Examples of java.io.File.compareTo()

java.io.File.compareTo()
Answers the relative sort ordering of paths for the receiver and given argument. The ordering is platform dependent. @param another a File to compare the receiver to @return an int determined by comparing the two paths. The meaning isdescribed in the Comparable interface. @see Comparable

        File[] files = rootDirectory.listFiles(filter);
        Arrays.sort(files, new Comparator() {
            public int compare(Object o1, Object o2) {
                File f1 = (File) o1;
                File f2 = (File) o2;
                return f2.compareTo(f1);
            }
        });
        for (int i = 0; i < files.length; i++) {
            File file = files[i];
            String name = file.getName();

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       * Block exists in volumeMap and the block file exists on the disk
       */
      // Compare block files
      File memFile = memBlockInfo.getBlockFile();
      if (memFile.exists()) {
        if (memFile.compareTo(diskFile) != 0) {
          DataNode.LOG.warn("Block file " + memFile.getAbsolutePath()
              + " does not match file found by scan "
              + diskFile.getAbsolutePath());
          // TODO: Should the diskFile be deleted?
        }

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      // Compare generation stamp
      if (memBlockInfo.getGenerationStamp() != diskGS) {
        File memMetaFile = DatanodeUtil.getMetaFile(diskFile, 
            memBlockInfo.getGenerationStamp());
        if (memMetaFile.exists()) {
          if (memMetaFile.compareTo(diskMetaFile) != 0) {
            DataNode.LOG.warn("Metadata file in memory "
                + memMetaFile.getAbsolutePath()
                + " does not match file found by scan "
                + diskMetaFile.getAbsolutePath());
          }

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       * Block exists in volumeMap and the block file exists on the disk
       */
      // Compare block files
      File memFile = memBlockInfo.getBlockFile();
      if (memFile.exists()) {
        if (memFile.compareTo(diskFile) != 0) {
          DataNode.LOG.warn("Block file " + memFile.getAbsolutePath()
              + " does not match file found by scan "
              + diskFile.getAbsolutePath());
          // TODO: Should the diskFile be deleted?
        }

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      // Compare generation stamp
      if (memBlockInfo.getGenerationStamp() != diskGS) {
        File memMetaFile = getMetaFile(diskFile, memBlockInfo);
        if (memMetaFile.exists()) {
          if (memMetaFile.compareTo(diskMetaFile) != 0) {
            DataNode.LOG.warn("Metadata file in memory "
                + memMetaFile.getAbsolutePath()
                + " does not match file found by scan "
                + diskMetaFile.getAbsolutePath());
          }

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        File[] files = rootDirectory.listFiles(filter);
        Arrays.sort(files, new Comparator() {
            public int compare(Object o1, Object o2) {
                File f1 = (File) o1;
                File f2 = (File) o2;
                return f2.compareTo(f1);
            }
        });
        for (int i = 0; i < files.length; i++) {
            File file = files[i];
            String name = file.getName();

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       * Block exists in volumeMap and the block file exists on the disk
       */
      // Compare block files
      File memFile = memBlockInfo.getBlockFile();
      if (memFile.exists()) {
        if (memFile.compareTo(diskFile) != 0) {
          LOG.warn("Block file " + memFile.getAbsolutePath()
              + " does not match file found by scan "
              + diskFile.getAbsolutePath());
          // TODO: Should the diskFile be deleted?
        }

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      // Compare generation stamp
      if (memBlockInfo.getGenerationStamp() != diskGS) {
        File memMetaFile = FsDatasetUtil.getMetaFile(diskFile, 
            memBlockInfo.getGenerationStamp());
        if (memMetaFile.exists()) {
          if (memMetaFile.compareTo(diskMetaFile) != 0) {
            LOG.warn("Metadata file in memory "
                + memMetaFile.getAbsolutePath()
                + " does not match file found by scan "
                + (diskMetaFile == null? null: diskMetaFile.getAbsolutePath()));
          }

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        File f1 = new File("thisFile.file");
        File f2 = new File("thisFile.file");
        File f3 = new File("thatFile.file");
        assertEquals("Equal files did not answer zero for compareTo", 0, f1
                .compareTo(f2));
        assertTrue("f3.compareTo(f1) did not result in value < 0", f3
                .compareTo(f1) < 0);
        assertTrue("f1.compareTo(f3) did not result in value > 0", f1
                .compareTo(f3) > 0);
    }

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     */
    public void test_getAbsoluteFile() {
        String base = addTrailingSlash(tempDirectory.getPath());
        File f = new File(base, "temp.tst");
        File f2 = f.getAbsoluteFile();
        assertEquals("Test 1: Incorrect File Returned.", 0, f2.compareTo(f
                .getAbsoluteFile()));
        f = new File(base + "Temp" + File.separator + File.separator + "temp.tst");
        f2 = f.getAbsoluteFile();
        assertEquals("Test 2: Incorrect File Returned.", 0, f2.compareTo(f
                .getAbsoluteFile()));

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