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qiniu-suits is a efficient tools for qiniu api implemented by java8.

There is a newer version: 8.4.8

package com.qiniu.convert;

import com.qiniu.interfaces.IStringFormat;
import com.qiniu.interfaces.ITypeConvert;
import com.qiniu.util.JsonConvertUtils;

import java.io.IOException;
import java.util.*;

public abstract class ObjectToString implements ITypeConvert {

    protected IStringFormat stringFormatter;
    protected List errorList = new ArrayList<>();

    public String convertToV(E line) throws IOException {
        return stringFormatter.toFormatString(line);
    }

    public List convertToVList(List lineList) {
        List stringList = new ArrayList<>();
        if (lineList != null && lineList.size() > 0) {
            for (E line : lineList) {
                try {
                    stringList.add(stringFormatter.toFormatString(line));
                } catch (Exception e) {
                    errorList.add(JsonConvertUtils.toJson(line) + "\t" + e.getMessage());
                }
            }
        }
        return stringList;
    }

    public int errorSize() {
        return errorList.size();
    }

    public List consumeErrors() {
        try {
            return new ArrayList<>(errorList);
        } finally {
            errorList.clear();
        }
    }
}