// Copyright (C) 2008 The Android Open Source Project
//
// 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.google.gerrit.client.rpc;
import com.google.gerrit.client.Gerrit;
import com.google.gerrit.client.NotFoundScreen;
import com.google.gerrit.client.ui.Screen;
import com.google.gerrit.common.errors.NoSuchEntityException;
/** Callback switching {@link NoSuchEntityException} to {@link NotFoundScreen} */
public abstract class ScreenLoadCallback<T> extends GerritCallback<T> {
private final Screen screen;
public ScreenLoadCallback(final Screen s) {
screen = s;
}
public final void onSuccess(final T result) {
if (screen.isAttached()) {
preDisplay(result);
screen.display();
postDisplay();
}
}
protected abstract void preDisplay(T result);
protected void postDisplay() {
}
@Override
public void onFailure(final Throwable caught) {
if (isNoSuchEntity(caught)) {
Gerrit.display(screen.getToken(), new NotFoundScreen());
} else {
super.onFailure(caught);
}
}
}