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package com.github.snowdream.android.util;
import android.content.Context;
import android.text.TextUtils;
import org.apache.commons.lang3.time.FastDateFormat;
import java.io.File;
import java.io.IOException;
import java.util.Date;
/**
* Decide the absolute path of the file which log will be written to.
*
* Created by hui.yang on 2014/11/13.
*/
public abstract class FilePathGenerator {
private String path = null;
protected String dir = "/mnt/sdcard/snowdream/android/log";
protected File file = null;
/**
* if not set, "app" will be used.
*/
protected String filename = "app";
/**
* if not set, ".log" will be used.
*/
protected String suffix = ".log";
//Supress default constructor for noninstantiability
private FilePathGenerator() {
throw new AssertionError();
}
/**
* dir will be context.getExternalFilesDir("null").getAbsolutePath() + File.pathSeparator + "snowdream" + File.pathSeparator + "log"
* filename will be decided by the param filename and suffix together.
*
* @param context
* @param filename
* @param suffix
*/
public FilePathGenerator(Context context, String filename, String suffix) {
if (context == null) {
throw new NullPointerException("The Context should not be null.");
}
dir = context.getExternalFilesDir("null").getAbsolutePath() + File.pathSeparator + "snowdream" + File.pathSeparator + "log";
if (!TextUtils.isEmpty(filename)) {
this.filename = filename;
}
if (!TextUtils.isEmpty(suffix)) {
this.suffix = suffix;
}
}
/**
* dir is from the param dir.
* filename will be decided by the param filename and suffix together.
*
* @param dir
* @param filename
* @param suffix
*/
public FilePathGenerator(String dir, String filename, String suffix) {
if (dir != null) {
this.dir = dir;
}
if (!TextUtils.isEmpty(filename)) {
this.filename = filename;
}
if (!TextUtils.isEmpty(suffix)) {
this.suffix = suffix;
}
}
/**
* Generate the file path of the log.
*
* The file path should be absolute.
*
* @return the file path of the log
*/
public abstract String generateFilePath();
/**
* Whetether to generate the file path of the log.
*
* @return if true,generate the file path of the log, otherwise not.
*/
public abstract Boolean isGenerate();
/**
* It is time to generate the new file path of the log.
* You can get the new and the old file path of the log.
*
* The file path should be absolute.
*
* @param newPath the new file path
* @param oldPath the old file path
*/
public abstract void onGenerate(String newPath, String oldPath);
/**
* Get the file path of the log. generate a new file path if needed.
*
* @return the file path of the log.
*/
public final String getPath() {
if (isGenerate()) {
String newPath = generateFilePath();
onGenerate(newPath, path);
path = newPath;
}
return path;
}
/**
* Default FilePathGenerator
*/
public static class DefaultFilePathGenerator extends FilePathGenerator {
/**
* dir will be context.getExternalFilesDir("null").getAbsolutePath() + File.pathSeparator + "snowdream" + File.pathSeparator + "log"
* filename will be decided by the param filename and suffix together.
*
* @param context
* @param filename
* @param suffix
*/
public DefaultFilePathGenerator(Context context, String filename, String suffix) {
super(context, filename, suffix);
}
/**
* dir is from the param dir.
* filename will be decided by the param filename and suffix together.
*
* @param dir
* @param filename
* @param suffix
*/
public DefaultFilePathGenerator(String dir, String filename, String suffix) {
super(dir, filename, suffix);
}
@Override
public String generateFilePath() {
String path = null;
if (TextUtils.isEmpty(dir)) {
return path;
}
File logDir = new File(dir);
if (!logDir.exists()) {
logDir.mkdirs();
}
file = new File(logDir, filename+suffix);
if (!file.exists()) {
try {
file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
return file.getAbsolutePath();
}
@Override
public Boolean isGenerate() {
return (file == null) || !file.exists();
}
@Override
public void onGenerate(String newPath, String oldPath) {
}
}
/**
* Date FilePathGenerator
*/
public static class DateFilePathGenerator extends FilePathGenerator {
/**
* dir will be context.getExternalFilesDir("null").getAbsolutePath() + File.pathSeparator + "snowdream" + File.pathSeparator + "log"
* filename will be decided by the param filename and suffix together.
*
* @param context
* @param filename
* @param suffix
*/
public DateFilePathGenerator(Context context, String filename, String suffix) {
super(context, filename, suffix);
}
/**
* dir is from the param dir.
* filename will be decided by the param filename and suffix together.
*
* @param dir
* @param filename
* @param suffix
*/
public DateFilePathGenerator(String dir, String filename, String suffix) {
super(dir, filename, suffix);
}
@Override
public String generateFilePath() {
String path = null;
if (TextUtils.isEmpty(dir)) {
return path;
}
File logDir = new File(dir);
if (!logDir.exists()) {
logDir.mkdirs();
}
Date myDate = new Date();
FastDateFormat fdf = FastDateFormat.getInstance("yyyy-MM-dd");
String myDateString = fdf.format(myDate);
StringBuffer buffer = new StringBuffer();
buffer.append(filename);
buffer.append("-");
buffer.append(myDateString);
buffer.append(suffix);
file = new File(logDir, buffer.toString());
if (!file.exists()) {
try {
file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
return file.getAbsolutePath();
}
@Override
public Boolean isGenerate() {
return (file == null) || !file.exists();
}
@Override
public void onGenerate(String newPath, String oldPath) {
}
}
/**
* LimitSize FilePathGenerator
*/
public static class LimitSizeFilePathGenerator extends FilePathGenerator {
private int maxSize = 0;
/**
* dir is from the param dir.
* filename will be decided by the param filename and suffix together.
*
* @param context
* @param filename
* @param suffix
* @param maxSize
*/
public LimitSizeFilePathGenerator(Context context, String filename, String suffix, int maxSize) {
super(context, filename, suffix);
this.maxSize = maxSize;
}
/**
* dir will be context.getExternalFilesDir("null").getAbsolutePath() + File.pathSeparator + "snowdream" + File.pathSeparator + "log"
* filename will be decided by the param filename and suffix together.
*
* @param dir
* @param filename
* @param suffix
* @param maxSize
*/
public LimitSizeFilePathGenerator(String dir, String filename, String suffix, int maxSize) {
super(dir, filename, suffix);
this.maxSize = maxSize;
}
@Override
public String generateFilePath() {
String path = null;
if (TextUtils.isEmpty(dir)) {
return path;
}
File logDir = new File(dir);
if (!logDir.exists()) {
logDir.mkdirs();
}
Date myDate = new Date();
FastDateFormat fdf = FastDateFormat.getInstance("yyyy-MM-dd-HH-mm-ss");
String myDateString = fdf.format(myDate);
StringBuffer buffer = new StringBuffer();
buffer.append(filename);
buffer.append("-");
buffer.append(myDateString);
buffer.append(suffix);
file = new File(logDir, buffer.toString());
if (!file.exists()) {
try {
file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
return file.getAbsolutePath();
}
@Override
public Boolean isGenerate() {
return (file == null) || !file.exists() || file.length() >= maxSize;
}
@Override
public void onGenerate(String newPath, String oldPath) {
}
}
}
