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jeremybenn |
/* PreciseFilter.java -- filter log messages by precise level.
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Copyright (C) 2005 Free Software Foundation, Inc.
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This file is a part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or (at
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your option) any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under terms
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of your choice, provided that you also meet, for each linked independent
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module, the terms and conditions of the license of that module. An
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independent module is a module which is not derived from or based on
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this library. If you modify this library, you may extend this exception
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to your version of the library, but you are not obligated to do so. If
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you do not wish to do so, delete this exception statement from your
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version. */
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package gnu.classpath.debug;
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import java.util.BitSet;
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import java.util.logging.Filter;
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import java.util.logging.LogRecord;
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public final class PreciseFilter implements Filter
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{
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/**
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* The singleton filter instance.
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*/
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public static final PreciseFilter GLOBAL = new PreciseFilter ();
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private final BitSet enabled;
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private PreciseFilter ()
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{
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enabled = new BitSet ();
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}
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/**
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* Disable logging of a component.
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*
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* @param component The component to disable logging for.
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* @throws NullPointerException If component is null.
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*/
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public void disable (final Component component)
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{
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enabled.clear (component.startIndex (), component.endIndex ());
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}
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/**
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* Enable logging of a component.
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*
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* @param component The component to enable logging for.
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* @throws NullPointerException If component is null.
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*/
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public void enable (final Component component)
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{
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enabled.set (component.startIndex (), component.endIndex ());
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}
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/**
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* Tell if a component is enabled for logging.
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*
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* @param component The component to test.
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* @return True iff the specified component is enabled for logging.
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* @throws NullPointerException If component is null.
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*/
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public boolean isEnabled (final Component component)
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{
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return (enabled.get (component.startIndex ()));
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}
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public boolean isLoggable (final LogRecord record)
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{
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try
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{
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return isEnabled ((Component) record.getLevel ());
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}
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catch (ClassCastException cce)
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{
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return true;
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}
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}
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}
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