OnJava8-Examples/patterns/trash/ParseTrash.java
2015-11-15 15:51:35 -08:00

51 lines
1.6 KiB
Java

// patterns/trash/ParseTrash.java
// ©2016 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
// Open a file and parse its contents into
// Trash objects, placing each into a List.
package patterns.trash;
import java.util.*;
import java.util.stream.*;
import java.io.*;
import java.nio.file.*;
import java.nio.file.Files;
public class ParseTrash {
public static <T extends Trash> void
fillBin(String pckg, Fillable<T> bin) {
try {
Files.lines(Paths.get("..", "trash", "Trash.dat"))
// Remove empty lines and comment lines:
.filter(line -> line.trim().length() != 0)
.filter(line -> !line.startsWith("//"))
.forEach( line -> {
String type = "patterns." + pckg + "." +
line.substring(
0, line.indexOf(':')).trim();
double weight = Double.valueOf(
line.substring(line.indexOf(':') + 1)
.trim());
bin.addTrash(Trash.factory(
new Trash.Info(type, weight)));
});
} catch(IOException |
NumberFormatException |
Trash.TrashClassNotFoundException |
Trash.CannotCreateTrashException e) {
throw new RuntimeException(e);
}
}
// Special case to handle List:
public static <T extends Trash> void
fillBin(String pckg, List<T> bin) {
fillBin(pckg, new FillableList<>(bin));
}
// Basic test:
public static void main(String[] args) {
List<Trash> t = new ArrayList<>();
fillBin("trash", t);
t.forEach(System.out::println);
}
}