X-Git-Url: http://wamblee.org/gitweb/?a=blobdiff_plain;f=system%2Fgeneral%2Fsrc%2Fmain%2Fjava%2Forg%2Fwamblee%2Fsystem%2Fcore%2FDefaultScope.java;fp=system%2Fgeneral%2Fsrc%2Fmain%2Fjava%2Forg%2Fwamblee%2Fsystem%2Fcore%2FDefaultScope.java;h=8b0c88efe0e4b746a6d92dd5e9a49d1fe1446ddc;hb=a003b7d0db5305071271df0439f31adf9d1f426a;hp=0000000000000000000000000000000000000000;hpb=dea786c9d49228a37cb5fd5b4113b86d9f6cddbf;p=utils

diff --git a/system/general/src/main/java/org/wamblee/system/core/DefaultScope.java b/system/general/src/main/java/org/wamblee/system/core/DefaultScope.java
new file mode 100644
index 00000000..8b0c88ef
--- /dev/null
+++ b/system/general/src/main/java/org/wamblee/system/core/DefaultScope.java
@@ -0,0 +1,109 @@
+/*
+ * Copyright 2008 the original author or authors.
+ * 
+ * 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.wamblee.system.core;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
+
+public class DefaultScope implements Scope {
+
+	private List<Scope> _parents;
+	private int _count;
+	private Map<String, Object> _properties;
+	private Map<String, Object> _runtimes;
+	private Map<String, ProvidedInterfaceImplementation> _provided;
+	private ProvidedInterface[] _externallyProvided;
+
+	public DefaultScope(ProvidedInterface[] aExternallyProvided) {
+		this(aExternallyProvided, new ArrayList<Scope>());
+	}
+
+	public DefaultScope(ProvidedInterface[] aExternallyProvided, Scope aParent) {
+		this(aExternallyProvided, Arrays.asList(new Scope[] { aParent }));
+	}
+
+	public DefaultScope(ProvidedInterface[] aExternallyProvided,
+			List<Scope> aParent) {
+		_parents = new ArrayList<Scope>(aParent);
+		_count = 0;
+		_properties = new TreeMap<String, Object>();
+		_runtimes = new TreeMap<String, Object>();
+		_provided = new TreeMap<String, ProvidedInterfaceImplementation>();
+		_externallyProvided = aExternallyProvided;
+	}
+
+	@Override
+	public ProvidedInterface[] getProvidedInterfaces() {
+		return _externallyProvided;
+	}
+
+	@Override
+	public Object get(String aKey) {
+		return _properties.get(aKey);
+	}
+
+	@Override
+	public void put(String aKey, Object aValue) {
+		_properties.put(aKey, aValue);
+	}
+
+	@Override
+	public void addRuntime(Component aComponent, Object aRuntime) {
+		_runtimes.put(aComponent.getQualifiedName(), aRuntime);
+	}
+
+	@Override
+	public Object getRuntime(Component aComponent) {
+		return _runtimes.get(aComponent.getQualifiedName());
+	}
+
+	@Override
+	synchronized public void publishInterface(ProvidedInterface aInterface,
+			Object aImplementation) {
+		String id = "" + _count++;
+		_provided.put(id, new ProvidedInterfaceImplementation(aInterface,
+				aImplementation));
+		aInterface.setUniqueId(id);
+	}
+
+	@Override
+	public <T> T retrieveInterfaceImplementation(ProvidedInterface aInterface,
+			Class<T> aType) {
+		if ( aInterface == null ) { 
+			return null; 
+		}
+		String id = aInterface.getUniqueId(); 
+		if ( id == null ) { 
+			// optional interface that was not published.
+			return null;
+		}
+		ProvidedInterfaceImplementation provided = _provided.get(id);
+		if (provided == null) {
+			for (Scope parent : _parents) {
+				T impl = parent.retrieveInterfaceImplementation(aInterface, aType);
+				if ( impl != null ) { 
+					return impl; 
+				}
+			}
+			return null; 
+		} else {
+			return provided.getImplementation(aType);
+		}
+	}
+}