File	Doc	Category	Size	Date	Package
JarURLConnection.java	API Doc	Java SE 6 API	8649	Tue Jun 10 00:25:40 BST 2008	java.net

JarURLConnection

• java.lang.Object
  • java.net.URLConnection

jar:<url>!/{entry}

URL url = new URL("jar:file:/home/duke/duke.jar!/");
JarURLConnection jarConnection = (JarURLConnection)url.openConnection();
Manifest manifest = jarConnection.getManifest();

Fields Summary
private URL	jarFileURL
private String	entryName
protected URLConnection	jarFileURLConnection The connection to the JAR file URL, if the connection has been initiated. This should be set by connect.

Constructors Summary
protected JarURLConnection(URL url) Creates the new JarURLConnection to the specified URL. param url the URL throws MalformedURLException if no legal protocol could be found in a specification string or the string could not be parsed. super(url); parseSpecs(url);

Methods Summary
public java.util.jar.Attributes	getAttributes() Return the Attributes object for this connection if the URL for it points to a JAR file entry, null otherwise. return the Attributes object for this connection if the URL for it points to a JAR file entry, null otherwise. exception IOException if getting the JAR entry causes an IOException to be thrown. see #getJarEntry JarEntry e = getJarEntry(); return e != null ? e.getAttributes() : null;
public java.security.cert.Certificate[]	getCertificates() Return the Certificate object for this connection if the URL for it points to a JAR file entry, null otherwise. This method can only be called once the connection has been completely verified by reading from the input stream until the end of the stream has been reached. Otherwise, this method will return null return the Certificate object for this connection if the URL for it points to a JAR file entry, null otherwise. exception IOException if getting the JAR entry causes an IOException to be thrown. see #getJarEntry JarEntry e = getJarEntry(); return e != null ? e.getCertificates() : null;
public java.lang.String	getEntryName() Return the entry name for this connection. This method returns null if the JAR file URL corresponding to this connection points to a JAR file and not a JAR file entry. return the entry name for this connection, if any. return entryName;
public java.util.jar.JarEntry	getJarEntry() Return the JAR entry object for this connection, if any. This method returns null if the JAR file URL corresponding to this connection points to a JAR file and not a JAR file entry. return the JAR entry object for this connection, or null if the JAR URL for this connection points to a JAR file. exception IOException if getting the JAR file for this connection causes an IOException to be trown. see #getJarFile see #getJarEntry return getJarFile().getJarEntry(entryName);
public abstract java.util.jar.JarFile	getJarFile() Return the JAR file for this connection. return the JAR file for this connection. If the connection is a connection to an entry of a JAR file, the JAR file object is returned exception IOException if an IOException occurs while trying to connect to the JAR file for this connection. see #connect
public java.net.URL	getJarFileURL() Returns the URL for the Jar file for this connection. return the URL for the Jar file for this connection. return jarFileURL;
public java.util.jar.Attributes	getMainAttributes() Returns the main Attributes for the JAR file for this connection. return the main Attributes for the JAR file for this connection. exception IOException if getting the manifest causes an IOException to be thrown. see #getJarFile see #getManifest Manifest man = getManifest(); return man != null ? man.getMainAttributes() : null;
public java.util.jar.Manifest	getManifest() Returns the Manifest for this connection, or null if none. return the manifest object corresponding to the JAR file object for this connection. exception IOException if getting the JAR file for this connection causes an IOException to be trown. see #getJarFile return getJarFile().getManifest();
private void	parseSpecs(java.net.URL url) String spec = url.getFile(); int separator = spec.indexOf("!/"); /* * REMIND: we don't handle nested JAR URLs */ if (separator == -1) { throw new MalformedURLException("no !/ found in url spec:" + spec); } jarFileURL = new URL(spec.substring(0, separator++)); entryName = null; /* if ! is the last letter of the innerURL, entryName is null */ if (++separator != spec.length()) { entryName = spec.substring(separator, spec.length()); entryName = ParseUtil.decode (entryName); }