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/*******************************************************************************
* Copyright (c) 2016 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.common.utility.internal.model.value;
import org.eclipse.jpt.common.utility.closure.Closure;
import org.eclipse.jpt.common.utility.internal.ObjectTools;
/**
* This class adds support for plugging in a closure that can be used to set
* the model's value.
* <p>
* This class is most useful when the adapted model is changed <em>outside</em>
* the property value model; typically by modifying the original
* <em>domain</em> model.
*
* @param <V> the type of the model's derived value
*/
public final class PluggableModifiablePropertyValueModelAdapter<V>
implements PluggableModifiablePropertyValueModel.Adapter<V>
{
/** Read the adapted model with this. */
private final BasePluggablePropertyValueModel.Adapter<V> adapter;
/** Write the adapted model with this. */
private final Closure<? super V> closure;
public PluggableModifiablePropertyValueModelAdapter(BasePluggablePropertyValueModel.Adapter<V> adapter, Closure<? super V> closure) {
super();
if (adapter == null) {
throw new NullPointerException();
}
this.adapter = adapter;
if (closure == null) {
throw new NullPointerException();
}
this.closure = closure;
}
public V engageModel() {
return this.adapter.engageModel();
}
public V disengageModel() {
return this.adapter.disengageModel();
}
public void setValue(V value) {
this.closure.execute(value);
}
@Override
public String toString() {
return ObjectTools.toString(this, this.adapter);
}
// ********** Factory **********
public static final class Factory<V>
implements PluggableModifiablePropertyValueModel.Adapter.Factory<V>
{
private final BasePluggablePropertyValueModel.Adapter.Factory<V, ? extends BasePluggablePropertyValueModel.Adapter<V>> factory;
private final Closure<? super V> closure;
public Factory(BasePluggablePropertyValueModel.Adapter.Factory<V, ? extends BasePluggablePropertyValueModel.Adapter<V>> factory, Closure<? super V> closure) {
super();
if (factory == null) {
throw new NullPointerException();
}
this.factory = factory;
if (closure == null) {
throw new NullPointerException();
}
this.closure = closure;
}
public PluggableModifiablePropertyValueModel.Adapter<V> buildAdapter(BasePluggablePropertyValueModel.Adapter.Listener<V> listener) {
return new PluggableModifiablePropertyValueModelAdapter<>(this.factory.buildAdapter(listener), this.closure);
}
@Override
public String toString() {
return ObjectTools.toString(this);
}
}
}
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