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Oracle Fusion Middleware Java API Reference for Oracle Extension SDK 11g Release 2 (11.1.2.3.0) E17493-04 |
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java.lang.Object
oracle.ide.net.URLFileSystemHelper
oracle.ide.net.HttpURLFileSystemHelper
public class HttpURLFileSystemHelper
The HttpURLFileSystemHelper
class provides an implementation of URLFileSystemHelper
for http URLs.
Constructor Summary | |
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HttpURLFileSystemHelper() |
Method Summary | |
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boolean |
canCreate(java.net.URL url) Tests whether the application can create the resource at the specified URL . |
boolean |
exists(java.net.URL url) Returns true if the specified URL points to a resource that currently exists; returns false otherwise. |
long |
getLength(java.net.URL url) Returns the number of bytes contained in the resource that the specified URL points to. |
java.net.URL |
getParent(java.net.URL url) Returns the URL representing the parent directory of the specified URL . |
protected int |
getPort(java.net.URL url) |
java.lang.String |
getSystemDisplayName(java.net.URL url) Returns the name of a resource as it would be displayed in a system file browser. |
long |
lastModified(java.net.URL url) Returns the last modification time (timestamp) of the resource indicated by the specified URL in milliseconds since 00:00:00 GMT, Jan 1, 1970. |
java.io.InputStream |
openInputStream(java.net.URL url) Opens an InputStream on the specified URL . |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public HttpURLFileSystemHelper()
Method Detail |
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public java.lang.String getSystemDisplayName(java.net.URL url)
getSystemDisplayName
in class URLFileSystemHelper
url
- the URL
of the resourceURLFileSystemHelper.getSystemIcon(URL)
public long getLength(java.net.URL url)
URL
points to. If the length cannot be determined, -1
is returned.
The default implementation attempts to get the content length from the URLConnection
associated with the URL
. If that fails for some reason (e.g. the resource does not exist, there was some other an I/O exception, etc.), -1
is returned.
getLength
in class URLFileSystemHelper
URLConnection
public long lastModified(java.net.URL url)
URL
in milliseconds since 00:00:00 GMT, Jan 1, 1970. If the timestamp can't be determined, -1
is returned.
The default implementation attemps to get the last modified time from the URLConnection
associated with the URL
. If that fails for some reason (e.g. the resource does not exist, there was some other I/O exception, etc.), -1
is returned.
lastModified
in class URLFileSystemHelper
URLConnection
public boolean exists(java.net.URL url)
URLFileSystemHelper
true
if the specified URL
points to a resource that currently exists; returns false
otherwise.
The default implementation simply returns false
without doing anything.
exists
in class URLFileSystemHelper
public boolean canCreate(java.net.URL url)
URL
.canCreate
in class URLFileSystemHelper
true
if the resource at the specified URL
exists or can be created; false
otherwise.public java.net.URL getParent(java.net.URL url)
URLFileSystemHelper
URL
representing the parent directory of the specified URL
. If there is no parent directory, then null
is returned.
The default implementation returns the value of invoking URLFactory.newURL( url, ".." )
, removing the reference portion of the URL.
getParent
in class URLFileSystemHelper
public java.io.InputStream openInputStream(java.net.URL url) throws java.io.IOException
InputStream
on the specified URL
.
The default implementation attempts to open the InputStream
through the URLConnection
associated with the URL
. If the URLConnection
implementation does not support an InputStream
then an UnknownServiceException
(a runtime exception) will be thrown.
openInputStream
in class URLFileSystemHelper
java.io.FileNotFoundException
- if the resource at the specified URL does not exist.java.io.IOException
- if an I/O error occurs when trying to open the InputStream
.java.net.UnknownServiceException
- if the URLConnection
backing the specified URL
does not support an InputStream
.IOException
, URLConnection
, UnknownServiceException
protected int getPort(java.net.URL url)
getPort
in class URLFileSystemHelper
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Oracle Fusion Middleware Java API Reference for Oracle Extension SDK 11g Release 2 (11.1.2.3.0) E17493-04 |
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