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104 lines
3.3 KiB
104 lines
3.3 KiB
/*
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* Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.arialyy.aria.util;
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import android.text.TextUtils;
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import android.util.Log;
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import com.arialyy.aria.core.DownloadEntity;
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import com.arialyy.aria.exception.FileException;
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import java.io.File;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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/**
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* Created by Lyy on 2016/9/23.
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* 检查帮助类
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*/
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public class CheckUtil {
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private static final String TAG = "CheckUtil";
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public static void checkNull(Object obj) {
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if (obj == null) throw new IllegalArgumentException("不能传入空对象");
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}
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/**
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* 检查sql的expression是否合法
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*/
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public static void checkSqlExpression(String... expression) {
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if (expression.length == 0) {
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throw new IllegalArgumentException("sql语句表达式不能为null");
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}
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if (expression.length == 1) {
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throw new IllegalArgumentException("表达式需要写入参数");
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}
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String where = expression[0];
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if (!where.contains("?")) {
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throw new IllegalArgumentException("请在where语句的'='后编写?");
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}
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Pattern pattern = Pattern.compile("\\?");
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Matcher matcher = pattern.matcher(where);
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int count = 0;
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while (matcher.find()) {
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count++;
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}
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if (count < expression.length - 1){
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throw new IllegalArgumentException("条件语句的?个数不能小于参数个数");
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}
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if (count > expression.length - 1){
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throw new IllegalArgumentException("条件语句的?个数不能大于参数个数");
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}
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}
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/**
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* 检测下载链接是否为null
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*/
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public static void checkDownloadUrl(String downloadUrl) {
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if (TextUtils.isEmpty(downloadUrl)) throw new IllegalArgumentException("下载链接不能为null");
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}
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/**
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* 检测下载实体是否合法
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*
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* @param entity 下载实体
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* @return 合法(true)
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*/
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public static boolean checkDownloadEntity(DownloadEntity entity) {
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if (entity == null) {
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Log.w(TAG, "下载实体不能为空");
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return false;
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} else if (TextUtils.isEmpty(entity.getDownloadUrl())) {
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Log.w(TAG, "下载链接不能为空");
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return false;
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} else if (TextUtils.isEmpty(entity.getFileName())) {
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//Log.w(TAG, "文件名不能为空");
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throw new FileException("文件名不能为null");
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} else if (TextUtils.isEmpty(entity.getDownloadPath())) {
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throw new FileException("文件保存路径不能为null");
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}
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String fileName = entity.getFileName();
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if (fileName.contains(" ")) {
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fileName = fileName.replace(" ", "_");
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}
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String dPath = entity.getDownloadPath();
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File file = new File(dPath);
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if (file.isDirectory()) {
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dPath += fileName;
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entity.setDownloadPath(dPath);
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}
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return true;
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}
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} |