DefaultPresentationModel.java
- /*
- * *************************************************************************************************************************************************************
- *
- * TheseFoolishThings: Miscellaneous utilities
- * http://tidalwave.it/projects/thesefoolishthings
- *
- * Copyright (C) 2009 - 2024 by 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.
- *
- * *************************************************************************************************************************************************************
- *
- * git clone https://bitbucket.org/tidalwave/thesefoolishthings-src
- * git clone https://github.com/tidalwave-it/thesefoolishthings-src
- *
- * *************************************************************************************************************************************************************
- */
- package it.tidalwave.role.ui.impl;
- import javax.annotation.Nonnull;
- import java.beans.PropertyChangeSupport;
- import java.util.Collection;
- import java.util.Optional;
- import it.tidalwave.util.As;
- import it.tidalwave.util.AsException;
- import it.tidalwave.util.Callback;
- import it.tidalwave.util.NamedCallback;
- import it.tidalwave.role.ui.PresentationModel;
- import lombok.ToString;
- import lombok.experimental.Delegate;
- import lombok.extern.slf4j.Slf4j;
- /***************************************************************************************************************************************************************
- *
- * A default implementation of {@link PresentationModel}.
- *
- * @author Fabrizio Giudici
- *
- **************************************************************************************************************************************************************/
- @ToString(exclude = {"as", "pcs"}) @Slf4j
- public class DefaultPresentationModel implements PresentationModel
- {
- @Nonnull
- private final Object owner;
- @Delegate
- private final PropertyChangeSupport pcs = new PropertyChangeSupport(this);
- private final As as;
- /***********************************************************************************************************************************************************
- *
- **********************************************************************************************************************************************************/
- public DefaultPresentationModel (@Nonnull final Object owner, @Nonnull final Collection<Object> roles)
- {
- this.owner = owner;
- as = As.forObject(owner, roles);
- }
- /***********************************************************************************************************************************************************
- * {@inheritDoc}
- **********************************************************************************************************************************************************/
- @Override @Nonnull
- public <T> T as (@Nonnull final Class<? extends T> roleType)
- {
- return maybeAs(roleType).orElseThrow(() -> new AsException(roleType));
- }
- /***********************************************************************************************************************************************************
- * {@inheritDoc}
- **********************************************************************************************************************************************************/
- @SuppressWarnings("ConstantValue")
- @Override @Nonnull
- public <T> Optional<T> maybeAs (@Nonnull final Class<? extends T> roleType)
- {
- // Undocumented feature: for instance Zephyr needs to fire property events
- if (roleType.equals(PropertyChangeSupport.class))
- {
- return Optional.of(roleType.cast(pcs));
- }
- final Optional<T> t = as.maybeAs(roleType);
- if (t.isPresent())
- {
- return t;
- }
- if (owner instanceof As)
- {
- try
- {
- final var role = ((As)owner).as(roleType);
- if (role != null) // do check it for improper implementations or partial mocks
- {
- return Optional.of(role);
- }
- }
- catch (AsException ignore)
- {
- // fallback
- }
- }
- return Optional.empty();
- }
- /***********************************************************************************************************************************************************
- * {@inheritDoc}
- **********************************************************************************************************************************************************/
- @Override @Nonnull
- public <T> Collection<T> asMany (@Nonnull final Class<? extends T> roleType)
- {
- final Collection<T> result = as.asMany(roleType);
- // The problem here is that we want only to add local roles in owner; but calling owner.as() will also
- // find again the global roles that were discovered by AsSupport.
- if (roleType.isAssignableFrom(owner.getClass()))
- {
- result.add(roleType.cast(owner));
- }
- if (owner instanceof As)
- {
- result.addAll(((As)owner).asMany(roleType));
- }
- return result;
- }
- /***********************************************************************************************************************************************************
- * {@inheritDoc}
- **********************************************************************************************************************************************************/
- @Override
- public void dispose()
- {
- for (final var listener : pcs.getPropertyChangeListeners().clone())
- {
- pcs.removePropertyChangeListener(listener);
- }
- asMany(NamedCallback.class).stream()
- .filter(c -> c.getName().equals(CALLBACK_DISPOSE))
- .forEach(callback -> wrap(callback, "While calling 'dispose' callbacks"));
- }
- /***********************************************************************************************************************************************************
- *
- **********************************************************************************************************************************************************/
- private static void wrap (@Nonnull final Callback callback, @Nonnull final String logMessage)
- {
- try
- {
- callback.call();
- }
- catch (Throwable t)
- {
- log.error(logMessage, t);
- }
- }
- }