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Undo.java
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Undo.java
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import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
public class Undo implements Commentable{
private static BufferedReader dataBuffer;
public boolean hasUndo(File f) throws IOException
{
String line="";
FileReader fr = new FileReader(f);
dataBuffer = fr.getBuffer();
while((line=dataBuffer.readLine())!=null)
{
if(line.contains(UNDO_PART))
if(hasContent()){
return true;
}
}
return false;
}
private boolean hasContent() throws IOException
{
String line="";
while((line=dataBuffer.readLine())!=null)
{
String trimmedLine = line.trim();
if((trimmedLine.length() > 0 && !trimmedLine.contains(COMMENT_START) && !trimmedLine.contains(COMMENT_END) && !trimmedLine.contains(SINGLE_COMMENT) && !trimmedLine.contains(UNDO_PART)))
{
return true;
}
if(line.contains(COMMENT_START))
if(checkContent(line)){
return true;
}
}
return false;
}
private boolean checkContent(String line) throws IOException
{
if(line.trim().indexOf(COMMENT_START)!=0) return true;
else
do
{
if(line.contains(COMMENT_END))
{
if(line.trim().indexOf(COMMENT_END)!= (line.trim().length()-2))
return true;
return false;
}
}while((line=dataBuffer.readLine())!=null);
return false;
}
}