src/com/ranfa/lib/handler/CrashReportList.java

   1 package com.ranfa.lib.handler;
   2
   3 import java.io.FileWriter;
   4 import java.io.IOException;
   5 import java.nio.file.Paths;
   6 import java.text.SimpleDateFormat;
   7 import java.util.ArrayList;
   8 import java.util.Date;
   9 import java.util.Iterator;
  10
  11 import org.slf4j.LoggerFactory;
  12
  13 public class CrashReportList <E> extends ArrayList<E> {
  14
  15         private static final String EMPTY_LINE_PLACEHOLDER = "{empty}";
  16
  17         private final SimpleDateFormat FORMAT = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss.txt");
  18
  19         public CrashReportList() {
  20                 super();
  21         }
  22
  23         public String generateCrashReport() {
  24                 StringBuilder builder = new StringBuilder();
  25                 Iterator<E> itr = super.iterator();
  26                 if(!itr.hasNext())
  27                         throw new IllegalStateException("There is no lines to generate crash report.");
  28                 while(itr.hasNext()) {
  29                         String next = itr.next().toString();
  30                         if(next.equals(EMPTY_LINE_PLACEHOLDER))
  31                                 next.replaceAll(EMPTY_LINE_PLACEHOLDER, "\n");
  32                         builder.append(next).append("\n");
  33                 }
  34                 builder.deleteCharAt(builder.length()).deleteCharAt(builder.length());
  35                 try {
  36                         FileWriter writer = new FileWriter(Paths.get(FORMAT.format(new Date())).toFile());
  37                         writer.close();
  38                 } catch (IOException e) {
  39                         LoggerFactory.getLogger(CrashReportList.class).error("Cannot write crash report.", e);
  40                 }
  41                 return builder.toString();
  42         }
  43
  44         @SuppressWarnings("unchecked")
  45         public void emptyLine() {
  46                 super.add((E) EMPTY_LINE_PLACEHOLDER);
  47         }
  48 }