Put Eclipse and JCR components in subdirs in order to clarify indirect

[lgpl/argeo-commons.git] / eclipse / org.argeo.cms.swt / src / org / argeo / eclipse / ui / fs / FsUiUtils.java

diff --git a/eclipse/org.argeo.cms.swt/src/org/argeo/eclipse/ui/fs/FsUiUtils.java b/eclipse/org.argeo.cms.swt/src/org/argeo/eclipse/ui/fs/FsUiUtils.java
new file mode 100644 (file)
index 0000000..956d96b
--- /dev/null
+++ b/eclipse/org.argeo.cms.swt/src/org/argeo/eclipse/ui/fs/FsUiUtils.java
@@ -0,0 +1,132 @@
+package org.argeo.eclipse.ui.fs;
+
+import java.io.IOException;
+import java.nio.file.DirectoryIteratorException;
+import java.nio.file.DirectoryStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+/** Centralise additional utilitary methods to manage Java7 NIO files */
+public class FsUiUtils {
+
+       /**
+        * thanks to
+        * http://programming.guide/java/formatting-byte-size-to-human-readable-format.html
+        */
+       public static String humanReadableByteCount(long bytes, boolean si) {
+               int unit = si ? 1000 : 1024;
+               if (bytes < unit)
+                       return bytes + " B";
+               int exp = (int) (Math.log(bytes) / Math.log(unit));
+               String pre = (si ? "kMGTPE" : "KMGTPE").charAt(exp - 1) + (si ? "" : "i");
+               return String.format("%.1f %sB", bytes / Math.pow(unit, exp), pre);
+       }
+
+       public static Path[] getChildren(Path parent, String filter, boolean showHiddenItems, boolean folderFirst,
+                       String orderProperty, boolean reverseOrder) {
+               if (!Files.isDirectory(parent))
+                       return null;
+               List<Pair> pairs = new ArrayList<>();
+               try (DirectoryStream<Path> stream = Files.newDirectoryStream(parent, filter)) {
+                       loop: for (Path entry : stream) {
+                               if (!showHiddenItems)
+                                       if (Files.isHidden(entry))
+                                               continue loop;
+                               switch (orderProperty) {
+                               case FsUiConstants.PROPERTY_SIZE:
+                                       if (folderFirst)
+                                               pairs.add(new LPair(entry, Files.size(entry), Files.isDirectory(entry)));
+                                       else
+                                               pairs.add(new LPair(entry, Files.size(entry)));
+                                       break;
+                               case FsUiConstants.PROPERTY_LAST_MODIFIED:
+                                       if (folderFirst)
+                                               pairs.add(new LPair(entry, Files.getLastModifiedTime(entry).toMillis(),
+                                                               Files.isDirectory(entry)));
+                                       else
+                                               pairs.add(new LPair(entry, Files.getLastModifiedTime(entry).toMillis()));
+                                       break;
+                               case FsUiConstants.PROPERTY_NAME:
+                                       if (folderFirst)
+                                               pairs.add(new SPair(entry, entry.getFileName().toString(), Files.isDirectory(entry)));
+                                       else
+                                               pairs.add(new SPair(entry, entry.getFileName().toString()));
+                                       break;
+                               default:
+                                       throw new FsUiException("Unable to prepare sort for property " + orderProperty);
+                               }
+                       }
+                       Pair[] rows = pairs.toArray(new Pair[0]);
+                       Arrays.sort(rows);
+                       Path[] results = new Path[rows.length];
+                       if (reverseOrder) {
+                               int j = rows.length - 1;
+                               for (int i = 0; i < rows.length; i++)
+                                       results[i] = rows[j - i].p;
+                       } else
+                               for (int i = 0; i < rows.length; i++)
+                                       results[i] = rows[i].p;
+                       return results;
+               } catch (IOException | DirectoryIteratorException e) {
+                       throw new FsUiException("Unable to filter " + parent + " children with filter " + filter, e);
+               }
+       }
+
+       static abstract class Pair implements Comparable<Object> {
+               Path p;
+               Boolean i;
+       };
+
+       static class LPair extends Pair {
+               long v;
+
+               public LPair(Path path, long propValue) {
+                       p = path;
+                       v = propValue;
+               }
+
+               public LPair(Path path, long propValue, boolean isDir) {
+                       p = path;
+                       v = propValue;
+                       i = isDir;
+               }
+
+               public int compareTo(Object o) {
+                       if (i != null) {
+                               Boolean j = ((LPair) o).i;
+                               if (i.booleanValue() != j.booleanValue())
+                                       return i.booleanValue() ? -1 : 1;
+                       }
+                       long u = ((LPair) o).v;
+                       return v < u ? -1 : v == u ? 0 : 1;
+               }
+       };
+
+       static class SPair extends Pair {
+               String v;
+
+               public SPair(Path path, String propValue) {
+                       p = path;
+                       v = propValue;
+               }
+
+               public SPair(Path path, String propValue, boolean isDir) {
+                       p = path;
+                       v = propValue;
+                       i = isDir;
+               }
+
+               public int compareTo(Object o) {
+                       if (i != null) {
+                               Boolean j = ((SPair) o).i;
+                               if (i.booleanValue() != j.booleanValue())
+                                       return i.booleanValue() ? -1 : 1;
+                       }
+                       String u = ((SPair) o).v;
+                       return v.compareTo(u);
+               }
+       };
+}