com.emv.qrcode.decoder.cpm.DecodeCpmIterator Maven / Gradle / Ivy
package com.emv.qrcode.decoder.cpm;
import java.util.Iterator;
import java.util.NoSuchElementException;
import java.util.function.Consumer;
import com.emv.qrcode.core.utils.BERUtils;
// @formatter:off
final class DecodeCpmIterator implements Iterator {
private Integer current;
private final Integer max;
private final byte[] source;
public DecodeCpmIterator(final byte[] source) {
current = 0;
max = source.length;
this.source = source;
}
@Override
public boolean hasNext() {
if (current >= max) {
return false;
}
final Integer countBytesOfTag = BERUtils.countBytesOfTag(source, current);
final Integer countBytesOfLength = BERUtils.countBytesOfLength(source, current);
final Integer valueLength = BERUtils.valueOfLength(source, current);
return current + countBytesOfTag + countBytesOfLength + valueLength <= max;
}
@Override
public void forEachRemaining(final Consumer action) {
while (hasNext()) {
action.accept(next());
}
}
@Override
public byte[] next() {
if(!hasNext()){
throw new NoSuchElementException();
}
final byte[] value = BERUtils.chunk(source, current);
current += value.length;
return value;
}
}
// @formatter:on