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ZXingResult.java
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package act.view;
/*-
* #%L
* ACT Framework
* %%
* Copyright (C) 2014 - 2017 ActFramework
* %%
* 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.
* #L%
*/
import act.Act;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import org.osgl.$;
import org.osgl.http.H;
import org.osgl.mvc.result.Result;
import org.osgl.util.E;
import org.osgl.util.IO;
import org.osgl.util.S;
import java.util.HashMap;
import java.util.Map;
public class ZXingResult extends Result {
private BarcodeFormat barcodeFormat;
private ErrorCorrectionLevel errorCorrectionLevel;
private int width;
private int height;
public ZXingResult(String content) {
this(content, BarcodeFormat.QR_CODE);
}
public ZXingResult(String content, BarcodeFormat barcodeFormat) {
this(content, barcodeFormat, null);
}
public ZXingResult(String content, BarcodeFormat barcodeFormat, ErrorCorrectionLevel errorCorrectionLevel) {
super(H.Status.OK, content);
this.barcodeFormat = $.notNull(barcodeFormat);
this.errorCorrectionLevel = errorCorrectionLevel;
setDefaultDimension();
}
public ZXingResult width(int width) {
this.width = width;
return this;
}
public ZXingResult height(int height) {
this.height = height;
return this;
}
public ZXingResult errorCorrectionLevel(ErrorCorrectionLevel level) {
this.errorCorrectionLevel = level;
return this;
}
public ZXingResult barCodeFormat(BarcodeFormat format) {
this.barcodeFormat = format;
return this;
}
@Override
protected void applyMessage(H.Request request, H.Response response) {
String msg = this.getMessage();
this.applyBeforeCommitHandler(request, response);
if(S.notBlank(msg)) {
renderCode(response);
} else {
IO.close(response.outputStream());
}
this.applyAfterCommitHandler(request, response);
}
protected ErrorCorrectionLevel errorCorrectionLevel() {
return errorCorrectionLevel;
}
protected BarcodeFormat barcodeFormat() {
return barcodeFormat;
}
private void setDefaultDimension() {
if (barcodeFormat() == BarcodeFormat.QR_CODE) {
width = 128;
height = 128;
} else {
width = 128;
height = 96;
}
}
private void renderCode(H.Response response) {
response.contentType("image/png");
Map<EncodeHintType, Object> hints = new HashMap<>();
hints.put(EncodeHintType.CHARACTER_SET, Act.appConfig().encoding());
hints.put(EncodeHintType.MARGIN, 0);
ErrorCorrectionLevel level = errorCorrectionLevel();
if (null != level) {
hints.put(EncodeHintType.ERROR_CORRECTION, level);
}
MultiFormatWriter writer = new MultiFormatWriter();
try {
BitMatrix bitMatrix = writer.encode(getMessage(), barcodeFormat(), width, height, hints);
MatrixToImageWriter.writeToStream(bitMatrix, "png", response.outputStream());
} catch (Exception e) {
throw E.unexpected(e);
}
}
public static ZXingResult barcode(String content) {
return new ZXingResult(content, BarcodeFormat.CODE_128);
}
public static ZXingResult qrcode(String content) {
return new ZXingResult(content, BarcodeFormat.QR_CODE);
}
}