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package com.alibaba.fastjson2.reader;

import com.alibaba.fastjson2.JSONException;
import com.alibaba.fastjson2.JSONReader;
import com.alibaba.fastjson2.function.ObjCharConsumer;
import com.alibaba.fastjson2.schema.JSONSchema;

import java.lang.reflect.Method;

final class FieldReaderCharValueFunc
        extends FieldReader {
    final ObjCharConsumer function;

    FieldReaderCharValueFunc(
            String fieldName,
            int ordinal,
            String format,
            Character defaultValue,
            JSONSchema schema,
            Method method,
            ObjCharConsumer function
    ) {
        super(fieldName, char.class, char.class, ordinal, 0, format, null, defaultValue, schema, method, null);
        this.function = function;
    }

    @Override
    public void accept(T object, char value) {
        function.accept(object, value);
    }

    @Override
    public void accept(T object, Object value) {
        char charValue;
        if (value instanceof String) {
            charValue = ((String) value).charAt(0);
        } else if (value instanceof Character) {
            charValue = (Character) value;
        } else {
            throw new JSONException("cast to char error");
        }
        accept(object, charValue);
    }

    @Override
    public void readFieldValue(JSONReader jsonReader, T object) {
        char ch = jsonReader.readCharValue();
        if (ch == '\0' && jsonReader.wasNull()) {
            return;
        }
        function.accept(object, ch);
    }

    @Override
    public String readFieldValue(JSONReader jsonReader) {
        return jsonReader.readString();
    }
}