public class TLcdStatusInputStreamFactory extends Object implements ILcdInputStreamFactory, ILcdStatusSource
This ILcdInputStreamFactory creates InputStreams that report reading progress by
firing TLcdStatusEvents to the attached ILcdStatusListeners. It can be used
in combination with most ILcdModelDecoder implementations, to conveniently inform end users about
decoding progress. An ILcdStatusListener still needs to be added that actually informs the end user, for
example by using a JProgressBar.
It uses a given ILcdInputStreamFactory to create the actual InputStream. The messages
of the TLcdStatusEvents can be fully customized. They support to include the source name (e.g. file
name) and the percentage of completion.
A list of source names that must be excluded can be provided. If a given source name is on the exclude list, a
regular InputStream is created instead of a special stream that reports status. This can be convenient
to for example avoid reporting progress about an accompanying file, such as a .ref (Luciad reference) or
a .dbf file (attributes of a shp file).
This can be also used to not wrap the input stream for specific usages. For example when support for a data format requires random files access, such as TIFF.
This factory excludes the following format(s) by default:
*.tiff?Calling Thread.interrupt() will make the streams created by this factory throw an
InterruptedIOException upon next (read) access. It also clears the threads interrupted flag.
InputStream.available() method of the InputStream created by the given
ILcdInputStreamFactory returns the total size of the stream to read, in order to correctly predict the
percentage of completion. If 0 is returned, indeterminate TLcdStatusEvents are fired. If the initially
returned size was too small, it will switch to indeterminate progress as soon as this becomes apparent.
| Constructor and Description |
|---|
TLcdStatusInputStreamFactory()
Creates a new
TLcdStatusInputStreamFactory, ready to use. |
TLcdStatusInputStreamFactory(ILcdInputStreamFactory aInputStreamFactory)
Creates a new
TLcdStatusInputStreamFactory that delegates the creation of the actual
InputStream to the given ILcdInputStreamFactory. |
TLcdStatusInputStreamFactory(ILcdInputStreamFactory aInputStreamFactory,
Format aMessageFormat)
Creates a new
TLcdStatusInputStreamFactory for the given ILcdInputStreamFactory
that produces TLcdStatusEvents with messages formatted by the given message format. |
TLcdStatusInputStreamFactory(ILcdInputStreamFactory aInputStreamFactory,
Format aStartBusyMessageFormat,
Format aProgressMessageFormat,
Format aEndBusyMessageFormat)
Creates a new
TLcdStatusInputStreamFactory for the given ILcdInputStreamFactory
that produces TLcdStatusEvents with messages formatted by the given message formats. |
TLcdStatusInputStreamFactory(ILcdInputStreamFactory aInputStreamFactory,
String aMessage)
Creates a new
TLcdStatusInputStreamFactory for the given ILcdInputStreamFactory
that produces TLcdStatusEvents with the given message. |
| Modifier and Type | Method and Description |
|---|---|
void |
addStatusEventListener(ILcdStatusListener aStatusListener)
Adds the given
ILcdStatusListener to this TLcdStatusInputStreamFactory. |
void |
addStatusListener(ILcdStatusListener aListener)
Registers the given listener so it will receive status events from this source.
|
InputStream |
createInputStream(String aSourceName)
Creates an
InputStream from aSource. |
String[] |
getExcludedSources()
Returns the list of source names to exclude from creating streams that produce
TLcdStatusEvents. |
boolean |
isBlockingHint()
Returns the blocking hint that is present in the
TLcdStatusEvents that are
fired to the associated ILcdStatusListeners. |
void |
removeStatusEventListener(ILcdStatusListener aStatusListener)
Removes the given
ILcdStatusListener from this TLcdStatusInputStreamFactory. |
void |
removeStatusListener(ILcdStatusListener aListener)
Removes the specified listener so it is no longer notified.
|
void |
setBlockingHint(boolean aBlockingHint)
Sets the blocking hint that is present in the
TLcdStatusEvents that are fired
to the associated ILcdStatusListeners. |
void |
setExcludedSources(String[] aExcludedSources)
Sets the list of source names (as given to
createInputStream) that must be excluded. |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitcanCreateInputStreampublic TLcdStatusInputStreamFactory()
TLcdStatusInputStreamFactory, ready to use. ILcdStatusListener(s) need
to be added to make it useful.public TLcdStatusInputStreamFactory(ILcdInputStreamFactory aInputStreamFactory)
TLcdStatusInputStreamFactory that delegates the creation of the actual
InputStream to the given ILcdInputStreamFactory.aInputStreamFactory - The factory to delegate the creation of the actual InputStreams to.public TLcdStatusInputStreamFactory(ILcdInputStreamFactory aInputStreamFactory, String aMessage)
TLcdStatusInputStreamFactory for the given ILcdInputStreamFactory
that produces TLcdStatusEvents with the given message.aInputStreamFactory - The factory to delegate the creation of the actual InputStreams to.aMessage - Message to be used in the TLcdStatusEvents. {0} is replaced with the source name (as
provided to createInputStream), {1} is replaced with the percentage of completion (the % sign is added
automatically), or with '?' if no prediction of completion is available. It is allowed to omit one or both of
these replacements. Note that the message is used as a pattern for MessageFormat, so for example
single quotes need to be escaped by writing them twice. For example, the message:
"Reading ''{0}'' ... {1} done"
would result in:
"Reading 'someFile.shp' ... 5% done"The message:
"Reading [{0}] ..."
would result in:
"Reading [someFile.shp] ..."
public TLcdStatusInputStreamFactory(ILcdInputStreamFactory aInputStreamFactory, Format aMessageFormat)
TLcdStatusInputStreamFactory for the given ILcdInputStreamFactory
that produces TLcdStatusEvents with messages formatted by the given message format.aInputStreamFactory - The factory to delegate the creation of the actual InputStreams to.aMessageFormat - The Format used to create the messages for the TLcdStatusEvents.
When formatting, an array of two parameters is given. One String that equals the source name as
provided in createInputStream, the second parameter is the percentage of completion as a
Double in the interval [0,1]. One could for example create a usable format like this:
MessageFormat mf = new MessageFormat( "Reading [{0}] ... {1} done" );
mf.setFormat( 1, NumberFormat.getPercentInstance() );
new MessageFormat( "Reading [{0}] ..." )
public TLcdStatusInputStreamFactory(ILcdInputStreamFactory aInputStreamFactory, Format aStartBusyMessageFormat, Format aProgressMessageFormat, Format aEndBusyMessageFormat)
TLcdStatusInputStreamFactory for the given ILcdInputStreamFactory
that produces TLcdStatusEvents with messages formatted by the given message formats.
All messages are defined identical to that of
TLcdStatusInputStreamFactory(ILcdInputStreamFactory, java.text.Format).aInputStreamFactory - The factory to delegate the creation of the actual InputStreams to.aStartBusyMessageFormat - The Format used to create the message for the START_BUSY
TLcdStatusEvent.
The message is defined identical as in the other
constructor.aProgressMessageFormat - The Format used to create the message for the PROGRESS
TLcdStatusEvent.
The message is defined identical as in the other
constructor.aEndBusyMessageFormat - The Format used to create the message for the END_BUSY
TLcdStatusEvent.
The message is defined identical as in the other
constructor.public void addStatusEventListener(ILcdStatusListener aStatusListener)
ILcdStatusListener to this TLcdStatusInputStreamFactory. As a result,
all InputStreams created afterwards inform this listener about the made progress.aStatusListener - The listener to add.addStatusListener(com.luciad.util.ILcdStatusListener)public void removeStatusEventListener(ILcdStatusListener aStatusListener)
ILcdStatusListener from this TLcdStatusInputStreamFactory.aStatusListener - The listener to remove.removeStatusListener(com.luciad.util.ILcdStatusListener)public void addStatusListener(ILcdStatusListener aListener)
ILcdStatusSourceRegisters the given listener so it will receive status events from this source.
In case you need to register a listener which keeps a reference to an object with a shorter life-time than this status source,
you can use a ALcdWeakStatusListener instance as status listener.
addStatusListener in interface ILcdStatusSourceaListener - The listener to be notified when the status has changed.public void removeStatusListener(ILcdStatusListener aListener)
ILcdStatusSourceremoveStatusListener in interface ILcdStatusSourceaListener - The listener to remove.public String[] getExcludedSources()
TLcdStatusEvents.TLcdStatusEvents.setExcludedSources(String[])public void setExcludedSources(String[] aExcludedSources)
createInputStream) that must be excluded. If a source
name is excluded, a regular InputStream is created, instead of one that produces
TLcdStatusEvents. This can be convenient to for example avoid reporting progress about an
accompanying file, such as a .ref (Luciad reference) or a .dbf file (attributes of a shp
file).aExcludedSources - The array of regular expressions (case insensitive) that makes up the exclude list. It must
not be null. Use for example this array to exclude all source names that end with .ref
or with .dbf:
new String[]{".\*\.ref", ".\*\.dbf"}
java.util.regex.Pattern for a description of regular expressions.public boolean isBlockingHint()
Returns the blocking hint that is present in the TLcdStatusEvents that are
fired to the associated ILcdStatusListeners.
Default is true.
setBlockingHint(boolean),
TLcdStatusEvent.isBlockingHint()public void setBlockingHint(boolean aBlockingHint)
Sets the blocking hint that is present in the TLcdStatusEvents that are fired
to the associated ILcdStatusListeners.
aBlockingHint - True to suggest blocking, false to suggest non-blocking.isBlockingHint(),
TLcdStatusEvent.setBlockingHint(boolean)public InputStream createInputStream(String aSourceName) throws IOException
ILcdInputStreamFactoryInputStream from aSource.createInputStream in interface ILcdInputStreamFactoryaSourceName - an accessible data source.InputStream from the data source.IOException - when aSource is not accepted by canCreateInputStream or is not accessible.ILcdInputStreamFactory.canCreateInputStream(String)