platform-api/src/com/intellij/openapi/roots/ui/LightFilePointer.java

   1 package com.intellij.openapi.roots.ui;
   2
   3 import com.intellij.openapi.vfs.JarFileSystem;
   4 import com.intellij.openapi.vfs.VirtualFile;
   5 import com.intellij.openapi.vfs.VirtualFileManager;
   6 import org.jetbrains.annotations.NotNull;
   7
   8 import java.io.File;
   9
  10 public class LightFilePointer  {
  11   private String myUrl;
  12   private VirtualFile myFile;
  13
  14   public LightFilePointer(String url) {
  15     myUrl = url;
  16   }
  17
  18   public VirtualFile getFile() {
  19     refreshFile();
  20     return myFile;
  21   }
  22
  23   @NotNull
  24   public String getUrl() {
  25     return myUrl;
  26   }
  27
  28   @NotNull
  29   public String getFileName() {
  30     if (myFile != null) {
  31       return myFile.getName();
  32     }
  33     else {
  34       int index = myUrl.lastIndexOf('/');
  35       return index >= 0 ? myUrl.substring(index + 1) : myUrl;
  36     }
  37   }
  38
  39   @NotNull
  40   public String getPresentableUrl() {
  41     VirtualFile file = getFile();
  42     if (file != null) return file.getPresentableUrl();
  43     return toPresentableUrl(myUrl);
  44   }
  45
  46   public static String toPresentableUrl(String url) {
  47     String path = VirtualFileManager.extractPath(url);
  48     if (path.endsWith(JarFileSystem.JAR_SEPARATOR)) {
  49       path = path.substring(0, path.length() - JarFileSystem.JAR_SEPARATOR.length());
  50     }
  51     return path.replace('/', File.separatorChar);
  52   }
  53
  54   public boolean isValid() {
  55     return getFile() != null;
  56   }
  57
  58   private void refreshFile() {
  59     if (myFile != null && myFile.isValid()) return;
  60     VirtualFile virtualFile = VirtualFileManager.getInstance().findFileByUrl(myUrl);
  61     myFile = virtualFile != null && virtualFile.isValid() ? virtualFile : null;
  62   }
  63 }