/*******************************************************************************
* Copyright Technophobia Ltd 2012
*
* This file is part of the Substeps Eclipse Plugin.
*
* The Substeps Eclipse Plugin is free software: you can redistribute it and/or modify
* it under the terms of the Eclipse Public License v1.0.
*
* The Substeps Eclipse Plugin 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
* Eclipse Public License for more details.
*
* You should have received a copy of the Eclipse Public License
* along with the Substeps Eclipse Plugin. If not, see <http://www.eclipse.org/legal/epl-v10.html>.
******************************************************************************/
package com.technophobia.eclipse.ui.render;
import com.technophobia.eclipse.ui.NotifyingUiUpdater;
import com.technophobia.eclipse.ui.Renderer;
public class OneTimeRenderUpdater<T> implements NotifyingUiUpdater<T> {
private T item;
private final Renderer<T> renderer;
public OneTimeRenderUpdater(final Renderer<T> renderer) {
this.renderer = renderer;
}
@Override
public void notify(final T t) {
this.item = t;
}
@Override
public void doUpdate() {
if (item != null) {
renderer.render(item);
item = null;
}
}
@Override
public void reset() {
item = null;
}
@Override
public T currentValue() {
return item;
}
}