/*************************************************************************
* Copyright 2009-2015 Eucalyptus Systems, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*
* Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
* CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
* additional information or have any questions.
*
* This file may incorporate work covered under the following copyright
* and permission notice:
*
* Software License Agreement (BSD License)
*
* Copyright (c) 2008, Regents of the University of California
* All rights reserved.
*
* Redistribution and use of this software in source and binary forms,
* with or without modification, are permitted provided that the
* following conditions are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE. USERS OF THIS SOFTWARE ACKNOWLEDGE
* THE POSSIBLE PRESENCE OF OTHER OPEN SOURCE LICENSED MATERIAL,
* COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS SOFTWARE,
* AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING
* IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA,
* SANTA BARBARA WHO WILL THEN ASCERTAIN THE MOST APPROPRIATE REMEDY,
* WHICH IN THE REGENTS' DISCRETION MAY INCLUDE, WITHOUT LIMITATION,
* REPLACEMENT OF THE CODE SO IDENTIFIED, LICENSING OF THE CODE SO
* IDENTIFIED, OR WITHDRAWAL OF THE CODE CAPABILITY TO THE EXTENT
* NEEDED TO COMPLY WITH ANY SUCH LICENSES OR RIGHTS.
************************************************************************/
package com.eucalyptus.configurable;
import com.eucalyptus.configurable.PropertyDirectory.NoopEventListener;
import com.google.common.cache.CacheBuilderSpec;
import com.google.common.primitives.Ints;
import org.apache.log4j.Logger;
public class PropertyChangeListeners {
public static final Logger LOG = Logger.getLogger(PropertyChangeListener.class);
public enum IsPositiveInteger implements PropertyChangeListener {
INSTANCE;
@SuppressWarnings( "unchecked" )
@Override
public void fireChange( final ConfigurableProperty t, final Object newValue ) throws ConfigurablePropertyException {
Object numberValue = newValue;
if ( numberValue instanceof String ) {
numberValue = Ints.tryParse( String.valueOf( numberValue ) );
}
if ( numberValue != null && Number.class.isAssignableFrom( numberValue.getClass( ) ) ) {
final Number numElem = ( Number ) numberValue;
if ( numElem.longValue( ) > 0 ) {
return;
}
}
throw new ConfigurablePropertyException( "Value must be an integer greater than zero" );
}
}
public enum IsNonNegativeInteger implements PropertyChangeListener {
INSTANCE;
@SuppressWarnings( "unchecked" )
@Override
public void fireChange( final ConfigurableProperty t, final Object newValue ) throws ConfigurablePropertyException {
Object numberValue = newValue;
if ( numberValue instanceof String ) {
numberValue = Ints.tryParse( String.valueOf( numberValue ) );
}
if ( numberValue != null && Number.class.isAssignableFrom( numberValue.getClass( ) ) ) {
final Number numElem = ( Number ) numberValue;
if ( numElem.longValue( ) >= 0 ) {
return;
}
}
throw new ConfigurablePropertyException( "Value must be an integer greater than or equal to zero" );
}
}
public enum IsBoolean implements PropertyChangeListener {
INSTANCE;
@SuppressWarnings( "unchecked" )
@Override
public void fireChange( final ConfigurableProperty t, final Object newValue ) throws ConfigurablePropertyException {
String lowerValue = newValue.toString().toLowerCase();
if ( !"true".equals(lowerValue) && !"false".equals(lowerValue)) {
throw new ConfigurablePropertyException( "Value must be 'true' or 'false'" );
}
}
}
public static class CacheSpecListener implements PropertyChangeListener {
@Override
public void fireChange( final ConfigurableProperty t, final Object newValue ) throws ConfigurablePropertyException {
try {
CacheBuilderSpec.parse( String.valueOf( newValue ) );
} catch ( Exception e ) {
throw new ConfigurablePropertyException( e.getMessage( ) );
}
}
}
public static PropertyChangeListener getListenerFromClass( Class<? extends PropertyChangeListener> changeListenerClass ) {
PropertyChangeListener changeListener;
if ( !changeListenerClass.equals( NoopEventListener.class ) ) {
if ( changeListenerClass.isEnum( ) ) {
changeListener = changeListenerClass.getEnumConstants( )[0];
} else {
try {
changeListener = changeListenerClass.newInstance( );
} catch ( Throwable e ) {
LOG.error("Can't set listener to " + changeListenerClass);
LOG.error(e, e);
changeListener = NoopEventListener.NOOP;
}
}
} else {
changeListener = NoopEventListener.NOOP;
}
LOG.debug("Property change listener set to: " + changeListener.getClass());
return changeListener;
}
}