2 * Copyright 2008 the original author or authors.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
16 package org.wamblee.system.core;
18 import java.util.ArrayList;
19 import java.util.Arrays;
20 import java.util.List;
22 import java.util.TreeMap;
24 public class DefaultScope implements Scope {
26 private List<Scope> _parents;
28 private Map<String, Object> _properties;
29 private Map<String, Object> _runtimes;
30 private Map<String, ProvidedInterfaceImplementation> _provided;
31 private ProvidedInterface[] _externallyProvided;
33 public DefaultScope(ProvidedInterface[] aExternallyProvided) {
34 this(aExternallyProvided, new ArrayList<Scope>());
37 public DefaultScope(ProvidedInterface[] aExternallyProvided, Scope aParent) {
38 this(aExternallyProvided, Arrays.asList(new Scope[] { aParent }));
41 public DefaultScope(ProvidedInterface[] aExternallyProvided,
42 List<Scope> aParent) {
43 _parents = new ArrayList<Scope>(aParent);
45 _properties = new TreeMap<String, Object>();
46 _runtimes = new TreeMap<String, Object>();
47 _provided = new TreeMap<String, ProvidedInterfaceImplementation>();
48 _externallyProvided = aExternallyProvided;
52 public ProvidedInterface[] getProvidedInterfaces() {
53 return _externallyProvided;
57 public Object get(String aKey) {
58 return _properties.get(aKey);
62 public void put(String aKey, Object aValue) {
63 _properties.put(aKey, aValue);
67 public void addRuntime(Component aComponent, Object aRuntime) {
68 _runtimes.put(aComponent.getQualifiedName(), aRuntime);
72 public Object getRuntime(Component aComponent) {
73 return _runtimes.get(aComponent.getQualifiedName());
77 synchronized public void publishInterface(ProvidedInterface aInterface,
78 Object aImplementation) {
79 String id = "" + _count++;
80 _provided.put(id, new ProvidedInterfaceImplementation(aInterface,
82 aInterface.setUniqueId(id);
86 public <T> T getInterfaceImplementation(ProvidedInterface aInterface,
88 if ( aInterface == null ) {
91 String id = aInterface.getUniqueId();
93 // optional interface that was not published.
96 ProvidedInterfaceImplementation provided = _provided.get(id);
97 if (provided == null) {
98 for (Scope parent : _parents) {
99 T impl = parent.getInterfaceImplementation(aInterface, aType);
100 if ( impl != null ) {
106 return provided.getImplementation(aType);