[LIB-9] Separate chesshog-graphics module

[chesshog.git] / chesshog-graphics / src / main / java / org / hedgecode / chess / img / board / BoardLoader.java

diff --git a/chesshog-graphics/src/main/java/org/hedgecode/chess/img/board/BoardLoader.java b/chesshog-graphics/src/main/java/org/hedgecode/chess/img/board/BoardLoader.java
new file mode 100644 (file)
index 0000000..c61bd98
--- /dev/null
+++ b/chesshog-graphics/src/main/java/org/hedgecode/chess/img/board/BoardLoader.java
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2018-2019. Developed by Hedgecode.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.hedgecode.chess.img.board;
+
+import java.awt.image.BufferedImage;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.hedgecode.chess.img.AbstractImageLoader;
+import org.hedgecode.chess.img.FilenameUtils;
+import org.hedgecode.chess.img.ImageConstants;
+import org.hedgecode.chess.img.ImageException;
+import org.hedgecode.chess.img.ImageFilter;
+
+/**
+ *
+ *
+ * @author Dmitry Samoshin aka gotty
+ */
+public class BoardLoader extends AbstractImageLoader {
+
+    private static final String SQUARES_DIR = ImageConstants.RESOURCE_SQUARES_DIR;
+
+    private static final String SQUARE_DARK = ImageConstants.DARK_SQUARE_FILENAME;
+    private static final String SQUARE_LIGHT = ImageConstants.LIGHT_SQUARE_FILENAME;
+
+    private static final String[] SQUARE_NAMES = {SQUARE_DARK, SQUARE_LIGHT};
+
+    private Map<String, Board> squareSetMap = new HashMap<>();
+
+    @Override
+    public Board load(String name) throws ImageException {
+        Board board = null;
+        if (Type.STATELESS.equals(loadType()) || !squareSetMap.containsKey(name)) {
+            String boardPath = FilenameUtils.getFullPath(SQUARES_DIR, name);
+            SquarePair<BufferedImage> squarePair = loadSquares(boardPath);
+            if (squarePair != null) {
+                board = Board.create(squarePair);
+                if (Type.STATEFUL.equals(loadType())) {
+                    squareSetMap.put(name, board);
+                }
+            }
+        } else {
+            board = squareSetMap.get(name);
+        }
+        return board;
+    }
+
+    @Override
+    public void unload(String name) {
+        if (Type.STATEFUL.equals(loadType()) && squareSetMap.containsKey(name)) {
+            squareSetMap.remove(name);
+        }
+    }
+
+    @Override
+    protected void clear() {
+        squareSetMap.clear();
+    }
+
+    private SquarePair<BufferedImage> loadSquares(String boardPath) throws ImageException {
+        Map<String, BufferedImage> images =
+                loadImages(
+                        boardPath,
+                        new ImageFilter(SQUARE_NAMES)
+                );
+        BufferedImage dark = images.get(SQUARE_DARK);
+        BufferedImage light = images.get(SQUARE_LIGHT);
+        return (dark != null && light != null)
+                ? SquarePair.create(dark, light)
+                : null; // todo: ImageException
+    }
+
+}