146 lines
3.6 KiB
Java
146 lines
3.6 KiB
Java
/*-
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* ~~~~~~licensing~~~~~~
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* base-support
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* ==========
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* Copyright (C) 2020 - 2021 EmDev LLC
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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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* ~~~~~~/licensing~~~~~~
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*/
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package ru.entaxy.platform.base.support;
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import java.io.File;
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import java.io.IOException;
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import java.net.MalformedURLException;
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import java.nio.file.Files;
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import java.nio.file.Paths;
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import java.util.Calendar;
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import org.apache.commons.codec.digest.DigestUtils;
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public class FileUtils {
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public static class FileHelper {
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protected File file = null;
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protected String fileMd5Hash = "";
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protected String md5FilePath = "";
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protected String currentMd5 = null;
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protected String timmestampFilePath = "";
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protected String currentTimestamp = null;
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public FileHelper(String filePath) {
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this(new File(filePath));
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}
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public FileHelper(File file) {
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this.file = file;
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this.md5FilePath = file.getAbsolutePath().concat(".md5");
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this.timmestampFilePath = file.getAbsolutePath().concat(".timestamp");
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}
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public boolean isReadable() {
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return file.exists() && file.canRead();
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}
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protected String calcMd5() {
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if (!CommonUtils.isValid(this.fileMd5Hash))
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try {
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this.fileMd5Hash = DigestUtils.md2Hex(this.file.toURI().toURL().openStream());
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} catch (MalformedURLException e) {
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e.printStackTrace();
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} catch (IOException e) {
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e.printStackTrace();
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}
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return this.fileMd5Hash;
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}
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protected String readMd5() {
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if (this.currentMd5 == null)
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try {
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this.currentMd5 = Files.readString((new File(this.md5FilePath)).toPath());
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} catch (IOException e) {
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this.currentMd5 = "";
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}
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return this.currentMd5;
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}
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public boolean isChanged() {
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return !CommonUtils.isValid(this.readMd5()) || !this.readMd5().equals(this.calcMd5());
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}
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public String getTimestamp() {
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if (this.currentTimestamp == null)
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try {
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this.currentTimestamp = Files.readString((new File(this.timmestampFilePath)).toPath());
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} catch (IOException e) {
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this.currentTimestamp = "";
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}
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return this.currentTimestamp;
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}
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public String getMd5() {
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this.fileMd5Hash = "";
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return calcMd5();
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}
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public File getFile() {
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return file;
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}
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public String getFileMd5Hash() {
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return calcMd5();
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}
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public String updateMd5() {
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String result = getMd5();
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if (CommonUtils.isValid(result))
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try {
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FileUtils.string2file(result, md5FilePath);
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result = readMd5();
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} catch (IOException e) {
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result = null;
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}
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return result;
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}
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public String updateTimestamp() {
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String timestamp = Calendar.getInstance().getTimeInMillis() + "";
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String result = "";
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try {
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FileUtils.string2file(timestamp, timmestampFilePath);
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this.currentTimestamp = null;
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result = getTimestamp();
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} catch (IOException e) {
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result = null;
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}
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return result;
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}
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}
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public static void string2file(String content, String filePath) throws IOException {
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string2file(content, new File(filePath));
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}
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public static void string2file(String content, File file) throws IOException {
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if (!file.exists())
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file.createNewFile();
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Files.writeString(file.toPath(), content);
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}
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}
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