[LIB-9] Add functional for build image chess diagrams

[chesshog.git] / src / main / java / org / hedgecode / chess / img / piece / PieceSetLoader.java

diff --git a/src/main/java/org/hedgecode/chess/img/piece/PieceSetLoader.java b/src/main/java/org/hedgecode/chess/img/piece/PieceSetLoader.java
new file mode 100644 (file)
index 0000000..f069ba9
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+++ b/src/main/java/org/hedgecode/chess/img/piece/PieceSetLoader.java
@@ -0,0 +1,94 @@
+/*
+ * 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.piece;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.imageio.ImageIO;
+
+import org.hedgecode.chess.img.AbstractImageLoader;
+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 PieceSetLoader extends AbstractImageLoader {
+
+    private static final File PIECES_PATH = new File(IMAGES_PATH, ImageConstants.RESOURCE_PIECES_DIR);
+
+    private static final String[] PIECES_NAMES = PieceSet.getAllPieceNames();
+
+    private Map<String, PieceSet> pieceSetMap = new HashMap<>();
+
+    @Override
+    public PieceSet load(String name) throws ImageException {
+        PieceSet pieceSet = null;
+        if (Type.STATELESS.equals(loadType()) || !pieceSetMap.containsKey(name)) {
+            File piecePath = new File(PIECES_PATH, name);
+            if (piecePath.exists() && piecePath.isDirectory()) {
+                pieceSet = loadPieces(piecePath);
+            }
+            if (Type.STATEFUL.equals(loadType()) && pieceSet != null) {
+                pieceSetMap.put(name, pieceSet);
+            }
+        } else {
+            pieceSet = pieceSetMap.get(name);
+        }
+        return pieceSet;
+    }
+
+    @Override
+    public void unload(String name) {
+        if (Type.STATEFUL.equals(loadType()) && pieceSetMap.containsKey(name)) {
+            pieceSetMap.remove(name);
+        }
+    }
+
+    @Override
+    protected void clear() {
+        pieceSetMap.clear();
+    }
+
+    private PieceSet loadPieces(File piecePath) throws ImageException {
+        PieceSet pieceSet = PieceSet.create();
+        File[] images = piecePath.listFiles(new ImageFilter(PIECES_NAMES));
+        if (images != null) {
+            for (File image : images) {
+                if (image.isFile()) {
+                    String filename = image.getName();
+                    try {
+                        pieceSet.add(
+                                filename.substring(0, filename.lastIndexOf('.')),
+                                ImageIO.read(image)
+                        );
+                    } catch (IOException e) {
+                        throw new ImageException(e.getMessage()); // todo: locale
+                    }
+                }
+            }
+        }
+        return pieceSet.isFull() ? pieceSet : null;
+    }
+
+}