package org.yzh.protocol.commons;
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import io.github.yezhihao.protostar.annotation.Message;
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import io.github.yezhihao.protostar.util.ClassUtils;
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import org.yzh.protocol.basics.JTMessage;
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import java.lang.reflect.Field;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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/**
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* @author yezhihao
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* https://gitee.com/yezhihao/jt808-server
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*/
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public class MessageId {
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private static final Map<Integer, String> messageId = new HashMap<>(256);
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private static final Map<Integer, Class> messageClass = new HashMap<>(256);
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static {
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for (Class clazz : new Class[]{JT808.class, JT1078.class, JSATL12.class}) {
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Field[] fields = clazz.getFields();
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for (Field field : fields) {
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try {
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if (!Integer.TYPE.isAssignableFrom(field.getType()))
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continue;
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int id = field.getInt(null);
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String hexId = leftPad(Integer.toHexString(id), 4, '0');
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String name = field.getName();
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messageId.put(id, "[" + hexId + "]" + name);
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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}
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List<Class> classList = ClassUtils.getClassList("org.yzh.protocol");
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for (Class<?> clazz : classList) {
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Message annotation = clazz.getAnnotation(Message.class);
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if (annotation != null) {
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int[] value = annotation.value();
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for (int i : value) {
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messageClass.put(i, clazz);
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}
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}
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}
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}
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public static Class<JTMessage> getClass(Integer id) {
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return messageClass.get(id);
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}
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public static String getName(int id) {
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String name = messageId.get(id);
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if (name != null) {
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return name;
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}
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return leftPad(Integer.toHexString(id), 4, '0');
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}
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public static String leftPad(String str, int size, char ch) {
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int length = str.length();
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int pads = size - length;
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if (pads > 0) {
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char[] result = new char[size];
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str.getChars(0, length, result, pads);
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while (pads > 0)
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result[--pads] = ch;
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return new String(result);
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}
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return str;
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}
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}
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