it.tidalwave.role.ui.function.UnaryBoundFunctionSupport Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of it-tidalwave-util-java8supplement Show documentation
There is a newer version: 3.1-ALPHA-7
Show newest version
/*
 * #%L
 * *********************************************************************************************************************
 * 
 * These Foolish Things - Miscellaneous utilities
 * http://thesefoolishthings.tidalwave.it - git clone [email protected]:tidalwave/thesefoolishthings-src.git
 * %%
 * Copyright (C) 2009 - 2016 Tidalwave s.a.s. (http://tidalwave.it)
 * %%
 * *********************************************************************************************************************
 * 
 * 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.
 * 
 * *********************************************************************************************************************
 * 
 * $Id$
 * 
 * *********************************************************************************************************************
 * #L%
 */
package it.tidalwave.role.ui.function;

import javax.annotation.Nonnull;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import it.tidalwave.role.ui.ChangingSource;

/***********************************************************************************************************************
 *
 * @author  Fabrizio Giudici
 * @version $Id$
 *
 **********************************************************************************************************************/
public abstract class UnaryBoundFunctionSupport
                   extends BoundFunctionSupport
  {
    @Nonnull
    protected final ChangingSource source;

    protected CODOMAIN_TYPE value;

    protected UnaryBoundFunctionSupport (final @Nonnull ChangingSource source)
      {
        this.source = source;
        source.addPropertyChangeListener(new PropertyChangeListener()
          {
            @Override
            public void propertyChange (final @Nonnull PropertyChangeEvent event)
              {
                onSourceChange((DOMAIN_TYPE)event.getOldValue(), (DOMAIN_TYPE)event.getNewValue());
              }
          });
      }

    protected void onSourceChange (final @Nonnull DOMAIN_TYPE oldSourceValue, final @Nonnull DOMAIN_TYPE newSourceValue)
      {
        final CODOMAIN_TYPE oldValue = function(oldSourceValue);
        value = function(newSourceValue);
        fireValueChanged(oldValue, value);
      }

    @Nonnull
    protected abstract CODOMAIN_TYPE function (final DOMAIN_TYPE value);

    @Override @Nonnull
    public final CODOMAIN_TYPE get()
      {
        return value;
      }
  }