com.google.zxing.pdf417.decoder.DetectionResultColumn Maven / Gradle / Ivy
/*
* Copyright 2013 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.pdf417.decoder;
import java.util.Formatter;
/**
* @author Guenther Grau
*/
class DetectionResultColumn {
private static final int MAX_NEARBY_DISTANCE = 5;
private final BoundingBox boundingBox;
private final Codeword[] codewords;
DetectionResultColumn(BoundingBox boundingBox) {
this.boundingBox = new BoundingBox(boundingBox);
codewords = new Codeword[boundingBox.getMaxY() - boundingBox.getMinY() + 1];
}
final Codeword getCodewordNearby(int imageRow) {
Codeword codeword = getCodeword(imageRow);
if (codeword != null) {
return codeword;
}
for (int i = 1; i < MAX_NEARBY_DISTANCE; i++) {
int nearImageRow = imageRowToCodewordIndex(imageRow) - i;
if (nearImageRow >= 0) {
codeword = codewords[nearImageRow];
if (codeword != null) {
return codeword;
}
}
nearImageRow = imageRowToCodewordIndex(imageRow) + i;
if (nearImageRow < codewords.length) {
codeword = codewords[nearImageRow];
if (codeword != null) {
return codeword;
}
}
}
return null;
}
final int imageRowToCodewordIndex(int imageRow) {
return imageRow - boundingBox.getMinY();
}
final void setCodeword(int imageRow, Codeword codeword) {
codewords[imageRowToCodewordIndex(imageRow)] = codeword;
}
final Codeword getCodeword(int imageRow) {
return codewords[imageRowToCodewordIndex(imageRow)];
}
final BoundingBox getBoundingBox() {
return boundingBox;
}
final Codeword[] getCodewords() {
return codewords;
}
@Override
public String toString() {
try (Formatter formatter = new Formatter()) {
int row = 0;
for (Codeword codeword : codewords) {
if (codeword == null) {
formatter.format("%3d: | %n", row++);
continue;
}
formatter.format("%3d: %3d|%3d%n", row++, codeword.getRowNumber(), codeword.getValue());
}
return formatter.toString();
}
}
}