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package com.alibaba.fastjson2.function.impl;

import com.alibaba.fastjson2.JSONException;

import java.util.function.Function;

public final class ToNumber
        implements Function {
    final Number defaultValue;

    public ToNumber(Number defaultValue) {
        this.defaultValue = defaultValue;
    }

    @Override
    public Object apply(Object o) {
        if (o == null) {
            return defaultValue;
        }

        if (o instanceof Boolean) {
            return (Boolean) o ? 1 : 0;
        }

        if (o instanceof Number) {
            return o;
        }

        throw new JSONException("can not cast to Number " + o.getClass());
    }
}