001 /*
002 GRANITE DATA SERVICES
003 Copyright (C) 2012 GRANITE DATA SERVICES S.A.S.
004
005 This file is part of Granite Data Services.
006
007 Granite Data Services is free software; you can redistribute it and/or modify
008 it under the terms of the GNU Library General Public License as published by
009 the Free Software Foundation; either version 2 of the License, or (at your
010 option) any later version.
011
012 Granite Data Services is distributed in the hope that it will be useful, but
013 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014 FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015 for more details.
016
017 You should have received a copy of the GNU Library General Public License
018 along with this library; if not, see <http://www.gnu.org/licenses/>.
019 */
020
021 package org.granite.client.tide.impl;
022
023 import java.lang.annotation.Annotation;
024 import java.lang.reflect.Array;
025 import java.util.ArrayList;
026 import java.util.HashMap;
027 import java.util.List;
028 import java.util.Map;
029 import java.util.Map.Entry;
030
031 import org.granite.client.tide.Context;
032 import org.granite.client.tide.InstanceStore;
033 import org.granite.client.tide.server.Component;
034
035 /**
036 * @author William DRAI
037 */
038 public class SimpleInstanceStore implements InstanceStore {
039
040 private final Context context;
041 private static final String TYPED = "__TYPED__";
042 private Map<String, Object> instances = new HashMap<String, Object>();
043
044 public SimpleInstanceStore(Context context) {
045 this.context = context;
046 }
047
048 @SuppressWarnings("unchecked")
049 public <T> T getNoProxy(String name) {
050 Object instance = instances.get(name);
051 if (instance instanceof Component)
052 return null;
053 return (T)instance;
054 }
055
056 public void set(String name, Object instance) {
057 context.initInstance(instance, name);
058 instances.put(name, instance);
059 }
060
061 private int NUM_TYPED_INSTANCE = 1;
062
063 public void set(Object instance) {
064 if (instance == null)
065 throw new NullPointerException("Cannot register null component instance");
066 context.initInstance(instance, null);
067 if (!instances.containsValue(instance))
068 instances.put(TYPED + (NUM_TYPED_INSTANCE++), instance);
069 }
070
071 @Override
072 public void remove(String name) {
073 instances.remove(name);
074 }
075
076 @Override
077 public void clear() {
078 instances.clear();
079 }
080
081 public List<String> allNames() {
082 List<String> names = new ArrayList<String>(instances.size());
083 for (String name : instances.keySet()) {
084 if (!name.startsWith(TYPED))
085 names.add(name);
086 }
087 return names;
088 }
089
090 @SuppressWarnings("unchecked")
091 public <T> T byName(String name, Context context) {
092 return (T)instances.get(name);
093 }
094
095 protected Object createInstance() {
096 return null;
097 }
098
099 @SuppressWarnings("unchecked")
100 @Override
101 public <T> T byType(Class<T> type, Context context) {
102 T instance = null;
103 for (Object i : instances.values()) {
104 if (type.isInstance(i)) {
105 if (instance == null)
106 instance = (T)i;
107 else
108 throw new RuntimeException("Ambiguous component definition for class " + type);
109 }
110 }
111 return instance;
112 }
113
114 @SuppressWarnings("unchecked")
115 @Override
116 public <T> T[] allByType(Class<T> type, Context context, boolean create) {
117 List<T> list = new ArrayList<T>();
118 for (Object instance : instances.values()) {
119 if (type.isInstance(instance))
120 list.add((T)instance);
121 }
122 T[] all = (T[])Array.newInstance(type, list.size());
123 return list.size() > 0 ? list.toArray(all) : null;
124 }
125
126 @Override
127 public Map<String, Object> allByAnnotatedWith(Class<? extends Annotation> annotationClass, Context context) {
128 Map<String, Object> map = new HashMap<String, Object>();
129 for (Entry<String, Object> entry : instances.entrySet()) {
130 if (entry.getValue().getClass().isAnnotationPresent(annotationClass))
131 map.put(entry.getKey(), entry.getValue());
132 }
133 return map.isEmpty() ? null : map;
134 }
135
136 }