From 7c279747beb43c7e88633a6228a155a30e6834f7 Mon Sep 17 00:00:00 2001
From: Benjamin Culkin <scorpress@gmail.com>
Date: Mon, 27 May 2024 11:38:33 -0400
Subject: Initial import

---
 .../foundation/container/AbstractContainer.java    | 98 ++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 israfil-foundation-container/src/main/java/net/israfil/foundation/container/AbstractContainer.java

(limited to 'israfil-foundation-container/src/main/java/net/israfil/foundation/container/AbstractContainer.java')

diff --git a/israfil-foundation-container/src/main/java/net/israfil/foundation/container/AbstractContainer.java b/israfil-foundation-container/src/main/java/net/israfil/foundation/container/AbstractContainer.java
new file mode 100644
index 0000000..fe6a978
--- /dev/null
+++ b/israfil-foundation-container/src/main/java/net/israfil/foundation/container/AbstractContainer.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2008 Israfil Consulting Services Corporation
+ * Copyright (c) 2008 Christian Edward Gruber
+ * All Rights Reserved
+ * 
+ * This software is licensed under the Berkeley Standard Distribution license,
+ * (BSD license), as defined below:
+ * 
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this 
+ *    list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice, 
+ *    this list of conditions and the following disclaimer in the documentation 
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of Israfil Consulting Services nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software without 
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ * 
+ * $Id: Copyright.java 618 2008-04-14 14:03:03Z christianedwardgruber $
+ */
+package net.israfil.foundation.container;
+
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+
+import net.israfil.foundation.container.error.ComponentAlreadyRegisteredError;
+
+/**
+ * A convenience abstract class that implements basic component storage and
+ * lookup, as well as basic component instance assignment.
+ * 
+ * @author <a href="mailto:cgruber@israfil.net">Christian Edward Gruber </a>
+ *
+ */
+public abstract class AbstractContainer implements Container {
+	
+	private final Map components = new HashMap();
+	
+	private final Container parent;
+	
+	private boolean running = false;
+
+	public AbstractContainer() {
+		parent = null;
+	}
+	
+	public AbstractContainer(Container parent) {
+		this.parent = parent;
+	}
+	
+	protected boolean isStored(Object key) {
+		return components.containsKey(key);
+	}
+
+	public boolean hasComponent(Object key) {
+		return components.containsKey(key) || (parent != null && parent.hasComponent(key));
+	}
+	
+	public boolean isRunning() {
+		return this.running;
+	}
+	
+	public void start() {
+		this.running = true;
+	}
+	
+	protected Container getParent() { return parent; }
+
+	protected Object getStoredComponent(Object key) {
+		Object result = components.get(key);
+		if (result == null && parent != null) 
+			result = parent.getComponent(key);
+		return result;
+	}
+	
+	protected void store(Object key, Object component) {
+		if (hasComponent(key)) {
+			if (getComponent(key) == component) return;
+			throw new ComponentAlreadyRegisteredError("Object already registered for key: " + key);
+		}
+		components.put(key, component);
+	}
+	
+}
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