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/*
* The MIT License (MIT)
*
* Copyright (c) 2014-2017 Sri Harsha Chilakapati
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.shc.silenceengine.backend.gwt;
import com.google.gwt.xhr.client.XMLHttpRequest;
import com.shc.silenceengine.core.SilenceException;
import com.shc.silenceengine.io.DirectBuffer;
import com.shc.silenceengine.io.FilePath;
import com.shc.silenceengine.io.FileReader;
import com.shc.silenceengine.utils.functional.UniCallback;
/**
* @author Sri Harsha Chilakapati
*/
class GwtFileReader extends FileReader
{
@Override
public void readBinaryFile(FilePath file, UniCallback<DirectBuffer> onComplete, UniCallback<Throwable> onError)
{
// Create a XMLHttpRequest to load the file into a direct buffer
XMLHttpRequest request = XMLHttpRequest.create();
request.open("GET", file.getAbsolutePath());
// Set to read as ArrayBuffer and attach a handler
request.setResponseType(XMLHttpRequest.ResponseType.ArrayBuffer);
request.setOnReadyStateChange(xhr ->
{
if (request.getReadyState() == XMLHttpRequest.DONE)
{
if (request.getStatus() == 200)
// Invoke the onComplete handler
onComplete.invoke(new GwtDirectBuffer(request.getResponseArrayBuffer()));
else
onError.invoke(new SilenceException("Error fetching the file: " + request.getStatusText()));
}
});
// Send the request
request.send();
}
@Override
public void readTextFile(FilePath file, UniCallback<String> onComplete, UniCallback<Throwable> onError)
{
// Create a XMLHttpRequest to load the file into a direct buffer
XMLHttpRequest request = XMLHttpRequest.create();
request.open("GET", file.getAbsolutePath());
// Set to read as default mode and attach a handler
request.setResponseType(XMLHttpRequest.ResponseType.Default);
request.setOnReadyStateChange(xhr ->
{
if (request.getReadyState() == XMLHttpRequest.DONE)
{
if (request.getStatus() == 200)
// Invoke the onComplete handler
onComplete.invoke(request.getResponseText());
else
onError.invoke(new SilenceException("Error fetching the file: " + request.getStatusText()));
}
});
// Send the request
request.send();
}
}
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