Implement client.ImageCollection

1 files changed, 91 insertions, 0 deletions

diff --git a/src/ch/epfl/xblast/client/ImageCollection.java b/src/ch/epfl/xblast/client/ImageCollection.java
new file mode 100644
index 0000000..231d84c
--- /dev/null
+++ b/src/ch/epfl/xblast/client/ImageCollection.java
@@ -0,0 +1,91 @@
+package ch.epfl.xblast.client;
+
+import javax.imageio.ImageIO;
+import java.util.HashMap;
+import java.util.Map;
+import java.awt.Image;
+import java.io.File;
+import java.util.NoSuchElementException;
+
+/**
+ * @author Timothée FLOURE (257420)
+ */
+public final class ImageCollection {
+
+    /**
+     * Relative directory.
+     */
+    private final String directory;
+
+    /**
+     * Get the directory Object from the relative directory Name using Java Resource.
+     *
+     * @param directoryName the relative name of the directory
+     * @throws NoSuchElementException
+     * @return the File Object related to the directory
+     */
+    private static File getDirectory(String directoryName) {
+        try { // Ugly! Probably a better way...
+            return new File(ImageCollection.class
+                    .getClassLoader()
+                    .getResource(directoryName)
+                    .toURI());
+        } catch (java.net.URISyntaxException e) {
+            throw new NoSuchElementException();
+        }
+    }
+
+    /**
+     * Maps the directory's files with IDs parsed from their names.
+     *
+     * @return a map of id to files
+     */
+    private Map<Integer, File> mapFilesId() {
+        HashMap<Integer, File> mappedFiles = new HashMap<>();
+
+        for (File file : this.getDirectory(this.directory).listFiles()) {
+            mappedFiles.put(Integer.parseInt(file.getName()), file);
+        }
+
+        return mappedFiles;
+    }
+
+    /**
+     * Instantiates a new ImageCollection.
+     *
+     * @param directory the relative directory name.
+     */
+    public ImageCollection(String directory) {
+        this.directory = directory;
+    }
+
+    /**
+     * Returns the image corresponding to the given id.
+     *
+     * @throws java.util.NoSuchElementException if the requested image does not exists.
+     * @return the image corresponding to the given id
+     */
+    public Image image(int id) {
+        if (this.imageOrNull(id) == null)
+            throw new NoSuchElementException();
+        else
+            return this.imageOrNull(id);
+    }
+
+    /**
+     * Returns the image corresponding to the given id.
+     *
+     * @return the image corresponding to the given id or null
+     */
+    public Image imageOrNull(int id){
+        // Ugly! Probably a better way...
+        if (mapFilesId().containsKey(id))
+            try {
+                return ImageIO.read(mapFilesId().get(id));
+            } catch (java.io.IOException e) {
+                return null;
+            }
+        else
+            return null;
+    }
+}