From 12486677c03600848a4d5822a87844eeaf995e43 Mon Sep 17 00:00:00 2001
From: Jeremy Grelle <jgrelle@vmware.com>
Date: Tue, 15 Apr 2008 22:04:39 +0000
Subject: [PATCH] SWF-611- Provide easy access to a flow's local MessageSource
 through EL in JSF templates.

---
 .../webflow/FlowMessageSourceResolver.java    | 72 +++++++++++++++++++
 .../faces/webflow/FlowPropertyResolver.java   |  1 +
 .../faces/webflow/FlowVariableResolver.java   |  1 +
 .../main/resources/META-INF/faces-config.xml  |  2 +-
 4 files changed, 75 insertions(+), 1 deletion(-)
 create mode 100644 spring-faces/src/main/java/org/springframework/faces/webflow/FlowMessageSourceResolver.java

diff --git a/spring-faces/src/main/java/org/springframework/faces/webflow/FlowMessageSourceResolver.java b/spring-faces/src/main/java/org/springframework/faces/webflow/FlowMessageSourceResolver.java
new file mode 100644
index 00000000..c2b7f2be
--- /dev/null
+++ b/spring-faces/src/main/java/org/springframework/faces/webflow/FlowMessageSourceResolver.java
@@ -0,0 +1,72 @@
+package org.springframework.faces.webflow;
+
+import java.util.Iterator;
+
+import javax.el.ELContext;
+import javax.el.ELResolver;
+import javax.el.PropertyNotWritableException;
+import javax.faces.context.FacesContext;
+
+import org.springframework.context.MessageSource;
+import org.springframework.util.StringUtils;
+import org.springframework.webflow.execution.RequestContextHolder;
+
+public class FlowMessageSourceResolver extends ELResolver {
+
+	private String MESSAGE_SOURCE_KEY = "resourceBundle";
+
+	public Class getCommonPropertyType(ELContext context, Object base) {
+		return Object.class;
+	}
+
+	public Iterator getFeatureDescriptors(ELContext context, Object base) {
+		return null;
+	}
+
+	public Class getType(ELContext context, Object base, Object property) {
+		if (base == null && MESSAGE_SOURCE_KEY.equals(property)) {
+			context.setPropertyResolved(true);
+			return MessageSource.class;
+		} else if (base != null && base instanceof MessageSource) {
+			MessageSource messageSource = (MessageSource) base;
+			String message = messageSource.getMessage(property.toString(), null, FacesContext.getCurrentInstance()
+					.getViewRoot().getLocale());
+			if (StringUtils.hasText(message)) {
+				context.setPropertyResolved(true);
+				return String.class;
+			}
+		}
+		return null;
+	}
+
+	public Object getValue(ELContext context, Object base, Object property) {
+		if (base == null && MESSAGE_SOURCE_KEY.equals(property)) {
+			context.setPropertyResolved(true);
+			return RequestContextHolder.getRequestContext().getActiveFlow().getApplicationContext();
+		} else if (base != null && base instanceof MessageSource) {
+			MessageSource messageSource = (MessageSource) base;
+			String message = messageSource.getMessage(property.toString(), null, FacesContext.getCurrentInstance()
+					.getViewRoot().getLocale());
+			if (StringUtils.hasText(message)) {
+				context.setPropertyResolved(true);
+				return message;
+			}
+		}
+		return null;
+	}
+
+	public boolean isReadOnly(ELContext context, Object base, Object property) {
+		if (base == null && MESSAGE_SOURCE_KEY.equals(property)) {
+			context.setPropertyResolved(true);
+			return true;
+		}
+		return false;
+	}
+
+	public void setValue(ELContext context, Object base, Object property, Object value) {
+		if (base == null && MESSAGE_SOURCE_KEY.equals(property)) {
+			throw new PropertyNotWritableException("The flow's MessageSource is not writable.");
+		}
+	}
+
+}
diff --git a/spring-faces/src/main/java/org/springframework/faces/webflow/FlowPropertyResolver.java b/spring-faces/src/main/java/org/springframework/faces/webflow/FlowPropertyResolver.java
index 0847d133..910b2e76 100644
--- a/spring-faces/src/main/java/org/springframework/faces/webflow/FlowPropertyResolver.java
+++ b/spring-faces/src/main/java/org/springframework/faces/webflow/FlowPropertyResolver.java
@@ -31,6 +31,7 @@ public class FlowPropertyResolver extends ELDelegatingPropertyResolver {
 	private static final CompositeELResolver composite = new CompositeELResolver();
 
 	static {
+		composite.add(new FlowMessageSourceResolver());
 		composite.add(new MapAdaptableELResolver());
 	}
 
diff --git a/spring-faces/src/main/java/org/springframework/faces/webflow/FlowVariableResolver.java b/spring-faces/src/main/java/org/springframework/faces/webflow/FlowVariableResolver.java
index 12068a9e..96226737 100644
--- a/spring-faces/src/main/java/org/springframework/faces/webflow/FlowVariableResolver.java
+++ b/spring-faces/src/main/java/org/springframework/faces/webflow/FlowVariableResolver.java
@@ -35,6 +35,7 @@ public class FlowVariableResolver extends ELDelegatingVariableResolver {
 	static {
 		composite.add(new RequestContextELResolver());
 		composite.add(new ImplicitFlowVariableELResolver());
+		composite.add(new FlowMessageSourceResolver());
 		composite.add(new ScopeSearchingELResolver());
 	}
 
diff --git a/spring-faces/src/main/resources/META-INF/faces-config.xml b/spring-faces/src/main/resources/META-INF/faces-config.xml
index 18ceb947..498a8e41 100644
--- a/spring-faces/src/main/resources/META-INF/faces-config.xml
+++ b/spring-faces/src/main/resources/META-INF/faces-config.xml
@@ -9,8 +9,8 @@
 		<action-listener>org.springframework.faces.webflow.FlowActionListener</action-listener>
 		<action-listener>org.springframework.faces.model.SelectionTrackingActionListener</action-listener>
 		<variable-resolver>org.springframework.faces.webflow.FlowVariableResolver</variable-resolver>
+        <property-resolver>org.springframework.faces.webflow.FlowPropertyResolver</property-resolver>
 		<variable-resolver>org.springframework.faces.webflow.SpringBeanWebFlowVariableResolver</variable-resolver>
-		<property-resolver>org.springframework.faces.webflow.FlowPropertyResolver</property-resolver>
 		<view-handler>org.springframework.faces.webflow.FlowViewHandler</view-handler>
 	</application>