Merge pull request #50 from Myyyvothrr/main

async reader: filter files in target location

src/main/java/org/texttechnologylab/DockerUnifiedUIMAInterface/io/AsyncCollectionReader.java

@@ -18,9 +18,7 @@
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.Random;
+import java.util.*;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentLinkedQueue;
 import java.util.concurrent.atomic.AtomicInteger;
@@ -64,6 +62,11 @@ public class AsyncCollectionReader {
 
     private int debugCount = 25;
 
+    /**
+     * If a target location is specified, documents in the source directory that already exist in the target are skipped automatically
+     */
+    private String targetLocation = null;
+
     public AsyncCollectionReader(String folder, String ending) {
         this(folder, ending, 25, -1, false, "", false, null);
     }
@@ -117,11 +120,15 @@ public AsyncCollectionReader(String folder, String ending, int debugCount, int s
     }
 
     public AsyncCollectionReader(String folder, String ending, int debugCount, int sampleSize, DUUI_ASYNC_COLLECTION_READER_SAMPLE_MODE sampleMode, String savePath, boolean bAddMetadata, String language, int skipSmallerFiles) {
-        this(folder, ending, debugCount, getRandomFromMode(sampleMode, sampleSize), getSortFromMode(sampleMode), savePath, bAddMetadata, language, skipSmallerFiles);
+        this(folder, ending, debugCount, getRandomFromMode(sampleMode, sampleSize), getSortFromMode(sampleMode), savePath, bAddMetadata, language, skipSmallerFiles, null, "");
     }
 
     public AsyncCollectionReader(String folder, String ending, int debugCount, int iRandom, boolean bSort, String savePath, boolean bAddMetadata, String language) {
-            this(folder, ending, debugCount, iRandom, bSort, savePath, bAddMetadata, language, 0);
+        this(folder, ending, debugCount, iRandom, bSort, savePath, bAddMetadata, language, 0, null, "");
+    }
+
+    public AsyncCollectionReader(String folder, String ending, int debugCount, int iRandom, boolean bSort, String savePath, boolean bAddMetadata, String language, String targetLocation, String targetEnding) {
+            this(folder, ending, debugCount, iRandom, bSort, savePath, bAddMetadata, language, 0, targetLocation, targetEnding);
     }
 
     /***
@@ -135,9 +142,10 @@ public AsyncCollectionReader(String folder, String ending, int debugCount, int i
      * @param bAddMetadata Add metadata to the documents
      * @param language Add language to the documents
      * @param skipSmallerFiles Skip files smaller than this value in bytes
+     * @param targetLocation If a target location is specified, documents in the source directory that already exist in the target are skipped automatically
      */
-    public AsyncCollectionReader(String folder, String ending, int debugCount, int iRandom, boolean bSort, String savePath, boolean bAddMetadata, String language, int skipSmallerFiles) {
-
+    public AsyncCollectionReader(String folder, String ending, int debugCount, int iRandom, boolean bSort, String savePath, boolean bAddMetadata, String language, int skipSmallerFiles, String targetLocation, String targetEnding) {
+        this.targetLocation = targetLocation;
         _addMetadata = bAddMetadata;
         _language = language;
         _filePaths = new ConcurrentLinkedQueue<>();
@@ -205,6 +213,12 @@ else if(iRandom>0){
             }
         }
 
+        // remove files that are already in the target location
+        // NOTE we do this after saving the file list, as we do not want to change anything but only avoid processing files multiple times
+        if (this.targetLocation != null) {
+            _filePaths = removeIfInTarget(_filePaths, this.targetLocation, targetEnding, this._path, ending);
+        }
+
         _filePathsBackup.addAll(_filePaths);
 
         this.debugCount = debugCount;
@@ -452,6 +466,59 @@ else if (n < 0){
         return rQueue;
     }
 
+    /***
+     * Removes files that are present in the target location
+     * @param paths List of paths
+     * @param targetLocation Target location where to check for files
+     * @return A new queue without files that are present in the target location
+     */
+    public static ConcurrentLinkedQueue<String> removeIfInTarget(ConcurrentLinkedQueue<String> paths, String targetLocation, String targetEnding, String sourceLocation, String sourceEnding){
+        System.out.println("Chacking target location for files: " + targetLocation);
+        ConcurrentLinkedQueue<String> targetFilePaths = new ConcurrentLinkedQueue<>();
+        File targetDir = new File(targetLocation);
+        if (!targetDir.exists()) {
+            // This might not be an error, e.g. if it is the first run
+            System.err.println("The targetLocation " + targetFilePaths + " does not exist! Continuing without removing files from target location.");
+        }
+        else if (targetDir.exists() && !targetDir.isDirectory()) {
+            throw new RuntimeException("The targetLocation " + targetFilePaths + " is not a directory!");
+        }
+        else {
+            addFilesToConcurrentList(targetDir, targetEnding, targetFilePaths);
+        }
+        System.out.println("Found " + targetFilePaths.size() + " files in target location");
+
+        List<String> cleanList = new ArrayList<>();
+        if (!targetFilePaths.isEmpty()) {
+            System.out.println("Checking against " + targetFilePaths.size() + " files in target location");
+            Set<String> existingFiles = targetFilePaths.stream()
+                    .map(Paths::get)
+                    .filter(Files::isRegularFile)
+                    .map(f -> targetDir.toPath().relativize(f).toString())
+                    .map(f -> f.replaceAll(targetEnding, ""))
+                    .map(f -> f.replaceAll(sourceEnding, ""))
+                    .collect(Collectors.toSet());
+
+            Path sourceDir = Paths.get(sourceLocation);
+            for (String f : paths) {
+                Path p = Paths.get(f);
+                String fn = sourceDir.relativize(p).toString();
+                fn = fn.replaceAll(sourceEnding, "");
+                boolean found = existingFiles.contains(fn);
+                if (!found) {
+                    cleanList.add(f);
+                }
+            }
+        }
+        else {
+            System.out.println("No files in target location found, keeping all files from source location");
+            cleanList.addAll(paths);
+        }
+        System.out.println("Removed " + (paths.size() - cleanList.size()) + " files from source location that are already present in target location, keeping " + cleanList.size() + " files");
+
+        return new ConcurrentLinkedQueue<>(cleanList);
+    }
+
     public static String getSize(String sPath){
         return FileUtils.byteCountToDisplaySize(new File(sPath).length());
     }