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The RichFaces Core Implementation.
/**
* License Agreement.
*
* Rich Faces - Natural Ajax for Java Server Faces (JSF)
*
* Copyright (C) 2007 Exadel, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.richfaces;
import java.io.IOException;
import java.io.InputStream;
import java.net.JarURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.security.CodeSource;
import java.security.ProtectionDomain;
import java.text.MessageFormat;
import java.util.jar.Attributes;
import java.util.jar.JarFile;
import java.util.jar.JarInputStream;
import java.util.jar.Manifest;
import org.ajax4jsf.resource.util.URLToStreamHelper;
import org.richfaces.log.Logger;
import org.richfaces.log.RichfacesLogger;
/**
* Vendor and version information for A4J project
*
* @author [email protected] (latest modification by $Author$)
* @version $Revision$ $Date$
*/
public final class VersionBean {
public static final Version VERSION = new Version();
/**
* Class for incapsulate version info.
*
* @author [email protected] (latest modification by $Author$)
* @version $Revision$ $Date$
*/
public static class Version {
private static final Logger LOGGER = RichfacesLogger.APPLICATION.getLogger();
private static final String UNKNOWN = "";
private String implementationVendor = UNKNOWN;
// TODO nick - default value for manifest file absense - review
private String implementationVersion = "4.3.1.CR1";
private String implementationTitle = UNKNOWN;
private String scmTimestamp = UNKNOWN;
private String fullVersionString = UNKNOWN;
private boolean containsDataFromManifest = false;
public Version() {
initialize();
}
private String getAttributeValueOrDefault(Attributes attributes, String name) {
String value = attributes.getValue(name);
if (value == null) {
value = UNKNOWN;
}
return value;
}
private void initialize() {
Manifest manifest = null;
try {
manifest = readManifest();
} catch (Exception e) {
LOGGER.error(MessageFormat.format("Error reading project metadata: {0}", e.getMessage()), e);
}
if (manifest != null) {
initializePropertiesFromManifest(manifest);
initializeDerivativeProperties();
}
}
private void initializePropertiesFromManifest(Manifest manifest) {
containsDataFromManifest = true;
Attributes attributes = manifest.getMainAttributes();
implementationVendor = getAttributeValueOrDefault(attributes, "Implementation-Vendor");
implementationVersion = getAttributeValueOrDefault(attributes, "Implementation-Version");
implementationTitle = getAttributeValueOrDefault(attributes, "Implementation-Title");
scmTimestamp = getAttributeValueOrDefault(attributes, "SCM-Timestamp");
}
private void initializeDerivativeProperties() {
fullVersionString = MessageFormat.format("{0}", implementationVersion);
}
private Manifest readManifest() {
ProtectionDomain domain = VersionBean.class.getProtectionDomain();
if (domain != null) {
CodeSource codeSource = domain.getCodeSource();
if (codeSource != null) {
URL url = codeSource.getLocation();
if (url != null) {
InputStream manifestStream = null;
try {
URL manifestFileUrl;
if ("vfs".equals(url.getProtocol())) {
String manifestFile = String.format("%s/%s", url.toExternalForm(), JarFile.MANIFEST_NAME);
manifestFileUrl = new URL(manifestFile);
} else {
manifestFileUrl = new URL(url, JarFile.MANIFEST_NAME);
}
manifestStream = URLToStreamHelper.urlToStream(manifestFileUrl);
return new Manifest(manifestStream);
} catch (MalformedURLException e1) {
// that's ok - just log in debug
if (LOGGER.isDebugEnabled()) {
LOGGER.debug(e1.getMessage(), e1);
}
} catch (IOException e) {
// that's ok - just log in debug
if (LOGGER.isDebugEnabled()) {
LOGGER.debug(e.getMessage(), e);
}
} finally {
if (manifestStream != null) {
try {
manifestStream.close();
} catch (IOException e) {
LOGGER.error(MessageFormat.format("Error closing stream: {0}", e.getMessage()), e);
}
}
}
JarInputStream jis = null;
try {
URLConnection urlConnection = url.openConnection();
urlConnection.setUseCaches(false);
if (urlConnection instanceof JarURLConnection) {
JarURLConnection jarUrlConnection = (JarURLConnection) urlConnection;
return jarUrlConnection.getManifest();
} else {
jis = new JarInputStream(urlConnection.getInputStream());
return jis.getManifest();
}
} catch (IOException e) {
LOGGER.error(MessageFormat.format("Error reading META-INF/MANIFEST.MF file: {0}", e.getMessage()),
e);
} finally {
if (jis != null) {
try {
jis.close();
} catch (IOException e) {
LOGGER.error(MessageFormat.format("Error closing stream: {0}", e.getMessage()), e);
}
}
}
}
}
}
return null;
}
boolean containsDataFromManifest() {
return containsDataFromManifest;
}
public String getVersion() {
return fullVersionString;
}
public String getImplementationTitle() {
return implementationTitle;
}
public String getImplementationVendor() {
return implementationVendor;
}
public String getImplementationVersion() {
return implementationVersion;
}
public String getScmTimestamp() {
return scmTimestamp;
}
@Override
public String toString() {
if (this.containsDataFromManifest()) {
return getImplementationTitle() + " by " + getImplementationVendor() + ", version " + getVersion();
} else {
return getVersion();
}
}
}
public String getVendor() {
return VERSION.getImplementationVendor();
}
public String getTitle() {
return VERSION.getImplementationTitle();
}
public String getTimestamp() {
return VERSION.getScmTimestamp();
}
public Version getVersion() {
return VERSION;
}
@Override
public String toString() {
return VERSION.toString();
}
}