/*
* Copyright 2009 ZXing authors
*
* 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.zxing.oned;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import java.util.Map;
/**
* This object renders an EAN8 code as a {@link BitMatrix}.
*
* @author aripollak@gmail.com (Ari Pollak)
*/
public final class EAN8Writer extends UPCEANWriter {
private static final int CODE_WIDTH = 3 + // start guard
(7 * 4) + // left bars
5 + // middle guard
(7 * 4) + // right bars
3; // end guard
@Override
public BitMatrix encode(String contents,
BarcodeFormat format,
int width,
int height,
Map<EncodeHintType,?> hints) throws WriterException {
if (format != BarcodeFormat.EAN_8) {
throw new IllegalArgumentException("Can only encode EAN_8, but got "
+ format);
}
return super.encode(contents, format, width, height, hints);
}
/**
* @return a byte array of horizontal pixels (false = white, true = black)
*/
@Override
public boolean[] encode(String contents) {
if (contents.length() != 8) {
throw new IllegalArgumentException(
"Requested contents should be 8 digits long, but got " + contents.length());
}
boolean[] result = new boolean[CODE_WIDTH];
int pos = 0;
pos += appendPattern(result, pos, UPCEANReader.START_END_PATTERN, true);
for (int i = 0; i <= 3; i++) {
int digit = Integer.parseInt(contents.substring(i, i + 1));
pos += appendPattern(result, pos, UPCEANReader.L_PATTERNS[digit], false);
}
pos += appendPattern(result, pos, UPCEANReader.MIDDLE_PATTERN, false);
for (int i = 4; i <= 7; i++) {
int digit = Integer.parseInt(contents.substring(i, i + 1));
pos += appendPattern(result, pos, UPCEANReader.L_PATTERNS[digit], true);
}
pos += appendPattern(result, pos, UPCEANReader.START_END_PATTERN, true);
return result;
}
}