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package com.firefly.utils.json.parser;

import com.firefly.utils.json.JsonReader;
import com.firefly.utils.json.Parser;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class EnumParser implements Parser {

    private EnumObj[] enumObjs;

    public EnumParser(Class clazz) {
        List list = new ArrayList<>();
        Object[] o = clazz.getEnumConstants();
        enumObjs = new EnumObj[o.length];
        for (Object o1 : o) {
            EnumObj enumObj = new EnumObj();
            enumObj.e = o1;
            enumObj.key = ((Enum) o1).name().toCharArray();
            list.add(enumObj);
        }
        list.toArray(enumObjs);
    }

    @Override
    public Object convertTo(JsonReader reader, Class clazz) {
        return find(reader.readChars());
    }

    private Object find(char[] key) {
        for (EnumObj eo : enumObjs) {
            if (Arrays.equals(eo.key, key))
                return eo.e;
        }
        return null;
    }

    private class EnumObj {
        Object e;
        char[] key;
    }

}