Package org.apache.felix.framework

Class URLHandlersStreamHandlerProxy

java.lang.Object

java.net.URLStreamHandler

org.apache.felix.framework.URLHandlersStreamHandlerProxy

All Implemented Interfaces:

java.lang.reflect.InvocationHandler, URLStreamHandlerSetter

public class URLHandlersStreamHandlerProxy
extends java.net.URLStreamHandler
implements URLStreamHandlerSetter, java.lang.reflect.InvocationHandler

This class implements a stream handler proxy. When the stream handler proxy instance is created, it is associated with a particular protocol and will answer all future requests for handling of that stream type. It does not directly handle the stream handler requests, but delegates the requests to an underlying stream handler service.

The proxy instance for a particular protocol is used for all framework instances that may contain their own stream handler services. When performing a stream handler operation, the proxy retrieves the handler service from the framework instance associated with the current call stack and delegates the call to the handler service.

The proxy will create simple stream handler service trackers for each framework instance. The trackers will listen to service events in its respective framework instance to maintain a reference to the "best" stream handler service at any given time.

Field Summary

Fields

Modifier and Type	Field	Description
private static java.lang.reflect.Method	EQUALS
private static java.lang.reflect.Method	GET_DEFAULT_PORT
private static java.lang.reflect.Method	GET_HOST_ADDRESS
private static java.lang.reflect.Method	HASH_CODE
private static java.lang.reflect.Method	HOSTS_EQUAL
private SecureAction	m_action
private java.net.URLStreamHandler	m_builtIn
private java.net.URL	m_builtInURL
private static java.lang.ThreadLocal	m_loopCheck
private java.lang.String	m_protocol
private java.lang.Object	m_service
private static java.lang.reflect.Method	OPEN_CONNECTION
private static java.lang.reflect.Method	OPEN_CONNECTION_PROXY
private static java.lang.reflect.Method	SAME_FILE
private static java.lang.Class[]	STRING_TYPES
private static java.lang.reflect.Method	TO_EXTERNAL_FORM
private static java.lang.Class[]	URL_PROXY_CLASS

Constructor Summary

Constructors

Modifier	Constructor	Description
private	URLHandlersStreamHandlerProxy(java.lang.Object service, SecureAction action)
	URLHandlersStreamHandlerProxy(java.lang.String protocol, SecureAction action, java.net.URLStreamHandler builtIn, java.net.URL builtInURL)

Method Summary

Modifier and Type	Method	Description
protected boolean	equals(java.net.URL url1, java.net.URL url2)
protected int	getDefaultPort()
protected java.net.InetAddress	getHostAddress(java.net.URL url)
private java.lang.Object	getStreamHandlerService()	Private method to retrieve the stream handler service from the framework instance associated with the current call stack.
protected int	hashCode(java.net.URL url)
protected boolean	hostsEqual(java.net.URL url1, java.net.URL url2)
java.lang.Object	invoke(java.lang.Object obj, java.lang.reflect.Method method, java.lang.Object[] params)
protected java.net.URLConnection	openConnection(java.net.URL url)
protected java.net.URLConnection	openConnection(java.net.URL url, java.net.Proxy proxy)
protected void	parseURL(java.net.URL url, java.lang.String spec, int start, int limit)
protected boolean	sameFile(java.net.URL url1, java.net.URL url2)
void	setURL(java.net.URL url, java.lang.String protocol, java.lang.String host, int port, java.lang.String file, java.lang.String ref)
void	setURL(java.net.URL url, java.lang.String protocol, java.lang.String host, int port, java.lang.String authority, java.lang.String userInfo, java.lang.String path, java.lang.String query, java.lang.String ref)
protected java.lang.String	toExternalForm(java.net.URL url)
private java.lang.String	toExternalForm(java.net.URL url, java.lang.Object svc)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

URL_PROXY_CLASS

private static final java.lang.Class[] URL_PROXY_CLASS

STRING_TYPES

private static final java.lang.Class[] STRING_TYPES

EQUALS

private static final java.lang.reflect.Method EQUALS

GET_DEFAULT_PORT

private static final java.lang.reflect.Method GET_DEFAULT_PORT

GET_HOST_ADDRESS

private static final java.lang.reflect.Method GET_HOST_ADDRESS

HASH_CODE

private static final java.lang.reflect.Method HASH_CODE

HOSTS_EQUAL

private static final java.lang.reflect.Method HOSTS_EQUAL

OPEN_CONNECTION

private static final java.lang.reflect.Method OPEN_CONNECTION

OPEN_CONNECTION_PROXY

private static final java.lang.reflect.Method OPEN_CONNECTION_PROXY

SAME_FILE

private static final java.lang.reflect.Method SAME_FILE

TO_EXTERNAL_FORM

private static final java.lang.reflect.Method TO_EXTERNAL_FORM

m_service

private final java.lang.Object m_service

m_action

private final SecureAction m_action

m_builtIn

private final java.net.URLStreamHandler m_builtIn

m_builtInURL

private final java.net.URL m_builtInURL

m_protocol

private final java.lang.String m_protocol

m_loopCheck

private static final java.lang.ThreadLocal m_loopCheck

Constructor Detail

URLHandlersStreamHandlerProxy

public URLHandlersStreamHandlerProxy(java.lang.String protocol,
                                     SecureAction action,
                                     java.net.URLStreamHandler builtIn,
                                     java.net.URL builtInURL)

URLHandlersStreamHandlerProxy

private URLHandlersStreamHandlerProxy(java.lang.Object service,
                                      SecureAction action)

Method Detail

equals

protected boolean equals(java.net.URL url1,
                         java.net.URL url2)

Overrides:

equals in class java.net.URLStreamHandler

getDefaultPort

protected int getDefaultPort()

Overrides:

getDefaultPort in class java.net.URLStreamHandler

getHostAddress

protected java.net.InetAddress getHostAddress(java.net.URL url)

Overrides:

getHostAddress in class java.net.URLStreamHandler

hashCode

protected int hashCode(java.net.URL url)

Overrides:

hashCode in class java.net.URLStreamHandler

hostsEqual

protected boolean hostsEqual(java.net.URL url1,
                             java.net.URL url2)

Overrides:

hostsEqual in class java.net.URLStreamHandler

openConnection

protected java.net.URLConnection openConnection(java.net.URL url)
                                         throws java.io.IOException

Specified by:

openConnection in class java.net.URLStreamHandler

Throws:

java.io.IOException

openConnection

protected java.net.URLConnection openConnection(java.net.URL url,
                                                java.net.Proxy proxy)
                                         throws java.io.IOException

Overrides:

openConnection in class java.net.URLStreamHandler

Throws:

java.io.IOException

parseURL

protected void parseURL(java.net.URL url,
                        java.lang.String spec,
                        int start,
                        int limit)

Overrides:

parseURL in class java.net.URLStreamHandler

sameFile

protected boolean sameFile(java.net.URL url1,
                           java.net.URL url2)

Overrides:

sameFile in class java.net.URLStreamHandler

setURL

public void setURL(java.net.URL url,
                   java.lang.String protocol,
                   java.lang.String host,
                   int port,
                   java.lang.String authority,
                   java.lang.String userInfo,
                   java.lang.String path,
                   java.lang.String query,
                   java.lang.String ref)

Specified by:

setURL in interface URLStreamHandlerSetter

Overrides:

setURL in class java.net.URLStreamHandler

See Also:

"java.net.URLStreamHandler.setURL(URL,String,String,int,String,String,String,String)"

setURL

public void setURL(java.net.URL url,
                   java.lang.String protocol,
                   java.lang.String host,
                   int port,
                   java.lang.String file,
                   java.lang.String ref)

Specified by:

setURL in interface URLStreamHandlerSetter

Overrides:

setURL in class java.net.URLStreamHandler

See Also:

"java.net.URLStreamHandler.setURL(URL,String,String,int,String,String)"

toExternalForm

protected java.lang.String toExternalForm(java.net.URL url)

Overrides:

toExternalForm in class java.net.URLStreamHandler

toExternalForm

private java.lang.String toExternalForm(java.net.URL url,
                                        java.lang.Object svc)

getStreamHandlerService

private java.lang.Object getStreamHandlerService()

Private method to retrieve the stream handler service from the framework instance associated with the current call stack. A simple service tracker is created and cached for the associated framework instance when this method is called.

Returns:

the stream handler service from the framework instance associated with the current call stack or null is no service is available.

invoke

public java.lang.Object invoke(java.lang.Object obj,
                               java.lang.reflect.Method method,
                               java.lang.Object[] params)
                        throws java.lang.Throwable

Specified by:

invoke in interface java.lang.reflect.InvocationHandler

Throws:

java.lang.Throwable