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.HashMap;
21 import java.util.List;
23 import java.util.TreeMap;
25 public class DefaultScope implements Scope {
27 private List<Scope> _parents;
29 private Map<String, Object> _properties;
30 private Map<String, Object> _runtimes;
31 private Map<String, ProvidedInterfaceImplementation> _provided;
32 private ProvidedInterface[] _externallyProvided;
34 public DefaultScope(ProvidedInterface[] aExternallyProvided) {
35 this(aExternallyProvided, new ArrayList<Scope>());
38 public DefaultScope(ProvidedInterface[] aExternallyProvided, Scope aParent) {
39 this(aExternallyProvided, Arrays.asList(new Scope[] { aParent }));
42 public DefaultScope(ProvidedInterface[] aExternallyProvided,
43 List<Scope> aParent) {
44 _parents = new ArrayList<Scope>(aParent);
46 _properties = new HashMap<String, Object>();
47 _runtimes = new HashMap<String, Object>();
48 _provided = new HashMap<String, ProvidedInterfaceImplementation>();
49 _externallyProvided = aExternallyProvided;
53 public ProvidedInterface[] getProvidedInterfaces() {
54 return _externallyProvided;
58 public Object get(String aKey) {
59 return _properties.get(aKey);
63 public void put(String aKey, Object aValue) {
64 _properties.put(aKey, aValue);
68 public void addRuntime(Component aComponent, Object aRuntime) {
69 _runtimes.put(aComponent.getName(), aRuntime);
73 public Object getRuntime(Component aComponent) {
74 return _runtimes.get(aComponent.getName());
78 public Object getRuntime(String aName) {
79 return _runtimes.get(aName);
83 synchronized public void publishInterface(ProvidedInterface aInterface,
84 Object aImplementation) {
85 String id = "" + _count++;
86 _provided.put(id, new ProvidedInterfaceImplementation(aInterface,
88 aInterface.setUniqueId(id);
92 public <T> T getInterfaceImplementation(ProvidedInterface aInterface,
94 if ( aInterface == null ) {
97 String id = aInterface.getUniqueId();
99 // optional interface that was not published.
102 ProvidedInterfaceImplementation provided = _provided.get(id);
103 if (provided == null) {
104 for (Scope parent : _parents) {
105 T impl = parent.getInterfaceImplementation(aInterface, aType);
106 if ( impl != null ) {
112 return provided.getImplementation(aType);