svn commit: r962936 [3/3] - in /myfaces/extensions/cdi/trunk: core/api/src/main/java/org/apache/myfaces/extensions/cdi/core/api/config/ core/api/src/main/java/org/apache/myfaces/extensions/cdi/core/api/scope/conversation/ core/api/src/main/java/org/apa...

[gp...@apache.org]

Added: myfaces/extensions/cdi/trunk/jee-modules/jsf-module/impl/src/main/java/org/apache/myfaces/extensions/cdi/javaee/jsf/impl/util/ConversationUtils.java
URL: http://svn.apache.org/viewvc/myfaces/extensions/cdi/trunk/jee-modules/jsf-module/impl/src/main/java/org/apache/myfaces/extensions/cdi/javaee/jsf/impl/util/ConversationUtils.java?rev=962936&view=auto
==============================================================================
--- myfaces/extensions/cdi/trunk/jee-modules/jsf-module/impl/src/main/java/org/apache/myfaces/extensions/cdi/javaee/jsf/impl/util/ConversationUtils.java (added)
+++ myfaces/extensions/cdi/trunk/jee-modules/jsf-module/impl/src/main/java/org/apache/myfaces/extensions/cdi/javaee/jsf/impl/util/ConversationUtils.java Sat Jul 10 22:46:47 2010
@@ -0,0 +1,138 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.apache.myfaces.extensions.cdi.javaee.jsf.impl.util;
+
+import org.apache.myfaces.extensions.cdi.core.api.manager.BeanManagerProvider;
+import org.apache.myfaces.extensions.cdi.core.api.tools.annotate.DefaultAnnotation;
+import org.apache.myfaces.extensions.cdi.core.impl.scope.conversation.spi.WindowContextManager;
+import org.apache.myfaces.extensions.cdi.javaee.jsf.api.qualifier.Jsf;
+import org.apache.myfaces.extensions.cdi.javaee.jsf.impl.scope.conversation.WindowContextIdHolderComponent;
+
+import javax.enterprise.inject.spi.Bean;
+import javax.enterprise.inject.spi.BeanManager;
+import javax.faces.component.UIComponent;
+import javax.faces.context.FacesContext;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * @author Gerhard Petracek
+ */
+public class ConversationUtils
+{
+    /**
+     * @return the descriptor of a custom
+     * {@link org.apache.myfaces.extensions.cdi.core.impl.scope.conversation.spi.WindowContextManager}
+     * with the qualifier {@link org.apache.myfaces.extensions.cdi.javaee.jsf.api.qualifier.Jsf} or
+     *         the descriptor of the default implementation provided by this module
+     */
+    public static Bean<WindowContextManager> resolveConversationManagerBean()
+    {
+        BeanManager beanManager = BeanManagerProvider.getInstance().getBeanManager();
+
+        Set<?> conversationManagerBeans = beanManager.getBeans(
+                WindowContextManager.class, DefaultAnnotation.of(Jsf.class));
+
+        if (conversationManagerBeans.isEmpty())
+        {
+            conversationManagerBeans = getDefaultConversationManager(beanManager);
+        }
+
+        if (conversationManagerBeans.size() != 1)
+        {
+            throw new IllegalStateException(conversationManagerBeans.size() + " conversation-managers were found");
+        }
+        //noinspection unchecked
+        return (Bean<WindowContextManager>) conversationManagerBeans.iterator().next();
+    }
+
+    /**
+     * @param beanManager current {@link javax.enterprise.inject.spi.BeanManager}
+     * @return the descriptor of the default
+     * {@link org.apache.myfaces.extensions.cdi.core.impl.scope.conversation.spi.WindowContextManager}
+     */
+    private static Set<Bean<?>> getDefaultConversationManager(BeanManager beanManager)
+    {
+        return beanManager.getBeans(WindowContextManager.class);
+    }
+
+    public static Long resolveWindowContextId(boolean requestParameterSupported)
+    {
+        FacesContext facesContext = FacesContext.getCurrentInstance();
+
+        Map requestParameterMap = facesContext.getExternalContext().getRequestParameterMap();
+
+        String idViaGetRequest = null;
+
+        if (requestParameterSupported)
+        {
+            idViaGetRequest = (String) requestParameterMap
+                    .get(WindowContextManager.WINDOW_CONTEXT_ID_PARAMETER_KEY);
+        }
+
+        Long id = null;
+        if (idViaGetRequest != null)
+        {
+            try
+            {
+                id = Long.parseLong(idViaGetRequest);
+            }
+            catch (NumberFormatException e)
+            {
+                id = null;
+            }
+        }
+
+        if (id == null)
+        {
+            Map requestMap = facesContext.getExternalContext().getRequestMap();
+
+            id = (Long) requestMap.get(WindowContextManager.WINDOW_CONTEXT_ID_PARAMETER_KEY);
+        }
+
+        if (id != null)
+        {
+            return id;
+        }
+
+        WindowContextIdHolderComponent windowContextIdHolder = getWindowContextIdHolderComponent(facesContext);
+
+        if (windowContextIdHolder != null)
+        {
+            return windowContextIdHolder.getWindowContextId();
+        }
+
+        return null;
+    }
+
+    public static WindowContextIdHolderComponent getWindowContextIdHolderComponent(FacesContext facesContext)
+    {
+        List<UIComponent> uiComponents = facesContext.getViewRoot().getChildren();
+        for (UIComponent uiComponent : uiComponents)
+        {
+            if (uiComponent instanceof WindowContextIdHolderComponent)
+            {
+                return ((WindowContextIdHolderComponent) uiComponent);
+            }
+        }
+
+        return null;
+    }
+}