com.google.gwt.language.client.translation.LangDetCallback.java Source code

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Here is the source code for com.google.gwt.language.client.translation.LangDetCallback.java

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/*
 * Copyright 2009 Google Inc.
 * 
 * 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.gwt.language.client.translation;

import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.GWT.UncaughtExceptionHandler;

/**
 * Callback for language detection api. The onCallback() method must be
 * overridden by clients.
 */
public abstract class LangDetCallback {

    /**
     * This wraps onCallback method and provides a framework for catching
     * exceptions in callbacks.
     * 
     * @param result the result of a language detection request.
     */
    public final void onCallbackWrapper(LangDetResult result) {
        UncaughtExceptionHandler exceptionHandler = GWT.getUncaughtExceptionHandler();
        if (exceptionHandler != null) {
            try {
                onCallback(result);
            } catch (Exception e) {
                exceptionHandler.onUncaughtException(e);
            }
        } else {
            onCallback(result);
        }
    }

    /**
     * This must be overridden by the client to deal with asynchronous feedback
     * containing language detection results.
     * 
     * @param result the result of a language detection request.
     */
    protected abstract void onCallback(LangDetResult result);
}