Date;
044: import org.netbeans.installer.sandbox.download.DownloadOptions;
045: import org.netbeans.installer.utils.exceptions.InitializationException;
046:
047: /**
048: *
049: * @author Kirill Sorokin
050: */
051: public abstract class Connection {
052: /////////////////////////////////////////////////////////////////////////////////
053: // Constants
054: public static final int DEFAULT_CONNECTION_TIMEOUT = 3000;
055:
056: /////////////////////////////////////////////////////////////////////////////////
057: // Static
058: protected static int connectionTimeout = DEFAULT_CONNECTION_TIMEOUT;
059:
060: public static Connection getConnection(URI uri, long offset,
061: long length, DownloadOptions options)
062: throws InitializationException {
063: try {
064: if (uri.getScheme().equals("http")) {
065: return new HTTPConnection(uri.toURL(), offset, length,
066: options);
067: }
068: if (uri.getScheme().equals("file")) {
069: return new FileConnection(new File(uri));
070: }
071: if (uri.getScheme().equals("resource")) {
072: return new ResourceConnection(uri
073: .getSchemeSpecificPart(), (ClassLoader) options
074: .get(DownloadOptions.CLASSLOADER));
075: }
076: } catch (MalformedURLException e) {
077: throw new InitializationException(
078: "Cannot convert the "
079: + "supplied URI to an URL, which is required for connections "
080: + "of this type.", e);
081: }
082:
083: throw new InitializationException("Cannot initialize "
084: + "connection, unknown URI scheme - " + uri.getScheme());
085: }
086:
087: public static int getConnectionTimeout() {
088: return connectionTimeout;
089: }
090:
091: public static void setConnectionTimeout(int aConnectionTimeout) {
092: connectionTimeout = aConnectionTimeout;
093: }
094:
095: /////////////////////////////////////////////////////////////////////////////////
096: // Instance
097: public abstract void open() throws IOException;
098:
099: public abstract void close() throws IOException;
100:
101: public abstract int read(byte[] buffer) throws IOException;
102:
103: public abstract int available() throws IOException;
104:
105: public abstract boolean supportsRanges();
106:
107: public abstract long getContentLength();
108:
109: public abstract Date getModificationDate();
110: }
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