com.phloc.commons.state.EChange Maven / Gradle / Ivy
/**
* Copyright (C) 2006-2015 phloc systems
* http://www.phloc.com
* office[at]phloc[dot]com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.phloc.commons.state;
import javax.annotation.Nonnull;
/**
* Small enum for setter method to identify whether a value has changed or not.
*
* @author Philip Helger
*/
public enum EChange implements IChangeIndicator
{
CHANGED,
UNCHANGED;
public boolean isChanged ()
{
return this == CHANGED;
}
public boolean isUnchanged ()
{
return this == UNCHANGED;
}
@Nonnull
public EChange or (@Nonnull final IChangeIndicator aChange)
{
return valueOf (isChanged () || aChange.isChanged ());
}
@Nonnull
public EChange and (@Nonnull final IChangeIndicator aChange)
{
return valueOf (isChanged () && aChange.isChanged ());
}
@Nonnull
public static EChange valueOf (final boolean bChanged)
{
return bChanged ? CHANGED : UNCHANGED;
}
@Nonnull
public static EChange valueOf (@Nonnull final IChangeIndicator aChangeIndicator)
{
return valueOf (aChangeIndicator.isChanged ());
}
}