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