VisibilityQueryImplementation (NetBeans General Queries API) - NetBeans API Javadoc 4.1.0

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org.netbeans.spi.queries
Interface VisibilityQueryImplementation

public interface VisibilityQueryImplementation

Determine whether files should be hidden in views presented to the user.

Global lookup is used to find all instances of VisibilityQueryImplementation.

Threading note: implementors should avoid acquiring locks that might be held by other threads. Generally treat this interface similarly to SPIs in org.openide.filesystems with respect to threading semantics.

See Also:: VisibilityQuery

Method Summary

void addChangeListener(ChangeListener l)
          Add a listener to changes.

boolean isVisible(FileObject file)
          Check whether a file is recommended to be visible.

void removeChangeListener(ChangeListener l)
          Stop listening to changes.

Method Detail

isVisible

public boolean isVisible(FileObject file)

Check whether a file is recommended to be visible.

Parameters:: file - a file to considered
Returns:: true if it is recommended to display this file

addChangeListener

public void addChangeListener(ChangeListener l)

Add a listener to changes.

Parameters:: l - a listener to add

removeChangeListener

public void removeChangeListener(ChangeListener l)

Stop listening to changes.

Parameters:: l - a listener to remove