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src/main/java/de/welterde/em/EntityBase.java

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+/*
+ * Copyright (C) 2026 welterde
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package de.welterde.em;
+
+import de.welterde.em.io.EntityRecord;
+
+/**
+ *
+ * @author welterde
+ */
+public abstract class EntityBase implements Entity {
+    protected EntityStorage ctx;
+    protected int id;
+        
+    public EntityBase() {
+        this.id = -1;
+        this.ctx = null;
+    }
+    
+    public EntityBase(EntityStorage ctx, int id) {
+        this.id = id;
+        this.ctx = ctx;
+    }
+    
+    public EntityBase(EntityRecord r) {
+        this.id = r.getID();
+        this.ctx = r.getContext();
+    }
+    
+    public int getEntityId() {
+        if(this.id == -1)
+            throw new IllegalStateException("Entity not initialized");
+        return this.id;
+    }
+    public void initEntity(EntityStorage ctx, int id) {
+        if((this.id != -1) && (this.ctx != null))
+            throw new IllegalStateException("Entity already initialized");
+        if(id == -1)
+            throw new IllegalArgumentException("Invalid ID -1");
+        if(ctx == null)
+            throw new NullPointerException("Context is null");
+        this.id = id;
+        this.ctx = ctx;
+    }
+    
+    public boolean isEntityInitialized() {
+        return this.id != -1;
+    }
+    
+}